chore(deps): update Go dependencies

* initial changes

* Add tests

* Fix edge case when we need to regenerate appearances

* Fix comments

* Add missing comment

* Add missing comment

* Add missing comment

* Add flatten option to the merge route

* Add flatten option to the libreoffice convert route

* Add flatten option to the chromium convert route

* Revert "Add flatten option to the chromium convert route"

This reverts commit cdab8b4e6b.

* Ignore lint false positives

* Add missing tests

* Add flatten route tests

* Replace input instead of creating a new file

* create copy before flatten in tests

---------

Co-authored-by: Peter Chakalov <peter.chakalov@abraxa.com>

.env

@@ -0,0 +1,14 @@
+GOLANG_VERSION=1.23
+DOCKER_REGISTRY=gotenberg
+DOCKER_REPOSITORY=gotenberg
+GOTENBERG_VERSION=snapshot
+GOTENBERG_USER_GID=1001
+GOTENBERG_USER_UID=1001
+NOTO_COLOR_EMOJI_VERSION=v2.047 # See https://github.com/googlefonts/noto-emoji/releases.
+PDFTK_VERSION=v3.3.3 # See https://gitlab.com/pdftk-java/pdftk/-/releases - Binary package.
+PDFCPU_VERSION=v0.8.1 # See https://github.com/pdfcpu/pdfcpu/releases.
+GOLANGCI_LINT_VERSION=v1.63.4 # See https://github.com/golangci/golangci-lint/releases.
+GOTENBERG_VERSION=snapshot
+DOCKERFILE=build/Dockerfile
+DOCKERFILE_CLOUDRUN=build/Dockerfile.cloudrun
+DOCKER_BUILD_CONTEXT='.'

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: [gulien]

.github/stale.yml

@@ -1,7 +1,7 @@
 # Number of days of inactivity before an issue becomes stale
-daysUntilStale: 15
+daysUntilStale: 7
 # Number of days of inactivity before a stale issue is closed
-daysUntilClose: 7
+daysUntilClose: 3
 # Issues with these labels will never be considered stale
 exemptLabels:
   - bug

.github/workflows/__build-push.yml

@@ -0,0 +1,51 @@
+on:
+  workflow_call:
+    inputs:
+      runs_on:
+        type: string
+        required: true
+      platform:
+        type: string
+        required: true
+      gotenberg_version:
+        type: string
+        required: true
+      alternate_repository:
+        type: string
+        default: ''
+    outputs:
+      tags:
+        value: ${{ jobs.build_push.outputs.tags }}
+
+permissions:
+  contents: read
+
+jobs:
+  build_push:
+    name: Build and push Docker images
+    runs-on: ${{ inputs.runs_on }}
+    outputs:
+      tags: ${{ steps.build_push.outputs.tags }}
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push ${{ inputs.platform }}
+        id: build_push
+        uses: gotenberg/gotenberg-release-action/actions/build-push@main
+        with:
+          version: ${{ inputs.gotenberg_version }}
+          platform: ${{ inputs.platform }}
+          alternate_repository: ${{ inputs.alternate_repository }}

.github/workflows/__delete.yml

@@ -0,0 +1,28 @@
+on:
+  workflow_call:
+    inputs:
+      gotenberg_version:
+        type: string
+        required: true
+      alternate_repository:
+        type: string
+        default: ''
+
+permissions:
+  contents: read
+
+jobs:
+  delete:
+    name: Delete Docker images
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Delete
+        uses: gotenberg/gotenberg-release-action/actions/delete@main
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: ${{ inputs.gotenberg_version }}
+          alternate_repository: ${{ inputs.alternate_repository }}

.github/workflows/__merge-clean.yml

@@ -0,0 +1,40 @@
+on:
+  workflow_call:
+    inputs:
+      tags:
+        type: string
+        required: true
+      alternate_registry:
+        type: string
+        default: ''
+
+permissions:
+  contents: read
+
+jobs:
+  merge_clean:
+    name: Merge and clean Docker images
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Merge and clean
+        uses: gotenberg/gotenberg-release-action/actions/merge-clean@main
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: ${{ inputs.tags }}
+          alternate_registry: ${{ inputs.alternate_registry }}

.github/workflows/continuous-delivery.yml

@@ -0,0 +1,58 @@
+name: Continuous Delivery
+
+on:
+  release:
+    types: [ published ]
+
+permissions:
+  contents: read
+
+jobs:
+  release_amd64:
+    name: Release linux/amd64
+    uses: ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-latest
+      platform: linux/amd64
+      gotenberg_version: ${{ github.event.release.tag_name }}
+
+  release_386:
+    name: Release linux/386
+    uses: ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-latest
+      platform: linux/386
+      gotenberg_version: ${{ github.event.release.tag_name }}
+
+  release_arm64:
+    name: Release linux/arm64
+    uses: ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-24.04-arm
+      platform: linux/arm64
+      gotenberg_version: ${{ github.event.release.tag_name }}
+
+  release_arm_v7:
+    name: Release linux/arm/v7
+    uses: ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-24.04-arm
+      platform: linux/arm/v7
+      gotenberg_version: ${{ github.event.release.tag_name }}
+
+  merge_clean_release_tags:
+    needs:
+      - release_amd64
+      - release_386
+      - release_arm64
+      - release_arm_v7
+    name: Merge and clean release tags
+    uses: ./.github/workflows/__merge-clean.yml
+    secrets: inherit
+    with:
+      tags: "${{ needs.release_amd64.outputs.tags }},${{ needs.release_386.outputs.tags }},${{ needs.release_arm64.outputs.tags }},${{ needs.release_arm_v7.outputs.tags }}"
+      alternate_registry: thecodingmachine

.github/workflows/continuous-integration.yml

@@ -0,0 +1,188 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ (github.event_name == 'pull_request' && github.event.pull_request.number) || 'main' }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+
+jobs:
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.23'
+          cache: false
+
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Run linters
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: v1.63.4
+
+  tests:
+    needs:
+      - lint
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Build testing environment
+        run: make build build-tests
+
+      - name: Run tests
+        run: make tests-once
+
+      - name: Upload to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          verbose: true
+
+  snapshot_amd64:
+    if: github.event_name == 'pull_request'
+    needs:
+      - tests
+    name: Snapshot linux/amd64
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-latest
+      platform: linux/amd64
+      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      alternate_repository: snapshot
+
+  snapshot_386:
+    if: github.event_name == 'pull_request'
+    needs:
+      - tests
+    name: Snapshot linux/386
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-latest
+      platform: linux/386
+      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      alternate_repository: snapshot
+
+  snapshot_arm64:
+    if: github.event_name == 'pull_request'
+    needs:
+      - tests
+    name: Snapshot linux/arm64
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-24.04-arm
+      platform: linux/arm64
+      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      alternate_repository: snapshot
+
+  snapshot_arm_v7:
+    if: github.event_name == 'pull_request'
+    needs:
+      - tests
+    name: Snapshot linux/arm/v7
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-24.04-arm
+      platform: linux/arm/v7
+      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      alternate_repository: snapshot
+
+  merge_clean_snapshot_tags:
+    needs:
+      - snapshot_amd64
+      - snapshot_386
+      - snapshot_arm64
+      - snapshot_arm_v7
+    name: Merge and clean snapshot tags
+    uses:  ./.github/workflows/__merge-clean.yml
+    secrets: inherit
+    with:
+      tags: "${{ needs.snapshot_amd64.outputs.tags }},${{ needs.snapshot_386.outputs.tags }},${{ needs.snapshot_arm64.outputs.tags }},${{ needs.snapshot_arm_v7.outputs.tags }}"
+
+  edge_amd64:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs:
+      - tests
+    name: Edge linux/amd64
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-latest
+      platform: linux/amd64
+      gotenberg_version: edge
+
+  edge_386:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs:
+      - tests
+    name: Edge linux/386
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-latest
+      platform: linux/386
+      gotenberg_version: edge
+
+  edge_arm64:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs:
+      - tests
+    name: Edge linux/arm64
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-24.04-arm
+      platform: linux/arm64
+      gotenberg_version: edge
+
+  edge_arm_v7:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs:
+      - tests
+    name: Edge linux/arm/v7
+    uses:  ./.github/workflows/__build-push.yml
+    secrets: inherit
+    with:
+      runs_on: ubuntu-24.04-arm
+      platform: linux/arm/v7
+      gotenberg_version: edge
+
+  merge_clean_edge_tags:
+    needs:
+      - edge_amd64
+      - edge_386
+      - edge_arm64
+      - edge_arm_v7
+    name: Merge and clean edge tags
+    uses: ./.github/workflows/__merge-clean.yml
+    secrets: inherit
+    with:
+      tags: "${{ needs.edge_amd64.outputs.tags }},${{ needs.edge_386.outputs.tags }},${{ needs.edge_arm64.outputs.tags }},${{ needs.edge_arm_v7.outputs.tags }}"
+      alternate_registry: thecodingmachine

.github/workflows/continuous_delivery.yml

@@ -1,26 +0,0 @@
-name: Continuous Delivery
-
-on:
-  release:
-    types: [ published ]
-
-jobs:
-  release:
-    name: Release Docker image
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-      - name: Checkout source code
-        uses: actions/checkout@v4
-      - name: Log in to Docker Hub Container Registry
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Build and push Docker image for release
-        run: |
-          make release GOTENBERG_VERSION=${{ github.event.release.tag_name }}
-          make release GOTENBERG_VERSION=${{ github.event.release.tag_name }} DOCKER_REPOSITORY=thecodingmachine

.github/workflows/continuous_integration.yml

@@ -1,71 +0,0 @@
-name: Continuous Integration
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    branches:
-      - main
-
-jobs:
-
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-    steps:
-      - name: Setup Go
-        uses: actions/setup-go@v4
-        with:
-          go-version: '1.21'
-          cache: false
-      - name: Checkout source code
-        uses: actions/checkout@v4
-      - name: Run linters
-        uses: golangci/golangci-lint-action@v3
-        with:
-          version: v1.54.2
-
-  tests:
-    needs:
-      - Lint
-    name: Tests
-    # TODO: once arm64 actions are available, also run the tests on this architecture.
-    # See: https://github.com/actions/virtual-environments/issues/2552#issuecomment-771478000.
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-      - name: Checkout source code
-        uses: actions/checkout@v4
-      - name: Build testing environment
-        run: make build build-tests
-      - name: Run tests
-        run: |
-          make tests-once
-          bash <(curl -s https://codecov.io/bash)
-
-  multiarch_build:
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    needs:
-      - Tests
-    name: Multi-arch build
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-      - name: Checkout source code
-        uses: actions/checkout@v4
-      - name: Log in to Docker Hub Container Registry
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Build and push Docker image for main branch
-        run: |
-          make release GOTENBERG_VERSION=edge
-          make release GOTENBERG_VERSION=edge DOCKER_REPOSITORY=thecodingmachine

.github/workflows/pull-request-cleanup.yml

@@ -0,0 +1,18 @@
+name: Pull Request Cleanup
+
+on:
+  pull_request:
+    types: [ closed ]
+
+permissions:
+  contents: read
+
+jobs:
+
+  cleanup:
+    name: Cleanup
+    uses: ./.github/workflows/__delete.yml
+    secrets: inherit
+    with:
+      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      alternate_repository: snapshot

.gitignore

@@ -1,3 +1,5 @@
 /coverage.html
 /coverage.txt
-/TODO.txt
+.idea
+.vscode
+.DS_Store

.golangci.yml

@@ -3,35 +3,54 @@ linters-settings:
     sections:
       - standard
       - default
-      - prefix(github.com/gotenberg/gotenberg/v7)
+      - prefix(github.com/gotenberg/gotenberg/v8)
     skip-generated: true
-    skip-vendor: true
     custom-order: true
 
 linters:
   disable-all: true
   enable:
+    - asasalint
+    - asciicheck
+    - bidichk
     - bodyclose
+    - decorder
+    - dogsled
+    - dupl
+    - dupword
+    - durationcheck
+    - copyloopvar
     - errcheck
+    - errname
+    - exhaustive
     - gci
+    - gofmt
+    - goimports
     - gofumpt
     - gosec
     - gosimple
     - govet
     - ineffassign
+    - importas
     - misspell
     - prealloc
+    - promlinter
+    #- sloglint
     - staticcheck
+    - tenv
+    - testableexamples
+    - tparallel
     - typecheck
     - unconvert
     - unused
+    - wastedassign
+    - whitespace
 
 run:
-  deadline: 5m
+  timeout: 5m
   issues-exit-code: 1
   tests: false
 
 output:
-  format: 'colored-line-number'
   print-issued-lines: true
-  print-linter-name: true
+  print-linter-name: true

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 Julien Neuhart
+Copyright (c) Julien Neuhart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -1,3 +1,5 @@
+include .env
+
 .PHONY: help
 help: ## Show the help
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
@@ -5,15 +7,6 @@ help: ## Show the help
 .PHONY: it
 it: build build-tests ## Initialize the development environment
 
-GOLANG_VERSION=1.21
-DOCKER_REPOSITORY=gotenberg
-GOTENBERG_VERSION=snapshot
-GOTENBERG_USER_GID=1001
-GOTENBERG_USER_UID=1001
-NOTO_COLOR_EMOJI_VERSION=v2.040 # See https://github.com/googlefonts/noto-emoji/releases.
-PDFTK_VERSION=v3.3.3 # See https://gitlab.com/pdftk-java/pdftk/-/releases - Binary package.
-GOLANGCI_LINT_VERSION=v1.54.2 # See https://github.com/golangci/golangci-lint/releases.
-
 .PHONY: build
 build: ## Build the Gotenberg's Docker image
 	docker build \
@@ -23,19 +16,31 @@ build: ## Build the Gotenberg's Docker image
 	--build-arg GOTENBERG_USER_UID=$(GOTENBERG_USER_UID) \
 	--build-arg NOTO_COLOR_EMOJI_VERSION=$(NOTO_COLOR_EMOJI_VERSION) \
 	--build-arg PDFTK_VERSION=$(PDFTK_VERSION) \
-	-t $(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION) \
-	-f build/Dockerfile .
+	--build-arg PDFCPU_VERSION=$(PDFCPU_VERSION) \
+	-t $(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION) \
+	-f $(DOCKERFILE) $(DOCKER_BUILD_CONTEXT)
 
 GOTENBERG_GRACEFUL_SHUTDOWN_DURATION=30s
 API_PORT=3000
 API_PORT_FROM_ENV=
+API_BIND_IP=
+API_START_TIMEOUT=30s
 API_TIMEOUT=30s
-API_ROOT_PATH=/
+API_BODY_LIMIT=
+API_ROOT_PATH="/"
 API_TRACE_HEADER=Gotenberg-Trace
+API_ENABLE_BASIC_AUTH=false
+GOTENBERG_API_BASIC_AUTH_USERNAME=
+GOTENBERG_API_BASIC_AUTH_PASSWORD=
+API-DOWNLOAD-FROM-ALLOW-LIST=
+API-DOWNLOAD-FROM-DENY-LIST=
+API-DOWNLOAD-FROM-FROM-MAX-RETRY=4
+API-DISABLE-DOWNLOAD-FROM=false
 API_DISABLE_HEALTH_CHECK_LOGGING=false
-CHROMIUM_RESTART_AFTER=0
+CHROMIUM_RESTART_AFTER=10
+CHROMIUM_MAX_QUEUE_SIZE=0
 CHROMIUM_AUTO_START=false
-CHROMIUM_START_TIMEOUT=10s
+CHROMIUM_START_TIMEOUT=20s
 CHROMIUM_INCOGNITO=false
 CHROMIUM_ALLOW_INSECURE_LOCALHOST=false
 CHROMIUM_IGNORE_CERTIFICATE_ERRORS=false
@@ -44,17 +49,26 @@ CHROMIUM_ALLOW_FILE_ACCESS_FROM_FILES=false
 CHROMIUM_HOST_RESOLVER_RULES=
 CHROMIUM_PROXY_SERVER=
 CHROMIUM_ALLOW_LIST=
-CHROMIUM_DENY_LIST="^file:///[^tmp].*"
+CHROMIUM_DENY_LIST=^file:(?!//\/tmp/).*
+CHROMIUM_CLEAR_CACHE=false
+CHROMIUM_CLEAR_COOKIES=false
 CHROMIUM_DISABLE_JAVASCRIPT=false
 CHROMIUM_DISABLE_ROUTES=false
 LIBREOFFICE_RESTART_AFTER=10
+LIBREOFFICE_MAX_QUEUE_SIZE=0
 LIBREOFFICE_AUTO_START=false
-LIBREOFFICE_START_TIMEOUT=10s
+LIBREOFFICE_START_TIMEOUT=20s
 LIBREOFFICE_DISABLE_ROUTES=false
 LOG_LEVEL=info
 LOG_FORMAT=auto
 LOG_FIELDS_PREFIX=
 PDFENGINES_ENGINES=
+PDFENGINES_MERGE_ENGINES=qpdf,pdfcpu,pdftk
+PDFENGINES_SPLIT_ENGINES=pdfcpu,qpdf,pdftk
+PDFENGINES_FLATTEN_ENGINES=qpdf
+PDFENGINES_CONVERT_ENGINES=libreoffice-pdfengine
+PDFENGINES_READ_METADATA_ENGINES=exiftool
+PDFENGINES_WRITE_METADATA_ENGINES=exiftool
 PDFENGINES_DISABLE_ROUTES=false
 PROMETHEUS_NAMESPACE=gotenberg
 PROMETHEUS_COLLECT_INTERVAL=1s
@@ -74,17 +88,28 @@ WEBHOOK_DISABLE=false
 run: ## Start a Gotenberg container
 	docker run --rm -it \
 	-p $(API_PORT):$(API_PORT) \
-	$(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION) \
+	-e GOTENBERG_API_BASIC_AUTH_USERNAME=$(GOTENBERG_API_BASIC_AUTH_USERNAME) \
+	-e GOTENBERG_API_BASIC_AUTH_PASSWORD=$(GOTENBERG_API_BASIC_AUTH_PASSWORD) \
+	$(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION) \
 	gotenberg \
 	--gotenberg-graceful-shutdown-duration=$(GOTENBERG_GRACEFUL_SHUTDOWN_DURATION) \
 	--api-port=$(API_PORT) \
 	--api-port-from-env=$(API_PORT_FROM_ENV) \
+	--api-bind-ip=$(API_BIND_IP) \
+	--api-start-timeout=$(API_START_TIMEOUT) \
 	--api-timeout=$(API_TIMEOUT) \
+	--api-body-limit="$(API_BODY_LIMIT)" \
 	--api-root-path=$(API_ROOT_PATH) \
 	--api-trace-header=$(API_TRACE_HEADER) \
+	--api-enable-basic-auth=$(API_ENABLE_BASIC_AUTH) \
+	--api-download-from-allow-list=$(API-DOWNLOAD-FROM-ALLOW-LIST) \
+	--api-download-from-deny-list=$(API-DOWNLOAD-FROM-DENY-LIST) \
+	--api-download-from-max-retry=$(API-DOWNLOAD-FROM-FROM-MAX-RETRY) \
+	--api-disable-download-from=$(API-DISABLE-DOWNLOAD-FROM) \
 	--api-disable-health-check-logging=$(API_DISABLE_HEALTH_CHECK_LOGGING) \
 	--chromium-restart-after=$(CHROMIUM_RESTART_AFTER) \
 	--chromium-auto-start=$(CHROMIUM_AUTO_START) \
+	--chromium-max-queue-size=$(CHROMIUM_MAX_QUEUE_SIZE) \
 	--chromium-start-timeout=$(CHROMIUM_START_TIMEOUT) \
 	--chromium-incognito=$(CHROMIUM_INCOGNITO) \
 	--chromium-allow-insecure-localhost=$(CHROMIUM_ALLOW_INSECURE_LOCALHOST) \
@@ -93,11 +118,14 @@ run: ## Start a Gotenberg container
 	--chromium-allow-file-access-from-files=$(CHROMIUM_ALLOW_FILE_ACCESS_FROM_FILES) \
 	--chromium-host-resolver-rules=$(CHROMIUM_HOST_RESOLVER_RULES) \
 	--chromium-proxy-server=$(CHROMIUM_PROXY_SERVER) \
-	--chromium-allow-list=$(CHROMIUM_ALLOW_LIST) \
-	--chromium-deny-list=$(CHROMIUM_DENY_LIST) \
+	--chromium-allow-list="$(CHROMIUM_ALLOW_LIST)" \
+	--chromium-deny-list="$(CHROMIUM_DENY_LIST)" \
+	--chromium-clear-cache=$(CHROMIUM_CLEAR_CACHE) \
+	--chromium-clear-cookies=$(CHROMIUM_CLEAR_COOKIES) \
 	--chromium-disable-javascript=$(CHROMIUM_DISABLE_JAVASCRIPT) \
 	--chromium-disable-routes=$(CHROMIUM_DISABLE_ROUTES) \
 	--libreoffice-restart-after=$(LIBREOFFICE_RESTART_AFTER) \
+	--libreoffice-max-queue-size=$(LIBREOFFICE_MAX_QUEUE_SIZE) \
 	--libreoffice-auto-start=$(LIBREOFFICE_AUTO_START) \
 	--libreoffice-start-timeout=$(LIBREOFFICE_START_TIMEOUT) \
 	--libreoffice-disable-routes=$(LIBREOFFICE_DISABLE_ROUTES) \
@@ -105,13 +133,19 @@ run: ## Start a Gotenberg container
 	--log-format=$(LOG_FORMAT) \
 	--log-fields-prefix=$(LOG_FIELDS_PREFIX) \
 	--pdfengines-engines=$(PDFENGINES_ENGINES) \
+	--pdfengines-merge-engines=$(PDFENGINES_MERGE_ENGINES) \
+	--pdfengines-split-engines=$(PDFENGINES_SPLIT_ENGINES) \
+	--pdfengines-convert-engines=$(PDFENGINES_FLATTEN_ENGINES) \
+	--pdfengines-convert-engines=$(PDFENGINES_CONVERT_ENGINES) \
+	--pdfengines-read-metadata-engines=$(PDFENGINES_READ_METADATA_ENGINES) \
+	--pdfengines-write-metadata-engines=$(PDFENGINES_WRITE_METADATA_ENGINES) \
 	--pdfengines-disable-routes=$(PDFENGINES_DISABLE_ROUTES) \
 	--prometheus-namespace=$(PROMETHEUS_NAMESPACE) \
 	--prometheus-collect-interval=$(PROMETHEUS_COLLECT_INTERVAL) \
 	--prometheus-disable-route-logging=$(PROMETHEUS_DISABLE_ROUTE_LOGGING) \
 	--prometheus-disable-collect=$(PROMETHEUS_DISABLE_COLLECT) \
-	--webhook-allow-list=$(WEBHOOK_ALLOW_LIST) \
-	--webhook-deny-list=$(WEBHOOK_DENY_LIST) \
+	--webhook-allow-list="$(WEBHOOK_ALLOW_LIST)" \
+	--webhook-deny-list="$(WEBHOOK_DENY_LIST)" \
 	--webhook-error-allow-list=$(WEBHOOK_ERROR_ALLOW_LIST) \
 	--webhook-error-deny-list=$(WEBHOOK_ERROR_DENY_LIST) \
 	--webhook-max-retry=$(WEBHOOK_MAX_RETRY) \
@@ -124,24 +158,25 @@ run: ## Start a Gotenberg container
 build-tests: ## Build the tests' Docker image
 	docker build \
 	--build-arg GOLANG_VERSION=$(GOLANG_VERSION) \
+	--build-arg DOCKER_REGISTRY=$(DOCKER_REGISTRY) \
 	--build-arg DOCKER_REPOSITORY=$(DOCKER_REPOSITORY) \
 	--build-arg GOTENBERG_VERSION=$(GOTENBERG_VERSION) \
 	--build-arg GOLANGCI_LINT_VERSION=$(GOLANGCI_LINT_VERSION) \
-	-t $(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION)-tests \
+	-t $(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION)-tests \
 	-f test/Dockerfile .
 
 .PHONY: tests
 tests: ## Start the testing environment
 	docker run --rm -it \
 	-v $(PWD):/tests \
-	$(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION)-tests \
+	$(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION)-tests \
 	bash
 
 .PHONY: tests-once
 tests-once: ## Run the tests once (prefer the "tests" command while developing)
 	docker run --rm  \
 	-v $(PWD):/tests \
-	$(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION)-tests \
+	$(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION)-tests \
 	gotest
 
 # go install mvdan.cc/gofumpt@latest
@@ -149,22 +184,11 @@ tests-once: ## Run the tests once (prefer the "tests" command while developing)
 .PHONY: fmt
 fmt: ## Format the code and "optimize" the dependencies
 	gofumpt -l -w .
-	gci write -s standard -s default -s "prefix(github.com/gotenberg/gotenberg/v7)" --skip-generated --skip-vendor --custom-order .
+	gci write -s standard -s default -s "prefix(github.com/gotenberg/gotenberg/v8)" --skip-generated --skip-vendor --custom-order .
 	go mod tidy
 
 # go install golang.org/x/tools/cmd/godoc@latest
 .PHONY: godoc
 godoc: ## Run a webserver with Gotenberg godoc
-	$(info http://localhost:6060/pkg/github.com/gotenberg/gotenberg/v7)
+	$(info http://localhost:6060/pkg/github.com/gotenberg/gotenberg/v8)
 	godoc -http=:6060
-
-.PHONY: release
-release: ## Build the Gotenberg's Docker image for many platforms, then push it to a Docker repository
-	./scripts/release.sh \
- 	$(GOLANG_VERSION) \
-	$(GOTENBERG_VERSION) \
-	$(GOTENBERG_USER_GID) \
-	$(GOTENBERG_USER_UID) \
-	$(NOTO_COLOR_EMOJI_VERSION) \
-	$(PDFTK_VERSION) \
-	$(DOCKER_REPOSITORY)

README.md

@@ -2,12 +2,20 @@
     <img src="https://user-images.githubusercontent.com/8983173/130322857-185831e2-f041-46eb-a17f-0a69d066c4e5.png" alt="Gotenberg Logo" width="150" height="150" />
     <h3 align="center">Gotenberg</h3>
     <p align="center">A Docker-powered stateless API for PDF files</p>
+    <p align="center">
+        <a href="https://hub.docker.com/r/gotenberg/gotenberg"><img alt="Total downloads (gotenberg/gotenberg)" src="https://img.shields.io/docker/pulls/gotenberg/gotenberg"></a>
+        <a href="https://hub.docker.com/r/thecodingmachine/gotenberg"><img alt="Total downloads (thecodingmachine/gotenberg)" src="https://img.shields.io/docker/pulls/thecodingmachine/gotenberg"></a>
+        <br>
+        <a href="https://github.com/gotenberg/gotenberg/actions/workflows/continuous-integration.yml"><img alt="Continuous Integration" src="https://github.com/gotenberg/gotenberg/actions/workflows/continuous-integration.yml/badge.svg"></a>
+        <a href="https://pkg.go.dev/github.com/gotenberg/gotenberg/v8"><img alt="Go Reference" src="https://pkg.go.dev/badge/github.com/gotenberg/gotenberg.svg"></a>
+        <a href="https://codecov.io/gh/gotenberg/gotenberg/branch/main/graph/badge.svg"><img alt="Code coverage" src="https://codecov.io/gh/gotenberg/gotenberg/branch/main/graph/badge.svg"></a>
+    </p>
     <p align="center"><a href="https://gotenberg.dev/docs/getting-started/introduction">Documentation</a> &#183; <a href="https://gotenberg.dev/docs/getting-started/installation#live-demo-">Live Demo</a> 🔥</p>
 </p>
 
 ---
 
-Gotenberg provides a developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting 
+**Gotenberg** provides a developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting 
 numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more!
 
 ## Quick Start
@@ -15,13 +23,13 @@ numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, an
 Open a terminal and run the following command:
 
 ```
-docker run --rm -p 3000:3000 gotenberg/gotenberg:7
+docker run --rm -p 3000:3000 gotenberg/gotenberg:8
 ```
 
 Alternatively, using the historic Docker repository from our sponsor [TheCodingMachine](https://www.thecodingmachine.com):
 
 ```
-docker run --rm -p 3000:3000 thecodingmachine/gotenberg:7
+docker run --rm -p 3000:3000 thecodingmachine/gotenberg:8
 ```
 
 The API is now available on your host at http://localhost:3000.
@@ -32,14 +40,11 @@ Head to the [documentation](https://gotenberg.dev/docs/getting-started/introduct
 
 <p align="center">
     <a href="https://thecodingmachine.com">
-        <img src="https://user-images.githubusercontent.com/8983173/130324668-9d6e7b35-53a3-49c7-a574-38190d2bd6b0.png" alt="TheCodingMachine Logo" width="429" height="210" />
+        <img src="https://user-images.githubusercontent.com/8983173/130324668-9d6e7b35-53a3-49c7-a574-38190d2bd6b0.png" alt="TheCodingMachine Logo" width="333" height="163" />
+    </a>
+    <a href="https://zolsec.com?utm_source=gotenberg_github&utm_medium=website" target="_blank">
+        <img src="https://github.com/gotenberg/gotenberg/assets/8983173/707ccc97-a79b-4dcb-8fc8-6827366e5be3" alt="Zolsec Logo" width="333" height="163" />
     </a>
 </p>
 
-## Badges
-
-[![Docker pulls](https://img.shields.io/docker/pulls/gotenberg/gotenberg)](https://hub.docker.com/r/gotenberg/gotenberg)
-[![Docker pulls](https://img.shields.io/docker/pulls/thecodingmachine/gotenberg)](https://hub.docker.com/r/thecodingmachine/gotenberg)
-[![Continuous Integration](https://github.com/gotenberg/gotenberg/actions/workflows/continuous_integration.yml/badge.svg)](https://github.com/gotenberg/gotenberg/actions/workflows/continuous_integration.yml)
-[![Go Reference](https://pkg.go.dev/badge/github.com/gotenberg/gotenberg.svg)](https://pkg.go.dev/github.com/gotenberg/gotenberg/v7)
-[![Codecov](https://codecov.io/gh/gotenberg/gotenberg/branch/main/graph/badge.svg)](https://codecov.io/gh/gotenberg/gotenberg)
+Sponsorships help maintaining and improving Gotenberg - [become a sponsor](https://github.com/sponsors/gulien) ❤️

build/Dockerfile

@@ -2,15 +2,39 @@
 # concatenate them. Also, we have to repeat ARG instructions in each build
 # stage that uses them.
 ARG GOLANG_VERSION
-ARG GOTENBERG_VERSION
+
+# ----------------------------------------------
+# pdfcpu binary build stage
+# ----------------------------------------------
+# Note: this stage is required as pdfcpu does not release an armhf variant by
+# default.
+
+FROM golang:$GOLANG_VERSION AS pdfcpu-binary-stage
+
+ARG PDFCPU_VERSION
+ENV CGO_ENABLED=0
+
+# Define the working directory outside of $GOPATH (we're using go modules).
+WORKDIR /home
+
+RUN curl -Ls "https://github.com/pdfcpu/pdfcpu/archive/refs/tags/$PDFCPU_VERSION.tar.gz" -o pdfcpu.tar.gz &&\
+    tar --strip-components=1 -xvzf pdfcpu.tar.gz
+
+# Install module dependencies.
+RUN go mod download &&\
+    go mod verify
+
+RUN go build -o pdfcpu -ldflags "-s -w -X 'main.version=$PDFCPU_VERSION' -X 'github.com/pdfcpu/pdfcpu/pkg/pdfcpu.VersionStr=$PDFCPU_VERSION' -X main.builtBy=gotenberg" ./cmd/pdfcpu &&\
+    # Verify installation.
+    ./pdfcpu version
 
 # ----------------------------------------------
 # Gotenberg binary build stage
 # ----------------------------------------------
-FROM golang:$GOLANG_VERSION AS binary-stage
+FROM golang:$GOLANG_VERSION AS gotenberg-binary-stage
 
 ARG GOTENBERG_VERSION
-ENV CGO_ENABLED 0
+ENV CGO_ENABLED=0
 
 # Define the working directory outside of $GOPATH (we're using go modules).
 WORKDIR /home
@@ -25,7 +49,7 @@ RUN go mod download &&\
 COPY cmd ./cmd
 COPY pkg ./pkg
 
-RUN go build -o gotenberg -ldflags "-X 'github.com/gotenberg/gotenberg/v7/cmd.Version=$GOTENBERG_VERSION'" cmd/gotenberg/main.go
+RUN go build -o gotenberg -ldflags "-X 'github.com/gotenberg/gotenberg/v8/cmd.Version=$GOTENBERG_VERSION'" cmd/gotenberg/main.go
 
 # ----------------------------------------------
 # Final stage
@@ -37,7 +61,6 @@ ARG GOTENBERG_USER_GID
 ARG GOTENBERG_USER_UID
 ARG NOTO_COLOR_EMOJI_VERSION
 ARG PDFTK_VERSION
-ARG TMP_CHOMIUM_VERSION_ARMHF="116.0.5845.180-1~deb12u1"
 
 LABEL org.opencontainers.image.title="Gotenberg" \
       org.opencontainers.image.description="A Docker-powered stateless API for PDF files." \
@@ -58,6 +81,7 @@ RUN \
     # Install system dependencies required for the next instructions or debugging.
     # Note: tini is a helper for reaping zombie processes.
     apt-get update -qq &&\
+    apt-get upgrade -yqq &&\
     DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends curl gnupg tini python3 default-jre-headless &&\
     # Cleanup.
     # Note: the Debian image does automatically a clean after each install thanks to a hook.
@@ -72,6 +96,7 @@ RUN \
     # https://help.accusoft.com/PrizmDoc/v12.1/HTML/Installing_Asian_Fonts_on_Ubuntu_and_Debian.html.
     curl -o ./ttf-mscorefonts-installer_3.8.1_all.deb http://httpredir.debian.org/debian/pool/contrib/m/msttcorefonts/ttf-mscorefonts-installer_3.8.1_all.deb &&\
     apt-get update -qq &&\
+    apt-get upgrade -yqq &&\
     DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends \
     ./ttf-mscorefonts-installer_3.8.1_all.deb \
     culmus \
@@ -121,22 +146,18 @@ RUN \
     # Install either Google Chrome stable on amd64 architecture or
     # Chromium on other architectures.
     # See https://github.com/gotenberg/gotenberg/issues/328.
-    # FIXME:
-    # armhf is currently not working with the latest version of Chromium.
-    # See: https://github.com/gotenberg/gotenberg/issues/709.
     /bin/bash -c \
     'set -e &&\
     if [[ "$(dpkg --print-architecture)" == "amd64" ]]; then \
       curl https://dl.google.com/linux/linux_signing_key.pub | apt-key add - &&\
       echo "deb http://dl.google.com/linux/chrome/deb/ stable main" | tee /etc/apt/sources.list.d/google-chrome.list &&\
       apt-get update -qq &&\
+      apt-get upgrade -yqq &&\
       DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends --allow-unauthenticated google-chrome-stable &&\
       mv /usr/bin/google-chrome-stable /usr/bin/chromium; \
-    elif [[ "$(dpkg --print-architecture)" == "armhf" ]]; then \
-      apt-get update -qq &&\
-      DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends chromium-common="$TMP_CHOMIUM_VERSION_ARMHF" chromium="$TMP_CHOMIUM_VERSION_ARMHF"; \
     else \
       apt-get update -qq &&\
+      apt-get upgrade -yqq &&\
       DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends chromium; \
     fi' &&\
     # Verify installation.
@@ -148,6 +169,7 @@ RUN \
     # Install LibreOffice & unoconverter.
     echo "deb http://deb.debian.org/debian bookworm-backports main" >> /etc/apt/sources.list &&\
     apt-get update -qq &&\
+    apt-get upgrade -yqq &&\
     DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends -t bookworm-backports libreoffice &&\
     curl -Ls https://raw.githubusercontent.com/gotenberg/unoconverter/v0.0.1/unoconv -o /usr/bin/unoconverter &&\
     chmod +x /usr/bin/unoconverter &&\
@@ -160,19 +182,21 @@ RUN \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN \
-    # Install PDFtk & QPDF (PDF engines).
+    # Install PDFtk, QPDF & ExifTool (PDF engines).
     # See https://github.com/gotenberg/gotenberg/pull/273.
     curl -o /usr/bin/pdftk-all.jar "https://gitlab.com/api/v4/projects/5024297/packages/generic/pdftk-java/$PDFTK_VERSION/pdftk-all.jar" &&\
     chmod a+x /usr/bin/pdftk-all.jar &&\
     echo '#!/bin/bash\n\nexec java -jar /usr/bin/pdftk-all.jar "$@"' > /usr/bin/pdftk && \
     chmod +x /usr/bin/pdftk &&\
     apt-get update -qq &&\
-    DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends qpdf &&\
+    apt-get upgrade -yqq &&\
+    DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends qpdf exiftool &&\
     # See https://github.com/nextcloud/docker/issues/380.
     mkdir -p /usr/share/man/man1 &&\
     # Verify installations.
     pdftk --version &&\
     qpdf --version &&\
+    exiftool --version &&\
     # Cleanup.
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
@@ -182,15 +206,20 @@ RUN \
 # https://github.com/arachnys/athenapdf/commit/ba25a8d80a25d08d58865519c4cd8756dc9a336d.
 COPY build/fonts.conf /etc/fonts/conf.d/100-gotenberg.conf
 
-# Copy the Gotenberg binary from the binary stage.
-COPY --from=binary-stage /home/gotenberg /usr/bin/
+# Copy the pdfcpu binary from the pdfcpu-binary-stage.
+COPY --from=pdfcpu-binary-stage /home/pdfcpu /usr/bin/
+
+# Copy the Gotenberg binary from the gotenberg-binary-stage.
+COPY --from=gotenberg-binary-stage /home/gotenberg /usr/bin/
 
 # Environment variables required by modules or else.
-ENV CHROMIUM_BIN_PATH /usr/bin/chromium
-ENV LIBREOFFICE_BIN_PATH /usr/lib/libreoffice/program/soffice.bin
-ENV UNOCONVERTER_BIN_PATH /usr/bin/unoconverter
-ENV PDFTK_BIN_PATH /usr/bin/pdftk
-ENV QPDF_BIN_PATH /usr/bin/qpdf
+ENV CHROMIUM_BIN_PATH=/usr/bin/chromium
+ENV LIBREOFFICE_BIN_PATH=/usr/lib/libreoffice/program/soffice.bin
+ENV UNOCONVERTER_BIN_PATH=/usr/bin/unoconverter
+ENV PDFTK_BIN_PATH=/usr/bin/pdftk
+ENV QPDF_BIN_PATH=/usr/bin/qpdf
+ENV EXIFTOOL_BIN_PATH=/usr/bin/exiftool
+ENV PDFCPU_BIN_PATH=/usr/bin/pdfcpu
 
 USER gotenberg
 WORKDIR /home/gotenberg

build/Dockerfile.cloudrun

@@ -1,7 +1,8 @@
+ARG DOCKER_REGISTRY
 ARG DOCKER_REPOSITORY
 ARG GOTENBERG_VERSION
 
-FROM $DOCKER_REPOSITORY/gotenberg:$GOTENBERG_VERSION
+FROM $DOCKER_REGISTRY/$DOCKER_REPOSITORY:$GOTENBERG_VERSION
 
 USER root
 

cmd/gotenberg.go

@@ -11,7 +11,7 @@ import (
 	flag "github.com/spf13/pflag"
 	"golang.org/x/sync/errgroup"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 // See https://patorjk.com/software/taag/#p=display&f=Small%20Slant&t=Gotenberg.
@@ -35,6 +35,7 @@ var Version = "snapshot"
 // Run starts the Gotenberg application. Call this in the main of your program.
 func Run() {
 	fmt.Printf(banner, Version)
+	gotenberg.Version = Version
 
 	// Create the root FlagSet and adds the modules flags to it.
 	fs := flag.NewFlagSet("gotenberg", flag.ExitOnError)
@@ -75,7 +76,6 @@ func Run() {
 		go func(app gotenberg.App) {
 			id := app.(gotenberg.Module).Descriptor().ID
 			err = app.Start()
-
 			if err != nil {
 				fmt.Printf("[FATAL] starting %s: %s\n", id, err)
 				os.Exit(1)
@@ -84,7 +84,6 @@ func Run() {
 			startupMessage := app.StartupMessage()
 			if startupMessage == "" {
 				fmt.Printf("[SYSTEM] %s: application started\n", id)
-
 				return
 			}
 
@@ -144,7 +143,6 @@ func Run() {
 				}
 
 				fmt.Printf("[SYSTEM] %s: application stopped\n", id)
-
 				return nil
 			}
 		}(a.(gotenberg.App)))

cmd/gotenberg/main.go

@@ -1,9 +1,9 @@
 package main
 
 import (
-	gotenbergcmd "github.com/gotenberg/gotenberg/v7/cmd"
+	gotenbergcmd "github.com/gotenberg/gotenberg/v8/cmd"
 	// Gotenberg modules.
-	_ "github.com/gotenberg/gotenberg/v7/pkg/standard"
+	_ "github.com/gotenberg/gotenberg/v8/pkg/standard"
 )
 
 func main() {

docs/openapi.yaml

@@ -1,744 +0,0 @@
-openapi: 3.0.3
-info:
-  title: Gotenberg
-  version: 7.x
-  license:
-    name: MIT
-    url: 'https://github.com/gotenberg/gotenberg/blob/main/LICENSE'
-  contact:
-    url: 'https://github.com/gotenberg/gotenberg'
-  description: >-
-    A Docker-powered stateless API for PDF files.
-externalDocs:
-  url: https://gotenberg.dev
-servers:
-  - url: 'http://localhost:3000'
-    description: Local server with the default Docker image and port
-tags:
-  - name: chromium
-    description: Operations of the Chromium module
-    externalDocs:
-      url: https://gotenberg.dev/docs/modules/chromium
-  - name: libreoffice
-    description: Operations of the Libreoffice module
-    externalDocs:
-      url: https://gotenberg.dev/docs/modules/libreoffice
-  - name: pdfengines
-    description: Operations of the PDF Engines module
-    externalDocs:
-      url: https://gotenberg.dev/docs/modules/pdf-engines
-paths:
-  /forms/chromium/convert/url:
-    post:
-      tags:
-        - chromium
-      summary: Convert the contents of a given URL to PDF
-      externalDocs:
-        url: https://gotenberg.dev/docs/modules/chromium
-      description: >-
-        Send a URL in your API request via the `url` form field
-        Send a remote URL in your API request via the `remoteURL` parameter, and
-        get the resulting PDF file. The API will fetch the given URL and render
-        the page to PDF using the underlying headless Chrome instance.
-        You can optionally include `header.html` and `footer.html` files as part of the request as well.
-        See externalDocs for more details.
-      parameters:
-        - in: header
-          name: Gotenberg-Output-Filename
-          description: >-
-            By default, the API generates a UUID filename.
-            However, you may also specify the filename per request,
-            thanks to the Gotenberg-Output-Filename header.
-            Caution! The API adds the file extension automatically; you don't have to set it.
-          schema:
-            type: string
-          required: false
-        - in: header
-          name: Gotenberg-Trace
-          description: >-
-            The trace, or request ID, identifies a request in the logs.
-
-            By default, the API generates a UUID trace for each request.
-            However, you may also specify the trace per request, thanks to the Gotenberg-Trace header.
-          schema:
-            type: string
-          required: false
-      requestBody:
-        required: true
-        description: >-
-          The request must be  `multipart/form-data` that includes a `url` form field.
-          The API uses a headless Chrome instance to do the conversion, therefore print
-          parameter such as margins and paper size are also accepted as optional parameters.
-        content:
-          multipart/form-data:
-            schema:
-              $ref: '#/components/schemas/URLConvertRequestBody'
-            examples: { }
-      responses:
-        '200':
-          $ref: '#/components/responses/SuccessfulPDF'
-        '400':
-          description: Bad Request
-        '503':
-          $ref: '#/components/responses/Timeout'
-
-  /forms/chromium/convert/html:
-    post:
-      tags:
-        - chromium
-      summary: Convert a given HTML file to PDF
-      externalDocs:
-        url: https://gotenberg.dev/docs/modules/chromium
-      description: >-
-        Send an HTML file called `index.html` as a multipart form request, and
-        get the resulting PDF file. You can optionally include `header.html` and
-        `footer.html` files as part of the request as well.
-        See externalDocs for more details.
-      parameters:
-        - in: header
-          name: Gotenberg-Output-Filename
-          description: >-
-            By default, the API generates a UUID filename.
-            However, you may also specify the filename per request,
-            thanks to the Gotenberg-Output-Filename header.
-            Caution! The API adds the file extension automatically; you don't have to set it.
-          schema:
-            type: string
-          required: false
-        - in: header
-          name: Gotenberg-Trace
-          description: >-
-            The trace, or request ID, identifies a request in the logs.
-
-            By default, the API generates a UUID trace for each request.
-            However, you may also specify the trace per request, thanks to the Gotenberg-Trace header.
-          schema:
-            type: string
-          required: false
-      requestBody:
-        content:
-          multipart/form-data:
-            schema:
-              $ref: '#/components/schemas/HTMLConvertRequestBody'
-        description: >-
-          The request body must have an `index.html` file in the `files` array,
-          as well as all the referred resources on the same level as the
-          `index.html` file. The request can also include `header.html` and
-          `footer.html`, given the limitations in the API description above.
-      responses:
-        '200':
-          $ref: '#/components/responses/SuccessfulPDF'
-        '400':
-          description: Bad Request
-        '503':
-          $ref: '#/components/responses/Timeout'
-
-  /forms/chromium/convert/markdown:
-    post:
-      tags:
-        - chromium
-      summary: Convert a Markdown file to PDF
-      externalDocs:
-        url: https://gotenberg.dev/docs/modules/chromium
-      description: >-
-        Accepts an HTML file called `index.html` plus markdown files as a multipart
-        form request and embeds the markdown files into the HTML file using the Golang template
-        function `toHTML`.
-        The API will convert the markdown to HTML and embed it into your `index.html` file,
-        then render the resulting page. You can include your own styling and more in your HTML file.
-        Refer to the HTML conversion page for all the options you can use when converting
-        Markdown documents as well. You can optionally include `header.html` and
-        `footer.html` files as part of the request as well.
-        See externalDocs for more details.
-      parameters:
-        - in: header
-          name: Gotenberg-Output-Filename
-          description: >-
-            By default, the API generates a UUID filename.
-            However, you may also specify the filename per request,
-            thanks to the Gotenberg-Output-Filename header.
-            Caution! The API adds the file extension automatically; you don't have to set it.
-          schema:
-            type: string
-          required: false
-        - in: header
-          name: Gotenberg-Trace
-          description: >-
-            The trace, or request ID, identifies a request in the logs.
-
-            By default, the API generates a UUID trace for each request.
-            However, you may also specify the trace per request, thanks to the Gotenberg-Trace header.
-          schema:
-            type: string
-          required: false
-      requestBody:
-        content:
-          multipart/form-data:
-            schema:
-              $ref: '#/components/schemas/MarkdownConvertRequestBody'
-        description: >-
-          The request body must have an `index.html` file in the `files` array,
-          as well as all the referred markdown resources on the same level as
-          the `index.html` file.
-      responses:
-        '200':
-          $ref: '#/components/responses/SuccessfulPDF'
-        '400':
-          description: Bad Request
-        '503':
-          $ref: '#/components/responses/Timeout'
-
-  /forms/libreoffice/convert:
-    post:
-      tags:
-        - libreoffice
-      summary: Convert an Office document to PDF
-      externalDocs:
-        url: https://gotenberg.dev/docs/modules/libreoffice
-      description: >-
-        This route accepts multipart/form-data requests and files with the following extensions:
-
-        .bib  .doc  .xml  .docx  .fodt  .html  .ltx  .txt  .odt  .ott  .pdb  .pdf  .psw  .rtf
-        .sdw  .stw  .sxw  .uot  .vor  .wps  .epub  .png  .bmp  .emf  .eps  .fodg  .gif  .jpg
-        .met  .odd  .otg  .pbm  .pct  .pgm  .ppm  .ras  .std  .svg  .svm  .swf  .sxd  .sxw
-        .tiff  .xhtml  .xpm  .fodp  .potm  .pot  .pptx  .pps  .ppt  .pwp  .sda  .sdd  .sti
-        .sxi  .uop  .wmf  .csv  .dbf  .dif  .fods  .ods  .ots  .pxl  .sdc  .slk  .stc  .sxc
-        .uos  .xls  .xlt  .xlsx  .tif  .jpeg  .odp
-
-        By default, if you send more than one file to convert, the route returns a ZIP archive of the
-        resulting PDF files. However, you may prefer to merge all the PDF files into an individual PDF file.
-
-        > **Attention:** The files will be merged alphabetically for the
-        resulting PDF.
-
-        You may also specify the page ranges to convert from the incoming Office
-        documents. The expected format is the same as the one from the print
-        options of LibreOffice, e.g. `1-1` or `1-4`.
-
-        > **Attention:** if more than one document, the page ranges will be
-        applied for each document.
-
-        See externalDocs for more details.
-      parameters:
-        - in: header
-          name: Gotenberg-Output-Filename
-          description: >-
-            By default, the API generates a UUID filename.
-            However, you may also specify the filename per request,
-            thanks to the Gotenberg-Output-Filename header.
-            Caution! The API adds the file extension automatically; you don't have to set it.
-          schema:
-            type: string
-          required: false
-        - in: header
-          name: Gotenberg-Trace
-          description: >-
-            The trace, or request ID, identifies a request in the logs.
-
-            By default, the API generates a UUID trace for each request.
-            However, you may also specify the trace per request, thanks to the Gotenberg-Trace header.
-          schema:
-            type: string
-          required: false
-      requestBody:
-        content:
-          multipart/form-data:
-            schema:
-              $ref: '#/components/schemas/OfficeConvertRequestBody'
-      responses:
-        '200':
-          $ref: '#/components/responses/SuccessfulPDF'
-        '400':
-          description: Bad Request, e.g. Both 'pdfFormat' and 'nativePdfA1aFormat' form values are provided
-        '503':
-          $ref: '#/components/responses/Timeout'
-
-  /forms/pdfengines/merge:
-    post:
-      tags:
-        - pdfengines
-      summary: Merge multiple PDFs into a single PDF
-      externalDocs:
-        url: https://gotenberg.dev/docs/modules/pdf-engines
-      description: >-
-        You can send multiple PDF files to this endpoint, the API will merge
-        them into a single PDF and return the resulting PDF file.
-
-        > **Attention:** The PDF files will be merged alphabetically.
-      parameters:
-        - in: header
-          name: Gotenberg-Output-Filename
-          description: >-
-            By default, the API generates a UUID filename.
-            However, you may also specify the filename per request,
-            thanks to the Gotenberg-Output-Filename header.
-            Caution! The API adds the file extension automatically; you don't have to set it.
-          schema:
-            type: string
-          required: false
-        - in: header
-          name: Gotenberg-Trace
-          description: >-
-            The trace, or request ID, identifies a request in the logs.
-
-            By default, the API generates a UUID trace for each request.
-            However, you may also specify the trace per request, thanks to the Gotenberg-Trace header.
-          schema:
-            type: string
-          required: false
-      requestBody:
-        content:
-          multipart/form-data:
-            schema:
-              type: object
-              properties:
-                files:
-                  type: array
-                  items:
-                    type: string
-                    format: binary
-                pdfFormat:
-                  type: string
-                  description: The PDF format of the resulting PDF
-                  example: PDF/A-1a
-              required:
-                - files
-      responses:
-        '200':
-          $ref: '#/components/responses/SuccessfulPDF'
-        '400':
-          description: Bad Request
-        '503':
-          $ref: '#/components/responses/Timeout'
-
-  /forms/pdfengines/convert:
-    post:
-      tags:
-        - pdfengines
-      summary: Convert PDFs into the given formats
-      externalDocs:
-        url: https://gotenberg.dev/docs/modules/pdf-engines
-      description: >-
-        This route accepts PDF files and a form field pdfFormat for converting them into the specified format.
-      parameters:
-        - in: header
-          name: Gotenberg-Output-Filename
-          description: >-
-            By default, the API generates a UUID filename.
-            However, you may also specify the filename per request,
-            thanks to the Gotenberg-Output-Filename header.
-            Caution! The API adds the file extension automatically; you don't have to set it.
-          schema:
-            type: string
-          required: false
-        - in: header
-          name: Gotenberg-Trace
-          description: >-
-            The trace, or request ID, identifies a request in the logs.
-
-            By default, the API generates a UUID trace for each request.
-            However, you may also specify the trace per request, thanks to the Gotenberg-Trace header.
-          schema:
-            type: string
-          required: false
-      requestBody:
-        content:
-          multipart/form-data:
-            schema:
-              type: object
-              properties:
-                files:
-                  type: array
-                  items:
-                    type: string
-                    format: binary
-                pdfFormat:
-                  type: string
-                  description: The PDF format of the resulting PDF
-                  example: PDF/A-1a
-              required:
-                - files
-                - pdfFormat
-      responses:
-        '200':
-          $ref: '#/components/responses/SuccessfulPDF'
-        '400':
-          description: >-
-            Bad Request, e.g. Invalid form data: no form file found for extensions: [.pdf]; form value 'pdfFormat' is required
-        '503':
-          $ref: '#/components/responses/Timeout'
-
-components:
-  schemas:
-    HTMLConvertRequestBody:
-      title: HTML Conversion Request Body
-      type: object
-      properties:
-        files:
-          type: array
-          description: >-
-            List of HTML files to be converted to PDF. An `index.html` file is
-            required, and any other resources that are referenced through the
-            HTML file must be included as well. All the referenced files must be
-            on the same level as the `index.html` file.
-          items:
-            type: string
-            format: binary
-        marginTop:
-          type: number
-          example: 0
-          default: 1
-          description: Top margin for the page in inches.
-        marginBottom:
-          type: number
-          example: 0
-          default: 1
-          description: Bottom margin for the page in inches.
-        marginLeft:
-          type: number
-          example: 0
-          default: 1
-          description: Left margin for the page in inches.
-        marginRight:
-          type: number
-          example: 0
-          default: 1
-          description: Right margin for the page in inches.
-        paperWidth:
-          type: number
-          example: 8.27
-          description: >-
-            Paper width to be used while rendering the PDF. The default page
-            size is A4.
-        paperHeight:
-          type: number
-          example: 11.69
-          description: >-
-            Paper height to be used while rendering the PDF. The default page
-            size is A4.
-        preferCssPageSize:
-          type: boolean
-          description: >-
-            Define whether to prefer page size as defined by CSS (default false)
-          default: false
-        printBackground:
-          type: boolean
-          description: >-
-            Print the background graphics (default false)
-          default: false
-        landscape:
-          type: boolean
-          example: true
-          default: false
-          description: >-
-            The default orientation for rendering the page is "portrait" mode.
-            By sending "landscape" parameter, you can ask the output to be
-            landscape.
-        scale:
-          type: number
-          minimum: 0.1
-          maximum: 2.0
-          example: 1.5
-          description: >-
-            The scale of the page rendering
-          default: 1.0
-        waitDelay:
-          type: string
-          example: 5s
-          description: >-
-            When the page relies on JavaScript for rendering, and you don't have access to the page's code,
-            you may want to wait a certain amount of time to make sure Chromium has fully rendered the page
-            you're trying to generate.
-        waitWindowStatus:
-          type: string
-          example: done
-          description: >-
-            If you have access to the page's code, you may set the window status and tell Gotenberg to wait for a specific value.
-            For instance
-               await promises()
-               window.status = 'ready'
-            Prefer this option over waitDelay.
-        extraHttpHeaders:
-          type: string
-          description: HTTP headers to send by Chromium while loading the HTML document (JSON format)
-        nativePageRanges:
-          type: string
-          example: 1-4
-          description: >-
-            The page ranges to be converted to PDF for the incoming Office
-            documents.
-        pdfFormat:
-          type: string
-          description: >-
-            The PDF format of the resulting PDF.
-            Caution! You cannot use both nativePdfA1aFormat and pdfFormat form fields.
-          example: PDF/A-1a
-      required:
-        - files
-    MarkdownConvertRequestBody:
-      title: Markdown Conversion Request Body
-      type: object
-      properties:
-        files:
-          type: array
-          items:
-            type: string
-            format: binary
-        marginTop:
-          type: number
-          example: 0
-          default: 1
-          description: Top margin for the page in inches.
-        marginBottom:
-          type: number
-          example: 0
-          default: 1
-          description: Bottom margin for the page in inches.
-        marginLeft:
-          type: number
-          example: 0
-          default: 1
-          description: Left margin for the page in inches.
-        marginRight:
-          type: number
-          example: 0
-          default: 1
-          description: Right margin for the page in inches.
-        paperWidth:
-          type: number
-          example: 8.27
-          description: >-
-            Paper width to be used while rendering the PDF. The default page
-            size is A4.
-        paperHeight:
-          type: number
-          example: 11.69
-          description: >-
-            Paper height to be used while rendering the PDF. The default page
-            size is A4.
-        preferCssPageSize:
-          type: boolean
-          description: >-
-            Define whether to prefer page size as defined by CSS (default false)
-          default: false
-        printBackground:
-          type: boolean
-          description: >-
-            Print the background graphics (default false)
-          default: false
-        landscape:
-          type: boolean
-          example: true
-          default: false
-          description: >-
-            The default orientation for rendering the page is "portrait" mode.
-            By sending "landscape" parameter, you can ask the output to be
-            landscape.
-        scale:
-          type: number
-          minimum: 0.1
-          maximum: 2.0
-          example: 1.5
-          description: >-
-            The scale of the page rendering
-          default: 1.0
-        waitDelay:
-          type: string
-          example: 5s
-          description: >-
-            When the page relies on JavaScript for rendering, and you don't have access to the page's code,
-            you may want to wait a certain amount of time to make sure Chromium has fully rendered the page
-            you're trying to generate.
-        waitWindowStatus:
-          type: string
-          example: done
-          description: >-
-            If you have access to the page's code, you may set the window status and tell Gotenberg to wait for a specific value.
-            For instance
-               await promises()
-               window.status = 'ready'
-            Prefer this option over waitDelay.
-        extraHttpHeaders:
-          type: string
-          description: HTTP headers to send by Chromium while loading the HTML document (JSON format)
-        nativePageRanges:
-          type: string
-          example: 1-4
-          description: >-
-            The page ranges to be converted to PDF for the incoming Office
-            documents.
-        pdfFormat:
-          type: string
-          description: >-
-            The PDF format of the resulting PDF.
-            Caution! You cannot use both nativePdfA1aFormat and pdfFormat form fields.
-          example: PDF/A-1a
-      required:
-        - files
-    URLConvertRequestBody:
-      title: URL Conversion Request Body
-      type: object
-      properties:
-        url:
-          type: string
-          example: 'https://google.com'
-        files:
-          description: Optional files named header.html and footer.html
-          type: array
-          items:
-            type: string
-            format: binary
-        marginTop:
-          type: number
-          example: 0
-          default: 1
-          description: Top margin for the page in inches.
-        marginBottom:
-          type: number
-          example: 0
-          default: 1
-          description: Bottom margin for the page in inches.
-        marginLeft:
-          type: number
-          example: 0
-          default: 1
-          description: Left margin for the page in inches.
-        marginRight:
-          type: number
-          example: 0
-          default: 1
-          description: Right margin for the page in inches.
-        paperWidth:
-          type: number
-          example: 8.27
-          description: >-
-            Paper width to be used while rendering the PDF. The default page
-            size is A4.
-        paperHeight:
-          type: number
-          example: 11.69
-          description: >-
-            Paper height to be used while rendering the PDF. The default page
-            size is A4.
-        preferCssPageSize:
-          type: boolean
-          description: >-
-            Define whether to prefer page size as defined by CSS (default false)
-          default: false
-        printBackground:
-          type: boolean
-          description: >-
-            Print the background graphics (default false)
-          default: false
-        landscape:
-          type: boolean
-          example: true
-          default: false
-          description: >-
-            The default orientation for rendering the page is "portrait" mode.
-            By sending "landscape" parameter, you can ask the output to be
-            landscape.
-        scale:
-          type: number
-          minimum: 0.1
-          maximum: 2.0
-          example: 1.5
-          description: >-
-            The scale of the page rendering
-          default: 1.0
-        waitDelay:
-          type: string
-          example: 5s
-          description: >-
-            When the page relies on JavaScript for rendering, and you don't have access to the page's code,
-            you may want to wait a certain amount of time to make sure Chromium has fully rendered the page
-            you're trying to generate.
-        waitWindowStatus:
-          type: string
-          example: done
-          description: >-
-            If you have access to the page's code, you may set the window status and tell Gotenberg to wait for a specific value.
-            For instance
-               await promises()
-               window.status = 'ready'
-            Prefer this option over waitDelay.
-        extraHttpHeaders:
-          type: string
-          description: HTTP headers to send by Chromium while loading the HTML document (JSON format)
-        nativePageRanges:
-          type: string
-          example: 1-4
-          description: >-
-            The page ranges to be converted to PDF for the incoming Office
-            documents.
-        pdfFormat:
-          type: string
-          description: >-
-            The PDF format of the resulting PDF.
-            Caution! You cannot use both nativePdfA1aFormat and pdfFormat form fields.
-          example: PDF/A-1a
-      required:
-        - url
-    OfficeConvertRequestBody:
-      title: Office Conversion Request Body
-      type: object
-      properties:
-        files:
-          type: array
-          items:
-            type: string
-            format: binary
-        nativePageRanges:
-          type: string
-          example: 1-4
-          description: >-
-            The page ranges to be converted to PDF for the incoming Office
-            documents. **If there are multiple files sent to the API, this page
-            range will apply to all of the documents**. Empty means all pages.
-        nativePdfA1aFormat:
-          type: boolean
-          description: >-
-            Use unoconv to convert the resulting PDF to the 'PDF/A-1a' format.
-            Caution! You cannot use both nativePdfA1aFormat and pdfFormat form fields.
-        pdfFormat:
-          type: string
-          description: >-
-            The PDF format of the resulting PDF.
-            Caution! You cannot use both nativePdfA1aFormat and pdfFormat form fields.
-          example: PDF/A-1a
-        landscape:
-          type: boolean
-          example: true
-          default: false
-          description: >-
-            The default orientation for rendering the page is "portrait" mode.
-            By sending "landscape" parameter, you can ask the output to be
-            landscape.
-        merge:
-          type: boolean
-          description: >-
-            Merge all PDF files into an individual PDF file.
-      required:
-        - files
-    MergeFilesRequestBody:
-      title: Merge Files Request Body
-      type: object
-      properties:
-        files:
-          type: array
-          items:
-            type: string
-            format: binary
-      required:
-        - files
-  securitySchemes: { }
-  responses:
-    SuccessfulPDF:
-      description: Resulting PDF file from the conversion.
-      content:
-        application/pdf:
-          schema:
-            type: string
-            format: binary
-    Timeout:
-      description: Service Unavailable

go.mod

@@ -1,66 +1,72 @@
-module github.com/gotenberg/gotenberg/v7
+module github.com/gotenberg/gotenberg/v8
 
-go 1.21
+go 1.23.0
 
 require (
 	github.com/alexliesenfeld/health v0.8.0
-	github.com/andybalholm/brotli v1.0.6 // indirect
-	github.com/chromedp/cdproto v0.0.0-20231114014204-3e458d5176f9
-	github.com/chromedp/chromedp v0.9.3
+	github.com/andybalholm/brotli v1.1.1 // indirect
+	github.com/barasher/go-exiftool v1.10.0
+	github.com/chromedp/cdproto v0.0.0-20250126231910-1730200a0f74
+	github.com/chromedp/chromedp v0.12.1
 	github.com/golang/snappy v0.0.4 // indirect
-	github.com/google/uuid v1.4.0
+	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-retryablehttp v0.7.5
-	github.com/klauspost/compress v1.17.3 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.7
+	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
-	github.com/labstack/echo/v4 v4.11.3
-	github.com/labstack/gommon v0.4.1
+	github.com/labstack/echo/v4 v4.13.3
+	github.com/labstack/gommon v0.4.2
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mholt/archiver/v3 v3.5.1
-	github.com/microcosm-cc/bluemonday v1.0.26
+	github.com/microcosm-cc/bluemonday v1.0.27
 	github.com/nwaples/rardecode v1.1.3 // indirect
-	github.com/pdfcpu/pdfcpu v0.5.0
-	github.com/pierrec/lz4/v4 v4.1.18 // indirect
-	github.com/prometheus/client_golang v1.17.0
+	github.com/pierrec/lz4/v4 v4.1.22 // indirect
+	github.com/prometheus/client_golang v1.20.5
 	github.com/russross/blackfriday/v2 v2.1.0
-	github.com/spf13/pflag v1.0.5
-	github.com/ulikunitz/xz v0.5.11 // indirect
+	github.com/spf13/pflag v1.0.6
+	github.com/ulikunitz/xz v0.5.12 // indirect
 	go.uber.org/multierr v1.11.0
-	go.uber.org/zap v1.26.0
-	golang.org/x/crypto v0.15.0 // indirect
-	golang.org/x/image v0.14.0 // indirect
-	golang.org/x/net v0.18.0
-	golang.org/x/sync v0.5.0
-	golang.org/x/sys v0.14.0 // indirect
-	golang.org/x/term v0.14.0
-	golang.org/x/text v0.14.0
+	go.uber.org/zap v1.27.0
+	golang.org/x/crypto v0.32.0 // indirect
+	golang.org/x/net v0.34.0
+	golang.org/x/sync v0.10.0
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/term v0.28.0
+	golang.org/x/text v0.21.0
+)
+
+require (
+	github.com/dlclark/regexp2 v1.11.4
+	github.com/shirou/gopsutil/v4 v4.24.12
 )
 
 require (
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/chromedp/sysutil v1.0.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/chromedp/sysutil v1.1.0 // indirect
 	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
+	github.com/ebitengine/purego v0.8.2 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
-	github.com/gobwas/ws v1.3.1 // indirect
+	github.com/gobwas/ws v1.4.0 // indirect
 	github.com/gorilla/css v1.0.1 // indirect
-	github.com/hhrutter/lzw v1.0.0 // indirect
-	github.com/hhrutter/tiff v1.0.1 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
-	github.com/mailru/easyjson v0.7.7 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-runewidth v0.0.15 // indirect
-	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	github.com/prometheus/client_model v0.5.0 // indirect
-	github.com/prometheus/common v0.45.0 // indirect
-	github.com/prometheus/procfs v0.12.0 // indirect
-	github.com/rivo/uniseg v0.4.4 // indirect
+	github.com/lufia/plan9stats v0.0.0-20240909124753-873cd0166683 // indirect
+	github.com/mailru/easyjson v0.9.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/common v0.62.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/tklauser/go-sysconf v0.3.14 // indirect
+	github.com/tklauser/numcpus v0.9.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasttemplate v1.2.2 // indirect
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
-	google.golang.org/protobuf v1.31.0 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	golang.org/x/time v0.9.0 // indirect
+	google.golang.org/protobuf v1.36.4 // indirect
 )

go.sum

@@ -1,165 +1,167 @@
 github.com/alexliesenfeld/health v0.8.0 h1:lCV0i+ZJPTbqP7LfKG7p3qZBl5VhelwUFCIVWl77fgk=
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 github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
-github.com/andybalholm/brotli v1.0.6 h1:Yf9fFpf49Zrxb9NlQaluyE92/+X7UVHlhMNJN2sxfOI=
-github.com/andybalholm/brotli v1.0.6/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
+github.com/andybalholm/brotli v1.1.1 h1:PR2pgnyFznKEugtsUo0xLdDop5SKXd5Qf5ysW+7XdTA=
+github.com/andybalholm/brotli v1.1.1/go.mod h1:05ib4cKhjx3OQYUY22hTVd34Bc8upXjOLL2rKwwZBoA=
 github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
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 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+google.golang.org/protobuf v1.36.4 h1:6A3ZDJHn/eNqc1i+IdefRzy/9PokBTPvcqMySR7NNIM=
+google.golang.org/protobuf v1.36.4/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/gotenberg/cmd.go

@@ -156,7 +156,7 @@ func (cmd *Cmd) pipeOutput() error {
 		r := bufio.NewReader(reader)
 		defer func(reader io.ReadCloser) {
 			err := reader.Close()
-			if err != nil {
+			if err != nil && !strings.Contains(err.Error(), "file already closed") {
 				logger.Error(fmt.Sprintf("close reader: %s", err))
 			}
 		}(reader)

pkg/gotenberg/cmd_test.go

@@ -104,19 +104,8 @@ func TestCmd_Wait(t *testing.T) {
 			expectWaitError: false,
 		},
 		{
-			scenario: "wait error",
-			cmd: func() *Cmd {
-				cmd := Command(zap.NewNop(), "echo", "Hello", "World")
-				err := cmd.Start()
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-				err = cmd.Kill()
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-				return cmd
-			}(),
+			scenario:        "wait error",
+			cmd:             Command(zap.NewNop(), "echo", "Hello", "World"),
 			expectWaitError: true,
 		},
 	}

pkg/gotenberg/env.go

@@ -0,0 +1,35 @@
+package gotenberg
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+// StringEnv retrieves the value of the environment variable named by the key.
+// If the variable is present in the environment and not empty, the value is
+// returned.
+func StringEnv(key string) (string, error) {
+	val, ok := os.LookupEnv(key)
+	if !ok {
+		return "", fmt.Errorf("environment variable '%s' does not exist", key)
+	}
+	if val == "" {
+		return "", fmt.Errorf("environment variable '%s' is empty", key)
+	}
+	return val, nil
+}
+
+// IntEnv relies on [StringEnv] and converts the values if it exists and is not
+// empty.
+func IntEnv(key string) (int, error) {
+	val, err := StringEnv(key)
+	if err != nil {
+		return 0, err
+	}
+	intVal, err := strconv.Atoi(val)
+	if err != nil {
+		return 0, fmt.Errorf("get int value of environment variable '%s': %w", key, err)
+	}
+	return intVal, nil
+}

pkg/gotenberg/env_test.go

@@ -0,0 +1,134 @@
+package gotenberg
+
+import (
+	"os"
+	"testing"
+)
+
+func TestStringEnv(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		key         string
+		setEnv      func()
+		expectVal   string
+		expectError bool
+	}{
+		{
+			scenario:    "non-existing environment variable",
+			key:         "NON_EXISTING",
+			expectVal:   "",
+			expectError: true,
+		},
+		{
+			scenario: "empty environment variable",
+			key:      "EMPTY_STRING",
+			setEnv: func() {
+				err := os.Setenv("EMPTY_STRING", "")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectVal:   "",
+			expectError: true,
+		},
+		{
+			scenario: "success",
+			key:      "EXISTING_STRING_VALUE",
+			setEnv: func() {
+				err := os.Setenv("EXISTING_STRING_VALUE", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectVal:   "foo",
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			if tc.setEnv != nil {
+				tc.setEnv()
+			}
+
+			val, err := StringEnv(tc.key)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectVal != val {
+				t.Errorf("expected value '%s' but got '%s'", tc.expectVal, val)
+			}
+		})
+	}
+}
+
+func TestIntEnv(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		key         string
+		setEnv      func()
+		expectVal   int
+		expectError bool
+	}{
+		{
+			scenario: "empty environment variable",
+			key:      "EMPTY_INT",
+			setEnv: func() {
+				err := os.Setenv("EMPTY_INT", "")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectVal:   0,
+			expectError: true,
+		},
+		{
+			scenario: "non-integer value",
+			key:      "NON_INTEGER",
+			setEnv: func() {
+				err := os.Setenv("NON_INTEGER", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectVal:   0,
+			expectError: true,
+		},
+		{
+			scenario: "success",
+			key:      "EXISTING_INT_VALUE",
+			setEnv: func() {
+				err := os.Setenv("EXISTING_INT_VALUE", "123")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectVal:   123,
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			if tc.setEnv != nil {
+				tc.setEnv()
+			}
+
+			val, err := IntEnv(tc.key)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectVal != val {
+				t.Errorf("expected value %d but got %d", tc.expectVal, val)
+			}
+		})
+	}
+}

pkg/gotenberg/filter.go

@@ -0,0 +1,53 @@
+package gotenberg
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/dlclark/regexp2"
+)
+
+// ErrFiltered happens if a value is filtered by the [FilterDeadline] function.
+var ErrFiltered = errors.New("value filtered")
+
+// FilterDeadline checks if given value is allowed and not denied according to
+// regex patterns. It returns a [context.DeadlineExceeded] if it takes too long
+// to process.
+func FilterDeadline(allowed, denied *regexp2.Regexp, s string, deadline time.Time) error {
+	// FIXME: not ideal to compile everytime, but is there another way to create a clone?
+	if allowed.String() != "" {
+		allow := regexp2.MustCompile(allowed.String(), 0)
+		allow.MatchTimeout = time.Until(deadline)
+
+		ok, err := allow.MatchString(s)
+		if err != nil {
+			if time.Now().After(deadline) {
+				return context.DeadlineExceeded
+			}
+			return fmt.Errorf("'%s' cannot handle '%s': %w", allow.String(), s, err)
+		}
+		if !ok {
+			return fmt.Errorf("'%s' does not match the expression from the allowed list: %w", s, ErrFiltered)
+		}
+	}
+
+	if denied.String() != "" {
+		deny := regexp2.MustCompile(denied.String(), 0)
+		deny.MatchTimeout = time.Until(deadline)
+
+		ok, err := deny.MatchString(s)
+		if err != nil {
+			if time.Now().After(deadline) {
+				return context.DeadlineExceeded
+			}
+			return fmt.Errorf("'%s' cannot handle '%s': %w", deny.String(), s, err)
+		}
+		if ok {
+			return fmt.Errorf("'%s' matches the expression from the denied list: %w", s, ErrFiltered)
+		}
+	}
+
+	return nil
+}

pkg/gotenberg/filter_test.go

@@ -0,0 +1,83 @@
+package gotenberg
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/dlclark/regexp2"
+)
+
+func TestFilterDeadline(t *testing.T) {
+	for _, tc := range []struct {
+		scenario      string
+		allowed       *regexp2.Regexp
+		denied        *regexp2.Regexp
+		s             string
+		deadline      time.Time
+		expectError   bool
+		expectedError error
+	}{
+		{
+			scenario:      "DeadlineExceeded (allowed)",
+			allowed:       regexp2.MustCompile("foo", 0),
+			denied:        regexp2.MustCompile("", 0),
+			s:             "foo",
+			deadline:      time.Now().Add(time.Duration(-1) * time.Hour),
+			expectError:   true,
+			expectedError: context.DeadlineExceeded,
+		},
+		{
+			scenario:      "ErrFiltered (allowed)",
+			allowed:       regexp2.MustCompile("foo", 0),
+			denied:        regexp2.MustCompile("", 0),
+			s:             "bar",
+			deadline:      time.Now().Add(time.Duration(5) * time.Second),
+			expectError:   true,
+			expectedError: ErrFiltered,
+		},
+		{
+			scenario:      "DeadlineExceeded (denied)",
+			allowed:       regexp2.MustCompile("", 0),
+			denied:        regexp2.MustCompile("foo", 0),
+			s:             "foo",
+			deadline:      time.Now().Add(time.Duration(-1) * time.Hour),
+			expectError:   true,
+			expectedError: context.DeadlineExceeded,
+		},
+		{
+			scenario:      "ErrFiltered (denied)",
+			allowed:       regexp2.MustCompile("", 0),
+			denied:        regexp2.MustCompile("foo", 0),
+			s:             "foo",
+			deadline:      time.Now().Add(time.Duration(5) * time.Second),
+			expectError:   true,
+			expectedError: ErrFiltered,
+		},
+		{
+			scenario:    "success",
+			allowed:     regexp2.MustCompile("", 0),
+			denied:      regexp2.MustCompile("", 0),
+			s:           "foo",
+			deadline:    time.Now().Add(time.Duration(5) * time.Second),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			err := FilterDeadline(tc.allowed, tc.denied, tc.s, tc.deadline)
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected an error but got none")
+			}
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectedError != nil && !errors.Is(err, tc.expectedError) {
+				t.Fatalf("expected error %v but got: %v", tc.expectedError, err)
+			}
+		})
+	}
+}

pkg/gotenberg/flags.go

@@ -1,9 +1,9 @@
 package gotenberg
 
 import (
-	"regexp"
 	"time"
 
+	"github.com/dlclark/regexp2"
 	"github.com/labstack/gommon/bytes"
 	flag "github.com/spf13/pflag"
 )
@@ -168,50 +168,54 @@ func (f *ParsedFlags) MustDeprecatedDuration(deprecated string, newName string)
 	return f.MustDuration(newName)
 }
 
-// MustHumanReadableBytesString returns the human-readable bytes string of a
-// flag given by name.
+// MustHumanReadableBytes returns the human-readable bytes string of a flag
+// given by name.
 // It panics if an error occurs.
-func (f *ParsedFlags) MustHumanReadableBytesString(name string) string {
+func (f *ParsedFlags) MustHumanReadableBytes(name string) int64 {
 	val, err := f.GetString(name)
 	if err != nil {
 		panic(err)
 	}
 
-	_, err = bytes.Parse(val)
+	if val == "" {
+		return 0
+	}
+
+	b, err := bytes.Parse(val)
 	if err != nil {
 		panic(err)
 	}
 
-	return val
+	return b
 }
 
-// MustDeprecatedHumanReadableBytesString returns the human-readable bytes
-// string of a deprecated flag if it was explicitly set or the human-readable
-// bytes string of the new flag.
+// MustDeprecatedHumanReadableBytes returns the human-readable bytes of a
+// deprecated flag if it was explicitly set or the human-readable bytes string
+// of the new flag.
 // It panics if an error occurs.
-func (f *ParsedFlags) MustDeprecatedHumanReadableBytesString(deprecated string, newName string) string {
+func (f *ParsedFlags) MustDeprecatedHumanReadableBytes(deprecated string, newName string) int64 {
 	if f.Changed(deprecated) {
-		return f.MustHumanReadableBytesString(deprecated)
+		return f.MustHumanReadableBytes(deprecated)
 	}
 
-	return f.MustHumanReadableBytesString(newName)
+	return f.MustHumanReadableBytes(newName)
 }
 
 // MustRegexp returns the regular expression of a flag given by name.
 // It panics if an error occurs.
-func (f *ParsedFlags) MustRegexp(name string) *regexp.Regexp {
+func (f *ParsedFlags) MustRegexp(name string) *regexp2.Regexp {
 	val, err := f.GetString(name)
 	if err != nil {
 		panic(err)
 	}
 
-	return regexp.MustCompile(val)
+	return regexp2.MustCompile(val, 0)
 }
 
 // MustDeprecatedRegexp returns the regular expression of a deprecated flag if
 // it was explicitly set or the regular expression of the new flag.
 // It panics if an error occurs.
-func (f *ParsedFlags) MustDeprecatedRegexp(deprecated string, newName string) *regexp.Regexp {
+func (f *ParsedFlags) MustDeprecatedRegexp(deprecated string, newName string) *regexp2.Regexp {
 	if f.Changed(deprecated) {
 		return f.MustRegexp(deprecated)
 	}

pkg/gotenberg/flags_test.go

@@ -644,10 +644,11 @@ func TestParsedFlags_MustDeprecatedDuration(t *testing.T) {
 	}
 }
 
-func TestParsedFlags_MustHumanReadableBytesString(t *testing.T) {
+func TestParsedFlags_MustHumanReadableBytes(t *testing.T) {
 	fs := flag.NewFlagSet("tests", flag.ContinueOnError)
 	fs.String("foo", "1MB", "")
 	fs.String("bar", "1MB", "")
+	fs.String("qux", "", "")
 
 	err := fs.Parse([]string{"--foo=1GB", "--bar=foo"})
 	if err != nil {
@@ -671,6 +672,11 @@ func TestParsedFlags_MustHumanReadableBytesString(t *testing.T) {
 			name:        "bar",
 			expectPanic: true,
 		},
+		{
+			scenario:    "success: empty value",
+			name:        "qux",
+			expectPanic: false,
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
@@ -689,31 +695,31 @@ func TestParsedFlags_MustHumanReadableBytesString(t *testing.T) {
 				}()
 			}
 
-			parsedFlags.MustHumanReadableBytesString(tc.name)
+			parsedFlags.MustHumanReadableBytes(tc.name)
 		})
 	}
 }
 
-func TestParsedFlags_MustDeprecatedHumanReadableBytesString(t *testing.T) {
+func TestParsedFlags_MustDeprecatedHumanReadableBytes(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
 		rawFlags    []string
-		expectValue string
+		expectValue int64
 	}{
 		{
 			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=1MB"},
-			expectValue: "1MB",
+			expectValue: 1000000,
 		},
 		{
 			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=2MB"},
-			expectValue: "2MB",
+			expectValue: 2000000,
 		},
 		{
 			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=1MB", "--bar=2MB"},
-			expectValue: "1MB",
+			expectValue: 1000000,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
@@ -728,9 +734,9 @@ func TestParsedFlags_MustDeprecatedHumanReadableBytesString(t *testing.T) {
 				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			actual := parsedFlags.MustDeprecatedHumanReadableBytesString("foo", "bar")
+			actual := parsedFlags.MustDeprecatedHumanReadableBytes("foo", "bar")
 			if actual != tc.expectValue {
-				t.Errorf("expected '%s' but got '%s'", tc.expectValue, actual)
+				t.Errorf("expected %d but got %d", tc.expectValue, actual)
 			}
 		})
 	}

pkg/gotenberg/fs.go

@@ -3,22 +3,56 @@ package gotenberg
 import (
 	"fmt"
 	"os"
+	"path/filepath"
+	"strings"
 
 	"github.com/google/uuid"
 )
 
+// MkdirAll defines the method signature for create a directory. Implement this
+// interface if you don't want to rely on [os.MkdirAll], notably for testing
+// purpose.
+type MkdirAll interface {
+	// MkdirAll uses the same signature as [os.MkdirAll].
+	MkdirAll(path string, perm os.FileMode) error
+}
+
+// OsMkdirAll implements the [MkdirAll] interface with [os.MkdirAll].
+type OsMkdirAll struct{}
+
+// MkdirAll is a wrapper around [os.MkdirAll].
+func (o *OsMkdirAll) MkdirAll(path string, perm os.FileMode) error { return os.MkdirAll(path, perm) }
+
+// PathRename defines the method signature for renaming files. Implement this
+// interface if you don't want to rely on [os.Rename], notably for testing
+// purpose.
+type PathRename interface {
+	// Rename uses the same signature as [os.Rename].
+	Rename(oldpath, newpath string) error
+}
+
+// OsPathRename implements the [PathRename] interface with [os.Rename].
+type OsPathRename struct{}
+
+// Rename is a wrapper around [os.Rename].
+func (o *OsPathRename) Rename(oldpath, newpath string) error {
+	return os.Rename(oldpath, newpath)
+}
+
 // FileSystem provides utilities for managing temporary directories. It creates
 // unique directory names based on UUIDs to ensure isolation of temporary files
 // for different modules.
 type FileSystem struct {
 	workingDir string
+	mkdirAll   MkdirAll
 }
 
 // NewFileSystem initializes a new [FileSystem] instance with a unique working
 // directory.
-func NewFileSystem() *FileSystem {
+func NewFileSystem(mkdirAll MkdirAll) *FileSystem {
 	return &FileSystem{
 		workingDir: uuid.NewString(),
+		mkdirAll:   mkdirAll,
 	}
 }
 
@@ -44,10 +78,35 @@ func (fs *FileSystem) NewDirPath() string {
 func (fs *FileSystem) MkdirAll() (string, error) {
 	path := fs.NewDirPath()
 
-	err := os.MkdirAll(path, 0o755)
+	err := fs.mkdirAll.MkdirAll(path, 0o755)
 	if err != nil {
 		return "", fmt.Errorf("create directory %s: %w", path, err)
 	}
 
 	return path, nil
 }
+
+// WalkDir walks through the root level of a directory and returns a list of
+// files paths that match the specified file extension.
+func WalkDir(dir, ext string) ([]string, error) {
+	var files []string
+	err := filepath.Walk(dir, func(path string, info os.FileInfo, pathErr error) error {
+		if pathErr != nil {
+			return pathErr
+		}
+		if info.IsDir() {
+			return nil
+		}
+		if strings.EqualFold(filepath.Ext(info.Name()), ext) {
+			files = append(files, path)
+		}
+		return nil
+	})
+	return files, err
+}
+
+// Interface guards.
+var (
+	_ MkdirAll   = (*OsMkdirAll)(nil)
+	_ PathRename = (*OsPathRename)(nil)
+)

pkg/gotenberg/fs_test.go

@@ -1,14 +1,84 @@
 package gotenberg
 
 import (
+	"errors"
 	"fmt"
+	"io"
 	"os"
+	"path/filepath"
+	"reflect"
 	"strings"
 	"testing"
+
+	"github.com/google/uuid"
 )
 
+func TestOsMkdirAll_MkdirAll(t *testing.T) {
+	dirPath, err := NewFileSystem(new(OsMkdirAll)).MkdirAll()
+	if err != nil {
+		t.Fatalf("create working directory: %v", err)
+	}
+
+	err = os.RemoveAll(dirPath)
+	if err != nil {
+		t.Fatalf("remove working directory: %v", err)
+	}
+}
+
+func TestOsPathRename_Rename(t *testing.T) {
+	dirPath, err := NewFileSystem(new(OsMkdirAll)).MkdirAll()
+	if err != nil {
+		t.Fatalf("create working directory: %v", err)
+	}
+
+	path := "/tests/test/testdata/api/sample1.txt"
+	copyPath := filepath.Join(dirPath, fmt.Sprintf("%s.txt", uuid.NewString()))
+
+	in, err := os.Open(path)
+	if err != nil {
+		t.Fatalf("open file: %v", err)
+	}
+
+	defer func() {
+		err := in.Close()
+		if err != nil {
+			t.Fatalf("close file: %v", err)
+		}
+	}()
+
+	out, err := os.Create(copyPath)
+	if err != nil {
+		t.Fatalf("create new file: %v", err)
+	}
+
+	defer func() {
+		err := out.Close()
+		if err != nil {
+			t.Fatalf("close new file: %v", err)
+		}
+	}()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		t.Fatalf("copy file to new file: %v", err)
+	}
+
+	rename := new(OsPathRename)
+	newPath := filepath.Join(dirPath, fmt.Sprintf("%s.txt", uuid.NewString()))
+
+	err = rename.Rename(copyPath, newPath)
+	if err != nil {
+		t.Errorf("expected no error but got: %v", err)
+	}
+
+	err = os.RemoveAll(dirPath)
+	if err != nil {
+		t.Fatalf("remove working directory: %v", err)
+	}
+}
+
 func TestFileSystem_WorkingDir(t *testing.T) {
-	fs := NewFileSystem()
+	fs := NewFileSystem(new(MkdirAllMock))
 	dirName := fs.WorkingDir()
 
 	if dirName == "" {
@@ -17,7 +87,7 @@ func TestFileSystem_WorkingDir(t *testing.T) {
 }
 
 func TestFileSystem_WorkingDirPath(t *testing.T) {
-	fs := NewFileSystem()
+	fs := NewFileSystem(new(MkdirAllMock))
 	expectedPath := fmt.Sprintf("%s/%s", os.TempDir(), fs.WorkingDir())
 
 	if fs.WorkingDirPath() != expectedPath {
@@ -26,7 +96,7 @@ func TestFileSystem_WorkingDirPath(t *testing.T) {
 }
 
 func TestFileSystem_NewDirPath(t *testing.T) {
-	fs := NewFileSystem()
+	fs := NewFileSystem(new(MkdirAllMock))
 	newDir := fs.NewDirPath()
 	expectedPrefix := fs.WorkingDirPath()
 
@@ -36,20 +106,117 @@ func TestFileSystem_NewDirPath(t *testing.T) {
 }
 
 func TestFileSystem_MkdirAll(t *testing.T) {
-	fs := NewFileSystem()
+	for _, tc := range []struct {
+		scenario    string
+		mkdirAll    MkdirAll
+		expectError bool
+	}{
+		{
+			scenario: "error",
+			mkdirAll: &MkdirAllMock{
+				MkdirAllMock: func(path string, perm os.FileMode) error {
+					return errors.New("foo")
+				},
+			},
+			expectError: true,
+		},
+		{
+			scenario: "success",
+			mkdirAll: &MkdirAllMock{
+				MkdirAllMock: func(path string, perm os.FileMode) error {
+					return nil
+				},
+			},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := NewFileSystem(tc.mkdirAll)
 
-	newPath, err := fs.MkdirAll()
-	if err != nil {
-		t.Fatalf("expected no error but got: %v", err)
-	}
+			_, err := fs.MkdirAll()
 
-	_, err = os.Stat(newPath)
-	if os.IsNotExist(err) {
-		t.Errorf("expected directory '%s' to exist but it doesn't", newPath)
-	}
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-	err = os.RemoveAll(fs.WorkingDirPath())
-	if err != nil {
-		t.Fatalf("expected no error while cleaning up but got: %v", err)
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
+func TestWalkDir(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		dir         string
+		ext         string
+		expectError bool
+		expectFiles []string
+	}{
+		{
+			scenario:    "directory does not exist",
+			dir:         uuid.NewString(),
+			ext:         ".pdf",
+			expectError: true,
+		},
+		{
+			scenario: "find PDF files",
+			dir: func() string {
+				path := fmt.Sprintf("%s/a_directory", os.TempDir())
+
+				err := os.MkdirAll(path, 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/a_foo_file.pdf", path), []byte{1}, 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/a_bar_file.PDF", path), []byte{1}, 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/a_baz_file.txt", path), []byte{1}, 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return path
+			}(),
+			ext:         ".pdf",
+			expectError: false,
+			expectFiles: []string{"/tmp/a_directory/a_bar_file.PDF", "/tmp/a_directory/a_foo_file.pdf"},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			defer func() {
+				err := os.RemoveAll(tc.dir)
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up but got: %v", err)
+				}
+			}()
+
+			files, err := WalkDir(tc.dir, tc.ext)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectError && err != nil {
+				return
+			}
+
+			if !reflect.DeepEqual(files, tc.expectFiles) {
+				t.Errorf("expected files %+v, but got %+v", tc.expectFiles, files)
+			}
+		})
 	}
 }

pkg/gotenberg/gc.go

@@ -5,13 +5,14 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"go.uber.org/zap"
 )
 
 // GarbageCollect scans the root path and deletes files or directories with
-// names containing specific substrings.
-func GarbageCollect(logger *zap.Logger, rootPath string, includeSubstr []string) error {
+// names containing specific substrings and before a given experiation time.
+func GarbageCollect(logger *zap.Logger, rootPath string, includeSubstr []string, expirationTime time.Time) error {
 	logger = logger.Named("gc")
 
 	// To make sure that the next Walk method stays on
@@ -36,7 +37,7 @@ func GarbageCollect(logger *zap.Logger, rootPath string, includeSubstr []string)
 		}
 
 		for _, substr := range includeSubstr {
-			if strings.Contains(info.Name(), substr) || path == substr {
+			if (strings.Contains(info.Name(), substr) || path == substr) && info.ModTime().Before(expirationTime) {
 				err := os.RemoveAll(path)
 				if err != nil {
 					return fmt.Errorf("garbage collect '%s': %w", path, err)

pkg/gotenberg/gc_test.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"testing"
+	"time"
 
 	"github.com/google/uuid"
 	"go.uber.org/zap"
@@ -64,7 +65,7 @@ func TestGarbageCollect(t *testing.T) {
 				}
 			}()
 
-			err := GarbageCollect(zap.NewNop(), tc.rootPath, tc.includeSubstr)
+			err := GarbageCollect(zap.NewNop(), tc.rootPath, tc.includeSubstr, time.Now())
 
 			if !tc.expectError && err != nil {
 				t.Fatalf("expected no error but got: %v", err)

pkg/gotenberg/logging.go

@@ -1,6 +1,11 @@
 package gotenberg
 
-import "go.uber.org/zap"
+import (
+	"fmt"
+
+	"github.com/hashicorp/go-retryablehttp"
+	"go.uber.org/zap"
+)
 
 // LoggerProvider is an interface for a module that supplies a method for
 // creating a [zap.Logger] instance for use by other modules.
@@ -12,3 +17,41 @@ import "go.uber.org/zap"
 type LoggerProvider interface {
 	Logger(mod Module) (*zap.Logger, error)
 }
+
+// LeveledLogger is wrapper around a [zap.Logger] so that it may be used by a
+// [retryablehttp.Client].
+type LeveledLogger struct {
+	logger *zap.Logger
+}
+
+// NewLeveledLogger instantiates a [LeveledLogger].
+func NewLeveledLogger(logger *zap.Logger) *LeveledLogger {
+	return &LeveledLogger{
+		logger: logger,
+	}
+}
+
+// Error logs a message at error level using the wrapped zap.Logger.
+func (leveled LeveledLogger) Error(msg string, keysAndValues ...interface{}) {
+	leveled.logger.Error(fmt.Sprintf("%s: %+v", msg, keysAndValues))
+}
+
+// Warn logs a message at warning level using the wrapped zap.Logger.
+func (leveled LeveledLogger) Warn(msg string, keysAndValues ...interface{}) {
+	leveled.logger.Warn(fmt.Sprintf("%s: %+v", msg, keysAndValues))
+}
+
+// Info logs a message at info level using the wrapped zap.Logger.
+func (leveled LeveledLogger) Info(msg string, keysAndValues ...interface{}) {
+	leveled.logger.Info(fmt.Sprintf("%s: %+v", msg, keysAndValues))
+}
+
+// Debug logs a message at debug level using the wrapped zap.Logger.
+func (leveled LeveledLogger) Debug(msg string, keysAndValues ...interface{}) {
+	leveled.logger.Debug(fmt.Sprintf("%s: %+v", msg, keysAndValues))
+}
+
+// Interface guards.
+var (
+	_ retryablehttp.LeveledLogger = (*LeveledLogger)(nil)
+)

pkg/gotenberg/logging_test.go

@@ -1,4 +1,4 @@
-package webhook
+package gotenberg
 
 import (
 	"testing"
@@ -7,17 +7,17 @@ import (
 )
 
 func TestLeveledLogger_Error(t *testing.T) {
-	leveledLogger{logger: zap.NewNop()}.Error("foo")
+	NewLeveledLogger(zap.NewNop()).Error("foo")
 }
 
 func TestLeveledLogger_Warn(t *testing.T) {
-	leveledLogger{logger: zap.NewNop()}.Warn("foo")
+	NewLeveledLogger(zap.NewNop()).Warn("foo")
 }
 
 func TestLeveledLogger_Info(t *testing.T) {
-	leveledLogger{logger: zap.NewNop()}.Info("foo")
+	NewLeveledLogger(zap.NewNop()).Info("foo")
 }
 
 func TestLeveledLogger_Debug(t *testing.T) {
-	leveledLogger{logger: zap.NewNop()}.Debug("foo")
+	NewLeveledLogger(zap.NewNop()).Debug("foo")
 }

pkg/gotenberg/mocks.go

@@ -2,6 +2,7 @@ package gotenberg
 
 import (
 	"context"
+	"os"
 
 	"go.uber.org/zap"
 )
@@ -34,19 +35,41 @@ func (mod *ValidatorMock) Validate() error {
 }
 
 // PdfEngineMock is a mock for the [PdfEngine] interface.
+//
+//nolint:dupl
 type PdfEngineMock struct {
-	MergeMock   func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error
-	ConvertMock func(ctx context.Context, logger *zap.Logger, formats PdfFormats, inputPath, outputPath string) error
+	MergeMock         func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error
+	SplitMock         func(ctx context.Context, logger *zap.Logger, mode SplitMode, inputPath, outputDirPath string) ([]string, error)
+	FlattenMock       func(ctx context.Context, logger *zap.Logger, inputPath string) error
+	ConvertMock       func(ctx context.Context, logger *zap.Logger, formats PdfFormats, inputPath, outputPath string) error
+	ReadMetadataMock  func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error)
+	WriteMetadataMock func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error
 }
 
 func (engine *PdfEngineMock) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 	return engine.MergeMock(ctx, logger, inputPaths, outputPath)
 }
 
+func (engine *PdfEngineMock) Split(ctx context.Context, logger *zap.Logger, mode SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	return engine.SplitMock(ctx, logger, mode, inputPath, outputDirPath)
+}
+
+func (engine *PdfEngineMock) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	return engine.FlattenMock(ctx, logger, inputPath)
+}
+
 func (engine *PdfEngineMock) Convert(ctx context.Context, logger *zap.Logger, formats PdfFormats, inputPath, outputPath string) error {
 	return engine.ConvertMock(ctx, logger, formats, inputPath, outputPath)
 }
 
+func (engine *PdfEngineMock) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	return engine.ReadMetadataMock(ctx, logger, inputPath)
+}
+
+func (engine *PdfEngineMock) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	return engine.WriteMetadataMock(ctx, logger, metadata, inputPath)
+}
+
 // PdfEngineProviderMock is a mock for the [PdfEngineProvider] interface.
 type PdfEngineProviderMock struct {
 	PdfEngineMock func() (PdfEngine, error)
@@ -127,6 +150,24 @@ func (provider *MetricsProviderMock) Metrics() ([]Metric, error) {
 	return provider.MetricsMock()
 }
 
+// MkdirAllMock is a mock for the [MkdirAll] interface.
+type MkdirAllMock struct {
+	MkdirAllMock func(path string, perm os.FileMode) error
+}
+
+func (mkdirAll *MkdirAllMock) MkdirAll(path string, perm os.FileMode) error {
+	return mkdirAll.MkdirAllMock(path, perm)
+}
+
+// PathRenameMock is a mock for the [PathRename] interface.
+type PathRenameMock struct {
+	RenameMock func(oldpath, newpath string) error
+}
+
+func (rename *PathRenameMock) Rename(oldpath, newpath string) error {
+	return rename.RenameMock(oldpath, newpath)
+}
+
 // Interface guards.
 var (
 	_ Module            = (*ModuleMock)(nil)
@@ -137,4 +178,6 @@ var (
 	_ ProcessSupervisor = (*ProcessSupervisorMock)(nil)
 	_ LoggerProvider    = (*LoggerProviderMock)(nil)
 	_ MetricsProvider   = (*MetricsProviderMock)(nil)
+	_ MkdirAll          = (*MkdirAllMock)(nil)
+	_ PathRename        = (*PathRenameMock)(nil)
 )

pkg/gotenberg/mocks_test.go

@@ -2,6 +2,7 @@ package gotenberg
 
 import (
 	"context"
+	"os"
 	"testing"
 
 	"go.uber.org/zap"
@@ -52,9 +53,21 @@ func TestPDFEngineMock(t *testing.T) {
 		MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 			return nil
 		},
+		SplitMock: func(ctx context.Context, logger *zap.Logger, mode SplitMode, inputPath, outputDirPath string) ([]string, error) {
+			return nil, nil
+		},
+		FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+			return nil
+		},
 		ConvertMock: func(ctx context.Context, logger *zap.Logger, formats PdfFormats, inputPath, outputPath string) error {
 			return nil
 		},
+		ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+			return nil, nil
+		},
+		WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+			return nil
+		},
 	}
 
 	err := mock.Merge(context.Background(), zap.NewNop(), nil, "")
@@ -62,10 +75,30 @@ func TestPDFEngineMock(t *testing.T) {
 		t.Errorf("expected no error from PdfEngineMock.Merge, but got: %v", err)
 	}
 
+	_, err = mock.Split(context.Background(), zap.NewNop(), SplitMode{}, "", "")
+	if err != nil {
+		t.Errorf("expected no error from PdfEngineMock.Split, but got: %v", err)
+	}
+
+	err = mock.Flatten(context.Background(), zap.NewNop(), "")
+	if err != nil {
+		t.Errorf("expected no error from PdfEngineMock.Convert, but got: %v", err)
+	}
+
 	err = mock.Convert(context.Background(), zap.NewNop(), PdfFormats{}, "", "")
 	if err != nil {
 		t.Errorf("expected no error from PdfEngineMock.Convert, but got: %v", err)
 	}
+
+	_, err = mock.ReadMetadata(context.Background(), zap.NewNop(), "")
+	if err != nil {
+		t.Errorf("expected no error from PdfEngineMock.ReadMetadata, but got: %v", err)
+	}
+
+	err = mock.WriteMetadata(context.Background(), zap.NewNop(), map[string]interface{}{}, "")
+	if err != nil {
+		t.Errorf("expected no error from PdfEngineMock.WriteMetadata but got: %v", err)
+	}
 }
 
 func TestPDFEngineProviderMock(t *testing.T) {
@@ -188,3 +221,29 @@ func TestMetricsProviderMock(t *testing.T) {
 		t.Errorf("expected no error from MetricsProviderMock.Metrics, but got: %v", err)
 	}
 }
+
+func TestMkdirAllMock(t *testing.T) {
+	mock := &MkdirAllMock{
+		MkdirAllMock: func(dir string, perm os.FileMode) error {
+			return nil
+		},
+	}
+
+	err := mock.MkdirAll("/foo", 0o755)
+	if err != nil {
+		t.Errorf("expected no error from MkdirAllMock.MkdirAll, but got: %v", err)
+	}
+}
+
+func TestPathRenameMock(t *testing.T) {
+	mock := &PathRenameMock{
+		RenameMock: func(oldpath, newpath string) error {
+			return nil
+		},
+	}
+
+	err := mock.Rename("", "")
+	if err != nil {
+		t.Errorf("expected no error from PathRenameMock.Rename, but got: %v", err)
+	}
+}

pkg/gotenberg/modules.go

@@ -83,7 +83,7 @@ type SystemLogger interface {
 //		gotenberg.MustRegisterModule(YourModule{})
 //	}
 //
-// Then, in the main command (github.com/gotenberg/gotenberg/v7/cmd/gotenberg),
+// Then, in the main command (github.com/gotenberg/gotenberg/v8/cmd/gotenberg),
 // import the module:
 //
 //	imports (

pkg/gotenberg/pdfengine.go

@@ -12,11 +12,43 @@ var (
 	// PdfEngine interface is not supported by its current implementation.
 	ErrPdfEngineMethodNotSupported = errors.New("method not supported")
 
+	// ErrPdfSplitModeNotSupported is returned when the Split method of the
+	// PdfEngine interface does not sumport a requested PDF split mode.
+	ErrPdfSplitModeNotSupported = errors.New("split mode not supported")
+
 	// ErrPdfFormatNotSupported is returned when the Convert method of the
 	// PdfEngine interface does not support a requested PDF format conversion.
 	ErrPdfFormatNotSupported = errors.New("PDF format not supported")
+
+	// ErrPdfEngineMetadataValueNotSupported is returned when a metadata value
+	// is not supported.
+	ErrPdfEngineMetadataValueNotSupported = errors.New("metadata value not supported")
 )
 
+const (
+	// SplitModeIntervals represents a mode where a PDF is split at specific
+	// intervals.
+	SplitModeIntervals string = "intervals"
+
+	// SplitModePages represents a mode where a PDF is split at specific page
+	// ranges.
+	SplitModePages string = "pages"
+)
+
+// SplitMode gathers the data required to split a PDF into multiple parts.
+type SplitMode struct {
+	// Mode is either "intervals" or "pages".
+	Mode string
+
+	// Span is either the intervals or the page ranges to extract, depending on
+	// the selected mode.
+	Span string
+
+	// Unify specifies whether to put extracted pages into a single file or as
+	// many files as there are page ranges. Only works with "pages" mode.
+	Unify bool
+}
+
 const (
 	// PdfA1a represents the PDF/A-1a format.
 	PdfA1a string = "PDF/A-1a"
@@ -56,14 +88,31 @@ type PdfFormats struct {
 // PdfEngine provides an interface for operations on PDFs. Implementations
 // can utilize various tools like PDFtk, or implement functionality directly in
 // Go.
+//
+//nolint:dupl
 type PdfEngine interface {
 	// Merge combines multiple PDFs into a single PDF. The resulting page order
 	// is determined by the order of files provided in inputPaths.
 	Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error
 
+	// Split splits a given PDF file.
+	Split(ctx context.Context, logger *zap.Logger, mode SplitMode, inputPath, outputDirPath string) ([]string, error)
+
+	// Flatten merges existing annotation appearances with page content,
+	// effectively deleting the original annotations. This process can flatten
+	// forms as well, as forms share a relationship with annotations. Note that
+	// this operation is irreversible.
+	Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error
+
 	// Convert transforms a given PDF to the specified formats defined in
 	// PdfFormats. If no format, it does nothing.
 	Convert(ctx context.Context, logger *zap.Logger, formats PdfFormats, inputPath, outputPath string) error
+
+	// ReadMetadata extracts the metadata of a given PDF file.
+	ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error)
+
+	// WriteMetadata writes the metadata into a given PDF file.
+	WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error
 }
 
 // PdfEngineProvider offers an interface to instantiate a [PdfEngine].

pkg/gotenberg/sort.go

@@ -0,0 +1,69 @@
+package gotenberg
+
+import (
+	"regexp"
+	"sort"
+	"strconv"
+)
+
+// AlphanumericSort implements sort.Interface and helps to sort strings
+// alphanumerically.
+//
+// See: https://github.com/gotenberg/gotenberg/issues/805.
+type AlphanumericSort []string
+
+func (s AlphanumericSort) Len() int {
+	return len(s)
+}
+
+func (s AlphanumericSort) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (s AlphanumericSort) Less(i, j int) bool {
+	numI, restI := extractPrefix(s[i])
+	numJ, restJ := extractPrefix(s[j])
+
+	// Compares numerical prefixes if they exist.
+	if numI != -1 && numJ != -1 {
+		if numI != numJ {
+			return numI < numJ
+		}
+		// If numbers are equal, falls back to string comparison of the rest.
+		return restI < restJ
+	}
+
+	// If one has a numerical prefix and the other doesn't, the one with the
+	// number comes first.
+	if numI != -1 {
+		return true
+	}
+	if numJ != -1 {
+		return false
+	}
+
+	// If neither has a numerical prefix, compare as strings
+	return s[i] < s[j]
+}
+
+// extractPrefix attempts to extract a numerical prefix and the rest of the filename
+func extractPrefix(filename string) (int, string) {
+	matches := numPrefixRegexp.FindStringSubmatch(filename)
+	if len(matches) > 2 {
+		prefix, err := strconv.Atoi(matches[1])
+		if err == nil {
+			return prefix, matches[2]
+		}
+	}
+
+	// Returns -1 if no numerical prefix is found, indicating to just compare
+	// as strings.
+	return -1, filename
+}
+
+var numPrefixRegexp = regexp.MustCompile(`^(\d+)(.*)$`)
+
+// Interface guard.
+var (
+	_ sort.Interface = (*AlphanumericSort)(nil)
+)

pkg/gotenberg/sort_test.go

@@ -0,0 +1,34 @@
+package gotenberg
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+)
+
+func TestAlphanumericSort(t *testing.T) {
+	for _, tc := range []struct {
+		scenario     string
+		values       []string
+		expectedSort []string
+	}{
+		{
+			scenario:     "numeric and letters",
+			values:       []string{"10qux.pdf", "2_baz.txt", "2_aza.txt", "1bar.pdf", "Afoo.txt", "Bbar.docx", "25zeta.txt", "3.pdf", "4_foo.pdf"},
+			expectedSort: []string{"1bar.pdf", "2_aza.txt", "2_baz.txt", "3.pdf", "4_foo.pdf", "10qux.pdf", "25zeta.txt", "Afoo.txt", "Bbar.docx"},
+		},
+		{
+			scenario:     "hrtime (PHP library)",
+			values:       []string{"245654773395259", "245654773395039", "245654773395149", "245654773394919", "245654773394369"},
+			expectedSort: []string{"245654773394369", "245654773394919", "245654773395039", "245654773395149", "245654773395259"},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			sort.Sort(AlphanumericSort(tc.values))
+
+			if !reflect.DeepEqual(tc.values, tc.expectedSort) {
+				t.Fatalf("expected %+v but got: %+v", tc.expectedSort, tc.values)
+			}
+		})
+	}
+}

pkg/gotenberg/supervisor.go

@@ -2,12 +2,21 @@ package gotenberg
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"sync/atomic"
 
 	"go.uber.org/zap"
 )
 
+// ErrProcessAlreadyRestarting happens if the [ProcessSupervisor] is trying
+// to restart an already restarting [Process].
+var ErrProcessAlreadyRestarting = errors.New("process already restarting")
+
+// ErrMaximumQueueSizeExceeded happens if Run() is called but the maximum queue
+// size is already used.
+var ErrMaximumQueueSizeExceeded = errors.New("maximum queue size exceeded")
+
 // Process is an interface that represents an abstract process
 // and provides methods for starting, stopping, and checking the health of the
 // process.
@@ -69,6 +78,7 @@ type processSupervisor struct {
 	logger          *zap.Logger
 	process         Process
 	maxReqLimit     int64
+	maxQueueSize    int64
 	mutexChan       chan struct{}
 	firstStart      atomic.Bool
 	reqCounter      atomic.Int64
@@ -78,12 +88,13 @@ type processSupervisor struct {
 }
 
 // NewProcessSupervisor initializes a new [ProcessSupervisor].
-func NewProcessSupervisor(logger *zap.Logger, process Process, maxReqLimit int64) ProcessSupervisor {
+func NewProcessSupervisor(logger *zap.Logger, process Process, maxReqLimit, maxQueueSize int64) ProcessSupervisor {
 	b := &processSupervisor{
-		logger:      logger,
-		process:     process,
-		mutexChan:   make(chan struct{}, 1),
-		maxReqLimit: maxReqLimit,
+		logger:       logger,
+		process:      process,
+		mutexChan:    make(chan struct{}, 1),
+		maxReqLimit:  maxReqLimit,
+		maxQueueSize: maxQueueSize,
 	}
 	b.reqCounter.Store(0)
 	b.reqQueueSize.Store(0)
@@ -122,7 +133,7 @@ func (s *processSupervisor) restart() error {
 	if s.isRestarting.Load() {
 		s.logger.Debug("process already restarting, skip restart")
 
-		return nil
+		return ErrProcessAlreadyRestarting
 	}
 
 	s.logger.Debug("restart process")
@@ -162,55 +173,98 @@ func (s *processSupervisor) Healthy() bool {
 }
 
 func (s *processSupervisor) Run(ctx context.Context, logger *zap.Logger, task func() error) error {
+	// A user reported a potential issue:
+	//
+	// "Although the counting operation is atomic, nothing prevent 2 concurrent
+	// goroutines to retrieve the same 'currentQueueSize' and to compare its
+	// value against the max limit. Then, resulting queue size would be 1 above
+	// the allowed limit."
+	//
+	// However, he was unable to actually trigger this issue, even when sending
+	// a lot of requests.
+	//
+	// For now, the best option is to consider this issue to be unlikely to
+	// happen, and keep the code as it is because it is more readable this way.
+	//
+	// See https://github.com/gotenberg/gotenberg/issues/951.
+	currentQueueSize := s.reqQueueSize.Load()
+	if s.maxQueueSize > 0 && currentQueueSize >= s.maxQueueSize {
+		return ErrMaximumQueueSizeExceeded
+	}
+
 	s.reqQueueSize.Add(1)
 
-	select {
-	case s.mutexChan <- struct{}{}:
-		logger.Debug("process lock acquired")
-		s.reqQueueSize.Add(-1)
-		s.reqCounter.Add(1)
+	for {
+		err := func() error {
+			select {
+			case s.mutexChan <- struct{}{}:
+				logger.Debug("process lock acquired")
+				s.reqQueueSize.Add(-1)
+				s.reqCounter.Add(1)
+				releaseMutexChan := true
 
-		defer func() {
-			logger.Debug("process lock released")
-			<-s.mutexChan
+				defer func() {
+					if releaseMutexChan {
+						logger.Debug("process lock released")
+						<-s.mutexChan
+					}
+				}()
+
+				if !s.firstStart.Load() {
+					err := s.runWithDeadline(ctx, func() error {
+						return s.Launch()
+					})
+					if err != nil {
+						return fmt.Errorf("process first start: %w", err)
+					}
+				}
+
+				if !s.Healthy() {
+					s.logger.Debug("process is unhealthy, cannot handle task, restarting...")
+					err := s.runWithDeadline(ctx, func() error {
+						return s.restart()
+					})
+					if err != nil {
+						return fmt.Errorf("process restart before task: %w", err)
+					}
+				}
+
+				err := s.runWithDeadline(ctx, task)
+
+				if s.maxReqLimit > 0 && s.reqCounter.Load() >= s.maxReqLimit {
+					s.logger.Debug("max request limit reached, restarting eagerly...")
+					releaseMutexChan = false
+
+					go func() {
+						err := s.runWithDeadline(context.Background(), func() error {
+							return s.restart()
+						})
+						if err != nil {
+							s.logger.Error(fmt.Sprintf("process restart after task: %v", err))
+						}
+						logger.Debug("process lock released")
+						<-s.mutexChan
+					}()
+				}
+
+				// Note: no error wrapping because it leaks on Chromium console exceptions output.
+				return err
+			case <-ctx.Done():
+				logger.Debug("failed to acquire process lock before deadline")
+				s.reqQueueSize.Add(-1)
+
+				return fmt.Errorf("acquire process lock: %w", ctx.Err())
+			}
 		}()
 
-		if !s.firstStart.Load() {
-			err := s.runWithDeadline(ctx, func() error {
-				return s.Launch()
-			})
-			if err != nil {
-				return fmt.Errorf("process first start: %w", err)
-			}
+		if errors.Is(err, ErrProcessAlreadyRestarting) {
+			logger.Debug("process is already restarting, trying to acquire process lock again...")
+			s.reqQueueSize.Add(1)
+			continue
 		}
 
-		if !s.Healthy() {
-			s.logger.Debug("process is unhealthy, cannot handle task, restarting...")
-			err := s.runWithDeadline(ctx, func() error {
-				return s.restart()
-			})
-			if err != nil {
-				return fmt.Errorf("process restart before task: %w", err)
-			}
-		}
-
-		if s.maxReqLimit > 0 && s.reqCounter.Load() >= s.maxReqLimit {
-			s.logger.Debug("max request limit reached, restarting...")
-			err := s.runWithDeadline(ctx, func() error {
-				return s.restart()
-			})
-			if err != nil {
-				return fmt.Errorf("process restart before task: %w", err)
-			}
-		}
-
-		// FIXME: no error wrapping because it leaks on Chromium console exceptions output.
-		return s.runWithDeadline(ctx, task)
-	case <-ctx.Done():
-		logger.Debug("failed to acquire process lock before deadline")
-		s.reqQueueSize.Add(-1)
-
-		return fmt.Errorf("acquire process lock: %w", ctx.Err())
+		// Note: no error wrapping because it leaks on Chromium console exceptions output.
+		return err
 	}
 }
 

pkg/gotenberg/supervisor_test.go

@@ -46,7 +46,7 @@ func TestProcessSupervisor_Launch(t *testing.T) {
 				},
 			}
 
-			ps := NewProcessSupervisor(logger, process, 5).(*processSupervisor)
+			ps := NewProcessSupervisor(logger, process, 5, 0).(*processSupervisor)
 			if tc.firstStartSet {
 				ps.firstStart.Store(true)
 			}
@@ -94,7 +94,7 @@ func TestProcessSupervisor_Shutdown(t *testing.T) {
 				},
 			}
 
-			ps := NewProcessSupervisor(logger, process, 5)
+			ps := NewProcessSupervisor(logger, process, 5, 0)
 			err := ps.Shutdown()
 
 			if !tc.expectError && err != nil {
@@ -115,11 +115,13 @@ func TestProcessSupervisor_restart(t *testing.T) {
 		startError          error
 		stopError           error
 		expectError         bool
+		expectedError       error
 	}{
 		{
 			scenario:            "already restarting",
 			initiallyRestarting: true,
-			expectError:         false,
+			expectError:         true,
+			expectedError:       ErrProcessAlreadyRestarting,
 		},
 		{
 			scenario:    "successful restart",
@@ -152,7 +154,7 @@ func TestProcessSupervisor_restart(t *testing.T) {
 				},
 			}
 
-			ps := NewProcessSupervisor(logger, process, 5).(*processSupervisor)
+			ps := NewProcessSupervisor(logger, process, 5, 0).(*processSupervisor)
 			if tc.initiallyRestarting {
 				ps.isRestarting.Store(true)
 			}
@@ -166,6 +168,10 @@ func TestProcessSupervisor_restart(t *testing.T) {
 			if tc.expectError && err == nil {
 				t.Fatal("expected error but got none")
 			}
+
+			if tc.expectedError != nil && !errors.Is(err, tc.expectedError) {
+				t.Fatalf("expected error %v but got: %v", tc.expectedError, err)
+			}
 		})
 	}
 }
@@ -211,7 +217,7 @@ func TestProcessSupervisor_Healthy(t *testing.T) {
 				},
 			}
 
-			ps := NewProcessSupervisor(logger, process, 5).(*processSupervisor)
+			ps := NewProcessSupervisor(logger, process, 5, 0).(*processSupervisor)
 			if tc.initiallyStarted {
 				ps.firstStart.Store(true)
 			}
@@ -232,19 +238,24 @@ func TestProcessSupervisor_Run(t *testing.T) {
 	for _, tc := range []struct {
 		scenario             string
 		initiallyStarted     bool
+		isRestarting         bool
 		startError           error
 		processHealthy       bool
 		maxReqLimit          int64
 		tasksToRun           int
 		taskError            error
 		expectError          bool
+		skipCallsCheck       bool
 		expectedStartCalls   int64
 		expectedHealthyCalls int64
 		expectedStopCalls    int64
+		currentQueueSize     int64
+		maxQueueSize         int64
 	}{
 		{
 			scenario:             "successfully run task on non-started process",
 			initiallyStarted:     false,
+			isRestarting:         false,
 			processHealthy:       true,
 			maxReqLimit:          2,
 			tasksToRun:           1,
@@ -256,6 +267,7 @@ func TestProcessSupervisor_Run(t *testing.T) {
 		{
 			scenario:             "cannot launch non-started process",
 			initiallyStarted:     false,
+			isRestarting:         false,
 			startError:           errors.New("launch error"),
 			processHealthy:       true,
 			maxReqLimit:          2,
@@ -268,6 +280,7 @@ func TestProcessSupervisor_Run(t *testing.T) {
 		{
 			scenario:             "run task with unhealthy process causing restart",
 			initiallyStarted:     true,
+			isRestarting:         false,
 			processHealthy:       false,
 			maxReqLimit:          2,
 			tasksToRun:           1,
@@ -280,6 +293,7 @@ func TestProcessSupervisor_Run(t *testing.T) {
 			scenario:             "cannot restart unhealthy process",
 			startError:           errors.New("start error"),
 			initiallyStarted:     true,
+			isRestarting:         false,
 			processHealthy:       false,
 			maxReqLimit:          2,
 			tasksToRun:           1,
@@ -288,9 +302,20 @@ func TestProcessSupervisor_Run(t *testing.T) {
 			expectedHealthyCalls: 1,
 			expectedStopCalls:    1,
 		},
+		{
+			scenario:         "ErrProcessAlreadyRestarting",
+			initiallyStarted: true,
+			isRestarting:     true,
+			processHealthy:   false,
+			maxReqLimit:      1,
+			tasksToRun:       1,
+			expectError:      true,
+			skipCallsCheck:   true,
+		},
 		{
 			scenario:             "run tasks reaching max request limit causing restart",
 			initiallyStarted:     true,
+			isRestarting:         false,
 			processHealthy:       true,
 			maxReqLimit:          2,
 			tasksToRun:           3,
@@ -300,9 +325,10 @@ func TestProcessSupervisor_Run(t *testing.T) {
 			expectedStopCalls:    1,
 		},
 		{
-			scenario:             "cannot restart after reaching max request limit",
+			scenario:             "auto-restart after reaching max request limit",
 			startError:           errors.New("start error"),
 			initiallyStarted:     true,
+			isRestarting:         false,
 			processHealthy:       true,
 			maxReqLimit:          2,
 			tasksToRun:           2,
@@ -314,6 +340,7 @@ func TestProcessSupervisor_Run(t *testing.T) {
 		{
 			scenario:             "task error",
 			initiallyStarted:     true,
+			isRestarting:         false,
 			processHealthy:       true,
 			maxReqLimit:          0,
 			tasksToRun:           1,
@@ -323,6 +350,34 @@ func TestProcessSupervisor_Run(t *testing.T) {
 			expectedHealthyCalls: 1,
 			expectedStopCalls:    0,
 		},
+		{
+			scenario:             "queue size exceeded",
+			initiallyStarted:     false,
+			isRestarting:         false,
+			processHealthy:       true,
+			maxReqLimit:          2,
+			tasksToRun:           1,
+			expectError:          true,
+			expectedStartCalls:   0,
+			expectedHealthyCalls: 0,
+			expectedStopCalls:    0,
+			currentQueueSize:     1,
+			maxQueueSize:         1,
+		},
+		{
+			scenario:             "queue size not exceeded",
+			initiallyStarted:     false,
+			isRestarting:         false,
+			processHealthy:       true,
+			maxReqLimit:          2,
+			tasksToRun:           1,
+			expectError:          true,
+			expectedStartCalls:   1,
+			expectedHealthyCalls: 1,
+			expectedStopCalls:    0,
+			currentQueueSize:     1,
+			maxQueueSize:         2,
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			logger := zap.NewNop()
@@ -347,10 +402,16 @@ func TestProcessSupervisor_Run(t *testing.T) {
 				},
 			}
 
-			ps := NewProcessSupervisor(logger, process, tc.maxReqLimit).(*processSupervisor)
+			ps := NewProcessSupervisor(logger, process, tc.maxReqLimit, tc.maxQueueSize).(*processSupervisor)
 			if tc.initiallyStarted {
 				ps.firstStart.Store(true)
 			}
+			if tc.isRestarting {
+				ps.isRestarting.Store(true)
+			}
+			if tc.currentQueueSize > 0 {
+				ps.reqQueueSize.Store(tc.currentQueueSize)
+			}
 
 			task := func() error {
 				return tc.taskError
@@ -386,6 +447,14 @@ func TestProcessSupervisor_Run(t *testing.T) {
 				}
 			}
 
+			if tc.skipCallsCheck {
+				return
+			}
+
+			// Making sure restarts are finished.
+			ps.mutexChan <- struct{}{}
+			<-ps.mutexChan
+
 			if startCalls.Load() != tc.expectedStartCalls {
 				t.Errorf("expected %d process.Start calls, got %d", tc.expectedStartCalls, startCalls.Load())
 			}
@@ -419,13 +488,13 @@ func TestProcessSupervisor_runWithDeadline(t *testing.T) {
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
-			ps := NewProcessSupervisor(zap.NewNop(), new(ProcessMock), 0).(*processSupervisor)
+			ps := NewProcessSupervisor(zap.NewNop(), new(ProcessMock), 0, 0).(*processSupervisor)
 
 			ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
-			defer cancel()
-
 			if tc.ctxDone {
 				cancel()
+			} else {
+				defer cancel()
 			}
 
 			err := ps.runWithDeadline(ctx, func() error {
@@ -453,7 +522,7 @@ func TestProcessSupervisor_ReqQueueSize(t *testing.T) {
 			return true
 		},
 	}
-	ps := NewProcessSupervisor(logger, process, 0).(*processSupervisor)
+	ps := NewProcessSupervisor(logger, process, 0, 0).(*processSupervisor)
 
 	// Simulating a lock.
 	ps.mutexChan <- struct{}{}
@@ -554,7 +623,7 @@ func TestProcessSupervisor_RestartsCount(t *testing.T) {
 				},
 			}
 
-			ps := NewProcessSupervisor(logger, process, 0).(*processSupervisor)
+			ps := NewProcessSupervisor(logger, process, 0, 0).(*processSupervisor)
 			ps.restartsCounter.Store(tc.initialRestartsCount)
 
 			for i := 0; i < tc.restartAttempts; i++ {

pkg/gotenberg/version.go

@@ -0,0 +1,4 @@
+package gotenberg
+
+// Version is the... version of the Gotenberg application.
+var Version = "snapshot"

pkg/modules/api/api.go

@@ -4,21 +4,22 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"net"
 	"net/http"
-	"os"
 	"sort"
-	"strconv"
 	"strings"
 	"time"
 
 	"github.com/alexliesenfeld/health"
+	"github.com/dlclark/regexp2"
 	"github.com/labstack/echo/v4"
 	flag "github.com/spf13/pflag"
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
 	"golang.org/x/net/http2"
+	"golang.org/x/sync/errgroup"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
@@ -29,21 +30,35 @@ func init() {
 // middlewares or health checks.
 type Api struct {
 	port                      int
-	readTimeout               time.Duration
-	writeTimeout              time.Duration
+	bindIp                    string
+	tlsCertFile               string
+	tlsKeyFile                string
+	startTimeout              time.Duration
+	bodyLimit                 int64
 	timeout                   time.Duration
 	rootPath                  string
 	traceHeader               string
+	basicAuthUsername         string
+	basicAuthPassword         string
+	downloadFromCfg           downloadFromConfig
 	disableHealthCheckLogging bool
 
 	routes              []Route
 	externalMiddlewares []Middleware
 	healthChecks        []health.CheckerOption
+	readyFn             []func() error
 	fs                  *gotenberg.FileSystem
 	logger              *zap.Logger
 	srv                 *echo.Echo
 }
 
+type downloadFromConfig struct {
+	allowList *regexp2.Regexp
+	denyList  *regexp2.Regexp
+	maxRetry  int
+	disable   bool
+}
+
 // Router is a module interface which adds routes to the [Api].
 type Router interface {
 	Routes() ([]Route, error)
@@ -147,6 +162,7 @@ type Middleware struct {
 // See https://github.com/alexliesenfeld/health for more details.
 type HealthChecker interface {
 	Checks() ([]health.CheckerOption, error)
+	Ready() error
 }
 
 // Descriptor returns an [Api]'s module descriptor.
@@ -157,23 +173,20 @@ func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 			fs := flag.NewFlagSet("api", flag.ExitOnError)
 			fs.Int("api-port", 3000, "Set the port on which the API should listen")
 			fs.String("api-port-from-env", "", "Set the environment variable with the port on which the API should listen - override the default port")
-			fs.Duration("api-read-timeout", time.Duration(30)*time.Second, "Set the maximum duration allowed to read a complete request, including the body")
-			fs.Duration("api-process-timeout", time.Duration(30)*time.Second, "Set the maximum duration allowed to process a request")
-			fs.Duration("api-write-timeout", time.Duration(30)*time.Second, "Set the maximum duration before timing out writes of the response")
+			fs.String("api-bind-ip", "", "Set the IP address the API should bind to for incoming connections")
+			fs.String("api-tls-cert-file", "", "Path to the TLS/SSL certificate file - for HTTPS support")
+			fs.String("api-tls-key-file", "", "Path to the TLS/SSL key file - for HTTPS support")
+			fs.Duration("api-start-timeout", time.Duration(30)*time.Second, "Set the time limit for the API to start")
 			fs.Duration("api-timeout", time.Duration(30)*time.Second, "Set the time limit for requests")
+			fs.String("api-body-limit", "", "Set the body limit for multipart/form-data requests - it accepts values like 5MB, 1GB, etc")
 			fs.String("api-root-path", "/", "Set the root path of the API - for service discovery via URL paths")
 			fs.String("api-trace-header", "Gotenberg-Trace", "Set the header name to use for identifying requests")
+			fs.Bool("api-enable-basic-auth", false, "Enable basic authentication - will look for the GOTENBERG_API_BASIC_AUTH_USERNAME and GOTENBERG_API_BASIC_AUTH_PASSWORD environment variables")
+			fs.String("api-download-from-allow-list", "", "Set the allowed URLs for the download from feature using a regular expression")
+			fs.String("api-download-from-deny-list", "", "Set the denied URLs for the download from feature using a regular expression")
+			fs.Int("api-download-from-max-retry", 4, "Set the maximum number of retries for the download from feature")
+			fs.Bool("api-disable-download-from", false, "Disable the download from feature")
 			fs.Bool("api-disable-health-check-logging", false, "Disable health check logging")
-
-			var err error
-			err = multierr.Append(err, fs.MarkDeprecated("api-read-timeout", "use api-timeout instead"))
-			err = multierr.Append(err, fs.MarkDeprecated("api-process-timeout", "use api-timeout instead"))
-			err = multierr.Append(err, fs.MarkDeprecated("api-write-timeout", "use api-timeout instead"))
-
-			if err != nil {
-				panic(fmt.Errorf("create deprecated flags for the api module: %v", err))
-			}
-
 			return fs
 		}(),
 		New: func() gotenberg.Module { return new(Api) },
@@ -184,34 +197,47 @@ func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 func (a *Api) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
 	a.port = flags.MustInt("api-port")
-	a.readTimeout = flags.MustDeprecatedDuration("api-read-timeout", "api-timeout")
-	a.writeTimeout = flags.MustDeprecatedDuration("api-write-timeout", "api-timeout")
-	a.timeout = flags.MustDeprecatedDuration("api-process-timeout", "api-timeout")
+	a.bindIp = flags.MustString("api-bind-ip")
+	a.tlsCertFile = flags.MustString("api-tls-cert-file")
+	a.tlsKeyFile = flags.MustString("api-tls-key-file")
+	a.startTimeout = flags.MustDuration("api-start-timeout")
+	a.timeout = flags.MustDuration("api-timeout")
+	a.bodyLimit = flags.MustHumanReadableBytes("api-body-limit")
 	a.rootPath = flags.MustString("api-root-path")
 	a.traceHeader = flags.MustString("api-trace-header")
+	a.downloadFromCfg = downloadFromConfig{
+		allowList: flags.MustRegexp("api-download-from-allow-list"),
+		denyList:  flags.MustRegexp("api-download-from-deny-list"),
+		maxRetry:  flags.MustInt("api-download-from-max-retry"),
+		disable:   flags.MustBool("api-disable-download-from"),
+	}
 	a.disableHealthCheckLogging = flags.MustBool("api-disable-health-check-logging")
 
 	// Port from env?
 	portEnvVar := flags.MustString("api-port-from-env")
 	if portEnvVar != "" {
-		val, ok := os.LookupEnv(portEnvVar)
-
-		if !ok {
-			return fmt.Errorf("environment variable '%s' does not exist", portEnvVar)
-		}
-
-		if val == "" {
-			return fmt.Errorf("environment variable '%s' is empty", portEnvVar)
-		}
-
-		port, err := strconv.Atoi(val)
+		port, err := gotenberg.IntEnv(portEnvVar)
 		if err != nil {
-			return fmt.Errorf("get int value of environment variable '%s': %w", portEnvVar, err)
+			return fmt.Errorf("get API port from env: %w", err)
 		}
-
 		a.port = port
 	}
 
+	// Enable basic auth?
+	enableBasicAuth := flags.MustBool("api-enable-basic-auth")
+	if enableBasicAuth {
+		basicAuthUsername, err := gotenberg.StringEnv("GOTENBERG_API_BASIC_AUTH_USERNAME")
+		if err != nil {
+			return fmt.Errorf("get basic auth username from env: %w", err)
+		}
+		basicAuthPassword, err := gotenberg.StringEnv("GOTENBERG_API_BASIC_AUTH_PASSWORD")
+		if err != nil {
+			return fmt.Errorf("get basic auth password from env: %w", err)
+		}
+		a.basicAuthUsername = basicAuthUsername
+		a.basicAuthPassword = basicAuthPassword
+	}
+
 	// Get routes from modules.
 	mods, err := ctx.Modules(new(Router))
 	if err != nil {
@@ -275,6 +301,7 @@ func (a *Api) Provision(ctx *gotenberg.Context) error {
 		}
 
 		a.healthChecks = append(a.healthChecks, checks...)
+		a.readyFn = append(a.readyFn, healthChecker.Ready)
 	}
 
 	// Logger.
@@ -291,7 +318,7 @@ func (a *Api) Provision(ctx *gotenberg.Context) error {
 	a.logger = logger
 
 	// File system.
-	a.fs = gotenberg.NewFileSystem()
+	a.fs = gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 	return nil
 }
@@ -306,6 +333,16 @@ func (a *Api) Validate() error {
 		)
 	}
 
+	if a.bindIp != "" && net.ParseIP(a.bindIp) == nil {
+		err = multierr.Append(err, errors.New("IP must be a valid IP address"))
+	}
+
+	if (a.tlsCertFile != "" && a.tlsKeyFile == "") || (a.tlsCertFile == "" && a.tlsKeyFile != "") {
+		err = multierr.Append(err,
+			errors.New("both TLS certificate and key files must be set"),
+		)
+	}
+
 	if !strings.HasPrefix(a.rootPath, "/") {
 		err = multierr.Append(err,
 			errors.New("root path must start with /"),
@@ -328,8 +365,9 @@ func (a *Api) Validate() error {
 		return err
 	}
 
-	routesMap := make(map[string]string, len(a.routes)+1)
+	routesMap := make(map[string]string, len(a.routes)+2)
 	routesMap["/health"] = "/health"
+	routesMap["/version"] = "/version"
 
 	for _, route := range a.routes {
 		if route.Path == "" {
@@ -373,10 +411,10 @@ func (a *Api) Start() error {
 	a.srv = echo.New()
 	a.srv.HideBanner = true
 	a.srv.HidePort = true
-	a.srv.Server.ReadTimeout = a.readTimeout
+	a.srv.Server.ReadTimeout = a.timeout
 	a.srv.Server.IdleTimeout = a.timeout
 	// See https://github.com/gotenberg/gotenberg/issues/396.
-	a.srv.Server.WriteTimeout = a.writeTimeout + a.writeTimeout
+	a.srv.Server.WriteTimeout = a.timeout + a.timeout
 	a.srv.HTTPErrorHandler = httpErrorHandler()
 
 	// Let's prepare the modules' routes.
@@ -411,19 +449,32 @@ func (a *Api) Start() error {
 			a.srv.Pre(externalMiddleware.Handler)
 		case MultipartStack:
 			externalMultipartMiddlewares = append(externalMultipartMiddlewares, externalMiddleware)
-		default:
+		case DefaultStack:
 			a.srv.Use(externalMiddleware.Handler)
 		}
 	}
 
 	hardTimeout := a.timeout + (time.Duration(5) * time.Second)
 
+	// Basic auth?
+	var securityMiddleware echo.MiddlewareFunc
+	if a.basicAuthUsername != "" {
+		securityMiddleware = basicAuthMiddleware(a.basicAuthUsername, a.basicAuthPassword)
+	} else {
+		securityMiddleware = func(next echo.HandlerFunc) echo.HandlerFunc {
+			return func(c echo.Context) error {
+				return next(c)
+			}
+		}
+	}
+
 	// Add the modules' routes and their specific middlewares.
 	for _, route := range a.routes {
 		var middlewares []echo.MiddlewareFunc
+		middlewares = append(middlewares, securityMiddleware)
 
 		if route.IsMultipart {
-			middlewares = append(middlewares, contextMiddleware(a.fs, a.timeout))
+			middlewares = append(middlewares, contextMiddleware(a.fs, a.timeout, a.bodyLimit, a.downloadFromCfg))
 
 			for _, externalMultipartMiddleware := range externalMultipartMiddlewares {
 				middlewares = append(middlewares, externalMultipartMiddleware.Handler)
@@ -440,22 +491,78 @@ func (a *Api) Start() error {
 		)
 	}
 
-	// Let's not forget the health check route.
+	// Root route.
+	a.srv.GET(
+		a.rootPath,
+		func(c echo.Context) error {
+			return c.HTML(http.StatusOK, `Hey, Gotenberg has no UI, it's an API. Head to the <a href="https://gotenberg.dev">documentation</a> to learn how to interact with it 🚀`)
+		},
+		securityMiddleware,
+	)
+
+	// Favicon route.
+	a.srv.GET(
+		fmt.Sprintf("%s%s", a.rootPath, "favicon.ico"),
+		func(c echo.Context) error {
+			return c.NoContent(http.StatusNoContent)
+		},
+		securityMiddleware,
+	)
+
+	// Let's not forget the health check routes...
+	checks := append(a.healthChecks, health.WithTimeout(a.timeout))
+	checker := health.NewChecker(checks...)
+	healthCheckHandler := health.NewHandler(checker)
+
 	a.srv.GET(
 		fmt.Sprintf("%s%s", a.rootPath, "health"),
 		func() echo.HandlerFunc {
-			checks := append(a.healthChecks, health.WithTimeout(a.timeout))
-			checker := health.NewChecker(checks...)
-
-			return echo.WrapHandler(health.NewHandler(checker))
+			return echo.WrapHandler(healthCheckHandler)
+		}(),
+		hardTimeoutMiddleware(hardTimeout),
+	)
+	a.srv.HEAD(
+		fmt.Sprintf("%s%s", a.rootPath, "health"),
+		func() echo.HandlerFunc {
+			return echo.WrapHandler(healthCheckHandler)
 		}(),
 		hardTimeoutMiddleware(hardTimeout),
 	)
 
+	// ...and the version route.
+	a.srv.GET(
+		fmt.Sprintf("%s%s", a.rootPath, "version"),
+		func(c echo.Context) error {
+			return c.String(http.StatusOK, gotenberg.Version)
+		},
+		securityMiddleware,
+	)
+
+	// Wait for all modules to be ready.
+	ctx, cancel := context.WithTimeout(context.Background(), a.startTimeout)
+	defer cancel()
+
+	eg, _ := errgroup.WithContext(ctx)
+	for _, f := range a.readyFn {
+		eg.Go(f)
+	}
+
+	err := eg.Wait()
+	if err != nil {
+		return fmt.Errorf("waiting for modules readiness: %w", err)
+	}
+
 	// As the following code is blocking, run it in a goroutine.
 	go func() {
-		server := &http2.Server{}
-		err := a.srv.StartH2CServer(fmt.Sprintf(":%d", a.port), server)
+		var err error
+		if a.tlsCertFile != "" && a.tlsKeyFile != "" {
+			// Start an HTTPS server (supports HTTP/2).
+			err = a.srv.StartTLS(fmt.Sprintf("%s:%d", a.bindIp, a.port), a.tlsCertFile, a.tlsKeyFile)
+		} else {
+			// Start an HTTP/2 Cleartext (non-HTTPS) server.
+			server := &http2.Server{}
+			err = a.srv.StartH2CServer(fmt.Sprintf("%s:%d", a.bindIp, a.port), server)
+		}
 		if !errors.Is(err, http.ErrServerClosed) {
 			a.logger.Fatal(err.Error())
 		}
@@ -466,7 +573,11 @@ func (a *Api) Start() error {
 
 // StartupMessage returns a custom startup message.
 func (a *Api) StartupMessage() string {
-	return fmt.Sprintf("server listening on port %d", a.port)
+	ip := a.bindIp
+	if a.bindIp == "" {
+		ip = "[::]"
+	}
+	return fmt.Sprintf("server started on %s:%d", ip, a.port)
 }
 
 // Stop stops the HTTP server.

pkg/modules/api/api_test.go

@@ -10,12 +10,13 @@ import (
 	"os"
 	"reflect"
 	"testing"
+	"time"
 
 	"github.com/alexliesenfeld/health"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestApi_Descriptor(t *testing.T) {
@@ -56,30 +57,6 @@ func TestApi_Provision(t *testing.T) {
 			}(),
 			expectError: true,
 		},
-		{
-			scenario: "port from env: empty environment variable",
-			ctx: func() *gotenberg.Context {
-				fs := new(Api).Descriptor().FlagSet
-				err := fs.Parse([]string{"--api-port-from-env=PORT"})
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: fs,
-					},
-					nil,
-				)
-			}(),
-			setEnv: func() {
-				err := os.Setenv("PORT", "")
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-			},
-			expectError: true,
-		},
 		{
 			scenario: "port from env: invalid environment variable value",
 			ctx: func() *gotenberg.Context {
@@ -104,6 +81,48 @@ func TestApi_Provision(t *testing.T) {
 			},
 			expectError: true,
 		},
+		{
+			scenario: "basic auth: non-existing GOTENBERG_API_BASIC_AUTH_USERNAME environment variable",
+			ctx: func() *gotenberg.Context {
+				fs := new(Api).Descriptor().FlagSet
+				err := fs.Parse([]string{"--api-enable-basic-auth=true"})
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: fs,
+					},
+					nil,
+				)
+			}(),
+			expectError: true,
+		},
+		{
+			scenario: "basic auth: non-existing GOTENBERG_API_BASIC_AUTH_PASSWORD environment variable",
+			ctx: func() *gotenberg.Context {
+				fs := new(Api).Descriptor().FlagSet
+				err := fs.Parse([]string{"--api-enable-basic-auth=true"})
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: fs,
+					},
+					nil,
+				)
+			}(),
+			setEnv: func() {
+				err := os.Setenv("GOTENBERG_API_BASIC_AUTH_USERNAME", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectError: true,
+		},
 		{
 			scenario: "no valid routers",
 			ctx: func() *gotenberg.Context {
@@ -222,9 +241,6 @@ func TestApi_Provision(t *testing.T) {
 				mod.ValidateMock = func() error {
 					return errors.New("foo")
 				}
-				mod.ChecksMock = func() ([]health.CheckerOption, error) {
-					return nil, nil
-				}
 				return gotenberg.NewContext(
 					gotenberg.ParsedFlags{
 						FlagSet: new(Api).Descriptor().FlagSet,
@@ -347,6 +363,9 @@ func TestApi_Provision(t *testing.T) {
 				mod3.ChecksMock = func() ([]health.CheckerOption, error) {
 					return []health.CheckerOption{health.WithDisabledAutostart()}, nil
 				}
+				mod3.ReadyMock = func() error {
+					return nil
+				}
 
 				mod4 := &struct {
 					gotenberg.ModuleMock
@@ -360,7 +379,7 @@ func TestApi_Provision(t *testing.T) {
 				}
 
 				fs := new(Api).Descriptor().FlagSet
-				err := fs.Parse([]string{"--api-port-from-env=PORT"})
+				err := fs.Parse([]string{"--api-port-from-env=PORT", "--api-enable-basic-auth=true"})
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
@@ -382,6 +401,14 @@ func TestApi_Provision(t *testing.T) {
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
+				err = os.Setenv("GOTENBERG_API_BASIC_AUTH_USERNAME", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				err = os.Setenv("GOTENBERG_API_BASIC_AUTH_PASSWORD", "bar")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
 			},
 			expectPort: 1337,
 			expectMiddlewares: []Middleware{
@@ -435,6 +462,9 @@ func TestApi_Validate(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
 		port        int
+		bindIp      string
+		tlsCertFile string
+		tlsKeyFile  string
 		rootPath    string
 		traceHeader string
 		routes      []Route
@@ -444,6 +474,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid port (< 1)",
 			port:        0,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -453,6 +484,39 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid port (> 65535)",
 			port:        65536,
+			bindIp:      "127.0.0.1",
+			rootPath:    "/foo/",
+			traceHeader: "foo",
+			routes:      nil,
+			middlewares: nil,
+			expectError: true,
+		},
+		{
+			scenario:    "invalid IP",
+			port:        10,
+			bindIp:      "foo",
+			rootPath:    "/foo/",
+			traceHeader: "foo",
+			routes:      nil,
+			middlewares: nil,
+			expectError: true,
+		},
+		{
+			scenario:    "invalid TLS files: only cert file provided",
+			port:        10,
+			bindIp:      "127.0.0.1",
+			tlsCertFile: "cert.pem",
+			rootPath:    "/foo/",
+			traceHeader: "foo",
+			routes:      nil,
+			middlewares: nil,
+			expectError: true,
+		},
+		{
+			scenario:    "invalid TLS files: only key file provided",
+			port:        10,
+			bindIp:      "127.0.0.1",
+			tlsKeyFile:  "key.pem",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -462,6 +526,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid root path: missing / prefix",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -471,6 +536,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid root path: missing / suffix",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo",
 			traceHeader: "foo",
 			routes:      nil,
@@ -480,6 +546,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid trace header",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "",
 			routes:      nil,
@@ -489,6 +556,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: empty path",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -502,6 +570,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: missing / prefix in path",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -515,6 +584,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid multipart route: no /forms prefix in path",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -529,6 +599,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: no method",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -543,6 +614,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: nil handler",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -558,6 +630,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: path already existing",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -578,6 +651,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid middleware: nil handler",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -592,6 +666,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "success",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -620,10 +695,34 @@ func TestApi_Validate(t *testing.T) {
 				},
 			},
 		},
+		{
+			scenario:    "success with TLS",
+			port:        10,
+			tlsCertFile: "cert.pem",
+			tlsKeyFile:  "key.pem",
+			rootPath:    "/foo/",
+			traceHeader: "foo",
+			routes: []Route{
+				{
+					Method:  http.MethodGet,
+					Path:    "/foo",
+					Handler: func(_ echo.Context) error { return nil },
+				},
+				{
+					Method:      http.MethodGet,
+					Path:        "/forms/foo",
+					Handler:     func(_ echo.Context) error { return nil },
+					IsMultipart: true,
+				},
+			},
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			mod := Api{
 				port:                tc.port,
+				bindIp:              tc.bindIp,
+				tlsCertFile:         tc.tlsCertFile,
+				tlsKeyFile:          tc.tlsKeyFile,
 				rootPath:            tc.rootPath,
 				traceHeader:         tc.traceHeader,
 				routes:              tc.routes,
@@ -643,154 +742,259 @@ func TestApi_Validate(t *testing.T) {
 }
 
 func TestApi_Start(t *testing.T) {
-	mod := new(Api)
-	mod.port = 3000
-	mod.rootPath = "/"
-	mod.disableHealthCheckLogging = true
-	mod.routes = []Route{
+	for _, tc := range []struct {
+		scenario    string
+		readyFn     []func() error
+		tlsCertFile string
+		tlsKeyFile  string
+		expectError bool
+	}{
 		{
-			Method:         http.MethodPost,
-			Path:           "/forms/foo",
-			IsMultipart:    true,
-			DisableLogging: true,
-			Handler: func(c echo.Context) error {
-				ctx := c.Get("context").(*Context)
-				ctx.outputPaths = []string{
-					"/tests/test/testdata/api/sample1.txt",
-				}
-
-				return nil
+			scenario: "at least one module not ready",
+			readyFn: []func() error{
+				func() error { return nil },
+				func() error { return errors.New("not ready") },
 			},
+			expectError: true,
 		},
 		{
-			Method:      http.MethodPost,
-			Path:        "/forms/bar",
-			IsMultipart: true,
-			Handler:     func(_ echo.Context) error { return errors.New("foo") },
-		},
-	}
-	mod.externalMiddlewares = []Middleware{
-		{
-			Stack: PreRouterStack,
-			Handler: func() echo.MiddlewareFunc {
-				return func(next echo.HandlerFunc) echo.HandlerFunc {
-					return func(c echo.Context) error {
-						return next(c)
-					}
-				}
-			}(),
+			scenario: "success",
+			readyFn: []func() error{
+				func() error { return nil },
+				func() error { return nil },
+			},
+			expectError: false,
 		},
 		{
-			Stack: MultipartStack,
-			Handler: func() echo.MiddlewareFunc {
-				return func(next echo.HandlerFunc) echo.HandlerFunc {
-					return func(c echo.Context) error {
-						return next(c)
-					}
-				}
-			}(),
+			scenario: "success with TLS",
+			readyFn: []func() error{
+				func() error { return nil },
+				func() error { return nil },
+			},
+			tlsCertFile: "/tests/test/testdata/api/cert.pem",
+			tlsKeyFile:  "/tests/test/testdata/api/key.pem",
+			expectError: false,
 		},
-		{
-			Stack: DefaultStack,
-			Handler: func() echo.MiddlewareFunc {
-				return func(next echo.HandlerFunc) echo.HandlerFunc {
-					return func(c echo.Context) error {
-						return next(c)
-					}
-				}
-			}(),
-		},
-		{
-			Handler: func() echo.MiddlewareFunc {
-				return func(next echo.HandlerFunc) echo.HandlerFunc {
-					return func(c echo.Context) error {
-						return next(c)
-					}
-				}
-			}(),
-		},
-	}
-	mod.fs = gotenberg.NewFileSystem()
-	mod.logger = zap.NewNop()
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := new(Api)
+			mod.port = 3000
+			mod.tlsCertFile = tc.tlsCertFile
+			mod.tlsKeyFile = tc.tlsKeyFile
+			mod.startTimeout = time.Duration(30) * time.Second
+			mod.rootPath = "/"
+			mod.basicAuthUsername = "foo"
+			mod.basicAuthPassword = "bar"
+			mod.disableHealthCheckLogging = true
+			mod.routes = []Route{
+				{
+					Method:         http.MethodPost,
+					Path:           "/forms/foo",
+					IsMultipart:    true,
+					DisableLogging: true,
+					Handler: func(c echo.Context) error {
+						ctx := c.Get("context").(*Context)
+						ctx.outputPaths = []string{
+							"/tests/test/testdata/api/sample1.txt",
+						}
 
-	err := mod.Start()
-	if err != nil {
-		t.Fatalf("expected no error but got: %v", err)
-	}
+						return nil
+					},
+				},
+				{
+					Method:      http.MethodPost,
+					Path:        "/forms/bar",
+					IsMultipart: true,
+					Handler:     func(_ echo.Context) error { return errors.New("foo") },
+				},
+			}
+			mod.externalMiddlewares = []Middleware{
+				{
+					Stack: PreRouterStack,
+					Handler: func() echo.MiddlewareFunc {
+						return func(next echo.HandlerFunc) echo.HandlerFunc {
+							return func(c echo.Context) error {
+								return next(c)
+							}
+						}
+					}(),
+				},
+				{
+					Stack: MultipartStack,
+					Handler: func() echo.MiddlewareFunc {
+						return func(next echo.HandlerFunc) echo.HandlerFunc {
+							return func(c echo.Context) error {
+								return next(c)
+							}
+						}
+					}(),
+				},
+				{
+					Stack: DefaultStack,
+					Handler: func() echo.MiddlewareFunc {
+						return func(next echo.HandlerFunc) echo.HandlerFunc {
+							return func(c echo.Context) error {
+								return next(c)
+							}
+						}
+					}(),
+				},
+				{
+					Handler: func() echo.MiddlewareFunc {
+						return func(next echo.HandlerFunc) echo.HandlerFunc {
+							return func(c echo.Context) error {
+								return next(c)
+							}
+						}
+					}(),
+				},
+			}
+			mod.readyFn = tc.readyFn
+			mod.fs = gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+			mod.logger = zap.NewNop()
 
-	// health request.
-	recorder := httptest.NewRecorder()
-	healthRequest := httptest.NewRequest(http.MethodGet, "/health", nil)
-
-	mod.srv.ServeHTTP(recorder, healthRequest)
-	if recorder.Code != http.StatusOK {
-		t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
-	}
-
-	// "multipart/form-data" request.
-	multipartRequest := func(url string) *http.Request {
-		body := &bytes.Buffer{}
-
-		writer := multipart.NewWriter(body)
-
-		defer func() {
-			err := writer.Close()
-			if err != nil {
+			err := mod.Start()
+			if !tc.expectError && err != nil {
 				t.Fatalf("expected no error but got: %v", err)
 			}
-		}()
 
-		err := writer.WriteField("foo", "foo")
-		if err != nil {
-			t.Fatalf("expected no error but got: %v", err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
 
-		part, err := writer.CreateFormFile("foo.txt", "foo.txt")
-		if err != nil {
-			t.Fatalf("expected no error but got: %v", err)
-		}
+			if tc.expectError {
+				return
+			}
 
-		_, err = part.Write([]byte("foo"))
-		if err != nil {
-			t.Fatalf("expected no error but got: %v", err)
-		}
+			// root request.
+			recorder := httptest.NewRecorder()
+			rootRequest := httptest.NewRequest(http.MethodGet, "/", nil)
+			rootRequest.SetBasicAuth(mod.basicAuthUsername, mod.basicAuthPassword)
+			mod.srv.ServeHTTP(recorder, rootRequest)
+			if recorder.Code != http.StatusOK {
+				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
+			}
 
-		req := httptest.NewRequest(http.MethodPost, url, body)
-		req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+			// favicon request.
+			recorder = httptest.NewRecorder()
+			faviconRequest := httptest.NewRequest(http.MethodGet, "/favicon.ico", nil)
+			faviconRequest.SetBasicAuth(mod.basicAuthUsername, mod.basicAuthPassword)
+			mod.srv.ServeHTTP(recorder, faviconRequest)
+			if recorder.Code != http.StatusNoContent {
+				t.Errorf("expected %d status code but got %d", http.StatusNoContent, recorder.Code)
+			}
 
-		return req
-	}
+			// health requests.
+			recorder = httptest.NewRecorder()
+			healthGetRequest := httptest.NewRequest(http.MethodGet, "/health", nil)
+			mod.srv.ServeHTTP(recorder, healthGetRequest)
+			if recorder.Code != http.StatusOK {
+				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
+			}
 
-	recorder = httptest.NewRecorder()
-	mod.srv.ServeHTTP(recorder, multipartRequest("/forms/foo"))
+			recorder = httptest.NewRecorder()
+			healthHeadRequest := httptest.NewRequest(http.MethodHead, "/health", nil)
+			mod.srv.ServeHTTP(recorder, healthHeadRequest)
+			if recorder.Code != http.StatusOK {
+				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
+			}
 
-	if recorder.Code != http.StatusOK {
-		t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
-	}
+			// version request.
+			recorder = httptest.NewRecorder()
+			versionRequest := httptest.NewRequest(http.MethodGet, "/version", nil)
+			versionRequest.SetBasicAuth(mod.basicAuthUsername, mod.basicAuthPassword)
+			mod.srv.ServeHTTP(recorder, versionRequest)
+			if recorder.Code != http.StatusOK {
+				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
+			}
 
-	recorder = httptest.NewRecorder()
-	mod.srv.ServeHTTP(recorder, multipartRequest("/forms/bar"))
+			// "multipart/form-data" request.
+			multipartRequest := func(url string) *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
 
-	if recorder.Code != http.StatusInternalServerError {
-		t.Errorf("expected %d status code but got %d", http.StatusInternalServerError, recorder.Code)
-	}
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
 
-	err = mod.srv.Shutdown(context.TODO())
-	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
+				err := writer.WriteField("foo", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				part, err := writer.CreateFormFile("foo.txt", "foo.txt")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				_, err = part.Write([]byte("foo"))
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				req := httptest.NewRequest(http.MethodPost, url, body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				req.SetBasicAuth(mod.basicAuthUsername, mod.basicAuthPassword)
+
+				return req
+			}
+
+			recorder = httptest.NewRecorder()
+			mod.srv.ServeHTTP(recorder, multipartRequest("/forms/foo"))
+
+			if recorder.Code != http.StatusOK {
+				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
+			}
+
+			recorder = httptest.NewRecorder()
+			mod.srv.ServeHTTP(recorder, multipartRequest("/forms/bar"))
+
+			if recorder.Code != http.StatusInternalServerError {
+				t.Errorf("expected %d status code but got %d", http.StatusInternalServerError, recorder.Code)
+			}
+
+			err = mod.srv.Shutdown(context.TODO())
+			if err != nil {
+				t.Errorf("expected no error but got: %v", err)
+			}
+		})
 	}
 }
 
 func TestApi_StartupMessage(t *testing.T) {
-	mod := Api{
-		port: 3000,
-	}
+	for _, tc := range []struct {
+		scenario      string
+		port          int
+		bindIp        string
+		expectMessage string
+	}{
+		{
+			scenario:      "no custom IP",
+			port:          3000,
+			bindIp:        "",
+			expectMessage: "server started on [::]:3000",
+		},
+		{
+			scenario:      "custom IP",
+			port:          3000,
+			bindIp:        "127.0.0.1",
+			expectMessage: "server started on 127.0.0.1:3000",
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := Api{
+				port:   tc.port,
+				bindIp: tc.bindIp,
+			}
 
-	actual := mod.StartupMessage()
-	expect := "server listening on port 3000"
-
-	if actual != expect {
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
+			actual := mod.StartupMessage()
+			if actual != tc.expectMessage {
+				t.Errorf("expected '%s' but got '%s'", tc.expectMessage, actual)
+			}
+		})
 	}
 }
 

pkg/modules/api/context.go

@@ -3,26 +3,28 @@ package api
 import (
 	"compress/flate"
 	"context"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
+	"mime"
 	"mime/multipart"
 	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
+	"sync/atomic"
 	"time"
-	"unicode"
 
 	"github.com/google/uuid"
+	"github.com/hashicorp/go-retryablehttp"
 	"github.com/labstack/echo/v4"
 	"github.com/mholt/archiver/v3"
 	"go.uber.org/zap"
-	"golang.org/x/text/runes"
-	"golang.org/x/text/transform"
+	"golang.org/x/sync/errgroup"
 	"golang.org/x/text/unicode/norm"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 var (
@@ -37,27 +39,76 @@ var (
 
 // Context is the request context for a "multipart/form-data" requests.
 type Context struct {
-	dirPath string
-	values  map[string][]string
-	files   map[string]string
-
+	dirPath     string
+	values      map[string][]string
+	files       map[string]string
 	outputPaths []string
+	cancelled   bool
 
-	cancelled bool
-	logger    *zap.Logger
-	echoCtx   echo.Context
+	logger     *zap.Logger
+	echoCtx    echo.Context
+	mkdirAll   gotenberg.MkdirAll
+	pathRename gotenberg.PathRename
 	context.Context
 }
 
+type trackingReader struct {
+	R            io.Reader
+	AddReadBytes func(n int64) error
+}
+
+func (t *trackingReader) Read(p []byte) (int, error) {
+	n, err := t.R.Read(p)
+	if n > 0 {
+		errAddRead := t.AddReadBytes(int64(n))
+		if errAddRead != nil {
+			return n, fmt.Errorf("add read bytes: %w", errAddRead)
+		}
+	}
+	if err != nil {
+		// It's a common practice in Go to return io.EOF unwrapped to signal
+		// the end of a data stream. Wrapping it can lead to unexpected
+		// behavior in standard library functions.
+		return n, err
+	}
+	return n, nil
+}
+
+type downloadFrom struct {
+	// Url is the URL to download a file from.
+	Url string `json:"url"`
+
+	// ExtraHttpHeaders are the HTTP headers to send alongside.
+	ExtraHttpHeaders map[string]string `json:"extraHttpHeaders"`
+}
+
 // newContext returns a [Context] by parsing a "multipart/form-data" request.
-func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSystem, timeout time.Duration) (*Context, context.CancelFunc, error) {
+func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSystem, timeout time.Duration, bodyLimit int64, downloadFromCfg downloadFromConfig, traceHeader, trace string) (*Context, context.CancelFunc, error) {
 	processCtx, processCancel := context.WithTimeout(context.Background(), timeout)
 
+	// We want to make sure the multipart/form-data does not exceed a given
+	// limit. We consider: form fields (keys, values, files) and files
+	// downloaded remotely ("download from" feature).
+	var totalBytesRead atomic.Int64
+
+	addReadBytes := func(n int64) error {
+		newTotal := totalBytesRead.Add(n)
+		if bodyLimit != 0 && newTotal > bodyLimit {
+			return WrapError(
+				fmt.Errorf("body limit reached (> %d)", bodyLimit),
+				NewSentinelHttpError(http.StatusRequestEntityTooLarge, http.StatusText(http.StatusRequestEntityTooLarge)),
+			)
+		}
+		return nil
+	}
+
 	ctx := &Context{
 		outputPaths: make([]string, 0),
 		cancelled:   false,
 		logger:      logger,
 		echoCtx:     echoCtx,
+		mkdirAll:    new(gotenberg.OsMkdirAll),
+		pathRename:  new(gotenberg.OsPathRename),
 		Context:     processCtx,
 	}
 
@@ -89,7 +140,6 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 
 	form, err := echoCtx.MultipartForm()
 	if err != nil {
-
 		if errors.Is(err, http.ErrNotMultipart) {
 			return nil, cancel, WrapError(
 				fmt.Errorf("get multipart form: %w", err),
@@ -114,6 +164,19 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 		return nil, cancel, fmt.Errorf("get multipart form: %w", err)
 	}
 
+	// This will ensure we do not exceed the body limit.
+	var formValuesSize int64
+	for key, valArray := range form.Value {
+		formValuesSize += int64(len(key))
+		for _, val := range valArray {
+			formValuesSize += int64(len(val))
+		}
+	}
+	err = addReadBytes(formValuesSize)
+	if err != nil {
+		return nil, cancel, fmt.Errorf("add read bytes: %w", err)
+	}
+
 	dirPath, err := fs.MkdirAll()
 	if err != nil {
 		return nil, cancel, fmt.Errorf("create working directory: %w", err)
@@ -123,16 +186,151 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 	ctx.values = form.Value
 	ctx.files = make(map[string]string)
 
-	copyToDisk := func(fh *multipart.FileHeader) error {
-		// Avoid directory traversal and normalize filename.
-		// See https://github.com/gotenberg/gotenberg/issues/104.
-		t := transform.Chain(norm.NFD, runes.Remove(runes.In(unicode.Mn)), norm.NFC)
-
-		filename, _, err := transform.String(t, filepath.Base(fh.Filename))
+	// First, try to download files listed in the "downloadFrom" form field, if
+	// any.
+	raw, ok := ctx.values["downloadFrom"]
+	if !downloadFromCfg.disable && ok {
+		var dls []downloadFrom
+		err = json.Unmarshal([]byte(raw[0]), &dls)
 		if err != nil {
-			return fmt.Errorf("transform filename: %w", err)
+			return nil, cancel, WrapError(
+				fmt.Errorf("unmarshal json: %w", err),
+				NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Invalid 'downloadFrom' form field value: %s", err)),
+			)
 		}
 
+		eg, _ := errgroup.WithContext(ctx)
+		for i, dl := range dls {
+			eg.Go(func() error {
+				deadline, ok := ctx.Deadline()
+				if !ok {
+					// Should not happen, as context is created with a timeout.
+					return errors.New("context has no deadline")
+				}
+
+				if strings.TrimSpace(dl.Url) == "" {
+					return WrapError(
+						errors.New("empty download from URL"),
+						NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Invalid 'downloadFrom' form field entry %d: URL must be set", i)),
+					)
+				}
+
+				err := gotenberg.FilterDeadline(downloadFromCfg.allowList, downloadFromCfg.denyList, dl.Url, deadline)
+				if err != nil {
+					return fmt.Errorf("filter URL: %w", err)
+				}
+
+				logger.Debug(fmt.Sprintf("download file from '%s'", dl.Url))
+
+				req, err := retryablehttp.NewRequest(http.MethodGet, dl.Url, nil)
+				if err != nil {
+					return fmt.Errorf("create request to '%s': %w", dl.Url, err)
+				}
+
+				req.Header.Set("User-Agent", "Gotenberg")
+				for key, value := range dl.ExtraHttpHeaders {
+					req.Header.Set(key, value)
+				}
+				req.Header.Set(traceHeader, trace)
+
+				client := &retryablehttp.Client{
+					HTTPClient: &http.Client{
+						Timeout: time.Until(deadline),
+					},
+					RetryMax:     downloadFromCfg.maxRetry,
+					RetryWaitMin: time.Duration(1) * time.Second,
+					RetryWaitMax: time.Until(deadline),
+					Logger:       gotenberg.NewLeveledLogger(logger),
+					CheckRetry:   retryablehttp.DefaultRetryPolicy,
+					Backoff:      retryablehttp.DefaultBackoff,
+				}
+
+				resp, err := client.Do(req)
+				if err != nil {
+					return WrapError(
+						fmt.Errorf("download file from to '%s': %w", dl.Url, err),
+						NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Unable to download file from '%s': %s", dl.Url, err)),
+					)
+				}
+				defer func() {
+					err := resp.Body.Close()
+					if err != nil {
+						logger.Error(fmt.Sprintf("close response body from '%s': %s", dl.Url, err))
+					}
+				}()
+
+				if resp.StatusCode != http.StatusOK {
+					return WrapError(
+						fmt.Errorf("download file from to '%s': got status: '%s'", dl.Url, resp.Status),
+						NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Unable to download file from '%s': got status: '%s'", dl.Url, resp.Status)),
+					)
+				}
+
+				contentDisposition := resp.Header.Get("Content-Disposition")
+				if contentDisposition == "" {
+					return WrapError(
+						fmt.Errorf("no 'Content-Disposition' header from '%s'", dl.Url),
+						NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("No 'Content-Disposition' header from '%s'", dl.Url)),
+					)
+				}
+
+				// FIXME: the implementation of this method might not be
+				//  complete, as it fails to parse an empty mediatype.
+				//  See: https://github.com/golang/go/issues/69551.
+				_, params, err := mime.ParseMediaType(contentDisposition)
+				if err != nil {
+					return WrapError(
+						fmt.Errorf("parse 'Content-Disposition' header '%s' from '%s': %w", contentDisposition, dl.Url, err),
+						NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Invalid 'Content-Disposition' header '%s' from '%s': %s", contentDisposition, dl.Url, err)),
+					)
+				}
+
+				filename, ok := params["filename"]
+				if !ok {
+					return WrapError(
+						fmt.Errorf("get filename from 'Content-Disposition' header '%s' from '%s'", contentDisposition, dl.Url),
+						NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Invalid 'Content-Disposition' header '%s' from '%s': no filename", contentDisposition, dl.Url)),
+					)
+				}
+
+				// Avoid directory traversal and make sure filename characters are
+				// normalized.
+				// See: https://github.com/gotenberg/gotenberg/issues/662.
+				filename = norm.NFC.String(filepath.Base(filename))
+				path := fmt.Sprintf("%s/%s", ctx.dirPath, filename)
+
+				out, err := os.Create(path)
+				if err != nil {
+					return fmt.Errorf("create local file: %w", err)
+				}
+				defer func() {
+					err := out.Close()
+					if err != nil {
+						logger.Error(fmt.Sprintf("close local file: %s", err))
+					}
+				}()
+
+				// This will ensure we do not exceed the body limit.
+				reader := &trackingReader{R: resp.Body, AddReadBytes: addReadBytes}
+
+				_, err = io.Copy(out, reader)
+				if err != nil {
+					return fmt.Errorf("copy downloaded file from '%s' to local file: %w", dl.Url, err)
+				}
+
+				ctx.files[filename] = path
+
+				return nil
+			})
+		}
+
+		err = eg.Wait()
+		if err != nil {
+			return ctx, cancel, err
+		}
+	}
+
+	copyToDisk := func(fh *multipart.FileHeader) error {
 		in, err := fh.Open()
 		if err != nil {
 			return fmt.Errorf("open multipart file: %w", err)
@@ -145,13 +343,19 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 			}
 		}()
 
+		// This will ensure we do not exceed the body limit.
+		reader := &trackingReader{R: in, AddReadBytes: addReadBytes}
+
+		// Avoid directory traversal and make sure filename characters are
+		// normalized.
+		// See: https://github.com/gotenberg/gotenberg/issues/662.
+		filename := norm.NFC.String(filepath.Base(fh.Filename))
 		path := fmt.Sprintf("%s/%s", ctx.dirPath, filename)
 
 		out, err := os.Create(path)
 		if err != nil {
 			return fmt.Errorf("create local file: %w", err)
 		}
-
 		defer func() {
 			err := out.Close()
 			if err != nil {
@@ -159,7 +363,7 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 			}
 		}()
 
-		_, err = io.Copy(out, in)
+		_, err = io.Copy(out, reader)
 		if err != nil {
 			return fmt.Errorf("copy multipart file to local file: %w", err)
 		}
@@ -169,10 +373,10 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 		return nil
 	}
 
+	// Then, copy the form files, if any.
 	for _, files := range form.File {
 		for _, fh := range files {
 			err = copyToDisk(fh)
-
 			if err != nil {
 				return ctx, cancel, fmt.Errorf("copy to disk: %w", err)
 			}
@@ -181,6 +385,7 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 
 	ctx.Log().Debug(fmt.Sprintf("form fields: %+v", ctx.values))
 	ctx.Log().Debug(fmt.Sprintf("form files: %+v", ctx.files))
+	ctx.Log().Debug(fmt.Sprintf("total bytes: %d", totalBytesRead.Load()))
 
 	return ctx, cancel, err
 }
@@ -199,10 +404,32 @@ func (ctx *Context) FormData() *FormData {
 	}
 }
 
-// GeneratePath generates a path within the context's working directory. It
-// does not create a file.
+// GeneratePath generates a path within the context's working directory.
+// It generates a new UUID-based filename. It does not create a file.
 func (ctx *Context) GeneratePath(extension string) string {
-	return fmt.Sprintf("%s/%s%s", ctx.dirPath, uuid.New(), extension)
+	return fmt.Sprintf("%s/%s%s", ctx.dirPath, uuid.New().String(), extension)
+}
+
+// CreateSubDirectory creates a subdirectory within the context's working
+// directory.
+func (ctx *Context) CreateSubDirectory(dirName string) (string, error) {
+	path := fmt.Sprintf("%s/%s", ctx.dirPath, dirName)
+	err := ctx.mkdirAll.MkdirAll(path, 0o755)
+	if err != nil {
+		return "", fmt.Errorf("create sub-directory %s: %w", path, err)
+	}
+	return path, nil
+}
+
+// Rename is just a wrapper around [os.Rename], as we need to mock this
+// behavior in our tests.
+func (ctx *Context) Rename(oldpath, newpath string) error {
+	ctx.Log().Debug(fmt.Sprintf("rename %s to %s", oldpath, newpath))
+	err := ctx.pathRename.Rename(oldpath, newpath)
+	if err != nil {
+		return fmt.Errorf("rename path: %w", err)
+	}
+	return nil
 }
 
 // AddOutputPaths adds the given paths. Those paths will be used later to build

pkg/modules/api/context_test.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"mime/multipart"
 	"net/http"
@@ -12,16 +13,36 @@ import (
 	"testing"
 	"time"
 
+	"github.com/dlclark/regexp2"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestNewContext(t *testing.T) {
+	defaultAllowList, err := regexp2.Compile("", 0)
+	if err != nil {
+		t.Fatalf("expected no error but got: %v", err)
+	}
+	defaultDenyList, err := regexp2.Compile("", 0)
+	if err != nil {
+		t.Fatalf("expected no error but got: %v", err)
+	}
+	defaultDownloadFromCfg := downloadFromConfig{
+		allowList: defaultAllowList,
+		denyList:  defaultDenyList,
+		maxRetry:  1,
+		disable:   false,
+	}
+
 	for _, tc := range []struct {
 		scenario         string
 		request          *http.Request
+		bodyLimit        int64
+		downloadFromCfg  downloadFromConfig
+		downloadFromSrv  *echo.Echo
+		expectContext    *Context
 		expectError      bool
 		expectHttpError  bool
 		expectHttpStatus int
@@ -67,6 +88,325 @@ func TestNewContext(t *testing.T) {
 			expectHttpError:  true,
 			expectHttpStatus: http.StatusBadRequest,
 		},
+		{
+			scenario: "request entity too large: form values",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("key", "value")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			bodyLimit:        1,
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusRequestEntityTooLarge,
+		},
+		{
+			scenario: "request entity too large: downloadFrom",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			bodyLimit: 45, // form values = 44 bytes.
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					c.Response().Header().Set(echo.HeaderContentDisposition, `attachment; filename="bar.txt"`)
+					c.Response().Header().Set(echo.HeaderContentType, "text/plain")
+					return c.String(http.StatusOK, http.StatusText(http.StatusOK))
+				})
+				return srv
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusRequestEntityTooLarge,
+		},
+		{
+			scenario: "request entity too large: form files",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				part, err := writer.CreateFormFile("foo.txt", "foo.txt")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				_, err = part.Write([]byte("foo"))
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			bodyLimit:        1,
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusRequestEntityTooLarge,
+		},
+		{
+			scenario: "invalid downloadFrom form field: cannot unmarshal",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
+		{
+			scenario: "invalid downloadFrom form field: no URL",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
+		{
+			scenario: "invalid downloadFrom form field: filtered URL",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"https://foo.bar"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromCfg: func() downloadFromConfig {
+				denyList, err := regexp2.Compile("https://foo.bar", 0)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				return downloadFromConfig{allowList: defaultAllowList, denyList: denyList, maxRetry: 1, disable: false}
+			}(),
+			expectError: true,
+		},
+		{
+			scenario: "invalid downloadFrom form field: unreachable URL",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
+		{
+			scenario: "invalid downloadFrom form field: invalid status code",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					return c.String(http.StatusNotFound, http.StatusText(http.StatusNotFound))
+				})
+				return srv
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
+		{
+			scenario: "invalid downloadFrom form field: no 'Content-Disposition' header",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					return c.String(http.StatusOK, http.StatusText(http.StatusOK))
+				})
+				return srv
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
+		{
+			scenario: "invalid downloadFrom form field: malformed 'Content-Disposition' header",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					c.Response().Header().Set(echo.HeaderContentDisposition, ";;")
+					return c.String(http.StatusOK, http.StatusText(http.StatusOK))
+				})
+				return srv
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
+		{
+			scenario: "invalid downloadFrom form field: no filename parameter in 'Content-Disposition' header",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					c.Response().Header().Set(echo.HeaderContentDisposition, "inline;")
+					return c.String(http.StatusOK, http.StatusText(http.StatusOK))
+				})
+				return srv
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
+		},
 		{
 			scenario: "success",
 			request: func() *http.Request {
@@ -90,17 +430,69 @@ func TestNewContext(t *testing.T) {
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
+				err = writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/","extraHttpHeaders":{"X-Foo":"Bar"}}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
 				req := httptest.NewRequest(http.MethodPost, "/", body)
 				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
 				return req
 			}(),
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					if c.Request().Header.Get("User-Agent") != "Gotenberg" {
+						t.Fatalf("expected 'Gotenberg' from header 'User-Agent', but got '%s'", c.Request().Header.Get("User-Agent"))
+					}
+					if c.Request().Header.Get("X-Foo") != "Bar" {
+						t.Fatalf("expected 'Bar' from header 'X-Foo', but got '%s'", c.Request().Header.Get("X-Foo"))
+					}
+					if c.Request().Header.Get("Gotenberg-Trace") != "123" {
+						t.Fatalf("expected '123' from header 'Gotenberg-Trace', but got '%s'", c.Request().Header.Get("Gotenberg-Trace"))
+					}
+					c.Response().Header().Set(echo.HeaderContentDisposition, `attachment; filename="bar.txt"`)
+					c.Response().Header().Set(echo.HeaderContentType, "text/plain")
+					return c.String(http.StatusOK, http.StatusText(http.StatusOK))
+				})
+				return srv
+			}(),
+			downloadFromCfg: defaultDownloadFromCfg,
+			expectContext: &Context{
+				values: map[string][]string{
+					"foo": {"foo"},
+					"downloadFrom": {
+						`[{"url":"http://localhost:80/","extraHttpHeaders":{"X-Foo":"Bar"}}]`,
+					},
+				},
+				files: map[string]string{
+					"foo.txt": "foo.txt",
+					"bar.txt": "bar.txt", // downloadFrom.
+				},
+			},
 			expectError:     false,
 			expectHttpError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
+			if tc.downloadFromSrv != nil {
+				go func() {
+					err := tc.downloadFromSrv.Start(":80")
+					if !errors.Is(err, http.ErrServerClosed) {
+						t.Error(err)
+						return
+					}
+				}()
+				defer func() {
+					err := tc.downloadFromSrv.Shutdown(context.TODO())
+					if err != nil {
+						t.Error(err)
+					}
+				}()
+			}
+
 			handler := func(c echo.Context) error {
-				_, cancel, err := newContext(c, zap.NewNop(), gotenberg.NewFileSystem(), time.Duration(10)*time.Second)
+				ctx, cancel, err := newContext(c, zap.NewNop(), gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll)), time.Duration(10)*time.Second, tc.bodyLimit, tc.downloadFromCfg, "Gotenberg-Trace", "123")
 				defer cancel()
 				// Context already cancelled.
 				defer cancel()
@@ -109,6 +501,20 @@ func TestNewContext(t *testing.T) {
 					return err
 				}
 
+				if tc.expectContext != nil {
+					if !reflect.DeepEqual(tc.expectContext.values, ctx.values) {
+						t.Fatalf("expected context.values to be %v but got %v", tc.expectContext.values, ctx.values)
+					}
+					if len(tc.expectContext.files) != len(ctx.files) {
+						t.Fatalf("expected context.files to contain %d items but got %d", len(tc.expectContext.files), len(ctx.files))
+					}
+					for key, value := range tc.expectContext.files {
+						if !strings.HasSuffix(ctx.files[key], value) {
+							t.Fatalf("expected context.files to contain '%s' but got '%s'", value, ctx.files[key])
+						}
+					}
+				}
+
 				return nil
 			}
 
@@ -185,18 +591,89 @@ func TestContext_FormData(t *testing.T) {
 	}
 }
 
+func TestContext_CreateSubDirectory(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		ctx         *Context
+		expectError bool
+	}{
+		{
+			scenario: "failure",
+			ctx: &Context{mkdirAll: &gotenberg.MkdirAllMock{MkdirAllMock: func(path string, perm os.FileMode) error {
+				return errors.New("cannot rename")
+			}}},
+			expectError: true,
+		},
+		{
+			scenario: "success",
+			ctx: &Context{mkdirAll: &gotenberg.MkdirAllMock{MkdirAllMock: func(path string, perm os.FileMode) error {
+				return nil
+			}}},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			tc.ctx.logger = zap.NewNop()
+			_, err := tc.ctx.CreateSubDirectory("foo")
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none", err)
+			}
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+		})
+	}
+}
+
 func TestContext_GeneratePath(t *testing.T) {
 	ctx := &Context{
 		dirPath: "/foo",
 	}
 
 	path := ctx.GeneratePath(".pdf")
-
 	if !strings.HasPrefix(path, ctx.dirPath) {
 		t.Errorf("expected '%s' to start with '%s'", path, ctx.dirPath)
 	}
 }
 
+func TestContext_Rename(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		ctx         *Context
+		expectError bool
+	}{
+		{
+			scenario: "failure",
+			ctx: &Context{pathRename: &gotenberg.PathRenameMock{RenameMock: func(oldpath, newpath string) error {
+				return errors.New("cannot rename")
+			}}},
+			expectError: true,
+		},
+		{
+			scenario: "success",
+			ctx: &Context{pathRename: &gotenberg.PathRenameMock{RenameMock: func(oldpath, newpath string) error {
+				return nil
+			}}},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			tc.ctx.logger = zap.NewNop()
+			err := tc.ctx.Rename("", "")
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none", err)
+			}
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+		})
+	}
+}
+
 func TestContext_AddOutputPaths(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
@@ -292,7 +769,7 @@ func TestContext_BuildOutputFile(t *testing.T) {
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
-			fs := gotenberg.NewFileSystem()
+			fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 			dirPath, err := fs.MkdirAll()
 			if err != nil {
 				t.Fatalf("expected no erro but got: %v", err)

pkg/modules/api/formdata.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"fmt"
+	"math"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -11,6 +12,8 @@ import (
 	"time"
 
 	"go.uber.org/multierr"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 // FormData is a helper for validating and hydrating values from a
@@ -143,6 +146,91 @@ func (form *FormData) MandatoryDuration(key string, target *time.Duration) *Form
 	return form.mustMandatoryField(key, target)
 }
 
+// Inches binds a form field to a float64 variable. It populates an error
+// if the value cannot be computed back to inches.
+//
+//	var foo float64
+//
+//	ctx.FormData().Inches("foo", &foo, 2.0)
+func (form *FormData) Inches(key string, target *float64, defaultValue float64) *FormData {
+	form.inches(key, target)
+	if *target == -math.MaxFloat64 {
+		*target = defaultValue
+	}
+	return form
+}
+
+// MandatoryInches binds a form field to a float64 variable. It populates
+// an error if the value cannot be computed back to inches, is empty, or the
+// "key" does not exist.
+//
+//	var foo float64
+//
+//	ctx.FormData().MandatoryInches("foo", &foo)
+func (form *FormData) MandatoryInches(key string, target *float64) *FormData {
+	val, ok := form.values[key]
+	if !ok || val[0] == "" {
+		form.append(
+			fmt.Errorf("form field '%s' is required", key),
+		)
+		return form
+	}
+	return form.inches(key, target)
+}
+
+// inches tries to compute a string value to inches.
+func (form *FormData) inches(key string, target *float64) *FormData {
+	var value string
+	form.mustValue(key, &value, "")
+
+	if value == "" {
+		*target = -math.MaxFloat64
+		return form
+	}
+
+	for _, unit := range []string{"pt", "px", "in", "mm", "cm", "pc"} {
+		if !strings.HasSuffix(value, unit) {
+			continue
+		}
+
+		val, err := strconv.ParseFloat(strings.TrimSuffix(value, unit), 64)
+		if err != nil {
+			form.append(
+				fmt.Errorf("form field '%s' is invalid (got '%s', resulting to %w)", key, value, err),
+			)
+			return form
+		}
+
+		switch unit {
+		case "pt":
+			*target = val * (1.0 / 72.0)
+		case "px":
+			*target = val * (1.0 / 96.0)
+		case "in":
+			*target = val
+		case "mm":
+			*target = val * (1.0 / 25.4)
+		case "cm":
+			*target = val * (1.0 / 2.54)
+		case "pc":
+			*target = val * (1.0 / 6.0)
+		}
+
+		return form
+	}
+
+	val, err := strconv.ParseFloat(value, 64)
+	if err != nil {
+		form.append(
+			fmt.Errorf("form field '%s' is invalid (got '%s', resulting to %w)", key, value, err),
+		)
+		return form
+	}
+
+	*target = val
+	return form
+}
+
 // Custom helps to define a custom binding function for a form field.
 //
 //	var foo map[string]string
@@ -304,7 +392,7 @@ func (form *FormData) paths(extensions []string, target *[]string) *FormData {
 	}
 
 	// See https://github.com/gotenberg/gotenberg/issues/139.
-	sort.Strings(*target)
+	sort.Sort(gotenberg.AlphanumericSort(*target))
 
 	return form
 }

pkg/modules/api/formdata_test.go

@@ -3,6 +3,7 @@ package api
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"reflect"
 	"testing"
 	"time"
@@ -768,6 +769,333 @@ func TestFormData_MandatoryDuration(t *testing.T) {
 	}
 }
 
+func TestFormData_Inches(t *testing.T) {
+	for _, tc := range []struct {
+		scenario     string
+		form         *FormData
+		defaultValue float64
+		expect       float64
+		expectError  bool
+	}{
+		{
+			scenario:     "key does not exist, fallback to default zero value",
+			form:         &FormData{},
+			defaultValue: 0.0,
+			expect:       0.0,
+			expectError:  false,
+		},
+		{
+			scenario:     "key does not exist, fallback to default value",
+			form:         &FormData{},
+			defaultValue: 2.5,
+			expect:       2.5,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist, but empty value, fallback to default value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       0.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist, value has a unit, but the rest is not float64 compatible",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"foomm",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       0.0,
+			expectError:  true,
+		},
+		{
+			scenario: "key does exist, but value has no unit and is invalid",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"foo",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       0.0,
+			expectError:  true,
+		},
+		{
+			scenario: "key does exist with a pt value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"72pt",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       1.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist with a px value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"96px",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       1.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist with an in value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"1in",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       1.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist with a mm value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"25.4mm",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       1.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist with a cm value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"2.54cm",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       1.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist with a pc value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"6pc",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       1.0,
+			expectError:  false,
+		},
+		{
+			scenario: "key does exist with no unit in the value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"100",
+					},
+				},
+			},
+			defaultValue: 0.0,
+			expect:       100,
+			expectError:  false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			var actual float64
+
+			tc.form.Inches("foo", &actual, tc.defaultValue)
+
+			if fmt.Sprintf("%.1f", actual) != fmt.Sprintf("%.1f", tc.expect) {
+				t.Errorf("expected %.1f but got %.1f", tc.expect, actual)
+			}
+
+			if tc.expectError && tc.form.errors == nil {
+				t.Fatal("expected error but got none", tc.form.errors)
+			}
+
+			if !tc.expectError && tc.form.errors != nil {
+				t.Fatalf("expected no error but got: %v", tc.form.errors)
+			}
+		})
+	}
+}
+
+func TestFormData_MandatoryInches(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		form        *FormData
+		expect      float64
+		expectError bool
+	}{
+		{
+			scenario:    "missing mandatory key",
+			form:        &FormData{},
+			expect:      0.0,
+			expectError: true,
+		},
+		{
+			scenario: "mandatory value is empty",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"",
+					},
+				},
+			},
+			expect:      0.0,
+			expectError: true,
+		},
+		{
+			scenario: "mandatory value has a unit, but the rest is not float64 compatible",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"foomm",
+					},
+				},
+			},
+			expect:      0.0,
+			expectError: true,
+		},
+		{
+			scenario: "mandatory value has no unit and is invalid",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"foo",
+					},
+				},
+			},
+			expect:      0.0,
+			expectError: true,
+		},
+		{
+			scenario: "a pt mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"72pt",
+					},
+				},
+			},
+			expect:      1.0,
+			expectError: false,
+		},
+		{
+			scenario: "a px mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"96px",
+					},
+				},
+			},
+			expect:      1.0,
+			expectError: false,
+		},
+		{
+			scenario: "an in mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"1in",
+					},
+				},
+			},
+			expect:      1.0,
+			expectError: false,
+		},
+		{
+			scenario: "a mm mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"25.4mm",
+					},
+				},
+			},
+			expect:      1.0,
+			expectError: false,
+		},
+		{
+			scenario: "a cm mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"2.54cm",
+					},
+				},
+			},
+			expect:      1.0,
+			expectError: false,
+		},
+		{
+			scenario: "a pc mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"6pc",
+					},
+				},
+			},
+			expect:      1.0,
+			expectError: false,
+		},
+		{
+			scenario: "no unit in the mandatory value",
+			form: &FormData{
+				values: map[string][]string{
+					"foo": {
+						"100",
+					},
+				},
+			},
+			expect:      100,
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			var actual float64
+
+			tc.form.MandatoryInches("foo", &actual)
+
+			if fmt.Sprintf("%.1f", actual) != fmt.Sprintf("%.1f", tc.expect) {
+				t.Errorf("expected %.1f but got %.1f", tc.expect, actual)
+			}
+
+			if tc.expectError && tc.form.errors == nil {
+				t.Fatal("expected error but got none", tc.form.errors)
+			}
+
+			if !tc.expectError && tc.form.errors != nil {
+				t.Fatalf("expected no error but got: %v", tc.form.errors)
+			}
+		})
+	}
+}
+
 func TestFormData_Custom(t *testing.T) {
 	for _, tc := range []struct {
 		scenario     string

pkg/modules/api/middlewares.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"context"
+	"crypto/subtle"
 	"errors"
 	"fmt"
 	"net/http"
@@ -10,14 +11,21 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
-// ErrAsyncProcess happens when a handler or middleware handles a request in an
-// asynchronous fashion.
-var ErrAsyncProcess = errors.New("async process")
+var (
+	// ErrAsyncProcess happens when a handler or middleware handles a request
+	// in an asynchronous fashion.
+	ErrAsyncProcess = errors.New("async process")
+
+	// ErrNoOutputFile happens when a handler or middleware handles a request
+	// without sending any output file.
+	ErrNoOutputFile = errors.New("no output file")
+)
 
 // ParseError parses an error and returns the corresponding HTTP status and
 // HTTP message.
@@ -32,6 +40,26 @@ func ParseError(err error) (int, string) {
 		return http.StatusServiceUnavailable, http.StatusText(http.StatusServiceUnavailable)
 	}
 
+	if errors.Is(err, gotenberg.ErrFiltered) {
+		return http.StatusForbidden, http.StatusText(http.StatusForbidden)
+	}
+
+	if errors.Is(err, gotenberg.ErrMaximumQueueSizeExceeded) {
+		return http.StatusTooManyRequests, http.StatusText(http.StatusTooManyRequests)
+	}
+
+	if errors.Is(err, gotenberg.ErrPdfSplitModeNotSupported) {
+		return http.StatusBadRequest, "At least one PDF engine cannot process the requested PDF split mode, while others may have failed to split due to different issues"
+	}
+
+	if errors.Is(err, gotenberg.ErrPdfFormatNotSupported) {
+		return http.StatusBadRequest, "At least one PDF engine cannot process the requested PDF format, while others may have failed to convert due to different issues"
+	}
+
+	if errors.Is(err, gotenberg.ErrPdfEngineMetadataValueNotSupported) {
+		return http.StatusBadRequest, "At least one PDF engine cannot process the requested metadata, while others may have failed to convert due to different issues"
+	}
+
 	var httpErr HttpError
 	if errors.As(err, &httpErr) {
 		return httpErr.HttpError()
@@ -90,7 +118,6 @@ func rootPathMiddleware(rootPath string) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			c.Set("rootPath", rootPath)
-
 			// Call the next middleware in the chain.
 			return next(c)
 		}
@@ -134,9 +161,12 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 			trace := c.Get("trace").(string)
 			rootPath := c.Get("rootPath").(string)
 
-			// Create the request logger and add it to our locals.
-			reqLogger := logger.With(zap.String("trace", trace))
-			c.Set("logger", reqLogger.Named(func() string {
+			// Create the application logger and add it to our locals.
+			appLogger := logger.
+				With(zap.String("log_type", "application")).
+				With(zap.String("trace", trace))
+
+			c.Set("logger", appLogger.Named(func() string {
 				return strings.ReplaceAll(
 					strings.ReplaceAll(c.Request().URL.Path, rootPath, ""),
 					"/",
@@ -150,6 +180,11 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 				c.Error(err)
 			}
 
+			// Create the access logger.
+			accessLogger := logger.
+				With(zap.String("log_type", "access")).
+				With(zap.String("trace", trace))
+
 			for _, path := range disableLoggingForPaths {
 				URI := fmt.Sprintf("%s%s", rootPath, path)
 
@@ -185,9 +220,9 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 			fields[11] = zap.Int64("bytes_out", c.Response().Size)
 
 			if err != nil {
-				reqLogger.Error(err.Error(), fields...)
+				accessLogger.Error(err.Error(), fields...)
 			} else {
-				reqLogger.Info("request handled", fields...)
+				accessLogger.Info("request handled", fields...)
 			}
 
 			return nil
@@ -195,6 +230,17 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 	}
 }
 
+// basicAuthMiddleware manages basic authentication.
+func basicAuthMiddleware(username, password string) echo.MiddlewareFunc {
+	return middleware.BasicAuth(func(u string, p string, e echo.Context) (bool, error) {
+		if subtle.ConstantTimeCompare([]byte(u), []byte(username)) == 1 &&
+			subtle.ConstantTimeCompare([]byte(p), []byte(password)) == 1 {
+			return true, nil
+		}
+		return false, nil
+	})
+}
+
 // contextMiddleware, a middleware for "multipart/form-data" requests, sets the
 // [Context] and related context.CancelFunc in the [echo.Context] under
 // "context" and "cancel". If the process is synchronous, it also handles the
@@ -202,14 +248,16 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 //
 //	ctx := c.Get("context").(*api.Context)
 //	cancel := c.Get("cancel").(context.CancelFunc)
-func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration) echo.MiddlewareFunc {
+func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration, bodyLimit int64, downloadFromCfg downloadFromConfig) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			logger := c.Get("logger").(*zap.Logger)
+			traceHeader := c.Get("traceHeader").(string)
+			trace := c.Get("trace").(string)
 
 			// We create a context with a timeout so that underlying processes are
 			// able to stop early and handle correctly a timeout scenario.
-			ctx, cancel, err := newContext(c, logger, fs, timeout)
+			ctx, cancel, err := newContext(c, logger, fs, timeout, bodyLimit, downloadFromCfg, traceHeader, trace)
 			if err != nil {
 				cancel()
 
@@ -230,6 +278,13 @@ func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration) echo.Mid
 
 			defer cancel()
 
+			if errors.Is(err, ErrNoOutputFile) {
+				// A middleware/handler tells us that it's handling the process
+				// in an asynchronous fashion. Therefore, we must not cancel
+				// the context nor send an output file.
+				return nil
+			}
+
 			if err != nil {
 				return err
 			}

pkg/modules/api/middlewares_test.go

@@ -14,7 +14,7 @@ import (
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestParseError(t *testing.T) {
@@ -29,9 +29,29 @@ func TestParseError(t *testing.T) {
 			expectMessage: http.StatusText(http.StatusInternalServerError),
 		},
 		{
-			err:           context.DeadlineExceeded,
-			expectStatus:  http.StatusServiceUnavailable,
-			expectMessage: http.StatusText(http.StatusServiceUnavailable),
+			err:           gotenberg.ErrFiltered,
+			expectStatus:  http.StatusForbidden,
+			expectMessage: http.StatusText(http.StatusForbidden),
+		},
+		{
+			err:           gotenberg.ErrMaximumQueueSizeExceeded,
+			expectStatus:  http.StatusTooManyRequests,
+			expectMessage: http.StatusText(http.StatusTooManyRequests),
+		},
+		{
+			err:           gotenberg.ErrPdfSplitModeNotSupported,
+			expectStatus:  http.StatusBadRequest,
+			expectMessage: "At least one PDF engine cannot process the requested PDF split mode, while others may have failed to split due to different issues",
+		},
+		{
+			err:           gotenberg.ErrPdfFormatNotSupported,
+			expectStatus:  http.StatusBadRequest,
+			expectMessage: "At least one PDF engine cannot process the requested PDF format, while others may have failed to convert due to different issues",
+		},
+		{
+			err:           gotenberg.ErrPdfEngineMetadataValueNotSupported,
+			expectStatus:  http.StatusBadRequest,
+			expectMessage: "At least one PDF engine cannot process the requested metadata, while others may have failed to convert due to different issues",
 		},
 		{
 			err: WrapError(
@@ -221,6 +241,56 @@ func TestTraceMiddleware(t *testing.T) {
 	}
 }
 
+func TestBasicAuthMiddleware(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		request     *http.Request
+		username    string
+		password    string
+		expectError bool
+	}{
+		{
+			scenario: "invalid basic auth",
+			request: func() *http.Request {
+				req := httptest.NewRequest(http.MethodGet, "/", nil)
+				req.SetBasicAuth("invalid", "invalid")
+				return req
+			}(),
+			username:    "foo",
+			password:    "bar",
+			expectError: true,
+		},
+		{
+			scenario: "valid basic auth",
+			request: func() *http.Request {
+				req := httptest.NewRequest(http.MethodGet, "/", nil)
+				req.SetBasicAuth("foo", "bar")
+				return req
+			}(),
+			username:    "foo",
+			password:    "bar",
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			recorder := httptest.NewRecorder()
+			srv := echo.New()
+			srv.HideBanner = true
+			srv.HidePort = true
+			c := srv.NewContext(tc.request, recorder)
+			err := basicAuthMiddleware(tc.username, tc.password)(func(c echo.Context) error {
+				return nil
+			})(c)
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
 func TestLoggerMiddleware(t *testing.T) {
 	for i, tc := range []struct {
 		request     *http.Request
@@ -320,6 +390,15 @@ func TestContextMiddleware(t *testing.T) {
 			}(),
 			expectStatus: http.StatusNoContent,
 		},
+		{
+			request: buildMultipartFormDataRequest(),
+			next: func() echo.HandlerFunc {
+				return func(c echo.Context) error {
+					return ErrNoOutputFile
+				}
+			}(),
+			expectStatus: http.StatusOK,
+		},
 		{
 			request: buildMultipartFormDataRequest(),
 			next: func() echo.HandlerFunc {
@@ -384,10 +463,11 @@ func TestContextMiddleware(t *testing.T) {
 
 		c := srv.NewContext(tc.request, recorder)
 		c.Set("logger", zap.NewNop())
+		c.Set("traceHeader", "Gotenberg-Trace")
 		c.Set("trace", "foo")
 		c.Set("startTime", time.Now())
 
-		err := contextMiddleware(gotenberg.NewFileSystem(), time.Duration(10)*time.Second)(tc.next)(c)
+		err := contextMiddleware(gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll)), time.Duration(10)*time.Second, 0, downloadFromConfig{})(tc.next)(c)
 
 		if tc.expectErr && err == nil {
 			t.Errorf("test %d: expected error but got: %v", i, err)

pkg/modules/api/mocks.go

@@ -4,6 +4,8 @@ import (
 	"github.com/alexliesenfeld/health"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 // ContextMock is a helper for tests.
@@ -76,7 +78,7 @@ func (ctx *ContextMock) SetLogger(logger *zap.Logger) {
 	ctx.logger = logger
 }
 
-// SetEchoContext sets the echo.Context.
+// SetEchoContext sets the [echo.Context].
 //
 //	ctx := &api.ContextMock{Context: &api.Context{}}
 //	ctx.setEchoContext(c)
@@ -84,6 +86,22 @@ func (ctx *ContextMock) SetEchoContext(c echo.Context) {
 	ctx.Context.echoCtx = c
 }
 
+// SetMkdirAll sets the [gotenberg.MkdirAll].
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetMkdirAll(mkdirAll)
+func (ctx *ContextMock) SetMkdirAll(mkdirAll gotenberg.MkdirAll) {
+	ctx.Context.mkdirAll = mkdirAll
+}
+
+// SetPathRename sets the [gotenberg.PathRename].
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.setPathRename(rename)
+func (ctx *ContextMock) SetPathRename(rename gotenberg.PathRename) {
+	ctx.Context.pathRename = rename
+}
+
 // RouterMock is a mock for the [Router] interface.
 type RouterMock struct {
 	RoutesMock func() ([]Route, error)
@@ -105,12 +123,17 @@ func (provider *MiddlewareProviderMock) Middlewares() ([]Middleware, error) {
 // HealthCheckerMock is mock for the [HealthChecker] interface.
 type HealthCheckerMock struct {
 	ChecksMock func() ([]health.CheckerOption, error)
+	ReadyMock  func() error
 }
 
 func (mod *HealthCheckerMock) Checks() ([]health.CheckerOption, error) {
 	return mod.ChecksMock()
 }
 
+func (mod *HealthCheckerMock) Ready() error {
+	return mod.ReadyMock()
+}
+
 // Interface guards.
 var (
 	_ Router             = (*RouterMock)(nil)

pkg/modules/api/mocks_test.go

@@ -7,6 +7,8 @@ import (
 	"github.com/alexliesenfeld/health"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestContextMock_SetDirPath(t *testing.T) {
@@ -117,6 +119,32 @@ func TestContextMock_SetEchoContext(t *testing.T) {
 	}
 }
 
+func TestContextMock_SetMkdirAll(t *testing.T) {
+	mock := ContextMock{&Context{}}
+
+	expect := new(gotenberg.OsMkdirAll)
+	mock.SetMkdirAll(expect)
+
+	actual := mock.mkdirAll
+
+	if actual != expect {
+		t.Errorf("expected %v but got %v", expect, actual)
+	}
+}
+
+func TestContextMock_SetPathRename(t *testing.T) {
+	mock := ContextMock{&Context{}}
+
+	expect := new(gotenberg.OsPathRename)
+	mock.SetPathRename(expect)
+
+	actual := mock.pathRename
+
+	if actual != expect {
+		t.Errorf("expected %v but got %v", expect, actual)
+	}
+}
+
 func TestRouterMock(t *testing.T) {
 	mock := &RouterMock{
 		RoutesMock: func() ([]Route, error) {
@@ -148,10 +176,18 @@ func TestHealthCheckerMock(t *testing.T) {
 		ChecksMock: func() ([]health.CheckerOption, error) {
 			return nil, nil
 		},
+		ReadyMock: func() error {
+			return nil
+		},
 	}
 
 	_, err := mock.Checks()
 	if err != nil {
 		t.Errorf("expected no error from HealthCheckerMock.Checks, but got: %v", err)
 	}
+
+	err = mock.Ready()
+	if err != nil {
+		t.Errorf("expected no error from HealthCheckerMock.Ready, but got: %v", err)
+	}
 }

pkg/modules/chromium/browser.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"regexp"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -15,14 +14,17 @@ import (
 	"github.com/chromedp/cdproto/network"
 	"github.com/chromedp/cdproto/runtime"
 	"github.com/chromedp/chromedp"
+	"github.com/dlclark/regexp2"
+	"github.com/shirou/gopsutil/v4/process"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 type browser interface {
 	gotenberg.Process
-	pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error
+	pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error
+	screenshot(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error
 }
 
 type browserArguments struct {
@@ -38,8 +40,10 @@ type browserArguments struct {
 	wsUrlReadTimeout         time.Duration
 
 	// Tasks specific.
-	allowList         *regexp.Regexp
-	denyList          *regexp.Regexp
+	allowList         *regexp2.Regexp
+	denyList          *regexp2.Regexp
+	clearCache        bool
+	clearCookies      bool
 	disableJavaScript bool
 }
 
@@ -59,7 +63,7 @@ func newChromiumBrowser(arguments browserArguments) browser {
 	b := &chromiumBrowser{
 		initialCtx: context.Background(),
 		arguments:  arguments,
-		fs:         gotenberg.NewFileSystem(),
+		fs:         gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll)),
 	}
 	b.isStarted.Store(false)
 
@@ -87,6 +91,8 @@ func (b *chromiumBrowser) Start(logger *zap.Logger) error {
 		// https://github.com/puppeteer/puppeteer/issues/2410
 		chromedp.Flag("font-render-hinting", "none"),
 		chromedp.UserDataDir(b.userProfileDirPath),
+		// See https://github.com/gotenberg/gotenberg/issues/831.
+		chromedp.Flag("disable-pdf-tagging", true),
 	)
 
 	if b.arguments.incognito {
@@ -137,7 +143,7 @@ func (b *chromiumBrowser) Start(logger *zap.Logger) error {
 	b.ctxMu.Lock()
 	defer b.ctxMu.Unlock()
 
-	// We have to keep the context around, as we need it to create a new tabs
+	// We have to keep the context around, as we need it to create new tabs
 	// later.
 	b.ctx = ctx
 	b.cancelFunc = func() {
@@ -157,21 +163,61 @@ func (b *chromiumBrowser) Stop(logger *zap.Logger) error {
 
 	// Always remove the user profile directory created by Chromium.
 	copyUserProfileDirPath := b.userProfileDirPath
-	defer func(userProfileDirPath string) {
+	expirationTime := time.Now()
+	defer func(userProfileDirPath string, expirationTime time.Time) {
+		// See:
+		// https://github.com/SeleniumHQ/docker-selenium/blob/7216d060d86872afe853ccda62db0dfab5118dc7/NodeChrome/chrome-cleanup.sh
+		// https://github.com/SeleniumHQ/docker-selenium/blob/7216d060d86872afe853ccda62db0dfab5118dc7/NodeChromium/chrome-cleanup.sh
+
+		// Clean up stuck processes.
+		ps, err := process.Processes()
+		if err != nil {
+			logger.Error(fmt.Sprintf("list processes: %v", err))
+		} else {
+			for _, p := range ps {
+				func() {
+					cmdline, err := p.Cmdline()
+					if err != nil {
+						return
+					}
+
+					if !strings.Contains(cmdline, "chromium/chromium") && !strings.Contains(cmdline, "chrome/chrome") {
+						return
+					}
+
+					killCtx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+					defer cancel()
+
+					err = p.KillWithContext(killCtx)
+					if err != nil {
+						logger.Error(fmt.Sprintf("kill process: %v", err))
+					} else {
+						logger.Debug(fmt.Sprintf("Chromium process %d killed", p.Pid))
+					}
+				}()
+			}
+		}
+
 		go func() {
 			// FIXME: Chromium seems to recreate the user profile directory
 			//  right after its deletion if we do not wait a certain amount
-			//  of time before re-deleting it.
+			//  of time before deleting it.
 			<-time.After(10 * time.Second)
 
-			err := os.RemoveAll(userProfileDirPath)
+			err = os.RemoveAll(userProfileDirPath)
 			if err != nil {
 				logger.Error(fmt.Sprintf("remove Chromium's user profile directory: %s", err))
+			} else {
+				logger.Debug(fmt.Sprintf("'%s' Chromium's user profile directory removed", userProfileDirPath))
 			}
 
-			logger.Debug(fmt.Sprintf("'%s' Chromium's user profile directory removed", userProfileDirPath))
+			// Also remove Chromium specific files in the temporary directory.
+			err = gotenberg.GarbageCollect(logger, os.TempDir(), []string{".org.chromium.Chromium", ".com.google.Chrome"}, expirationTime)
+			if err != nil {
+				logger.Error(err.Error())
+			}
 		}()
-	}(copyUserProfileDirPath)
+	}(copyUserProfileDirPath, expirationTime)
 
 	b.ctxMu.Lock()
 	defer b.ctxMu.Unlock()
@@ -211,18 +257,56 @@ func (b *chromiumBrowser) Healthy(logger *zap.Logger) bool {
 	return true
 }
 
-func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
+	// Note: no error wrapping because it leaks on errors we want to display to
+	// the end user.
+	return b.do(ctx, logger, url, options.Options, chromedp.Tasks{
+		network.Enable(),
+		fetch.Enable(),
+		runtime.Enable(),
+		clearCacheActionFunc(logger, b.arguments.clearCache),
+		clearCookiesActionFunc(logger, b.arguments.clearCookies),
+		disableJavaScriptActionFunc(logger, b.arguments.disableJavaScript),
+		setCookiesActionFunc(logger, options.Cookies),
+		userAgentOverride(logger, options.UserAgent),
+		navigateActionFunc(logger, url, options.SkipNetworkIdleEvent),
+		hideDefaultWhiteBackgroundActionFunc(logger, options.OmitBackground, options.PrintBackground),
+		forceExactColorsActionFunc(),
+		emulateMediaTypeActionFunc(logger, options.EmulatedMediaType),
+		waitDelayBeforePrintActionFunc(logger, b.arguments.disableJavaScript, options.WaitDelay),
+		waitForExpressionBeforePrintActionFunc(logger, b.arguments.disableJavaScript, options.WaitForExpression),
+		// PDF specific.
+		printToPdfActionFunc(logger, outputPath, options),
+	})
+}
+
+func (b *chromiumBrowser) screenshot(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+	// Note: no error wrapping because it leaks on errors we want to display to
+	// the end user.
+	return b.do(ctx, logger, url, options.Options, chromedp.Tasks{
+		network.Enable(),
+		fetch.Enable(),
+		runtime.Enable(),
+		clearCacheActionFunc(logger, b.arguments.clearCache),
+		clearCookiesActionFunc(logger, b.arguments.clearCookies),
+		disableJavaScriptActionFunc(logger, b.arguments.disableJavaScript),
+		setCookiesActionFunc(logger, options.Cookies),
+		userAgentOverride(logger, options.UserAgent),
+		navigateActionFunc(logger, url, options.SkipNetworkIdleEvent),
+		hideDefaultWhiteBackgroundActionFunc(logger, options.OmitBackground, true),
+		forceExactColorsActionFunc(),
+		emulateMediaTypeActionFunc(logger, options.EmulatedMediaType),
+		waitDelayBeforePrintActionFunc(logger, b.arguments.disableJavaScript, options.WaitDelay),
+		waitForExpressionBeforePrintActionFunc(logger, b.arguments.disableJavaScript, options.WaitForExpression),
+		// Screenshot specific.
+		setDeviceMetricsOverride(logger, options.Width, options.Height),
+		captureScreenshotActionFunc(logger, outputPath, options),
+	})
+}
+
+func (b *chromiumBrowser) do(ctx context.Context, logger *zap.Logger, url string, options Options, tasks chromedp.Tasks) error {
 	if !b.isStarted.Load() {
-		return errors.New("browser not started, cannot handle PDF conversion")
-	}
-
-	// We validate the "main" URL against our allow / deny lists.
-	if !b.arguments.allowList.MatchString(url) {
-		return fmt.Errorf("'%s' does not match the expression from the allowed list: %w", url, ErrUrlNotAuthorized)
-	}
-
-	if b.arguments.denyList.String() != "" && b.arguments.denyList.MatchString(url) {
-		return fmt.Errorf("'%s' matches the expression from the denied list: %w", url, ErrUrlNotAuthorized)
+		return errors.New("browser not started, cannot handle tasks")
 	}
 
 	deadline, ok := ctx.Deadline()
@@ -230,6 +314,12 @@ func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outp
 		return errors.New("context has no deadline")
 	}
 
+	// We validate the "main" URL against our allow / deny lists.
+	err := gotenberg.FilterDeadline(b.arguments.allowList, b.arguments.denyList, url, deadline)
+	if err != nil {
+		return fmt.Errorf("filter URL: %w", err)
+	}
+
 	b.ctxMu.RLock()
 	defer b.ctxMu.RUnlock()
 
@@ -240,8 +330,36 @@ func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outp
 	defer taskCancel()
 
 	// We validate all others requests against our allow / deny lists.
-	// If a request does not pass the validation, we make it fail.
-	listenForEventRequestPaused(taskCtx, logger, b.arguments.allowList, b.arguments.denyList)
+	// If a request does not pass the validation, we make it fail. It also set
+	// the extra HTTP headers, if any.
+	// See https://github.com/gotenberg/gotenberg/issues/1011.
+	listenForEventRequestPaused(taskCtx, logger, eventRequestPausedOptions{
+		allowList:        b.arguments.allowList,
+		denyList:         b.arguments.denyList,
+		extraHttpHeaders: options.ExtraHttpHeaders,
+	})
+
+	var (
+		invalidHttpStatusCode           error
+		invalidHttpStatusCodeMu         sync.RWMutex
+		invalidResourceHttpStatusCode   error
+		invalidResourceHttpStatusCodeMu sync.RWMutex
+	)
+
+	// See:
+	// https://github.com/gotenberg/gotenberg/issues/613.
+	// https://github.com/gotenberg/gotenberg/issues/1021.
+	if len(options.FailOnHttpStatusCodes) != 0 || len(options.FailOnResourceHttpStatusCodes) != 0 {
+		listenForEventResponseReceived(taskCtx, logger, eventResponseReceivedOptions{
+			mainPageUrl:                     url,
+			failOnHttpStatusCodes:           options.FailOnHttpStatusCodes,
+			invalidHttpStatusCode:           &invalidHttpStatusCode,
+			invalidHttpStatusCodeMu:         &invalidHttpStatusCodeMu,
+			failOnResourceOnHttpStatusCode:  options.FailOnResourceHttpStatusCodes,
+			invalidResourceHttpStatusCode:   &invalidResourceHttpStatusCode,
+			invalidResourceHttpStatusCodeMu: &invalidResourceHttpStatusCodeMu,
+		})
+	}
 
 	var (
 		consoleExceptions   error
@@ -253,22 +371,25 @@ func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outp
 		listenForEventExceptionThrown(taskCtx, logger, &consoleExceptions, &consoleExceptionsMu)
 	}
 
-	tasks := chromedp.Tasks{
-		network.Enable(),
-		fetch.Enable(),
-		runtime.Enable(),
-		disableJavaScriptActionFunc(logger, b.arguments.disableJavaScript),
-		extraHttpHeadersActionFunc(logger, options.ExtraHttpHeaders),
-		navigateActionFunc(logger, url),
-		hideDefaultWhiteBackgroundActionFunc(logger, options.OmitBackground, options.PrintBackground),
-		forceExactColorsActionFunc(),
-		emulateMediaTypeActionFunc(logger, options.EmulatedMediaType),
-		waitDelayBeforePrintActionFunc(logger, b.arguments.disableJavaScript, options.WaitDelay),
-		waitForExpressionBeforePrintActionFunc(logger, b.arguments.disableJavaScript, options.WaitForExpression),
-		printToPdfActionFunc(logger, outputPath, options),
-	}
+	var (
+		loadingFailed           error
+		loadingFailedMu         sync.RWMutex
+		resourceLoadingFailed   error
+		resourceLoadingFailedMu sync.RWMutex
+	)
 
-	err := chromedp.Run(taskCtx, tasks...)
+	// See:
+	// https://github.com/gotenberg/gotenberg/issues/913.
+	// https://github.com/gotenberg/gotenberg/issues/959.
+	// https://github.com/gotenberg/gotenberg/issues/1021.
+	listenForEventLoadingFailed(taskCtx, logger, eventLoadingFailedOptions{
+		loadingFailed:           &loadingFailed,
+		loadingFailedMu:         &loadingFailedMu,
+		resourceLoadingFailed:   &resourceLoadingFailed,
+		resourceLoadingFailedMu: &resourceLoadingFailedMu,
+	})
+
+	err = chromedp.Run(taskCtx, tasks...)
 	if err != nil {
 		errMessage := err.Error()
 
@@ -284,7 +405,23 @@ func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outp
 			return ErrRpccMessageTooLarge
 		}
 
-		return fmt.Errorf("print to PDF: %w", err)
+		return fmt.Errorf("handle tasks: %w", err)
+	}
+
+	// See https://github.com/gotenberg/gotenberg/issues/613.
+	invalidHttpStatusCodeMu.RLock()
+	defer invalidHttpStatusCodeMu.RUnlock()
+
+	if invalidHttpStatusCode != nil {
+		return fmt.Errorf("%v: %w", invalidHttpStatusCode, ErrInvalidHttpStatusCode)
+	}
+
+	// See https://github.com/gotenberg/gotenberg/issues/1021.
+	invalidResourceHttpStatusCodeMu.RLock()
+	defer invalidResourceHttpStatusCodeMu.RUnlock()
+
+	if invalidResourceHttpStatusCode != nil {
+		return fmt.Errorf("%v: %w", invalidResourceHttpStatusCode, ErrInvalidResourceHttpStatusCode)
 	}
 
 	// See https://github.com/gotenberg/gotenberg/issues/262.
@@ -295,6 +432,23 @@ func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outp
 		return fmt.Errorf("%v: %w", consoleExceptions, ErrConsoleExceptions)
 	}
 
+	// See:
+	// https://github.com/gotenberg/gotenberg/issues/913.
+	// https://github.com/gotenberg/gotenberg/issues/959.
+	loadingFailedMu.RLock()
+	defer loadingFailedMu.RUnlock()
+
+	if loadingFailed != nil {
+		return fmt.Errorf("%v: %w", loadingFailed, ErrLoadingFailed)
+	}
+
+	// See https://github.com/gotenberg/gotenberg/issues/1021.
+	if options.FailOnResourceLoadingFailed {
+		if resourceLoadingFailed != nil {
+			return fmt.Errorf("%v: %w", resourceLoadingFailed, ErrResourceLoadingFailed)
+		}
+	}
+
 	return nil
 }
 

pkg/modules/chromium/chromium.go

@@ -8,12 +8,13 @@ import (
 	"time"
 
 	"github.com/alexliesenfeld/health"
+	"github.com/chromedp/cdproto/network"
+	"github.com/dlclark/regexp2"
 	flag "github.com/spf13/pflag"
-	"go.uber.org/multierr"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
 )
 
 func init() {
@@ -21,14 +22,6 @@ func init() {
 }
 
 var (
-	// ErrUrlNotAuthorized happens if a URL is not acceptable according to the
-	// allowed/denied lists.
-	ErrUrlNotAuthorized = errors.New("URL not authorized")
-
-	// ErrOmitBackgroundWithoutPrintBackground happens if
-	// Options.OmitBackground is set to true but not Options.PrintBackground.
-	ErrOmitBackgroundWithoutPrintBackground = errors.New("omit background without print background")
-
 	// ErrInvalidEmulatedMediaType happens if the emulated media type is not
 	// "screen" nor "print". Empty value are allowed though.
 	ErrInvalidEmulatedMediaType = errors.New("invalid emulated media type")
@@ -37,22 +30,43 @@ var (
 	// returns an exception or undefined.
 	ErrInvalidEvaluationExpression = errors.New("invalid evaluation expression")
 
-	// ErrInvalidPrinterSettings happens if the Options have one or more
-	// aberrant values.
-	ErrInvalidPrinterSettings = errors.New("invalid printer settings")
-
-	// ErrPageRangesSyntaxError happens if the Options have an invalid page
-	// ranges.
-	ErrPageRangesSyntaxError = errors.New("page ranges syntax error")
-
 	// ErrRpccMessageTooLarge happens when the messages received by
 	// ChromeDevTools are larger than 100 MB.
 	ErrRpccMessageTooLarge = errors.New("rpcc message too large")
 
+	// ErrInvalidHttpStatusCode happens when the status code from the main page
+	// matches with one of the entry in [Options.FailOnHttpStatusCodes].
+	ErrInvalidHttpStatusCode = errors.New("invalid HTTP status code")
+
+	// ErrInvalidResourceHttpStatusCode happens when the status code from one
+	// or more resources matches with one of the entry in
+	// [Options.FailOnResourceHttpStatusCodes].
+	ErrInvalidResourceHttpStatusCode = errors.New("invalid resource HTTP status code")
+
 	// ErrConsoleExceptions happens when there are exceptions in the Chromium
 	// console. It also happens only if the [Options.FailOnConsoleExceptions]
 	// is set to true.
 	ErrConsoleExceptions = errors.New("console exceptions")
+
+	// ErrLoadingFailed happens when the main page failed to load.
+	ErrLoadingFailed = errors.New("loading failed")
+
+	// ErrResourceLoadingFailed happens when one or more resources failed to load.
+	ErrResourceLoadingFailed = errors.New("resource loading failed")
+
+	// PDF specific.
+
+	// ErrOmitBackgroundWithoutPrintBackground happens if
+	// PdfOptions.OmitBackground is set to true but not PdfOptions.PrintBackground.
+	ErrOmitBackgroundWithoutPrintBackground = errors.New("omit background without print background")
+
+	// ErrInvalidPrinterSettings happens if the PdfOptions have one or more
+	// aberrant values.
+	ErrInvalidPrinterSettings = errors.New("invalid printer settings")
+
+	// ErrPageRangesSyntaxError happens if the PdfOptions have an invalid page
+	// ranges.
+	ErrPageRangesSyntaxError = errors.New("page ranges syntax error")
 )
 
 // Chromium is a module which provides both an [Api] and routes for converting
@@ -68,81 +82,116 @@ type Chromium struct {
 	engine     gotenberg.PdfEngine
 }
 
-// Options are the available expectedOptions for converting HTML document to PDF.
+// Options are the common options for all conversions.
 type Options struct {
+	// SkipNetworkIdleEvent set if the conversion should wait for the
+	// "networkIdle" event, drastically improving the conversion speed. It may
+	// not be suitable for all HTML documents, as some may not be fully
+	// rendered until this event is fired.
+	SkipNetworkIdleEvent bool
+
+	// FailOnHttpStatusCodes sets if the conversion should fail if the status
+	// code from the main page matches with one of its entries.
+	FailOnHttpStatusCodes []int64
+
+	// FailOnResourceHttpStatusCodes sets if the conversion should fail if the
+	// status code from at least one resource matches with one if its entries.
+	FailOnResourceHttpStatusCodes []int64
+
+	// FailOnResourceLoadingFailed sets if the conversion should fail like the
+	// main page if Chromium fails to load at least one resource.
+	FailOnResourceLoadingFailed bool
+
 	// FailOnConsoleExceptions sets if the conversion should fail if there are
 	// exceptions in the Chromium console.
-	// Optional.
 	FailOnConsoleExceptions bool
 
 	// WaitDelay is the duration to wait when loading an HTML document before
-	// converting it to PDF.
-	// Optional.
+	// converting it.
 	WaitDelay time.Duration
 
 	// WaitWindowStatus is the window.status value to wait for before
-	// converting an HTML document to PDF.
-	// Optional.
+	// converting an HTML document.
 	WaitWindowStatus string
 
 	// WaitForExpression is the custom JavaScript expression to wait before
-	// converting an HTML document to PDF until it returns true
-	// Optional.
+	// converting an HTML document until it returns true
 	WaitForExpression string
 
-	// ExtraHttpHeaders are the HTTP headers to send by Chromium while loading
-	// the HTML document.
-	// Optional.
-	ExtraHttpHeaders map[string]string
+	// Cookies are the cookies to put in the Chromium cookies' jar.
+	Cookies []Cookie
+
+	// UserAgent overrides the default 'User-Agent' HTTP header.
+	UserAgent string
+
+	// ExtraHttpHeaders are extra HTTP headers to send by Chromium while
+	// loading he HTML document.
+	ExtraHttpHeaders []ExtraHttpHeader
 
 	// EmulatedMediaType is the media type to emulate, either "screen" or
 	// "print".
-	// Optional.
 	EmulatedMediaType string
 
-	// Landscape sets the paper orientation.
-	// Optional.
-	Landscape bool
-
-	// PrintBackground prints the background graphics.
-	// Optional.
-	PrintBackground bool
-
 	// OmitBackground hides default white background and allows generating PDFs
 	// with transparency.
-	// Optional.
 	OmitBackground bool
+}
+
+// DefaultOptions returns the default values for Options.
+func DefaultOptions() Options {
+	return Options{
+		SkipNetworkIdleEvent:          true,
+		FailOnHttpStatusCodes:         []int64{499, 599},
+		FailOnResourceHttpStatusCodes: nil,
+		FailOnResourceLoadingFailed:   false,
+		FailOnConsoleExceptions:       false,
+		WaitDelay:                     0,
+		WaitWindowStatus:              "",
+		WaitForExpression:             "",
+		Cookies:                       nil,
+		UserAgent:                     "",
+		ExtraHttpHeaders:              nil,
+		EmulatedMediaType:             "",
+		OmitBackground:                false,
+	}
+}
+
+// PdfOptions are the available options for converting an HTML document to PDF.
+type PdfOptions struct {
+	Options
+
+	// Landscape sets the paper orientation.
+	Landscape bool
+
+	// PrintBackground prints the background graphics.
+	PrintBackground bool
 
 	// Scale is the scale of the page rendering.
-	// Optional.
 	Scale float64
 
+	// SinglePage defines whether to print the entire content in one single
+	// page.
+	SinglePage bool
+
 	// PaperWidth is the paper width, in inches.
-	// Optional.
 	PaperWidth float64
 
 	// PaperHeight is the paper height, in inches.
-	// Optional.
 	PaperHeight float64
 
 	// MarginTop is the top margin, in inches.
-	// Optional.
 	MarginTop float64
 
 	// MarginBottom is the bottom margin, in inches.
-	// Optional.
 	MarginBottom float64
 
 	// MarginLeft is the left margin, in inches.
-	// Optional.
 	MarginLeft float64
 
 	// MarginRight is the right margin, in inches.
-	// Optional.
 	MarginRight float64
 
 	// Page ranges to print, e.g., '1-5, 8, 11-13'. Empty means all pages.
-	// Optional.
 	PageRanges string
 
 	// HeaderTemplate is the HTML template of the header. It should be valid
@@ -155,33 +204,29 @@ type Options struct {
 	// - totalPages: total pages in the document
 	// For example, <span class=title></span> would generate span containing
 	// the title.
-	// Optional.
 	HeaderTemplate string
 
 	// FooterTemplate is the HTML template of the footer. It should use the
 	// same format as the HeaderTemplate.
-	// Optional.
 	FooterTemplate string
 
 	// PreferCssPageSize defines whether to prefer page size as defined by CSS.
 	// If false, the content will be scaled to fit the paper size.
-	// Optional.
 	PreferCssPageSize bool
+
+	// GenerateDocumentOutline defines whether the document outline should be
+	// embedded into the PDF.
+	GenerateDocumentOutline bool
 }
 
-// DefaultOptions returns the default values for Options.
-func DefaultOptions() Options {
-	return Options{
-		FailOnConsoleExceptions: false,
-		WaitDelay:               0,
-		WaitWindowStatus:        "",
-		WaitForExpression:       "",
-		ExtraHttpHeaders:        nil,
-		EmulatedMediaType:       "",
+// DefaultPdfOptions returns the default values for PdfOptions.
+func DefaultPdfOptions() PdfOptions {
+	return PdfOptions{
+		Options:                 DefaultOptions(),
 		Landscape:               false,
 		PrintBackground:         false,
-		OmitBackground:          false,
 		Scale:                   1.0,
+		SinglePage:              false,
 		PaperWidth:              8.5,
 		PaperHeight:             11,
 		MarginTop:               0.39,
@@ -192,12 +237,102 @@ func DefaultOptions() Options {
 		HeaderTemplate:          "<html><head></head><body></body></html>",
 		FooterTemplate:          "<html><head></head><body></body></html>",
 		PreferCssPageSize:       false,
+		GenerateDocumentOutline: false,
 	}
 }
 
+// ScreenshotOptions are the available options for capturing a screenshot from
+// an HTML document.
+type ScreenshotOptions struct {
+	Options
+
+	// Width is the device screen width in pixels.
+	Width int
+
+	// Height is the device screen height in pixels.
+	Height int
+
+	// Clip defines whether to clip the screenshot according to the device
+	// dimensions.
+	Clip bool
+
+	// Format is the image compression format, either "png" or "jpeg" or
+	// "webp".
+	Format string
+
+	// Quality is the compression quality from range [0..100] (jpeg only).
+	Quality int
+
+	// OptimizeForSpeed defines whether to optimize image encoding for speed,
+	// not for resulting size.
+	OptimizeForSpeed bool
+}
+
+// DefaultScreenshotOptions returns the default values for ScreenshotOptions.
+func DefaultScreenshotOptions() ScreenshotOptions {
+	return ScreenshotOptions{
+		Options:          DefaultOptions(),
+		Width:            800,
+		Height:           600,
+		Clip:             false,
+		Format:           "png",
+		Quality:          100,
+		OptimizeForSpeed: false,
+	}
+}
+
+// Cookie gathers the available entries for setting a cookie in the Chromium
+// cookies' jar.
+type Cookie struct {
+	// Name is the cookie name.
+	// Required.
+	Name string `json:"name"`
+
+	// Value is the cookie value.
+	// Required.
+	Value string `json:"value"`
+
+	// Domain is the cookie domain.
+	// Required.
+	Domain string `json:"domain"`
+
+	// Path is the cookie path.
+	// Optional.
+	Path string `json:"path,omitempty"`
+
+	// Secure sets the cookie secure if true.
+	// Optional.
+	Secure bool `json:"secure,omitempty"`
+
+	// HttpOnly sets the cookie as HTTP-only if true.
+	// Optional.
+	HttpOnly bool `json:"httpOnly,omitempty"`
+
+	// SameSite is cookie 'Same-Site' status.
+	// Optional.
+	SameSite network.CookieSameSite `json:"sameSite,omitempty"`
+}
+
+// ExtraHttpHeader are extra HTTP headers to send by Chromium.
+type ExtraHttpHeader struct {
+	// Name is the header name.
+	// Required.
+	Name string
+
+	// Value is the header value.
+	// Required.
+	Value string
+
+	// Scope is the header scope. If nil, the header will be applied to ALL
+	// requests from the page.
+	// Optional.
+	Scope *regexp2.Regexp
+}
+
 // Api helps to interact with Chromium for converting HTML documents to PDF.
 type Api interface {
-	Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error
+	Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error
+	Screenshot(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error
 }
 
 // Provider is a module interface which exposes a method for creating an [Api]
@@ -217,21 +352,10 @@ func (mod *Chromium) Descriptor() gotenberg.ModuleDescriptor {
 		ID: "chromium",
 		FlagSet: func() *flag.FlagSet {
 			fs := flag.NewFlagSet("chromium", flag.ExitOnError)
-			// Deprecated flags.
-			fs.String("chromium-user-agent", "", "Override the default User-Agent header")
-			fs.Int("chromium-failed-starts-threshold", 5, "Set the number of consecutive failed starts after which the module is considered unhealthy - 0 means ignore")
-
-			var err error
-			err = multierr.Append(err, fs.MarkDeprecated("chromium-user-agent", "use the extraHttpHeaders form field instead"))
-			err = multierr.Append(err, fs.MarkDeprecated("chromium-failed-starts-threshold", "use the chromium-restart-after property instead"))
-
-			if err != nil {
-				panic(fmt.Errorf("create deprecated flags for the Chromium module: %v", err))
-			}
-
-			fs.Int64("chromium-restart-after", 0, "Number of conversions after which Chromium will automatically restart. Set to 0 to disable this feature")
+			fs.Int64("chromium-restart-after", 10, "Number of conversions after which Chromium will automatically restart. Set to 0 to disable this feature")
+			fs.Int64("chromium-max-queue-size", 0, "Maximum request queue size for Chromium. Set to 0 to disable this feature")
 			fs.Bool("chromium-auto-start", false, "Automatically launch Chromium upon initialization if set to true; otherwise, Chromium will start at the time of the first conversion")
-			fs.Duration("chromium-start-timeout", time.Duration(10)*time.Second, "Maximum duration to wait for Chromium to start or restart")
+			fs.Duration("chromium-start-timeout", time.Duration(20)*time.Second, "Maximum duration to wait for Chromium to start or restart")
 			fs.Bool("chromium-incognito", false, "Start Chromium with incognito mode")
 			fs.Bool("chromium-allow-insecure-localhost", false, "Ignore TLS/SSL errors on localhost")
 			fs.Bool("chromium-ignore-certificate-errors", false, "Ignore the certificate errors")
@@ -240,7 +364,9 @@ func (mod *Chromium) Descriptor() gotenberg.ModuleDescriptor {
 			fs.String("chromium-host-resolver-rules", "", "Set custom mappings to the host resolver")
 			fs.String("chromium-proxy-server", "", "Set the outbound proxy server; this switch only affects HTTP and HTTPS requests")
 			fs.String("chromium-allow-list", "", "Set the allowed URLs for Chromium using a regular expression")
-			fs.String("chromium-deny-list", "^file:///[^tmp].*", "Set the denied URLs for Chromium using a regular expression")
+			fs.String("chromium-deny-list", `^file:(?!//\/tmp/).*`, "Set the denied URLs for Chromium using a regular expression")
+			fs.Bool("chromium-clear-cache", false, "Clear Chromium cache between each conversion")
+			fs.Bool("chromium-clear-cookies", false, "Clear Chromium cookies between each conversion")
 			fs.Bool("chromium-disable-javascript", false, "Disable JavaScript")
 			fs.Bool("chromium-disable-routes", false, "Disable the routes")
 
@@ -274,6 +400,8 @@ func (mod *Chromium) Provision(ctx *gotenberg.Context) error {
 
 		allowList:         flags.MustRegexp("chromium-allow-list"),
 		denyList:          flags.MustRegexp("chromium-deny-list"),
+		clearCache:        flags.MustBool("chromium-clear-cache"),
+		clearCookies:      flags.MustBool("chromium-clear-cookies"),
 		disableJavaScript: flags.MustBool("chromium-disable-javascript"),
 	}
 
@@ -290,7 +418,7 @@ func (mod *Chromium) Provision(ctx *gotenberg.Context) error {
 
 	// Process.
 	mod.browser = newChromiumBrowser(mod.args)
-	mod.supervisor = gotenberg.NewProcessSupervisor(mod.logger, mod.browser, flags.MustInt64("chromium-restart-after"))
+	mod.supervisor = gotenberg.NewProcessSupervisor(mod.logger, mod.browser, flags.MustInt64("chromium-restart-after"), flags.MustInt64("chromium-max-queue-size"))
 
 	// PDF Engine.
 	provider, err := ctx.Module(new(gotenberg.PdfEngineProvider))
@@ -359,22 +487,6 @@ func (mod *Chromium) Stop(ctx context.Context) error {
 // Metrics returns the metrics.
 func (mod *Chromium) Metrics() ([]gotenberg.Metric, error) {
 	return []gotenberg.Metric{
-		{
-			// TODO: remove deprecated.
-			Name:        "chromium_active_instances_count",
-			Description: "Current number of active Chromium instances - deprecated.",
-			Read: func() float64 {
-				return 1
-			},
-		},
-		{
-			// TODO: remove deprecated.
-			Name:        "chromium_failed_starts_count",
-			Description: "Current number of Chromium consecutive starting failures - deprecated.",
-			Read: func() float64 {
-				return 0
-			},
-		},
 		{
 			Name:        "chromium_requests_queue_size",
 			Description: "Current number of Chromium conversion requests waiting to be treated.",
@@ -408,6 +520,34 @@ func (mod *Chromium) Checks() ([]health.CheckerOption, error) {
 	}, nil
 }
 
+// Ready returns no error if the module is ready.
+func (mod *Chromium) Ready() error {
+	if !mod.autoStart {
+		return nil
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), mod.args.wsUrlReadTimeout)
+	defer cancel()
+
+	ticker := time.NewTicker(time.Duration(100) * time.Millisecond)
+
+	for {
+		select {
+		case <-ctx.Done():
+			ticker.Stop()
+			return fmt.Errorf("context done while waiting for Chromium to be ready: %w", ctx.Err())
+		case <-ticker.C:
+			ok := mod.browser.Healthy(mod.logger)
+			if ok {
+				ticker.Stop()
+				return nil
+			}
+
+			continue
+		}
+	}
+}
+
 // Chromium returns an [Api] for interacting with Chromium for converting HTML
 // documents to PDF.
 func (mod *Chromium) Chromium() (Api, error) {
@@ -422,19 +562,31 @@ func (mod *Chromium) Routes() ([]api.Route, error) {
 
 	return []api.Route{
 		convertUrlRoute(mod, mod.engine),
+		screenshotUrlRoute(mod),
 		convertHtmlRoute(mod, mod.engine),
+		screenshotHtmlRoute(mod),
 		convertMarkdownRoute(mod, mod.engine),
+		screenshotMarkdownRoute(mod),
 	}, nil
 }
 
 // Pdf converts a URL to PDF.
-func (mod *Chromium) Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
-	// FIXME: no error wrapping because it leaks on console exceptions output.
+func (mod *Chromium) Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
+	// Note: no error wrapping because it leaks on errors we want to display to
+	// the end user.
 	return mod.supervisor.Run(ctx, logger, func() error {
 		return mod.browser.pdf(ctx, logger, url, outputPath, options)
 	})
 }
 
+func (mod *Chromium) Screenshot(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+	// Note: no error wrapping because it leaks on errors we want to display to
+	// the end user.
+	return mod.supervisor.Run(ctx, logger, func() error {
+		return mod.browser.screenshot(ctx, logger, url, outputPath, options)
+	})
+}
+
 // Interface guards.
 var (
 	_ gotenberg.Module          = (*Chromium)(nil)

pkg/modules/chromium/chromium_test.go

@@ -11,7 +11,7 @@ import (
 	"github.com/alexliesenfeld/health"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestDefaultOptions(t *testing.T) {
@@ -23,6 +23,24 @@ func TestDefaultOptions(t *testing.T) {
 	}
 }
 
+func TestDefaultPdfOptions(t *testing.T) {
+	actual := DefaultPdfOptions()
+	notExpect := PdfOptions{}
+
+	if reflect.DeepEqual(actual, notExpect) {
+		t.Errorf("expected %v and got identical %v", actual, notExpect)
+	}
+}
+
+func TestDefaultScreenshotOptions(t *testing.T) {
+	actual := DefaultScreenshotOptions()
+	notExpect := ScreenshotOptions{}
+
+	if reflect.DeepEqual(actual, notExpect) {
+		t.Errorf("expected %v and got identical %v", actual, notExpect)
+	}
+}
+
 func TestChromium_Descriptor(t *testing.T) {
 	descriptor := new(Chromium).Descriptor()
 
@@ -334,26 +352,16 @@ func TestChromium_Metrics(t *testing.T) {
 		t.Fatalf("expected no error but got: %v", err)
 	}
 
-	if len(metrics) != 4 {
-		t.Fatalf("expected %d metrics, but got %d", 4, len(metrics))
+	if len(metrics) != 2 {
+		t.Fatalf("expected %d metrics, but got %d", 2, len(metrics))
 	}
 
 	actual := metrics[0].Read()
-	if actual != float64(1) {
-		t.Errorf("expected %f for chromium_active_instances_count, but got %f", float64(1), actual)
-	}
-
-	actual = metrics[1].Read()
-	if actual != float64(0) {
-		t.Errorf("expected %f for chromium_failed_starts_count, but got %f", float64(0), actual)
-	}
-
-	actual = metrics[2].Read()
 	if actual != float64(10) {
 		t.Errorf("expected %f for chromium_requests_queue_size, but got %f", float64(10), actual)
 	}
 
-	actual = metrics[3].Read()
+	actual = metrics[1].Read()
 	if actual != float64(0) {
 		t.Errorf("expected %f for chromium_restarts_count, but got %f", float64(0), actual)
 	}
@@ -399,6 +407,61 @@ func TestChromium_Checks(t *testing.T) {
 	}
 }
 
+func TestChromium_Ready(t *testing.T) {
+	for _, tc := range []struct {
+		scenario     string
+		autoStart    bool
+		startTimeout time.Duration
+		browser      browser
+		expectError  bool
+	}{
+		{
+			scenario:     "no auto-start",
+			autoStart:    false,
+			startTimeout: time.Duration(30) * time.Second,
+			browser: &browserMock{ProcessMock: gotenberg.ProcessMock{HealthyMock: func(logger *zap.Logger) bool {
+				return false
+			}}},
+			expectError: false,
+		},
+		{
+			scenario:     "auto-start: context done",
+			autoStart:    true,
+			startTimeout: time.Duration(200) * time.Millisecond,
+			browser: &browserMock{ProcessMock: gotenberg.ProcessMock{HealthyMock: func(logger *zap.Logger) bool {
+				return false
+			}}},
+			expectError: true,
+		},
+		{
+			scenario:     "auto-start success",
+			autoStart:    true,
+			startTimeout: time.Duration(30) * time.Second,
+			browser: &browserMock{ProcessMock: gotenberg.ProcessMock{HealthyMock: func(logger *zap.Logger) bool {
+				return true
+			}}},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := new(Chromium)
+			mod.autoStart = tc.autoStart
+			mod.args = browserArguments{wsUrlReadTimeout: tc.startTimeout}
+			mod.browser = tc.browser
+
+			err := mod.Ready()
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
 func TestChromium_Chromium(t *testing.T) {
 	mod := new(Chromium)
 
@@ -416,7 +479,7 @@ func TestChromium_Routes(t *testing.T) {
 	}{
 		{
 			scenario:      "routes not disabled",
-			expectRoutes:  3,
+			expectRoutes:  6,
 			disableRoutes: false,
 		},
 		{
@@ -450,14 +513,14 @@ func TestChromium_Pdf(t *testing.T) {
 	}{
 		{
 			scenario: "PDF task success",
-			browser: &browserMock{pdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+			browser: &browserMock{pdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
 				return nil
 			}},
 			expectError: false,
 		},
 		{
 			scenario: "PDF task error",
-			browser: &browserMock{pdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+			browser: &browserMock{pdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
 				return errors.New("PDF task error")
 			}},
 			expectError: true,
@@ -470,7 +533,49 @@ func TestChromium_Pdf(t *testing.T) {
 			}}
 			mod.browser = tc.browser
 
-			err := mod.Pdf(context.Background(), zap.NewNop(), "", "", Options{})
+			err := mod.Pdf(context.Background(), zap.NewNop(), "", "", PdfOptions{})
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
+func TestChromium_Screenshot(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		supervisor  gotenberg.ProcessSupervisor
+		browser     browser
+		expectError bool
+	}{
+		{
+			scenario: "Screenshot task success",
+			browser: &browserMock{screenshotMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+				return nil
+			}},
+			expectError: false,
+		},
+		{
+			scenario: "Screenshot task error",
+			browser: &browserMock{screenshotMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+				return errors.New("screenshot task error")
+			}},
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := new(Chromium)
+			mod.supervisor = &gotenberg.ProcessSupervisorMock{RunMock: func(ctx context.Context, logger *zap.Logger, task func() error) error {
+				return task()
+			}}
+			mod.browser = tc.browser
+
+			err := mod.Screenshot(context.Background(), zap.NewNop(), "", "", ScreenshotOptions{})
 
 			if !tc.expectError && err != nil {
 				t.Fatalf("expected no error but got: %v", err)

pkg/modules/chromium/events.go

@@ -3,7 +3,8 @@ package chromium
 import (
 	"context"
 	"fmt"
-	"regexp"
+	"net/http"
+	"slices"
 	"sync"
 
 	"github.com/chromedp/cdproto/cdp"
@@ -12,14 +13,30 @@ import (
 	"github.com/chromedp/cdproto/page"
 	"github.com/chromedp/cdproto/runtime"
 	"github.com/chromedp/chromedp"
+	"github.com/dlclark/regexp2"
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
 	"golang.org/x/sync/errgroup"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
+type eventRequestPausedOptions struct {
+	allowList, denyList *regexp2.Regexp
+	extraHttpHeaders    []ExtraHttpHeader
+}
+
 // listenForEventRequestPaused listens for requests to check if they are
-// allowed or not.
-func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowList *regexp.Regexp, denyList *regexp.Regexp) {
+// allowed or not.  It also set the extra HTTP headers, if any.
+// See https://github.com/gotenberg/gotenberg/issues/1011.
+// TODO: https://chromedevtools.github.io/devtools-protocol/tot/Network/#method-setBlockedURLs (experimental for now).
+func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, options eventRequestPausedOptions) {
+	if len(options.extraHttpHeaders) == 0 {
+		logger.Debug("no extra HTTP headers")
+	} else {
+		logger.Debug(fmt.Sprintf("extra HTTP headers: %+v", options.extraHttpHeaders))
+	}
+
 	chromedp.ListenTarget(ctx, func(ev interface{}) {
 		switch e := ev.(type) {
 		case *fetch.EventRequestPaused:
@@ -27,39 +44,229 @@ func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowL
 				logger.Debug(fmt.Sprintf("event EventRequestPaused fired for '%s'", e.Request.URL))
 				allow := true
 
-				if !allowList.MatchString(e.Request.URL) {
-					logger.Warn(fmt.Sprintf("'%s' does not match the expression from the allowed list", e.Request.URL))
-					allow = false
+				deadline, ok := ctx.Deadline()
+				if !ok {
+					logger.Error("context has no deadline, cannot filter URL")
+					return
 				}
 
-				if denyList.String() != "" && denyList.MatchString(e.Request.URL) {
-					logger.Warn(fmt.Sprintf("'%s' matches the expression from the denied list", e.Request.URL))
+				err := gotenberg.FilterDeadline(options.allowList, options.denyList, e.Request.URL, deadline)
+				if err != nil {
+					logger.Warn(err.Error())
 					allow = false
 				}
 
 				cctx := chromedp.FromContext(ctx)
 				executorCtx := cdp.WithExecutor(ctx, cctx.Target)
 
-				if allow {
-					req := fetch.ContinueRequest(e.RequestID)
-					err := req.Do(executorCtx)
+				if !allow {
+					req := fetch.FailRequest(e.RequestID, network.ErrorReasonAccessDenied)
+					err = req.Do(executorCtx)
 					if err != nil {
-						logger.Error(fmt.Sprintf("continue request: %s", err))
+						logger.Error(fmt.Sprintf("fail request: %s", err))
 					}
-
 					return
 				}
 
-				req := fetch.FailRequest(e.RequestID, network.ErrorReasonAccessDenied)
-				err := req.Do(executorCtx)
+				req := fetch.ContinueRequest(e.RequestID)
+
+				var extraHttpHeadersToSet []ExtraHttpHeader
+				if len(options.extraHttpHeaders) > 0 {
+					// The user want to set extra HTTP headers.
+
+					// First, we have to check if at least one header has to be
+					// set for current request.
+					for _, header := range options.extraHttpHeaders {
+						if header.Scope == nil {
+							// Non-scoped header.
+							logger.Debug(fmt.Sprintf("extra HTTP header '%s' will be set for request URL '%s'", header.Name, e.Request.URL))
+							extraHttpHeadersToSet = append(extraHttpHeadersToSet, header)
+							continue
+						}
+
+						ok, err := header.Scope.MatchString(e.Request.URL)
+						if err != nil {
+							logger.Error(fmt.Sprintf("fail to match extra HTTP header '%s' scope with URL '%s': %s", header.Name, e.Request.URL, err))
+						} else if ok {
+							logger.Debug(fmt.Sprintf("extra HTTP header '%s' (scoped) will be set for request URL '%s'", header.Name, e.Request.URL))
+							extraHttpHeadersToSet = append(extraHttpHeadersToSet, header)
+						} else {
+							logger.Debug(fmt.Sprintf("scoped extra HTTP header '%s' (scoped) will not be set for request URL '%s'", header.Name, e.Request.URL))
+						}
+					}
+				}
+
+				if len(extraHttpHeadersToSet) > 0 {
+					logger.Debug(fmt.Sprintf("setting extra HTTP headers for request URL '%s': %+v", e.Request.URL, extraHttpHeadersToSet))
+
+					originalHeaders := e.Request.Headers
+					headers := make(map[string]string)
+
+					for key, value := range originalHeaders {
+						strValue, ok := value.(string)
+						if ok {
+							headers[key] = strValue
+						} else {
+							logger.Error(fmt.Sprintf("ignoring header '%s' for URL '%s' since it cannot be cast to a string", key, e.Request.URL))
+						}
+					}
+
+					var headersEntries []*fetch.HeaderEntry
+					for key, value := range headers {
+						headersEntries = append(headersEntries, &fetch.HeaderEntry{
+							Name:  key,
+							Value: value,
+						})
+					}
+					for _, header := range extraHttpHeadersToSet {
+						headersEntries = append(headersEntries, &fetch.HeaderEntry{
+							Name:  header.Name,
+							Value: header.Value,
+						})
+					}
+
+					req.Headers = headersEntries
+				}
+
+				err = req.Do(executorCtx)
 				if err != nil {
-					logger.Error(fmt.Sprintf("fail request: %s", err))
+					logger.Error(fmt.Sprintf("continue request: %s", err))
 				}
 			}()
 		}
 	})
 }
 
+type eventResponseReceivedOptions struct {
+	mainPageUrl                     string
+	failOnHttpStatusCodes           []int64
+	invalidHttpStatusCode           *error
+	invalidHttpStatusCodeMu         *sync.RWMutex
+	failOnResourceOnHttpStatusCode  []int64
+	invalidResourceHttpStatusCode   *error
+	invalidResourceHttpStatusCodeMu *sync.RWMutex
+}
+
+// listenForEventResponseReceived listens for an invalid HTTP status code that
+// is returned by the main page or by one or more resources.
+// See:
+// https://github.com/gotenberg/gotenberg/issues/613.
+// https://github.com/gotenberg/gotenberg/issues/1021.
+func listenForEventResponseReceived(
+	ctx context.Context,
+	logger *zap.Logger,
+	options eventResponseReceivedOptions,
+) {
+	for _, code := range []int64{199, 299, 399, 499, 599} {
+		if slices.Contains(options.failOnHttpStatusCodes, code) {
+			for i := code - 99; i <= code; i++ {
+				options.failOnHttpStatusCodes = append(options.failOnHttpStatusCodes, i)
+			}
+		}
+
+		if slices.Contains(options.failOnResourceOnHttpStatusCode, code) {
+			for i := code - 99; i <= code; i++ {
+				options.failOnResourceOnHttpStatusCode = append(options.failOnResourceOnHttpStatusCode, i)
+			}
+		}
+	}
+
+	chromedp.ListenTarget(ctx, func(ev interface{}) {
+		switch ev := ev.(type) {
+		case *network.EventResponseReceived:
+			if ev.Response.URL == options.mainPageUrl {
+				logger.Debug(fmt.Sprintf("event EventResponseReceived fired for main page: %+v", ev.Response))
+
+				if slices.Contains(options.failOnHttpStatusCodes, ev.Response.Status) {
+					options.invalidHttpStatusCodeMu.Lock()
+					defer options.invalidHttpStatusCodeMu.Unlock()
+
+					*options.invalidHttpStatusCode = fmt.Errorf("%d: %s", ev.Response.Status, ev.Response.StatusText)
+				}
+
+				return
+			}
+
+			logger.Debug(fmt.Sprintf("event EventResponseReceived fired for a resource: %+v", ev.Response))
+
+			if slices.Contains(options.failOnResourceOnHttpStatusCode, ev.Response.Status) {
+				options.invalidResourceHttpStatusCodeMu.Lock()
+				defer options.invalidResourceHttpStatusCodeMu.Unlock()
+
+				*options.invalidResourceHttpStatusCode = multierr.Append(
+					*options.invalidResourceHttpStatusCode,
+					fmt.Errorf("%s - %d: %s", ev.Response.URL, ev.Response.Status, http.StatusText(int(ev.Response.Status))),
+				)
+			}
+		}
+	})
+}
+
+type eventLoadingFailedOptions struct {
+	loadingFailed           *error
+	loadingFailedMu         *sync.RWMutex
+	resourceLoadingFailed   *error
+	resourceLoadingFailedMu *sync.RWMutex
+}
+
+// listenForEventLoadingFailed listens for an event indicating that the main
+// page or one or more resources failed to load.
+// See:
+// https://github.com/gotenberg/gotenberg/issues/913.
+// https://github.com/gotenberg/gotenberg/issues/959.
+// https://github.com/gotenberg/gotenberg/issues/1021.
+func listenForEventLoadingFailed(ctx context.Context, logger *zap.Logger, options eventLoadingFailedOptions) {
+	chromedp.ListenTarget(ctx, func(ev interface{}) {
+		switch ev := ev.(type) {
+		case *network.EventLoadingFailed:
+			logger.Debug(fmt.Sprintf("event EventLoadingFailed fired: %+v", ev.ErrorText))
+
+			// We are looking for common errors.
+			// TODO: sufficient?
+			errors := []string{
+				"net::ERR_CONNECTION_CLOSED",
+				"net::ERR_CONNECTION_RESET",
+				"net::ERR_CONNECTION_REFUSED",
+				"net::ERR_CONNECTION_ABORTED",
+				"net::ERR_CONNECTION_FAILED",
+				"net::ERR_NAME_NOT_RESOLVED",
+				"net::ERR_INTERNET_DISCONNECTED",
+				"net::ERR_ADDRESS_UNREACHABLE",
+				"net::ERR_BLOCKED_BY_CLIENT",
+				"net::ERR_BLOCKED_BY_RESPONSE",
+				"net::ERR_FILE_NOT_FOUND",
+			}
+			if !slices.Contains(errors, ev.ErrorText) {
+				logger.Debug(fmt.Sprintf("skip EventLoadingFailed: '%s' is not part of %+v", ev.ErrorText, errors))
+				return
+			}
+
+			if ev.Type == network.ResourceTypeDocument {
+				// Supposition: except iframe, an event loading failed with a
+				// resource type Document is about the main page.
+				logger.Debug("event EventLoadingFailed fired for main page")
+
+				options.loadingFailedMu.Lock()
+				defer options.loadingFailedMu.Unlock()
+
+				*options.loadingFailed = fmt.Errorf("%s", ev.ErrorText)
+
+				return
+			}
+
+			logger.Debug("event EventLoadingFailed fired for a resource")
+
+			options.resourceLoadingFailedMu.Lock()
+			defer options.resourceLoadingFailedMu.Unlock()
+
+			*options.resourceLoadingFailed = multierr.Append(
+				*options.resourceLoadingFailed,
+				fmt.Errorf("resource %s: %s", ev.Type, ev.ErrorText),
+			)
+		}
+	})
+}
+
 // listenForEventExceptionThrown listens for exceptions in the console and
 // appends those exceptions to the given error pointer.
 // See https://github.com/gotenberg/gotenberg/issues/262.
@@ -179,7 +386,6 @@ func waitForEventLoadingFinished(ctx context.Context, logger *zap.Logger) func()
 // completed or an error is encountered.
 func runBatch(ctx context.Context, fn ...func() error) error {
 	eg, _ := errgroup.WithContext(ctx)
-
 	for _, f := range fn {
 		eg.Go(f)
 	}

pkg/modules/chromium/mocks.go

@@ -5,28 +5,38 @@ import (
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 // ApiMock is a mock for the [Api] interface.
 type ApiMock struct {
-	PdfMock func(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error
+	PdfMock        func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error
+	ScreenshotMock func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error
 }
 
-func (api *ApiMock) Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+func (api *ApiMock) Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
 	return api.PdfMock(ctx, logger, url, outputPath, options)
 }
 
+func (api *ApiMock) Screenshot(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+	return api.ScreenshotMock(ctx, logger, url, outputPath, options)
+}
+
 // browserMock is a mock for the [browser] interface.
 type browserMock struct {
 	gotenberg.ProcessMock
-	pdfMock func(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error
+	pdfMock        func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error
+	screenshotMock func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error
 }
 
-func (b *browserMock) pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+func (b *browserMock) pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
 	return b.pdfMock(ctx, logger, url, outputPath, options)
 }
 
+func (b *browserMock) screenshot(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+	return b.screenshotMock(ctx, logger, url, outputPath, options)
+}
+
 // Interface guards.
 var (
 	_ Api     = (*ApiMock)(nil)

pkg/modules/chromium/mocks_test.go

@@ -9,26 +9,42 @@ import (
 
 func TestApiMock(t *testing.T) {
 	mock := &ApiMock{
-		PdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+		PdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
+			return nil
+		},
+		ScreenshotMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
 			return nil
 		},
 	}
 
-	err := mock.Pdf(context.Background(), zap.NewNop(), "", "", Options{})
+	err := mock.Pdf(context.Background(), zap.NewNop(), "", "", PdfOptions{})
 	if err != nil {
 		t.Errorf("expected no error from ApiMock.Pdf, but got: %v", err)
 	}
+
+	err = mock.Screenshot(context.Background(), zap.NewNop(), "", "", ScreenshotOptions{})
+	if err != nil {
+		t.Errorf("expected no error from ApiMock.Screenshot, but got: %v", err)
+	}
 }
 
 func TestBrowserMock(t *testing.T) {
 	mock := &browserMock{
-		pdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options Options) error {
+		pdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
+			return nil
+		},
+		screenshotMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
 			return nil
 		},
 	}
 
-	err := mock.pdf(context.Background(), zap.NewNop(), "", "", Options{})
+	err := mock.pdf(context.Background(), zap.NewNop(), "", "", PdfOptions{})
 	if err != nil {
 		t.Errorf("expected no error from browserMock.pdf, but got: %v", err)
 	}
+
+	err = mock.screenshot(context.Background(), zap.NewNop(), "", "", ScreenshotOptions{})
+	if err != nil {
+		t.Errorf("expected no error from browserMock.screenshot, but got: %v", err)
+	}
 }

pkg/modules/chromium/routes.go

@@ -9,111 +9,229 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"time"
 
+	"github.com/dlclark/regexp2"
 	"github.com/labstack/echo/v4"
 	"github.com/microcosm-cc/bluemonday"
 	"github.com/russross/blackfriday/v2"
 	"go.uber.org/multierr"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/pdfengines"
 )
 
-// FormDataChromiumPdfOptions creates [Options] from the form data. Fallback to
+// FormDataChromiumOptions creates [Options] from the form data. Fallback to
 // default value if the considered key is not present.
-func FormDataChromiumPdfOptions(ctx *api.Context) (*api.FormData, Options) {
+func FormDataChromiumOptions(ctx *api.Context) (*api.FormData, Options) {
 	defaultOptions := DefaultOptions()
 
 	var (
-		failOnConsoleExceptions                          bool
-		waitDelay                                        time.Duration
-		waitWindowStatus                                 string
-		waitForExpression                                string
-		userAgent                                        string
-		extraHttpHeaders                                 map[string]string
-		emulatedMediaType                                string
-		landscape, printBackground, omitBackground       bool
-		scale, paperWidth, paperHeight                   float64
-		marginTop, marginBottom, marginLeft, marginRight float64
-		pageRanges                                       string
-		headerTemplate, footerTemplate                   string
-		preferCssPageSize                                bool
+		skipNetworkIdleEvent          bool
+		failOnHttpStatusCodes         []int64
+		failOnResourceHttpStatusCodes []int64
+		failOnResourceLoadingFailed   bool
+		failOnConsoleExceptions       bool
+		waitDelay                     time.Duration
+		waitWindowStatus              string
+		waitForExpression             string
+		cookies                       []Cookie
+		userAgent                     string
+		extraHttpHeaders              []ExtraHttpHeader
+		emulatedMediaType             string
+		omitBackground                bool
 	)
 
 	form := ctx.FormData().
-		Bool("failOnConsoleExceptions", &failOnConsoleExceptions, defaultOptions.FailOnConsoleExceptions).
-		Duration("waitDelay", &waitDelay, defaultOptions.WaitDelay).
-		String("waitWindowStatus", &waitWindowStatus, defaultOptions.WaitWindowStatus).
-		String("waitForExpression", &waitForExpression, defaultOptions.WaitForExpression).
-		String("userAgent", &userAgent, ""). // FIXME: deprecated.
-		Custom("extraHttpHeaders", func(value string) error {
+		Bool("skipNetworkIdleEvent", &skipNetworkIdleEvent, defaultOptions.SkipNetworkIdleEvent).
+		Custom("failOnHttpStatusCodes", func(value string) error {
 			if value == "" {
-				extraHttpHeaders = defaultOptions.ExtraHttpHeaders
-
+				failOnHttpStatusCodes = defaultOptions.FailOnHttpStatusCodes
 				return nil
 			}
 
-			err := json.Unmarshal([]byte(value), &extraHttpHeaders)
+			err := json.Unmarshal([]byte(value), &failOnHttpStatusCodes)
 			if err != nil {
-				return fmt.Errorf("unmarshal extra HTTP headers: %w", err)
+				return fmt.Errorf("unmarshal failOnHttpStatusCodes: %w", err)
 			}
 
 			return nil
 		}).
+		Custom("failOnResourceHttpStatusCodes", func(value string) error {
+			if value == "" {
+				failOnResourceHttpStatusCodes = defaultOptions.FailOnResourceHttpStatusCodes
+				return nil
+			}
+
+			err := json.Unmarshal([]byte(value), &failOnResourceHttpStatusCodes)
+			if err != nil {
+				return fmt.Errorf("unmarshal failOnResourceHttpStatusCodes: %w", err)
+			}
+
+			return nil
+		}).
+		Bool("failOnResourceLoadingFailed", &failOnResourceLoadingFailed, defaultOptions.FailOnResourceLoadingFailed).
+		Bool("failOnConsoleExceptions", &failOnConsoleExceptions, defaultOptions.FailOnConsoleExceptions).
+		Duration("waitDelay", &waitDelay, defaultOptions.WaitDelay).
+		String("waitWindowStatus", &waitWindowStatus, defaultOptions.WaitWindowStatus).
+		String("waitForExpression", &waitForExpression, defaultOptions.WaitForExpression).
+		Custom("cookies", func(value string) error {
+			if value == "" {
+				cookies = defaultOptions.Cookies
+				return nil
+			}
+
+			err := json.Unmarshal([]byte(value), &cookies)
+			if err != nil {
+				return fmt.Errorf("unmarshal cookies: %w", err)
+			}
+
+			for i, cookie := range cookies {
+				if strings.TrimSpace(cookie.Name) == "" || strings.TrimSpace(cookie.Value) == "" || strings.TrimSpace(cookie.Domain) == "" {
+					err = multierr.Append(err, fmt.Errorf("cookie %d must have its name, value and domain set", i))
+				}
+			}
+
+			return err
+		}).
+		String("userAgent", &userAgent, defaultOptions.UserAgent).
+		Custom("extraHttpHeaders", func(value string) error {
+			if value == "" {
+				extraHttpHeaders = defaultOptions.ExtraHttpHeaders
+				return nil
+			}
+
+			var headers map[string]string
+			err := json.Unmarshal([]byte(value), &headers)
+			if err != nil {
+				return fmt.Errorf("unmarshal extraHttpHeaders: %w", err)
+			}
+
+			for k, v := range headers {
+				var scope string
+				var valueTokens []string
+				var invalidScopeToken bool
+
+				tokens := strings.Split(v, ";")
+				for _, token := range tokens {
+					if strings.HasPrefix(strings.ToLower(strings.TrimSpace(token)), "scope") {
+						tokenNoSpaces := strings.Join(strings.Fields(token), "")
+						parts := strings.SplitN(tokenNoSpaces, "=", 2)
+
+						if len(parts) == 2 && strings.ToLower(parts[0]) == "scope" && parts[1] != "" {
+							scope = parts[1]
+						} else {
+							err = multierr.Append(err, fmt.Errorf("invalid scope '%s' for header '%s'", scope, k))
+							invalidScopeToken = true
+							break
+						}
+					} else {
+						if token != "" {
+							valueTokens = append(valueTokens, token)
+						}
+					}
+				}
+
+				if invalidScopeToken {
+					continue
+				}
+
+				var scopeRegexp *regexp2.Regexp
+				if len(scope) > 0 {
+					p, errCompile := regexp2.Compile(scope, 0)
+					if errCompile != nil {
+						err = multierr.Append(err, fmt.Errorf("invalid scope regex pattern for header '%s': %w", k, errCompile))
+						continue
+					}
+					scopeRegexp = p
+				}
+
+				extraHttpHeaders = append(extraHttpHeaders, ExtraHttpHeader{
+					Name:  k,
+					Value: strings.Join(valueTokens, "; "),
+					Scope: scopeRegexp,
+				})
+			}
+
+			return err
+		}).
 		Custom("emulatedMediaType", func(value string) error {
 			if value == "" {
 				emulatedMediaType = defaultOptions.EmulatedMediaType
-
 				return nil
 			}
 
 			if value != "screen" && value != "print" {
-				return fmt.Errorf("wrong value, expected either 'screen', 'print' or empty")
+				return errors.New("wrong value, expected either 'screen', 'print' or empty")
 			}
 
 			emulatedMediaType = value
 
 			return nil
 		}).
-		Bool("landscape", &landscape, defaultOptions.Landscape).
-		Bool("printBackground", &printBackground, defaultOptions.PrintBackground).
-		Bool("omitBackground", &omitBackground, defaultOptions.OmitBackground).
-		Float64("scale", &scale, defaultOptions.Scale).
-		Float64("paperWidth", &paperWidth, defaultOptions.PaperWidth).
-		Float64("paperHeight", &paperHeight, defaultOptions.PaperHeight).
-		Float64("marginTop", &marginTop, defaultOptions.MarginTop).
-		Float64("marginBottom", &marginBottom, defaultOptions.MarginBottom).
-		Float64("marginLeft", &marginLeft, defaultOptions.MarginLeft).
-		Float64("marginRight", &marginRight, defaultOptions.MarginRight).
-		String("nativePageRanges", &pageRanges, defaultOptions.PageRanges).
-		Content("header.html", &headerTemplate, defaultOptions.HeaderTemplate).
-		Content("footer.html", &footerTemplate, defaultOptions.FooterTemplate).
-		Bool("preferCssPageSize", &preferCssPageSize, defaultOptions.PreferCssPageSize)
-
-	// FIXME: deprecated.
-	if userAgent != "" {
-		ctx.Log().Warn("'userAgent' is deprecated; prefer the 'extraHttpHeaders' form field instead")
-
-		if extraHttpHeaders == nil {
-			extraHttpHeaders = make(map[string]string)
-		}
-
-		extraHttpHeaders["User-Agent"] = userAgent
-	}
+		Bool("omitBackground", &omitBackground, defaultOptions.OmitBackground)
 
 	options := Options{
-		FailOnConsoleExceptions: failOnConsoleExceptions,
-		WaitDelay:               waitDelay,
-		WaitWindowStatus:        waitWindowStatus,
-		WaitForExpression:       waitForExpression,
-		ExtraHttpHeaders:        extraHttpHeaders,
-		EmulatedMediaType:       emulatedMediaType,
+		SkipNetworkIdleEvent:          skipNetworkIdleEvent,
+		FailOnHttpStatusCodes:         failOnHttpStatusCodes,
+		FailOnResourceHttpStatusCodes: failOnResourceHttpStatusCodes,
+		FailOnResourceLoadingFailed:   failOnResourceLoadingFailed,
+		FailOnConsoleExceptions:       failOnConsoleExceptions,
+		WaitDelay:                     waitDelay,
+		WaitWindowStatus:              waitWindowStatus,
+		WaitForExpression:             waitForExpression,
+		Cookies:                       cookies,
+		UserAgent:                     userAgent,
+		ExtraHttpHeaders:              extraHttpHeaders,
+		EmulatedMediaType:             emulatedMediaType,
+		OmitBackground:                omitBackground,
+	}
+
+	return form, options
+}
+
+// FormDataChromiumPdfOptions creates [PdfOptions] from the form data. Fallback to
+// default value if the considered key is not present.
+func FormDataChromiumPdfOptions(ctx *api.Context) (*api.FormData, PdfOptions) {
+	form, options := FormDataChromiumOptions(ctx)
+	defaultPdfOptions := DefaultPdfOptions()
+
+	var (
+		landscape, printBackground, singlePage           bool
+		scale, paperWidth, paperHeight                   float64
+		marginTop, marginBottom, marginLeft, marginRight float64
+		pageRanges                                       string
+		headerTemplate, footerTemplate                   string
+		preferCssPageSize                                bool
+		generateDocumentOutline                          bool
+	)
+
+	form.
+		Bool("landscape", &landscape, defaultPdfOptions.Landscape).
+		Bool("printBackground", &printBackground, defaultPdfOptions.PrintBackground).
+		Float64("scale", &scale, defaultPdfOptions.Scale).
+		Bool("singlePage", &singlePage, defaultPdfOptions.SinglePage).
+		Inches("paperWidth", &paperWidth, defaultPdfOptions.PaperWidth).
+		Inches("paperHeight", &paperHeight, defaultPdfOptions.PaperHeight).
+		Inches("marginTop", &marginTop, defaultPdfOptions.MarginTop).
+		Inches("marginBottom", &marginBottom, defaultPdfOptions.MarginBottom).
+		Inches("marginLeft", &marginLeft, defaultPdfOptions.MarginLeft).
+		Inches("marginRight", &marginRight, defaultPdfOptions.MarginRight).
+		String("nativePageRanges", &pageRanges, defaultPdfOptions.PageRanges).
+		Content("header.html", &headerTemplate, defaultPdfOptions.HeaderTemplate).
+		Content("footer.html", &footerTemplate, defaultPdfOptions.FooterTemplate).
+		Bool("preferCssPageSize", &preferCssPageSize, defaultPdfOptions.PreferCssPageSize).
+		Bool("generateDocumentOutline", &generateDocumentOutline, defaultPdfOptions.GenerateDocumentOutline)
+
+	pdfOptions := PdfOptions{
+		Options:                 options,
 		Landscape:               landscape,
 		PrintBackground:         printBackground,
-		OmitBackground:          omitBackground,
 		Scale:                   scale,
+		SinglePage:              singlePage,
 		PaperWidth:              paperWidth,
 		PaperHeight:             paperHeight,
 		MarginTop:               marginTop,
@@ -124,42 +242,79 @@ func FormDataChromiumPdfOptions(ctx *api.Context) (*api.FormData, Options) {
 		HeaderTemplate:          headerTemplate,
 		FooterTemplate:          footerTemplate,
 		PreferCssPageSize:       preferCssPageSize,
+		GenerateDocumentOutline: generateDocumentOutline,
 	}
 
-	return form, options
+	return form, pdfOptions
 }
 
-// FormDataChromiumPdfFormats creates [gotenberg.PdfFormats] from the form
+// FormDataChromiumScreenshotOptions creates [ScreenshotOptions] from the form
 // data. Fallback to default value if the considered key is not present.
-func FormDataChromiumPdfFormats(ctx *api.Context) gotenberg.PdfFormats {
+func FormDataChromiumScreenshotOptions(ctx *api.Context) (*api.FormData, ScreenshotOptions) {
+	form, options := FormDataChromiumOptions(ctx)
+	defaultScreenshotOptions := DefaultScreenshotOptions()
+
 	var (
-		pdfFormat string
-		pdfa      string
-		pdfua     bool
+		width, height    int
+		clip             bool
+		format           string
+		quality          int
+		optimizeForSpeed bool
 	)
 
-	ctx.FormData().
-		String("pdfFormat", &pdfFormat, "").
-		String("pdfa", &pdfa, "").
-		Bool("pdfua", &pdfua, false)
+	form.
+		Int("width", &width, defaultScreenshotOptions.Width).
+		Int("height", &height, defaultScreenshotOptions.Height).
+		Bool("clip", &clip, defaultScreenshotOptions.Clip).
+		Custom("format", func(value string) error {
+			if value == "" {
+				format = defaultScreenshotOptions.Format
+				return nil
+			}
 
-	// FIXME: deprecated.
-	// pdfa > pdfFormat.
-	var actualPdfArchive string
+			if value != "png" && value != "jpeg" && value != "webp" {
+				return fmt.Errorf("wrong value, expected either 'png', 'jpeg' or 'webp'")
+			}
 
-	if pdfFormat != "" {
-		ctx.Log().Warn("'pdfFormat' is deprecated; prefer the 'pdfa' form field instead")
-		actualPdfArchive = pdfFormat
+			format = value
+
+			return nil
+		}).
+		Custom("quality", func(value string) error {
+			if value == "" {
+				quality = defaultScreenshotOptions.Quality
+				return nil
+			}
+
+			intValue, err := strconv.Atoi(value)
+			if err != nil {
+				return err
+			}
+
+			if intValue < 0 {
+				return errors.New("value is negative")
+			}
+
+			if intValue > 100 {
+				return errors.New("value is superior to 100")
+			}
+
+			quality = intValue
+			return nil
+		}).
+		Bool("optimizeForSpeed", &optimizeForSpeed, defaultScreenshotOptions.OptimizeForSpeed)
+
+	screenshotOptions := ScreenshotOptions{
+		Options:          options,
+		Width:            width,
+		Height:           height,
+		Clip:             clip,
+		Format:           format,
+		Quality:          quality,
+		OptimizeForSpeed: optimizeForSpeed,
 	}
 
-	if pdfa != "" {
-		actualPdfArchive = pdfa
-	}
-
-	return gotenberg.PdfFormats{
-		PdfA:  actualPdfArchive,
-		PdfUa: pdfua,
-	}
+	return form, screenshotOptions
 }
 
 // convertUrlRoute returns an [api.Route] which can convert a URL to PDF.
@@ -171,7 +326,9 @@ func convertUrlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
 			form, options := FormDataChromiumPdfOptions(ctx)
-			pdfFormats := FormDataChromiumPdfFormats(ctx)
+			mode := pdfengines.FormDataPdfSplitMode(form, false)
+			pdfFormats := pdfengines.FormDataPdfFormats(form)
+			metadata := pdfengines.FormDataPdfMetadata(form, false)
 
 			var url string
 			err := form.
@@ -181,7 +338,7 @@ func convertUrlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			err = convertUrl(ctx, chromium, engine, url, pdfFormats, options)
+			err = convertUrl(ctx, chromium, engine, url, options, mode, pdfFormats, metadata)
 			if err != nil {
 				return fmt.Errorf("convert URL to PDF: %w", err)
 			}
@@ -191,6 +348,35 @@ func convertUrlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 	}
 }
 
+// screenshotUrlRoute returns an [api.Route] which can take a screenshot from a
+// URL.
+func screenshotUrlRoute(chromium Api) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/chromium/screenshot/url",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+			form, options := FormDataChromiumScreenshotOptions(ctx)
+
+			var url string
+			err := form.
+				MandatoryString("url", &url).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			err = screenshotUrl(ctx, chromium, url, options)
+			if err != nil {
+				return fmt.Errorf("URL screenshot: %w", err)
+			}
+
+			return nil
+		},
+	}
+}
+
 // convertHtmlRoute returns an [api.Route] which can convert an HTML file to
 // PDF.
 func convertHtmlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
@@ -201,7 +387,9 @@ func convertHtmlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
 			form, options := FormDataChromiumPdfOptions(ctx)
-			pdfFormats := FormDataChromiumPdfFormats(ctx)
+			mode := pdfengines.FormDataPdfSplitMode(form, false)
+			pdfFormats := pdfengines.FormDataPdfFormats(form)
+			metadata := pdfengines.FormDataPdfMetadata(form, false)
 
 			var inputPath string
 			err := form.
@@ -212,7 +400,7 @@ func convertHtmlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 			}
 
 			url := fmt.Sprintf("file://%s", inputPath)
-			err = convertUrl(ctx, chromium, engine, url, pdfFormats, options)
+			err = convertUrl(ctx, chromium, engine, url, options, mode, pdfFormats, metadata)
 			if err != nil {
 				return fmt.Errorf("convert HTML to PDF: %w", err)
 			}
@@ -222,6 +410,36 @@ func convertHtmlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 	}
 }
 
+// screenshotHtmlRoute returns an [api.Route] which can take a screenshot from
+// an HTML file.
+func screenshotHtmlRoute(chromium Api) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/chromium/screenshot/html",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+			form, options := FormDataChromiumScreenshotOptions(ctx)
+
+			var inputPath string
+			err := form.
+				MandatoryPath("index.html", &inputPath).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			url := fmt.Sprintf("file://%s", inputPath)
+			err = screenshotUrl(ctx, chromium, url, options)
+			if err != nil {
+				return fmt.Errorf("HTML screenshot: %w", err)
+			}
+
+			return nil
+		},
+	}
+}
+
 // convertMarkdownRoute returns an [api.Route] which can convert markdown files
 // to PDF.
 func convertMarkdownRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
@@ -232,7 +450,9 @@ func convertMarkdownRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
 			form, options := FormDataChromiumPdfOptions(ctx)
-			pdfFormats := FormDataChromiumPdfFormats(ctx)
+			mode := pdfengines.FormDataPdfSplitMode(form, false)
+			pdfFormats := pdfengines.FormDataPdfFormats(form)
+			metadata := pdfengines.FormDataPdfMetadata(form, false)
 
 			var (
 				inputPath     string
@@ -247,80 +467,12 @@ func convertMarkdownRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			// We have to convert each markdown file referenced in the HTML
-			// file to... HTML. Thanks to the "html/template" package, we are
-			// able to provide the "toHTML" function which the user may call
-			// directly inside the HTML file.
-
-			var markdownFilesNotFoundErr error
-
-			tmpl, err := template.
-				New(filepath.Base(inputPath)).
-				Funcs(template.FuncMap{
-					"toHTML": func(filename string) (template.HTML, error) {
-						var path string
-
-						for _, markdownPath := range markdownPaths {
-							markdownFilename := filepath.Base(markdownPath)
-
-							if filename == markdownFilename {
-								path = markdownPath
-								break
-							}
-						}
-
-						if path == "" {
-							markdownFilesNotFoundErr = multierr.Append(
-								markdownFilesNotFoundErr,
-								fmt.Errorf("'%s'", filename),
-							)
-
-							return "", nil
-						}
-
-						b, err := os.ReadFile(path)
-						if err != nil {
-							return "", fmt.Errorf("read markdown file '%s': %w", filename, err)
-						}
-
-						unsafe := blackfriday.Run(b)
-						sanitized := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
-
-						// #nosec
-						return template.HTML(sanitized), nil
-					},
-				}).ParseFiles(inputPath)
+			url, err := markdownToHtml(ctx, inputPath, markdownPaths)
 			if err != nil {
-				return fmt.Errorf("parse template file: %w", err)
+				return fmt.Errorf("transform markdown file(s) to HTML: %w", err)
 			}
 
-			var buffer bytes.Buffer
-
-			err = tmpl.Execute(&buffer, &struct{}{})
-			if err != nil {
-				return fmt.Errorf("execute template: %w", err)
-			}
-
-			if markdownFilesNotFoundErr != nil {
-				return api.WrapError(
-					fmt.Errorf("markdown files not found: %w", markdownFilesNotFoundErr),
-					api.NewSentinelHttpError(
-						http.StatusBadRequest,
-						fmt.Sprintf("Markdown file(s) not found: %s", markdownFilesNotFoundErr),
-					),
-				)
-			}
-
-			inputPath = ctx.GeneratePath(".html")
-
-			err = os.WriteFile(inputPath, buffer.Bytes(), 0o600)
-			if err != nil {
-				return fmt.Errorf("write template result: %w", err)
-			}
-
-			url := fmt.Sprintf("file://%s", inputPath)
-
-			err = convertUrl(ctx, chromium, engine, url, pdfFormats, options)
+			err = convertUrl(ctx, chromium, engine, url, options, mode, pdfFormats, metadata)
 			if err != nil {
 				return fmt.Errorf("convert markdown to PDF: %w", err)
 			}
@@ -330,23 +482,126 @@ func convertMarkdownRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 	}
 }
 
-// convertUrl is a stub which is called by the other methods of this file.
-func convertUrl(ctx *api.Context, chromium Api, engine gotenberg.PdfEngine, url string, pdfFormats gotenberg.PdfFormats, options Options) error {
+// screenshotMarkdownRoute returns an [api.Route] which can take a screenshot
+// from markdown files.
+func screenshotMarkdownRoute(chromium Api) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/chromium/screenshot/markdown",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+			form, options := FormDataChromiumScreenshotOptions(ctx)
+
+			var (
+				inputPath     string
+				markdownPaths []string
+			)
+
+			err := form.
+				MandatoryPath("index.html", &inputPath).
+				MandatoryPaths([]string{".md"}, &markdownPaths).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			url, err := markdownToHtml(ctx, inputPath, markdownPaths)
+			if err != nil {
+				return fmt.Errorf("transform markdown file(s) to HTML: %w", err)
+			}
+
+			err = screenshotUrl(ctx, chromium, url, options)
+			if err != nil {
+				return fmt.Errorf("markdown screenshot: %w", err)
+			}
+
+			return nil
+		},
+	}
+}
+
+func markdownToHtml(ctx *api.Context, inputPath string, markdownPaths []string) (string, error) {
+	// We have to convert each markdown file referenced in the HTML
+	// file to... HTML. Thanks to the "html/template" package, we are
+	// able to provide the "toHTML" function which the user may call
+	// directly inside the HTML file.
+
+	var markdownFilesNotFoundErr error
+
+	tmpl, err := template.
+		New(filepath.Base(inputPath)).
+		Funcs(template.FuncMap{
+			"toHTML": func(filename string) (template.HTML, error) {
+				var path string
+
+				for _, markdownPath := range markdownPaths {
+					markdownFilename := filepath.Base(markdownPath)
+
+					if filename == markdownFilename {
+						path = markdownPath
+						break
+					}
+				}
+
+				if path == "" {
+					markdownFilesNotFoundErr = multierr.Append(
+						markdownFilesNotFoundErr,
+						fmt.Errorf("'%s'", filename),
+					)
+
+					return "", nil
+				}
+
+				b, err := os.ReadFile(path)
+				if err != nil {
+					return "", fmt.Errorf("read markdown file '%s': %w", filename, err)
+				}
+
+				unsafe := blackfriday.Run(b)
+				sanitized := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
+
+				// #nosec
+				return template.HTML(sanitized), nil
+			},
+		}).ParseFiles(inputPath)
+	if err != nil {
+		return "", fmt.Errorf("parse template file: %w", err)
+	}
+
+	var buffer bytes.Buffer
+
+	err = tmpl.Execute(&buffer, &struct{}{})
+	if err != nil {
+		return "", fmt.Errorf("execute template: %w", err)
+	}
+
+	if markdownFilesNotFoundErr != nil {
+		return "", api.WrapError(
+			fmt.Errorf("markdown files not found: %w", markdownFilesNotFoundErr),
+			api.NewSentinelHttpError(
+				http.StatusBadRequest,
+				fmt.Sprintf("Markdown file(s) not found: %s", markdownFilesNotFoundErr),
+			),
+		)
+	}
+
+	inputPath = ctx.GeneratePath(".html")
+
+	err = os.WriteFile(inputPath, buffer.Bytes(), 0o600)
+	if err != nil {
+		return "", fmt.Errorf("write template result: %w", err)
+	}
+
+	return fmt.Sprintf("file://%s", inputPath), nil
+}
+
+func convertUrl(ctx *api.Context, chromium Api, engine gotenberg.PdfEngine, url string, options PdfOptions, mode gotenberg.SplitMode, pdfFormats gotenberg.PdfFormats, metadata map[string]interface{}) error {
 	outputPath := ctx.GeneratePath(".pdf")
 
 	err := chromium.Pdf(ctx, ctx.Log(), url, outputPath, options)
+	err = handleChromiumError(err, options.Options)
 	if err != nil {
-
-		if errors.Is(err, ErrUrlNotAuthorized) {
-			return api.WrapError(
-				fmt.Errorf("convert to PDF: %w", err),
-				api.NewSentinelHttpError(
-					http.StatusForbidden,
-					fmt.Sprintf("'%s' does not match the authorized URLs", url),
-				),
-			)
-		}
-
 		if errors.Is(err, ErrOmitBackgroundWithoutPrintBackground) {
 			return api.WrapError(
 				fmt.Errorf("convert to PDF: %w", err),
@@ -357,23 +612,6 @@ func convertUrl(ctx *api.Context, chromium Api, engine gotenberg.PdfEngine, url
 			)
 		}
 
-		if errors.Is(err, ErrInvalidEvaluationExpression) {
-			if options.WaitForExpression == "" {
-				// We do not expect the 'waitWindowStatus' form field to return
-				// an ErrInvalidEvaluationExpression error. In such a scenario,
-				// we return a 500.
-				return fmt.Errorf("convert to PDF: %w", err)
-			}
-
-			return api.WrapError(
-				fmt.Errorf("convert to PDF: %w", err),
-				api.NewSentinelHttpError(
-					http.StatusBadRequest,
-					fmt.Sprintf("The expression '%s' (waitForExpression) returned an exception or undefined", options.WaitForExpression),
-				),
-			)
-		}
-
 		if errors.Is(err, ErrInvalidPrinterSettings) {
 			return api.WrapError(
 				fmt.Errorf("convert to PDF: %w", err),
@@ -394,45 +632,55 @@ func convertUrl(ctx *api.Context, chromium Api, engine gotenberg.PdfEngine, url
 			)
 		}
 
-		if errors.Is(err, ErrConsoleExceptions) {
-			return api.WrapError(
-				fmt.Errorf("convert to PDF: %w", err),
-				api.NewSentinelHttpError(
-					http.StatusConflict,
-					fmt.Sprintf("Chromium console exceptions:\n %s", strings.ReplaceAll(err.Error(), ErrConsoleExceptions.Error(), "")),
-				),
-			)
-		}
-
 		return fmt.Errorf("convert to PDF: %w", err)
 	}
 
-	// So far so good, the URL has been converted to PDF.
-	// Now, let's check if the client want to convert the resulting PDF
-	// to specific formats.
-	zeroValued := gotenberg.PdfFormats{}
-	if pdfFormats != zeroValued {
-		convertInputPath := outputPath
-		convertOutputPath := ctx.GeneratePath(".pdf")
+	outputPaths, err := pdfengines.SplitPdfStub(ctx, engine, mode, []string{outputPath})
+	if err != nil {
+		return fmt.Errorf("split PDF: %w", err)
+	}
 
-		err = engine.Convert(ctx, ctx.Log(), pdfFormats, convertInputPath, convertOutputPath)
+	convertOutputPaths, err := pdfengines.ConvertStub(ctx, engine, pdfFormats, outputPaths)
+	if err != nil {
+		return fmt.Errorf("convert PDF(s): %w", err)
+	}
 
-		if err != nil {
-			if errors.Is(err, gotenberg.ErrPdfFormatNotSupported) {
-				return api.WrapError(
-					fmt.Errorf("convert PDF: %w", err),
-					api.NewSentinelHttpError(
-						http.StatusBadRequest,
-						fmt.Sprintf("At least one PDF engine does not handle one of the PDF format in '%+v', while other have failed to convert for other reasons", pdfFormats),
-					),
-				)
+	err = pdfengines.WriteMetadataStub(ctx, engine, metadata, convertOutputPaths)
+	if err != nil {
+		return fmt.Errorf("write metadata: %w", err)
+	}
+
+	zeroValuedSplitMode := gotenberg.SplitMode{}
+	zeroValuedPdfFormats := gotenberg.PdfFormats{}
+	if mode != zeroValuedSplitMode && pdfFormats != zeroValuedPdfFormats {
+		// The PDF has been split and split parts have been converted to a
+		// specific format. We want to keep the split naming.
+		for i, convertOutputPath := range convertOutputPaths {
+			err = ctx.Rename(convertOutputPath, outputPaths[i])
+			if err != nil {
+				return fmt.Errorf("rename output path: %w", err)
 			}
-
-			return fmt.Errorf("convert PDF: %w", err)
 		}
+	} else {
+		outputPaths = convertOutputPaths
+	}
 
-		// Important: the output path is now the converted file.
-		outputPath = convertOutputPath
+	err = ctx.AddOutputPaths(outputPaths...)
+	if err != nil {
+		return fmt.Errorf("add output paths: %w", err)
+	}
+
+	return nil
+}
+
+func screenshotUrl(ctx *api.Context, chromium Api, url string, options ScreenshotOptions) error {
+	ext := fmt.Sprintf(".%s", options.Format)
+	outputPath := ctx.GeneratePath(ext)
+
+	err := chromium.Screenshot(ctx, ctx.Log(), url, outputPath, options)
+	err = handleChromiumError(err, options.Options)
+	if err != nil {
+		return fmt.Errorf("screenshot: %w", err)
 	}
 
 	err = ctx.AddOutputPaths(outputPath)
@@ -442,3 +690,78 @@ func convertUrl(ctx *api.Context, chromium Api, engine gotenberg.PdfEngine, url
 
 	return nil
 }
+
+func handleChromiumError(err error, options Options) error {
+	if err == nil {
+		return nil
+	}
+
+	if errors.Is(err, ErrInvalidEvaluationExpression) {
+		if options.WaitForExpression == "" {
+			// We do not expect the 'waitWindowStatus' form field to return
+			// an ErrInvalidEvaluationExpression error. In such a scenario,
+			// we return a 500.
+			return err
+		}
+
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusBadRequest,
+				fmt.Sprintf("The expression '%s' (waitForExpression) returned an exception or undefined", options.WaitForExpression),
+			),
+		)
+	}
+
+	if errors.Is(err, ErrInvalidHttpStatusCode) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Invalid HTTP status code from the main page: %s", strings.ReplaceAll(err.Error(), fmt.Sprintf(": %s", ErrInvalidHttpStatusCode.Error()), "")),
+			),
+		)
+	}
+
+	if errors.Is(err, ErrInvalidResourceHttpStatusCode) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Invalid HTTP status code from resources:\n%s", strings.ReplaceAll(err.Error(), fmt.Sprintf(": %s", ErrInvalidResourceHttpStatusCode.Error()), "")),
+			),
+		)
+	}
+
+	if errors.Is(err, ErrConsoleExceptions) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Chromium console exceptions:\n%s", strings.ReplaceAll(err.Error(), ErrConsoleExceptions.Error(), "")),
+			),
+		)
+	}
+
+	if errors.Is(err, ErrLoadingFailed) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusBadRequest,
+				fmt.Sprintf("Chromium returned %v", err),
+			),
+		)
+	}
+
+	if errors.Is(err, ErrResourceLoadingFailed) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Chromium failed to load resources: %v", strings.ReplaceAll(err.Error(), fmt.Sprintf(": %s", ErrResourceLoadingFailed.Error()), "")),
+			),
+		)
+	}
+
+	return err
+}

pkg/modules/chromium/tasks.go

@@ -3,6 +3,7 @@ package chromium
 import (
 	"bufio"
 	"context"
+	"errors"
 	"fmt"
 	"os"
 	"time"
@@ -15,24 +16,45 @@ import (
 	"go.uber.org/zap"
 )
 
-func printToPdfActionFunc(logger *zap.Logger, outputPath string, options Options) chromedp.ActionFunc {
+func printToPdfActionFunc(logger *zap.Logger, outputPath string, options PdfOptions) chromedp.ActionFunc {
 	return func(ctx context.Context) error {
+		paperHeight := options.PaperHeight
+		pageRanges := options.PageRanges
+
+		if options.SinglePage {
+			logger.Debug("single page PDF")
+
+			_, _, _, _, _, cssContentSize, err := page.GetLayoutMetrics().Do(ctx)
+			if err != nil {
+				return fmt.Errorf("get layout metrics: %w", err)
+			}
+
+			// There are 96 CSS pixels per inch.
+			// See https://issues.chromium.org/issues/40267771#comment14.
+			paperHeight = cssContentSize.Height / 96
+			pageRanges = "1" // little dirty hack to avoid leftovers.
+		}
+
 		printToPdf := page.PrintToPDF().
 			WithTransferMode(page.PrintToPDFTransferModeReturnAsStream).
 			WithLandscape(options.Landscape).
 			WithPrintBackground(options.PrintBackground).
 			WithScale(options.Scale).
 			WithPaperWidth(options.PaperWidth).
-			WithPaperHeight(options.PaperHeight).
+			WithPaperHeight(paperHeight).
 			WithMarginTop(options.MarginTop).
 			WithMarginBottom(options.MarginBottom).
 			WithMarginLeft(options.MarginLeft).
 			WithMarginRight(options.MarginRight).
-			WithPageRanges(options.PageRanges).
-			WithPreferCSSPageSize(options.PreferCssPageSize)
+			WithPageRanges(pageRanges).
+			WithPreferCSSPageSize(options.PreferCssPageSize).
+			WithGenerateDocumentOutline(options.GenerateDocumentOutline).
+			// Does not seem to work.
+			// See https://github.com/gotenberg/gotenberg/issues/831.
+			WithGenerateTaggedPDF(false)
 
-		hasCustomHeaderFooter := options.HeaderTemplate != DefaultOptions().HeaderTemplate ||
-			options.FooterTemplate != DefaultOptions().FooterTemplate
+		hasCustomHeaderFooter := options.HeaderTemplate != DefaultPdfOptions().HeaderTemplate ||
+			options.FooterTemplate != DefaultPdfOptions().FooterTemplate
 
 		if !hasCustomHeaderFooter {
 			logger.Debug("no custom header nor footer")
@@ -47,11 +69,11 @@ func printToPdfActionFunc(logger *zap.Logger, outputPath string, options Options
 				WithFooterTemplate(options.FooterTemplate)
 		}
 
-		logger.Debug(fmt.Sprintf("print to Pdf with: %+v", printToPdf))
+		logger.Debug(fmt.Sprintf("print to PDF with: %+v", printToPdf))
 
 		_, stream, err := printToPdf.Do(ctx)
 		if err != nil {
-			return fmt.Errorf("print to Pdf: %w", err)
+			return fmt.Errorf("print to PDF: %w", err)
 		}
 
 		reader := &streamReader{
@@ -63,7 +85,7 @@ func printToPdfActionFunc(logger *zap.Logger, outputPath string, options Options
 		}
 
 		defer func() {
-			err := reader.Close()
+			err = reader.Close()
 			if err != nil {
 				logger.Error(fmt.Sprintf("close reader: %s", err))
 			}
@@ -75,7 +97,7 @@ func printToPdfActionFunc(logger *zap.Logger, outputPath string, options Options
 		}
 
 		defer func() {
-			err := file.Close()
+			err = file.Close()
 			if err != nil {
 				logger.Error(fmt.Sprintf("close output path: %s", err))
 			}
@@ -92,12 +114,111 @@ func printToPdfActionFunc(logger *zap.Logger, outputPath string, options Options
 	}
 }
 
+func captureScreenshotActionFunc(logger *zap.Logger, outputPath string, options ScreenshotOptions) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		captureScreenshot := page.CaptureScreenshot().
+			WithCaptureBeyondViewport(true).
+			WithFromSurface(true).
+			WithOptimizeForSpeed(options.OptimizeForSpeed).
+			WithFormat(page.CaptureScreenshotFormat(options.Format))
+
+		if options.Clip {
+			captureScreenshot = captureScreenshot.WithClip(&page.Viewport{
+				Width:  float64(options.Width),
+				Height: float64(options.Height),
+				Scale:  1,
+			})
+		}
+
+		if options.Format == "jpeg" {
+			captureScreenshot = captureScreenshot.
+				WithQuality(int64(options.Quality))
+		}
+
+		logger.Debug(fmt.Sprintf("capture screenshot with: %+v", captureScreenshot))
+
+		buffer, err := captureScreenshot.Do(ctx)
+		if err != nil {
+			return fmt.Errorf("capture screenshot: %w", err)
+		}
+
+		file, err := os.OpenFile(outputPath, os.O_CREATE|os.O_WRONLY, 0o600)
+		if err != nil {
+			return fmt.Errorf("open output path: %w", err)
+		}
+
+		defer func() {
+			err = file.Close()
+			if err != nil {
+				logger.Error(fmt.Sprintf("close output path: %s", err))
+			}
+		}()
+
+		_, err = file.Write(buffer)
+		if err != nil {
+			return fmt.Errorf("write result to output path: %w", err)
+		}
+
+		return nil
+	}
+}
+
+func setDeviceMetricsOverride(logger *zap.Logger, width, height int) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		logger.Debug("set device metrics override")
+
+		err := emulation.SetDeviceMetricsOverride(int64(width), int64(height), 1.0, false).Do(ctx)
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("set device metrics override: %w", err)
+	}
+}
+
+func clearCacheActionFunc(logger *zap.Logger, clear bool) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		// See https://github.com/gotenberg/gotenberg/issues/753.
+		if !clear {
+			logger.Debug("cache not cleared")
+			return nil
+		}
+
+		logger.Debug("clear cache")
+
+		err := network.ClearBrowserCache().Do(ctx)
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("clear cache: %w", err)
+	}
+}
+
+func clearCookiesActionFunc(logger *zap.Logger, clear bool) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		// See https://github.com/gotenberg/gotenberg/issues/753.
+		if !clear {
+			logger.Debug("cookies not cleared")
+			return nil
+		}
+
+		logger.Debug("clear cookies")
+
+		err := network.ClearBrowserCookies().Do(ctx)
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("clear cookies: %w", err)
+	}
+}
+
 func disableJavaScriptActionFunc(logger *zap.Logger, disable bool) chromedp.ActionFunc {
 	return func(ctx context.Context) error {
 		// See https://github.com/gotenberg/gotenberg/issues/175.
 		if !disable {
 			logger.Debug("JavaScript not disabled")
-
 			return nil
 		}
 
@@ -112,31 +233,101 @@ func disableJavaScriptActionFunc(logger *zap.Logger, disable bool) chromedp.Acti
 	}
 }
 
-func extraHttpHeadersActionFunc(logger *zap.Logger, extraHttpHeaders map[string]string) chromedp.ActionFunc {
+func setCookiesActionFunc(logger *zap.Logger, cookies []Cookie) chromedp.ActionFunc {
 	return func(ctx context.Context) error {
-		if len(extraHttpHeaders) == 0 {
-			logger.Debug("no extra HTTP headers")
-
+		if len(cookies) == 0 {
+			logger.Debug("no cookies to set")
 			return nil
 		}
 
-		logger.Debug(fmt.Sprintf("extra HTTP headers: %+v", extraHttpHeaders))
+		deadline, ok := ctx.Deadline()
+		if !ok {
+			return errors.New("context has no deadline, cannot set cookies")
+		}
+		epochTime := cdp.TimeSinceEpoch(deadline)
 
-		headers := make(network.Headers, len(extraHttpHeaders))
-		for key, value := range extraHttpHeaders {
-			headers[key] = value
+		cookiePretty := func(c *network.SetCookieParams) string {
+			return fmt.Sprintf(
+				"Name: '%s', Value: '%s', Domain: '%s', Path: '%s', Secure: %t, HTTPOnly: %t, SameSite: '%s', Expires: %s",
+				c.Name,
+				c.Value,
+				c.Domain,
+				c.Path,
+				c.Secure,
+				c.HTTPOnly,
+				c.SameSite.String(),
+				c.Expires.Time().String(),
+			)
 		}
 
-		err := network.SetExtraHTTPHeaders(headers).Do(ctx)
+		for _, cookie := range cookies {
+			cookieParams := network.
+				SetCookie(cookie.Name, cookie.Value).
+				WithDomain(cookie.Domain).
+				WithPath(cookie.Path).
+				WithSecure(cookie.Secure).
+				WithHTTPOnly(cookie.HttpOnly).
+				WithSameSite(cookie.SameSite).
+				WithExpires(&epochTime)
+
+			err := cookieParams.Do(ctx)
+			if err != nil {
+				return fmt.Errorf("set cookie %s: %w", cookiePretty(cookieParams), err)
+			}
+
+			logger.Debug(fmt.Sprintf("set cookie %s", cookiePretty(cookieParams)))
+		}
+
+		return nil
+	}
+}
+
+func userAgentOverride(logger *zap.Logger, userAgent string) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		if len(userAgent) == 0 {
+			logger.Debug("no user agent override")
+			return nil
+		}
+
+		logger.Debug(fmt.Sprintf("user agent override: %s", userAgent))
+		err := emulation.SetUserAgentOverride(userAgent).Do(ctx)
 		if err == nil {
 			return nil
 		}
 
-		return fmt.Errorf("set extra HTTP headers: %w", err)
+		return fmt.Errorf("set user agent override: %w", err)
 	}
 }
 
-func navigateActionFunc(logger *zap.Logger, url string) chromedp.ActionFunc {
+// This code has been replaced with the listenForEventRequestPaused function.
+// Indeed, the user may want to scope the headers per domain, but using
+// network.SetExtraHTTPHeaders set the headers for ALL requests from the page.
+// See https://github.com/gotenberg/gotenberg/issues/1011.
+//
+//func extraHttpHeadersActionFunc(logger *zap.Logger, extraHttpHeaders map[string]string) chromedp.ActionFunc {
+//	return func(ctx context.Context) error {
+//		if len(extraHttpHeaders) == 0 {
+//			logger.Debug("no extra HTTP headers")
+//			return nil
+//		}
+//
+//		logger.Debug(fmt.Sprintf("extra HTTP headers: %+v", extraHttpHeaders))
+//
+//		headers := make(network.Headers, len(extraHttpHeaders))
+//		for key, value := range extraHttpHeaders {
+//			headers[key] = value
+//		}
+//
+//		err := network.SetExtraHTTPHeaders(headers).Do(ctx)
+//		if err == nil {
+//			return nil
+//		}
+//
+//		return fmt.Errorf("set extra HTTP headers: %w", err)
+//	}
+//}
+
+func navigateActionFunc(logger *zap.Logger, url string, skipNetworkIdleEvent bool) chromedp.ActionFunc {
 	return func(ctx context.Context) error {
 		logger.Debug(fmt.Sprintf("navigate to '%s'", url))
 
@@ -145,12 +336,21 @@ func navigateActionFunc(logger *zap.Logger, url string) chromedp.ActionFunc {
 			return fmt.Errorf("navigate to '%s': %w", url, err)
 		}
 
-		err = runBatch(
-			ctx,
+		waitFunc := []func() error{
 			waitForEventDomContentEventFired(ctx, logger),
 			waitForEventLoadEventFired(ctx, logger),
-			waitForEventNetworkIdle(ctx, logger),
 			waitForEventLoadingFinished(ctx, logger),
+		}
+
+		if !skipNetworkIdleEvent {
+			waitFunc = append(waitFunc, waitForEventNetworkIdle(ctx, logger))
+		} else {
+			logger.Debug("skipping network idle event")
+		}
+
+		err = runBatch(
+			ctx,
+			waitFunc...,
 		)
 
 		if err == nil {
@@ -166,7 +366,6 @@ func hideDefaultWhiteBackgroundActionFunc(logger *zap.Logger, omitBackground, pr
 		// See https://github.com/gotenberg/gotenberg/issues/226.
 		if !omitBackground {
 			logger.Debug("default white background not hidden")
-
 			return nil
 		}
 
@@ -225,7 +424,6 @@ func emulateMediaTypeActionFunc(logger *zap.Logger, mediaType string) chromedp.A
 	return func(ctx context.Context) error {
 		if mediaType == "" {
 			logger.Debug("no emulated media type")
-
 			return nil
 		}
 
@@ -249,13 +447,11 @@ func waitDelayBeforePrintActionFunc(logger *zap.Logger, disableJavaScript bool,
 	return func(ctx context.Context) error {
 		if disableJavaScript {
 			logger.Debug("JavaScript disabled, skipping wait delay")
-
 			return nil
 		}
 
 		if delay <= 0 {
 			logger.Debug("no wait delay")
-
 			return nil
 		}
 
@@ -276,13 +472,11 @@ func waitForExpressionBeforePrintActionFunc(logger *zap.Logger, disableJavaScrip
 	return func(ctx context.Context) error {
 		if disableJavaScript {
 			logger.Debug("JavaScript disabled, skipping wait expression")
-
 			return nil
 		}
 
 		if expression == "" {
 			logger.Debug("no wait expression")
-
 			return nil
 		}
 
@@ -295,12 +489,11 @@ func waitForExpressionBeforePrintActionFunc(logger *zap.Logger, disableJavaScrip
 			select {
 			case <-ctx.Done():
 				ticker.Stop()
-
 				return fmt.Errorf("context done while evaluating '%s': %w", expression, ctx.Err())
 			case <-ticker.C:
 				var ok bool
-
 				evaluate := chromedp.Evaluate(expression, &ok)
+
 				err := evaluate.Do(ctx)
 				if err != nil {
 					return fmt.Errorf("evaluate: %v: %w", err, ErrInvalidEvaluationExpression)
@@ -308,7 +501,6 @@ func waitForExpressionBeforePrintActionFunc(logger *zap.Logger, disableJavaScrip
 
 				if ok {
 					ticker.Stop()
-
 					return nil
 				}
 

pkg/modules/exiftool/doc.go

@@ -0,0 +1,11 @@
+// Package exiftool provides an implementation of the gotenberg.PdfEngine
+// interface using the ExifTool command-line tool. This package allows for:
+//
+// 1. The reading of metadata.
+// 2. The writing of metadata.
+//
+// The path to the exiftool binary must be specified using the
+// EXIFTOOL_BIN_PATH environment variable.
+//
+// See: https://exiftool.org.
+package exiftool

pkg/modules/exiftool/exiftool.go

@@ -0,0 +1,165 @@
+package exiftool
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"reflect"
+
+	"github.com/barasher/go-exiftool"
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+func init() {
+	gotenberg.MustRegisterModule(new(ExifTool))
+}
+
+// ExifTool abstracts the CLI tool ExifTool and implements the
+// [gotenberg.PdfEngine] interface.
+type ExifTool struct {
+	binPath string
+}
+
+// Descriptor returns [ExifTool]'s module descriptor.
+func (engine *ExifTool) Descriptor() gotenberg.ModuleDescriptor {
+	return gotenberg.ModuleDescriptor{
+		ID:  "exiftool",
+		New: func() gotenberg.Module { return new(ExifTool) },
+	}
+}
+
+// Provision sets the module properties.
+func (engine *ExifTool) Provision(ctx *gotenberg.Context) error {
+	binPath, ok := os.LookupEnv("EXIFTOOL_BIN_PATH")
+	if !ok {
+		return errors.New("EXIFTOOL_BIN_PATH environment variable is not set")
+	}
+
+	engine.binPath = binPath
+
+	return nil
+}
+
+// Validate validates the module properties.
+func (engine *ExifTool) Validate() error {
+	_, err := os.Stat(engine.binPath)
+	if os.IsNotExist(err) {
+		return fmt.Errorf("ExifTool binary path does not exist: %w", err)
+	}
+
+	return nil
+}
+
+// Merge is not available in this implementation.
+func (engine *ExifTool) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+	return fmt.Errorf("merge PDFs with ExifTool: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// Split is not available in this implementation.
+func (engine *ExifTool) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	return nil, fmt.Errorf("split PDF with ExifTool: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// Flatten is not available in this implementation.
+func (engine *ExifTool) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	return fmt.Errorf("flatten PDF with ExifTool: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// Convert is not available in this implementation.
+func (engine *ExifTool) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+	return fmt.Errorf("convert PDF to '%+v' with ExifTool: %w", formats, gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// ReadMetadata extracts the metadata of a given PDF file.
+func (engine *ExifTool) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	exifTool, err := exiftool.NewExiftool(exiftool.SetExiftoolBinaryPath(engine.binPath))
+	if err != nil {
+		return nil, fmt.Errorf("new ExifTool: %w", err)
+	}
+
+	defer func(exifTool *exiftool.Exiftool) {
+		err := exifTool.Close()
+		if err != nil {
+			logger.Error(fmt.Sprintf("close ExifTool: %v", err))
+		}
+	}(exifTool)
+
+	fileMetadata := exifTool.ExtractMetadata(inputPath)
+	if fileMetadata[0].Err != nil {
+		return nil, fmt.Errorf("read metadata with ExitfTool: %w", fileMetadata[0].Err)
+	}
+
+	return fileMetadata[0].Fields, nil
+}
+
+// WriteMetadata writes the metadata into a given PDF file.
+func (engine *ExifTool) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	exifTool, err := exiftool.NewExiftool(exiftool.SetExiftoolBinaryPath(engine.binPath))
+	if err != nil {
+		return fmt.Errorf("new ExifTool: %w", err)
+	}
+
+	defer func(exifTool *exiftool.Exiftool) {
+		err := exifTool.Close()
+		if err != nil {
+			logger.Error(fmt.Sprintf("close ExifTool: %v", err))
+		}
+	}(exifTool)
+
+	fileMetadata := exifTool.ExtractMetadata(inputPath)
+	if fileMetadata[0].Err != nil {
+		return fmt.Errorf("read metadata with ExitfTool: %w", fileMetadata[0].Err)
+	}
+
+	for key, value := range metadata {
+		switch val := value.(type) {
+		case string:
+			fileMetadata[0].SetString(key, val)
+		case []string:
+			fileMetadata[0].SetStrings(key, val)
+		case []interface{}:
+			// See https://github.com/gotenberg/gotenberg/issues/1048.
+			strings := make([]string, len(val))
+			for i, entry := range val {
+				if str, ok := entry.(string); ok {
+					strings[i] = str
+					continue
+				}
+				return fmt.Errorf("write PDF metadata with ExifTool: %s %+v %s %w", key, val, reflect.TypeOf(val), gotenberg.ErrPdfEngineMetadataValueNotSupported)
+			}
+			fileMetadata[0].SetStrings(key, strings)
+		case bool:
+			fileMetadata[0].SetString(key, fmt.Sprintf("%t", val))
+		case int:
+			fileMetadata[0].SetInt(key, int64(val))
+		case int64:
+			fileMetadata[0].SetInt(key, val)
+		case float32:
+			fileMetadata[0].SetFloat(key, float64(val))
+		case float64:
+			fileMetadata[0].SetFloat(key, val)
+		// TODO: support more complex cases, e.g., arrays and nested objects
+		// 	(limitations in underlying library).
+		default:
+			return fmt.Errorf("write PDF metadata with ExifTool: %s %+v %s %w", key, val, reflect.TypeOf(val), gotenberg.ErrPdfEngineMetadataValueNotSupported)
+		}
+	}
+
+	exifTool.WriteMetadata(fileMetadata)
+	if fileMetadata[0].Err != nil {
+		return fmt.Errorf("write PDF metadata with ExifTool: %w", fileMetadata[0].Err)
+	}
+
+	return nil
+}
+
+// Interface guards.
+var (
+	_ gotenberg.Module      = (*ExifTool)(nil)
+	_ gotenberg.Provisioner = (*ExifTool)(nil)
+	_ gotenberg.Validator   = (*ExifTool)(nil)
+	_ gotenberg.PdfEngine   = (*ExifTool)(nil)
+)

pkg/modules/exiftool/exiftool_test.go

@@ -0,0 +1,371 @@
+package exiftool
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+func TestExifTool_Descriptor(t *testing.T) {
+	descriptor := new(ExifTool).Descriptor()
+
+	actual := reflect.TypeOf(descriptor.New())
+	expect := reflect.TypeOf(new(ExifTool))
+
+	if actual != expect {
+		t.Errorf("expected '%s' but got '%s'", expect, actual)
+	}
+}
+
+func TestExifTool_Provision(t *testing.T) {
+	engine := new(ExifTool)
+	ctx := gotenberg.NewContext(gotenberg.ParsedFlags{}, nil)
+
+	err := engine.Provision(ctx)
+	if err != nil {
+		t.Errorf("expected no error but got: %v", err)
+	}
+}
+
+func TestExifTool_Validate(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		binPath     string
+		expectError bool
+	}{
+		{
+			scenario:    "empty bin path",
+			binPath:     "",
+			expectError: true,
+		},
+		{
+			scenario:    "bin path does not exist",
+			binPath:     "/foo",
+			expectError: true,
+		},
+		{
+			scenario:    "validate success",
+			binPath:     os.Getenv("EXIFTOOL_BIN_PATH"),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(ExifTool)
+			engine.binPath = tc.binPath
+			err := engine.Validate()
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
+func TestExiftool_Merge(t *testing.T) {
+	engine := new(ExifTool)
+	err := engine.Merge(context.Background(), zap.NewNop(), nil, "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestExiftool_Split(t *testing.T) {
+	engine := new(ExifTool)
+	_, err := engine.Split(context.Background(), zap.NewNop(), gotenberg.SplitMode{}, "", "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestExiftool_Flatten(t *testing.T) {
+	engine := new(ExifTool)
+	err := engine.Flatten(context.Background(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestExiftool_Convert(t *testing.T) {
+	engine := new(ExifTool)
+	err := engine.Convert(context.Background(), zap.NewNop(), gotenberg.PdfFormats{}, "", "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestExiftool_ReadMetadata(t *testing.T) {
+	for _, tc := range []struct {
+		scenario       string
+		inputPath      string
+		expectMetadata map[string]interface{}
+		expectError    bool
+	}{
+		{
+			scenario:       "invalid input path",
+			inputPath:      "foo",
+			expectMetadata: nil,
+			expectError:    true,
+		},
+		{
+			scenario:  "success",
+			inputPath: "/tests/test/testdata/pdfengines/sample1.pdf",
+			expectMetadata: map[string]interface{}{
+				"FileName":          "sample1.pdf",
+				"FileTypeExtension": "pdf",
+				"MIMEType":          "application/pdf",
+				"PDFVersion":        1.4,
+				"PageCount":         float64(3),
+			},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(ExifTool)
+			err := engine.Provision(nil)
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			metadata, err := engine.ReadMetadata(context.Background(), zap.NewNop(), tc.inputPath)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectMetadata != nil && err == nil {
+				for k, v := range tc.expectMetadata {
+					if v2, ok := metadata[k]; !ok || v != v2 {
+						t.Errorf("expected entry %s with value %v to exists", k, v)
+					}
+				}
+			}
+		})
+	}
+}
+
+func TestExiftool_WriteMetadata(t *testing.T) {
+	for _, tc := range []struct {
+		scenario       string
+		createCopy     bool
+		inputPath      string
+		metadata       map[string]interface{}
+		expectMetadata map[string]interface{}
+		expectError    bool
+		expectedError  error
+	}{
+		{
+			scenario:    "invalid input path",
+			createCopy:  false,
+			inputPath:   "foo",
+			expectError: true,
+		},
+		{
+			scenario:   "gotenberg.ErrPdfEngineMetadataValueNotSupported (not string array)",
+			createCopy: true,
+			inputPath:  "/tests/test/testdata/pdfengines/sample1.pdf",
+			metadata: map[string]interface{}{
+				"Unsupported": []interface{}{
+					"foo",
+					1,
+				},
+			},
+			expectError:   true,
+			expectedError: gotenberg.ErrPdfEngineMetadataValueNotSupported,
+		},
+		{
+			scenario:   "gotenberg.ErrPdfEngineMetadataValueNotSupported (default)",
+			createCopy: true,
+			inputPath:  "/tests/test/testdata/pdfengines/sample1.pdf",
+			metadata: map[string]interface{}{
+				"Unsupported": map[string]interface{}{},
+			},
+			expectError:   true,
+			expectedError: gotenberg.ErrPdfEngineMetadataValueNotSupported,
+		},
+		{
+			scenario:   "success (interface array to string array)",
+			createCopy: true,
+			inputPath:  "/tests/test/testdata/pdfengines/sample1.pdf",
+			metadata: map[string]interface{}{
+				"Keywords": []interface{}{
+					"first",
+					"second",
+				},
+			},
+			expectMetadata: map[string]interface{}{
+				"Keywords": []interface{}{
+					"first",
+					"second",
+				},
+			},
+			expectError: false,
+		},
+		{
+			scenario:   "success",
+			createCopy: true,
+			inputPath:  "/tests/test/testdata/pdfengines/sample1.pdf",
+			metadata: map[string]interface{}{
+				"Author":       "Julien Neuhart",
+				"Copyright":    "Julien Neuhart",
+				"CreationDate": "2006-09-18T16:27:50-04:00",
+				"Creator":      "Gotenberg",
+				"Keywords": []string{
+					"first",
+					"second",
+				},
+				"Marked":     true,
+				"ModDate":    "2006-09-18T16:27:50-04:00",
+				"PDFVersion": 1.7,
+				"Producer":   "Gotenberg",
+				"Subject":    "Sample",
+				"Title":      "Sample",
+				"Trapped":    "Unknown",
+				// Those are not valid PDF metadata.
+				"int":     1,
+				"int64":   int64(2),
+				"float32": float32(2.2),
+				"float64": 3.3,
+			},
+			expectMetadata: map[string]interface{}{
+				"Author":       "Julien Neuhart",
+				"Copyright":    "Julien Neuhart",
+				"CreationDate": "2006:09:18 16:27:50-04:00",
+				"Creator":      "Gotenberg",
+				"Keywords": []interface{}{
+					"first",
+					"second",
+				},
+				"Marked":     true,
+				"ModDate":    "2006:09:18 16:27:50-04:00",
+				"PDFVersion": 1.7,
+				"Producer":   "Gotenberg",
+				"Subject":    "Sample",
+				"Title":      "Sample",
+				"Trapped":    "Unknown",
+			},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(ExifTool)
+			err := engine.Provision(nil)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			var destinationPath string
+			if tc.createCopy {
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+				outputDir, err := fs.MkdirAll()
+				if err != nil {
+					t.Fatalf("expected error no but got: %v", err)
+				}
+
+				defer func() {
+					err = os.RemoveAll(fs.WorkingDirPath())
+					if err != nil {
+						t.Fatalf("expected no error while cleaning up but got: %v", err)
+					}
+				}()
+
+				destinationPath = fmt.Sprintf("%s/copy_temp.pdf", outputDir)
+				source, err := os.Open(tc.inputPath)
+				if err != nil {
+					t.Fatalf("open source file: %v", err)
+				}
+
+				defer func(source *os.File) {
+					err := source.Close()
+					if err != nil {
+						t.Fatalf("close file: %v", err)
+					}
+				}(source)
+
+				destination, err := os.Create(destinationPath)
+				if err != nil {
+					t.Fatalf("create destination file: %v", err)
+				}
+
+				defer func(destination *os.File) {
+					err := destination.Close()
+					if err != nil {
+						t.Fatalf("close file: %v", err)
+					}
+				}(destination)
+
+				_, err = io.Copy(destination, source)
+				if err != nil {
+					t.Fatalf("copy source into destination: %v", err)
+				}
+			} else {
+				destinationPath = tc.inputPath
+			}
+
+			err = engine.WriteMetadata(context.Background(), zap.NewNop(), tc.metadata, destinationPath)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectedError != nil && !errors.Is(err, tc.expectedError) {
+				t.Fatalf("expected error %v but got: %v", tc.expectedError, err)
+			}
+
+			if tc.expectError {
+				return
+			}
+
+			metadata, err := engine.ReadMetadata(context.Background(), zap.NewNop(), destinationPath)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectMetadata != nil && err == nil {
+				for k, v := range tc.expectMetadata {
+					v2, ok := metadata[k]
+					if !ok {
+						t.Errorf("expected entry %s with value %v to exists, but got none", k, v)
+						continue
+					}
+
+					switch v2.(type) {
+					case []interface{}:
+						for i, entry := range v.([]interface{}) {
+							if entry != v2.([]interface{})[i] {
+								t.Errorf("expected entry %s to contain value %v, but got %v", k, entry, v2.([]interface{})[i])
+							}
+						}
+					default:
+						if v != v2 {
+							t.Errorf("expected entry %s with value %v to exists, but got %v", k, v, v2)
+						}
+					}
+				}
+			}
+		})
+	}
+}

pkg/modules/libreoffice/api/api.go

@@ -12,8 +12,8 @@ import (
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
 )
 
 func init() {
@@ -21,13 +21,20 @@ func init() {
 }
 
 var (
-	// ErrInvalidPdfFormat happens if the PDF format option cannot be handled
+	// ErrInvalidPdfFormats happens if the PDF formats option cannot be handled
 	// by LibreOffice.
-	ErrInvalidPdfFormat = errors.New("invalid PDF format")
+	ErrInvalidPdfFormats = errors.New("invalid PDF formats")
 
-	// ErrMalformedPageRanges happens if the page ranges option cannot be
-	// interpreted by LibreOffice.
-	ErrMalformedPageRanges = errors.New("page ranges are malformed")
+	// ErrUnoException happens when unoconverter returns an exit code 5.
+	ErrUnoException = errors.New("uno exception")
+
+	// ErrRuntimeException happens when unoconverter returns an exit code 6.
+	ErrRuntimeException = errors.New("uno exception")
+
+	// ErrCoreDumped happens randomly; sometime a conversion will work as
+	// expected, and some other time the same conversion will fail.
+	// See https://github.com/gotenberg/gotenberg/issues/639.
+	ErrCoreDumped = errors.New("core dumped")
 )
 
 // Api is a module which provides a [Uno] to interact with LibreOffice.
@@ -41,22 +48,133 @@ type Api struct {
 }
 
 // Options gathers available options when converting a document to PDF.
+// See: https://help.libreoffice.org/latest/en-US/text/shared/guide/pdf_params.html.
 type Options struct {
+	// Password specifies the password for opening the source file.
+	Password string
+
 	// Landscape allows to change the orientation of the resulting PDF.
-	// Optional.
 	Landscape bool
 
 	// PageRanges allows to select the pages to convert.
-	// TODO: should prefer a method form PdfEngine.
-	// Optional.
 	PageRanges string
 
-	// PdfFormats allows to convert the resulting PDF to PDF/A-1a, PDF/A-2b,
+	// ExportFormFields specifies whether form fields are exported as widgets
+	// or only their fixed print representation is exported.
+	ExportFormFields bool
+
+	// AllowDuplicateFieldNames specifies whether multiple form fields exported
+	// are allowed to have the same field name.
+	AllowDuplicateFieldNames bool
+
+	// ExportBookmarks specifies if bookmarks are exported to PDF.
+	ExportBookmarks bool
+
+	// ExportBookmarksToPdfDestination specifies that the bookmarks contained
+	// in the source LibreOffice file should be exported to the PDF file as
+	// Named Destination.
+	ExportBookmarksToPdfDestination bool
+
+	// ExportPlaceholders exports the placeholders fields visual markings only.
+	// The exported placeholder is ineffective.
+	ExportPlaceholders bool
+
+	// ExportNotes specifies if notes are exported to PDF.
+	ExportNotes bool
+
+	// ExportNotesPages specifies if notes pages are exported to PDF.
+	// Notes pages are available in Impress documents only.
+	ExportNotesPages bool
+
+	// ExportOnlyNotesPages specifies, if the property ExportNotesPages is set
+	// to true, if only notes pages are exported to PDF.
+	ExportOnlyNotesPages bool
+
+	// ExportNotesInMargin specifies if notes in margin are exported to PDF.
+	ExportNotesInMargin bool
+
+	// ConvertOooTargetToPdfTarget specifies that the target documents with
+	// .od[tpgs] extension, will have that extension changed to .pdf when the
+	// link is exported to PDF. The source document remains untouched.
+	ConvertOooTargetToPdfTarget bool
+
+	// ExportLinksRelativeFsys specifies that the file system related
+	// hyperlinks (file:// protocol) present in the document will be exported
+	// as relative to the source document location.
+	ExportLinksRelativeFsys bool
+
+	// ExportHiddenSlides exports, for LibreOffice Impress, slides that are not
+	// included in slide shows.
+	ExportHiddenSlides bool
+
+	// SkipEmptyPages specifies that automatically inserted empty pages are
+	// suppressed. This option is active only if storing Writer documents.
+	SkipEmptyPages bool
+
+	// AddOriginalDocumentAsStream specifies that a stream is inserted to the
+	// PDF file which contains the original document for archiving purposes.
+	AddOriginalDocumentAsStream bool
+
+	// SinglePageSheets ignores each sheet’s paper size, print ranges and
+	// shown/hidden status and puts every sheet (even hidden sheets) on exactly
+	// one page.
+	SinglePageSheets bool
+
+	// LosslessImageCompression specifies if images are exported to PDF using
+	// a lossless compression format like PNG or compressed using the JPEG
+	// format.
+	LosslessImageCompression bool
+
+	// Quality specifies the quality of the JPG export. A higher value produces
+	// a higher-quality image and a larger file. Between 1 and 100.
+	Quality int
+
+	// ReduceImageResolution specifies if the resolution of each image is
+	// reduced to the resolution specified by the property MaxImageResolution.
+	ReduceImageResolution bool
+
+	// MaxImageResolution, if the property ReduceImageResolution is set to
+	// true, tells if all images will be reduced to the given value in DPI.
+	// Possible values are: 75, 150, 300, 600 and 1200.
+	MaxImageResolution int
+
+	// PdfFormats allows to convert the resulting PDF to PDF/A-1b, PDF/A-2b,
 	// PDF/A-3b and PDF/UA.
-	// Optional.
 	PdfFormats gotenberg.PdfFormats
 }
 
+// DefaultOptions returns the default values for Options.
+func DefaultOptions() Options {
+	return Options{
+		Password:                        "",
+		Landscape:                       false,
+		PageRanges:                      "",
+		ExportFormFields:                true,
+		AllowDuplicateFieldNames:        false,
+		ExportBookmarks:                 true,
+		ExportBookmarksToPdfDestination: false,
+		ExportPlaceholders:              false,
+		ExportNotes:                     false,
+		ExportNotesPages:                false,
+		ExportOnlyNotesPages:            false,
+		ExportNotesInMargin:             false,
+		ConvertOooTargetToPdfTarget:     false,
+		ExportLinksRelativeFsys:         false,
+		ExportHiddenSlides:              false,
+		SkipEmptyPages:                  false,
+		AddOriginalDocumentAsStream:     false,
+		SinglePageSheets:                false,
+		LosslessImageCompression:        false,
+		Quality:                         90,
+		ReduceImageResolution:           false,
+		MaxImageResolution:              300,
+		PdfFormats: gotenberg.PdfFormats{
+			PdfA:  "",
+			PdfUa: false,
+		},
+	}
+}
+
 // Uno is an abstraction on top of the Universal Network Objects API.
 type Uno interface {
 	Pdf(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error
@@ -80,24 +198,10 @@ func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 		ID: "libreoffice-api",
 		FlagSet: func() *flag.FlagSet {
 			fs := flag.NewFlagSet("api", flag.ExitOnError)
-
-			// Deprecated flags.
-			fs.Duration("uno-listener-start-timeout", time.Duration(10)*time.Second, "Time limit for restarting the LibreOffice")
-			fs.Int64("uno-listener-restart-threshold", 10, "Conversions limit after which the LibreOffice listener is restarted - 0 means no restart")
-			fs.Bool("unoconv-disable-listener", false, "Do not start a long-running listener - save resources in detriment of unitary performance")
-
-			var err error
-			err = multierr.Append(err, fs.MarkDeprecated("uno-listener-start-timeout", "use the libreOffice-start-timeout property instead"))
-			err = multierr.Append(err, fs.MarkDeprecated("uno-listener-restart-threshold", "use the libreOffice-restart-after property instead"))
-			err = multierr.Append(err, fs.MarkDeprecated("unoconv-disable-listener", "use the libreOffice-auto-start property instead"))
-
-			if err != nil {
-				panic(fmt.Errorf("create deprecated flags for the LibreOffice module: %v", err))
-			}
-
 			fs.Int64("libreoffice-restart-after", 10, "Number of conversions after which LibreOffice will automatically restart. Set to 0 to disable this feature")
+			fs.Int64("libreoffice-max-queue-size", 0, "Maximum request queue size for LibreOffice. Set to 0 to disable this feature")
 			fs.Bool("libreoffice-auto-start", false, "Automatically launch LibreOffice upon initialization if set to true; otherwise, LibreOffice will start at the time of the first conversion")
-			fs.Duration("libreoffice-start-timeout", time.Duration(10)*time.Second, "Maximum duration to wait for LibreOffice to start or restart")
+			fs.Duration("libreoffice-start-timeout", time.Duration(20)*time.Second, "Maximum duration to wait for LibreOffice to start or restart")
 
 			return fs
 		}(),
@@ -123,7 +227,7 @@ func (a *Api) Provision(ctx *gotenberg.Context) error {
 	a.args = libreOfficeArguments{
 		binPath:      libreOfficeBinPath,
 		unoBinPath:   unoBinPath,
-		startTimeout: flags.MustDeprecatedDuration("uno-listener-start-timeout", "libreoffice-start-timeout"),
+		startTimeout: flags.MustDuration("libreoffice-start-timeout"),
 	}
 
 	// Logger.
@@ -139,7 +243,7 @@ func (a *Api) Provision(ctx *gotenberg.Context) error {
 
 	// Process.
 	a.libreOffice = newLibreOfficeProcess(a.args)
-	a.supervisor = gotenberg.NewProcessSupervisor(a.logger, a.libreOffice, flags.MustDeprecatedInt64("uno-listener-restart-threshold", "libreoffice-restart-after"))
+	a.supervisor = gotenberg.NewProcessSupervisor(a.logger, a.libreOffice, flags.MustInt64("libreoffice-restart-after"), flags.MustInt64("libreoffice-max-queue-size"))
 
 	return nil
 }
@@ -204,46 +308,6 @@ func (a *Api) Stop(ctx context.Context) error {
 // Metrics returns the metrics.
 func (a *Api) Metrics() ([]gotenberg.Metric, error) {
 	return []gotenberg.Metric{
-		// TODO: remove deprecated.
-		{
-			Name:        "unoconv_active_instances_count",
-			Description: "Current number of active unoconv instances - deprecated.",
-			Read: func() float64 {
-				return 1
-			},
-		},
-		// TODO: remove deprecated.
-		{
-			Name:        "libreoffice_listener_active_instances_count",
-			Description: "Current number of active LibreOffice listener instances - deprecated.",
-			Read: func() float64 {
-				return 1
-			},
-		},
-		// TODO: remove deprecated.
-		{
-			Name:        "unoconv_listener_active_instances_count",
-			Description: "Current number of active unoconv listener instances- deprecated.",
-			Read: func() float64 {
-				return 1
-			},
-		},
-		// TODO: remove deprecated.
-		{
-			Name:        "libreoffice_listener_queue_length",
-			Description: "Current number of processes in the LibreOffice listener queue - deprecated, prefer libreoffice_requests_queue_size.",
-			Read: func() float64 {
-				return float64(a.supervisor.ReqQueueSize())
-			},
-		},
-		// TODO: remove deprecated.
-		{
-			Name:        "unoconv_listener_queue_length",
-			Description: "Current number of processes in the queue - deprecated, prefer libreoffice_requests_queue_size.",
-			Read: func() float64 {
-				return float64(a.supervisor.ReqQueueSize())
-			},
-		},
 		{
 			Name:        "libreoffice_requests_queue_size",
 			Description: "Current number of LibreOffice conversion requests waiting to be treated.",
@@ -277,6 +341,34 @@ func (a *Api) Checks() ([]health.CheckerOption, error) {
 	}, nil
 }
 
+// Ready returns no error if the module is ready.
+func (a *Api) Ready() error {
+	if !a.autoStart {
+		return nil
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), a.args.startTimeout)
+	defer cancel()
+
+	ticker := time.NewTicker(time.Duration(100) * time.Millisecond)
+
+	for {
+		select {
+		case <-ctx.Done():
+			ticker.Stop()
+			return fmt.Errorf("context done while waiting for LibreOffice to be ready: %w", ctx.Err())
+		case <-ticker.C:
+			ok := a.libreOffice.Healthy(a.logger)
+			if ok {
+				ticker.Stop()
+				return nil
+			}
+
+			continue
+		}
+	}
+}
+
 // LibreOffice returns a [Uno] for interacting with LibreOffice.
 func (a *Api) LibreOffice() (Uno, error) {
 	return a, nil
@@ -284,94 +376,157 @@ func (a *Api) LibreOffice() (Uno, error) {
 
 // Pdf converts a document to PDF.
 func (a *Api) Pdf(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-	return a.supervisor.Run(ctx, logger, func() error {
+	err := a.supervisor.Run(ctx, logger, func() error {
 		return a.libreOffice.pdf(ctx, logger, inputPath, outputPath, options)
 	})
+
+	if err == nil {
+		return nil
+	}
+
+	// See https://github.com/gotenberg/gotenberg/issues/639.
+	if errors.Is(err, ErrCoreDumped) {
+		logger.Debug(fmt.Sprintf("got a '%s' error, retry conversion", err))
+		return a.Pdf(ctx, logger, inputPath, outputPath, options)
+	}
+
+	return fmt.Errorf("supervisor run task: %w", err)
 }
 
 // Extensions returns the file extensions available for conversions.
 // FIXME: don't care, take all on the route level?
 func (a *Api) Extensions() []string {
 	return []string{
+		".123",
+		".602",
+		".abw",
 		".bib",
-		".doc",
-		".xml",
-		".docx",
-		".fodt",
-		".html",
-		".ltx",
-		".txt",
-		".odt",
-		".ott",
-		".pdb",
-		".pdf",
-		".psw",
-		".rtf",
-		".sdw",
-		".stw",
-		".sxw",
-		".uot",
-		".vor",
-		".wps",
-		".epub",
-		".png",
 		".bmp",
+		".cdr",
+		".cgm",
+		".cmx",
+		".csv",
+		".cwk",
+		".dbf",
+		".dif",
+		".doc",
+		".docm",
+		".docx",
+		".dot",
+		".dotm",
+		".dotx",
+		".dxf",
 		".emf",
 		".eps",
+		".epub",
 		".fodg",
+		".fodp",
+		".fods",
+		".fodt",
+		".fopd",
 		".gif",
-		".jpg",
+		".htm",
+		".html",
+		".hwp",
 		".jpeg",
+		".jpg",
+		".key",
+		".ltx",
+		".lwp",
+		".mcw",
 		".met",
+		".mml",
+		".mw",
+		".numbers",
 		".odd",
+		".odg",
+		".odm",
+		".odp",
+		".ods",
+		".odt",
 		".otg",
+		".oth",
+		".otp",
+		".ots",
+		".ott",
+		".pages",
 		".pbm",
+		".pcd",
 		".pct",
+		".pcx",
+		".pdb",
+		".pdf",
 		".pgm",
+		".png",
+		".pot",
+		".potm",
+		".potx",
 		".ppm",
+		".pps",
+		".ppt",
+		".pptm",
+		".pptx",
+		".psd",
+		".psw",
+		".pub",
+		".pwp",
+		".pxl",
 		".ras",
+		".rtf",
+		".sda",
+		".sdc",
+		".sdd",
+		".sdp",
+		".sdw",
+		".sgl",
+		".slk",
+		".smf",
+		".stc",
 		".std",
+		".sti",
+		".stw",
 		".svg",
 		".svm",
 		".swf",
+		".sxc",
 		".sxd",
+		".sxg",
+		".sxi",
+		".sxm",
 		".sxw",
+		".tga",
 		".tif",
 		".tiff",
-		".xhtml",
-		".xpm",
-		".odp",
-		".fodp",
-		".potm",
-		".pot",
-		".pptx",
-		".pps",
-		".ppt",
-		".pwp",
-		".sda",
-		".sdd",
-		".sti",
-		".sxi",
+		".txt",
+		".uof",
 		".uop",
-		".wmf",
-		".csv",
-		".dbf",
-		".dif",
-		".fods",
-		".ods",
-		".ots",
-		".pxl",
-		".sdc",
-		".slk",
-		".stc",
-		".sxc",
 		".uos",
+		".uot",
+		".vdx",
+		".vor",
+		".vsd",
+		".vsdm",
+		".vsdx",
+		".wb2",
+		".wk1",
+		".wks",
+		".wmf",
+		".wpd",
+		".wpg",
+		".wps",
+		".xbm",
+		".xhtml",
 		".xls",
-		".xlt",
+		".xlsb",
+		".xlsm",
 		".xlsx",
-		".odg",
-		".dotx",
+		".xlt",
+		".xltm",
 		".xltx",
+		".xlw",
+		".xml",
+		".xpm",
+		".zabw",
 	}
 }
 

pkg/modules/libreoffice/api/api_test.go

@@ -11,9 +11,18 @@ import (
 	"github.com/alexliesenfeld/health"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
+func TestDefaultOptions(t *testing.T) {
+	actual := DefaultOptions()
+	notExpect := Options{}
+
+	if reflect.DeepEqual(actual, notExpect) {
+		t.Errorf("expected %v and got identical %v", actual, notExpect)
+	}
+}
+
 func TestApi_Descriptor(t *testing.T) {
 	descriptor := new(Api).Descriptor()
 
@@ -284,41 +293,16 @@ func TestApi_Metrics(t *testing.T) {
 		t.Fatalf("expected no error but got: %v", err)
 	}
 
-	if len(metrics) != 7 {
-		t.Fatalf("expected %d metrics, but got %d", 7, len(metrics))
+	if len(metrics) != 2 {
+		t.Fatalf("expected %d metrics, but got %d", 2, len(metrics))
 	}
 
 	actual := metrics[0].Read()
-	if actual != float64(1) {
-		t.Errorf("expected %f for unoconv_active_instances_count, but got %f", float64(1), actual)
-	}
-
-	actual = metrics[1].Read()
-	if actual != float64(1) {
-		t.Errorf("expected %f for libreoffice_listener_active_instances_count, but got %f", float64(1), actual)
-	}
-
-	actual = metrics[2].Read()
-	if actual != float64(1) {
-		t.Errorf("expected %f for unoconv_listener_active_instances_count, but got %f", float64(1), actual)
-	}
-
-	actual = metrics[3].Read()
-	if actual != float64(10) {
-		t.Errorf("expected %f for libreoffice_listener_queue_length, but got %f", float64(10), actual)
-	}
-
-	actual = metrics[4].Read()
-	if actual != float64(10) {
-		t.Errorf("expected %f for unoconv_listener_queue_length, but got %f", float64(10), actual)
-	}
-
-	actual = metrics[5].Read()
 	if actual != float64(10) {
 		t.Errorf("expected %f for libreoffice_requests_queue_size, but got %f", float64(10), actual)
 	}
 
-	actual = metrics[6].Read()
+	actual = metrics[1].Read()
 	if actual != float64(0) {
 		t.Errorf("expected %f for libreoffice_restarts_count, but got %f", float64(0), actual)
 	}
@@ -364,6 +348,61 @@ func TestApi_Checks(t *testing.T) {
 	}
 }
 
+func TestChromium_Ready(t *testing.T) {
+	for _, tc := range []struct {
+		scenario     string
+		autoStart    bool
+		startTimeout time.Duration
+		libreOffice  libreOffice
+		expectError  bool
+	}{
+		{
+			scenario:     "no auto-start",
+			autoStart:    false,
+			startTimeout: time.Duration(30) * time.Second,
+			libreOffice: &libreOfficeMock{ProcessMock: gotenberg.ProcessMock{HealthyMock: func(logger *zap.Logger) bool {
+				return false
+			}}},
+			expectError: false,
+		},
+		{
+			scenario:     "auto-start: context done",
+			autoStart:    true,
+			startTimeout: time.Duration(200) * time.Millisecond,
+			libreOffice: &libreOfficeMock{ProcessMock: gotenberg.ProcessMock{HealthyMock: func(logger *zap.Logger) bool {
+				return false
+			}}},
+			expectError: true,
+		},
+		{
+			scenario:     "auto-start success",
+			autoStart:    true,
+			startTimeout: time.Duration(30) * time.Second,
+			libreOffice: &libreOfficeMock{ProcessMock: gotenberg.ProcessMock{HealthyMock: func(logger *zap.Logger) bool {
+				return true
+			}}},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			a.autoStart = tc.autoStart
+			a.args = libreOfficeArguments{startTimeout: tc.startTimeout}
+			a.libreOffice = tc.libreOffice
+
+			err := a.Ready()
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
 func TestApi_LibreOffice(t *testing.T) {
 	a := new(Api)
 
@@ -394,6 +433,13 @@ func TestApi_Pdf(t *testing.T) {
 			}},
 			expectError: true,
 		},
+		{
+			scenario: "ErrCoreDumped",
+			libreOffice: &libreOfficeMock{pdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+				return ErrCoreDumped
+			}},
+			expectError: false,
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			a := new(Api)
@@ -420,7 +466,7 @@ func TestApi_Extensions(t *testing.T) {
 	extensions := a.Extensions()
 
 	actual := len(extensions)
-	expect := 79
+	expect := 130
 
 	if actual != expect {
 		t.Errorf("expected %d extensions, but got %d", expect, actual)

pkg/modules/libreoffice/api/libreoffice.go

@@ -4,15 +4,19 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io"
 	"net"
 	"os"
+	"path/filepath"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
 
+	"github.com/google/uuid"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 type libreOffice interface {
@@ -40,7 +44,7 @@ type libreOfficeProcess struct {
 func newLibreOfficeProcess(arguments libreOfficeArguments) libreOffice {
 	p := &libreOfficeProcess{
 		arguments: arguments,
-		fs:        gotenberg.NewFileSystem(),
+		fs:        gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll)),
 	}
 	p.isStarted.Store(false)
 
@@ -186,22 +190,23 @@ func (p *libreOfficeProcess) Stop(logger *zap.Logger) error {
 
 	// Always remove the user profile directory created by LibreOffice.
 	copyUserProfileDirPath := p.userProfileDirPath
-	defer func(userProfileDirPath string) {
+	expirationTime := time.Now()
+	defer func(userProfileDirPath string, expirationTime time.Time) {
 		go func() {
 			err := os.RemoveAll(userProfileDirPath)
 			if err != nil {
 				logger.Error(fmt.Sprintf("remove LibreOffice's user profile directory: %v", err))
+			} else {
+				logger.Debug(fmt.Sprintf("'%s' LibreOffice's user profile directory removed", userProfileDirPath))
 			}
 
-			logger.Debug(fmt.Sprintf("'%s' LibreOffice's user profile directory removed", userProfileDirPath))
-
 			// Also remove LibreOffice specific files in the temporary directory.
-			err = gotenberg.GarbageCollect(logger, os.TempDir(), []string{"OSL_PIPE", ".tmp"})
+			err = gotenberg.GarbageCollect(logger, os.TempDir(), []string{"OSL_PIPE", ".tmp"}, expirationTime)
 			if err != nil {
 				logger.Error(err.Error())
 			}
 		}()
-	}(copyUserProfileDirPath)
+	}(copyUserProfileDirPath, expirationTime)
 
 	p.cfgMu.Lock()
 	defer p.cfgMu.Unlock()
@@ -262,6 +267,10 @@ func (p *libreOfficeProcess) pdf(ctx context.Context, logger *zap.Logger, inputP
 		args = append(args, "-vvv")
 	}
 
+	if options.Password != "" {
+		args = append(args, "--password", options.Password)
+	}
+
 	if options.Landscape {
 		args = append(args, "--printer", "PaperOrientation=landscape")
 	}
@@ -270,24 +279,58 @@ func (p *libreOfficeProcess) pdf(ctx context.Context, logger *zap.Logger, inputP
 		args = append(args, "--export", fmt.Sprintf("PageRange=%s", options.PageRanges))
 	}
 
+	args = append(args, "--export", fmt.Sprintf("ExportFormFields=%t", options.ExportFormFields))
+	args = append(args, "--export", fmt.Sprintf("AllowDuplicateFieldNames=%t", options.AllowDuplicateFieldNames))
+	args = append(args, "--export", fmt.Sprintf("ExportBookmarks=%t", options.ExportBookmarks))
+	args = append(args, "--export", fmt.Sprintf("ExportBookmarks=%t", options.ExportBookmarks))
+	args = append(args, "--export", fmt.Sprintf("ExportBookmarksToPDFDestination=%t", options.ExportBookmarksToPdfDestination))
+	args = append(args, "--export", fmt.Sprintf("ExportPlaceholders=%t", options.ExportPlaceholders))
+	args = append(args, "--export", fmt.Sprintf("ExportNotes=%t", options.ExportNotes))
+	args = append(args, "--export", fmt.Sprintf("ExportNotesPages=%t", options.ExportNotesPages))
+	args = append(args, "--export", fmt.Sprintf("ExportOnlyNotesPages=%t", options.ExportOnlyNotesPages))
+	args = append(args, "--export", fmt.Sprintf("ExportNotesInMargin=%t", options.ExportNotesInMargin))
+	args = append(args, "--export", fmt.Sprintf("ConvertOOoTargetToPDFTarget=%t", options.ConvertOooTargetToPdfTarget))
+	args = append(args, "--export", fmt.Sprintf("ExportLinksRelativeFsys=%t", options.ExportLinksRelativeFsys))
+	args = append(args, "--export", fmt.Sprintf("ExportHiddenSlides=%t", options.ExportHiddenSlides))
+	args = append(args, "--export", fmt.Sprintf("IsSkipEmptyPages=%t", options.SkipEmptyPages))
+	args = append(args, "--export", fmt.Sprintf("IsAddStream=%t", options.AddOriginalDocumentAsStream))
+	args = append(args, "--export", fmt.Sprintf("SinglePageSheets=%t", options.SinglePageSheets))
+	args = append(args, "--export", fmt.Sprintf("UseLosslessCompression=%t", options.LosslessImageCompression))
+	args = append(args, "--export", fmt.Sprintf("Quality=%d", options.Quality))
+	args = append(args, "--export", fmt.Sprintf("ReduceImageResolution=%t", options.ReduceImageResolution))
+	args = append(args, "--export", fmt.Sprintf("MaxImageResolution=%d", options.MaxImageResolution))
+
 	switch options.PdfFormats.PdfA {
 	case "":
-	case gotenberg.PdfA1a:
+	case gotenberg.PdfA1b:
 		args = append(args, "--export", "SelectPdfVersion=1")
 	case gotenberg.PdfA2b:
 		args = append(args, "--export", "SelectPdfVersion=2")
 	case gotenberg.PdfA3b:
 		args = append(args, "--export", "SelectPdfVersion=3")
 	default:
-		return ErrInvalidPdfFormat
+		return ErrInvalidPdfFormats
 	}
 
 	if options.PdfFormats.PdfUa {
 		args = append(
 			args,
-			"--export", "EnableTextAccessForAccessibilityTools=true",
+			"--export", "PDFUACompliance=true",
 			"--export", "UseTaggedPDF=true",
+			"--export", "EnableTextAccessForAccessibilityTools=true",
 		)
+	} else {
+		args = append(
+			args,
+			"--export", "PDFUACompliance=false",
+			"--export", "UseTaggedPDF=false",
+			"--export", "EnableTextAccessForAccessibilityTools=false",
+		)
+	}
+
+	inputPath, err := nonBasicLatinCharactersGuard(logger, inputPath)
+	if err != nil {
+		return fmt.Errorf("non-basic latin characters guard: %w", err)
 	}
 
 	args = append(args, "--output", outputPath, inputPath)
@@ -305,22 +348,86 @@ func (p *libreOfficeProcess) pdf(ctx context.Context, logger *zap.Logger, inputP
 	}
 
 	// LibreOffice's errors are not explicit.
-	// That's why we have to make an educated guess according to the exit code
-	// and given inputs.
-	if exitCode == 5 && options.PageRanges != "" {
-		return ErrMalformedPageRanges
+	// For instance, an exit code 5 may be explained by a malformed page
+	// ranges, but also by a not required password.
+
+	// We may want to retry in case of a core dumped event.
+	// See https://github.com/gotenberg/gotenberg/issues/639.
+	if strings.Contains(err.Error(), "core dumped") {
+		return ErrCoreDumped
+	}
+
+	if exitCode == 5 {
+		// Potentially malformed page ranges or password not required.
+		return ErrUnoException
+	}
+	if exitCode == 6 {
+		// Password potentially required or invalid.
+		return ErrRuntimeException
 	}
 
-	// Possible errors:
-	// 1. LibreOffice failed for some reason.
-	// 2. Context done.
-	//
-	// On the second scenario, LibreOffice might not have time to remove some
-	// of its temporary files, as it has been killed without warning. The
-	// garbage collector will delete them for us (if the module is loaded).
 	return fmt.Errorf("convert to PDF: %w", err)
 }
 
+// LibreOffice cannot convert a file with a name containing non-basic Latin
+// characters.
+// See:
+// https://github.com/gotenberg/gotenberg/issues/104
+// https://github.com/gotenberg/gotenberg/issues/730
+func nonBasicLatinCharactersGuard(logger *zap.Logger, inputPath string) (string, error) {
+	hasNonBasicLatinChars := func(str string) bool {
+		for _, r := range str {
+			// Check if the character is outside basic Latin.
+			if r != '.' && (r < ' ' || r > '~') {
+				return true
+			}
+		}
+		return false
+	}
+
+	filename := filepath.Base(inputPath)
+	if !hasNonBasicLatinChars(filename) {
+		logger.Debug("no non-basic latin characters in filename, skip copy")
+		return inputPath, nil
+	}
+
+	logger.Warn("non-basic latin characters in filename, copy to a file with a valid filename")
+	basePath := filepath.Dir(inputPath)
+	ext := filepath.Ext(inputPath)
+	newInputPath := filepath.Join(basePath, fmt.Sprintf("%s%s", uuid.NewString(), ext))
+
+	in, err := os.Open(inputPath)
+	if err != nil {
+		return "", fmt.Errorf("open file: %w", err)
+	}
+
+	defer func() {
+		err := in.Close()
+		if err != nil {
+			logger.Error(fmt.Sprintf("close file: %s", err))
+		}
+	}()
+
+	out, err := os.Create(newInputPath)
+	if err != nil {
+		return "", fmt.Errorf("create new file: %w", err)
+	}
+
+	defer func() {
+		err := out.Close()
+		if err != nil {
+			logger.Error(fmt.Sprintf("close new file: %s", err))
+		}
+	}()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		return "", fmt.Errorf("copy file to new file: %w", err)
+	}
+
+	return newInputPath, nil
+}
+
 // Interface guards.
 var (
 	_ gotenberg.Process = (*libreOfficeProcess)(nil)

pkg/modules/libreoffice/api/libreoffice_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"testing"
 	"time"
@@ -11,7 +12,7 @@ import (
 	"github.com/google/uuid"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestLibreOfficeProcess_Start(t *testing.T) {
@@ -229,28 +230,28 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				p.isStarted.Store(false)
 				return p
 			}(),
-			fs:           gotenberg.NewFileSystem(),
+			fs:           gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll)),
 			cancelledCtx: false,
 			start:        false,
 			expectError:  true,
 		},
 		{
-			scenario: "ErrInvalidPdfFormat",
+			scenario: "ErrInvalidPdfFormats",
 			libreOffice: func() libreOffice {
 				p := new(libreOfficeProcess)
 				p.socketPort = 12345
 				p.isStarted.Store(true)
 				return p
 			}(),
-			fs:            gotenberg.NewFileSystem(),
+			fs:            gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll)),
 			options:       Options{PdfFormats: gotenberg.PdfFormats{PdfA: "foo"}},
 			cancelledCtx:  false,
 			start:         false,
 			expectError:   true,
-			expectedError: ErrInvalidPdfFormat,
+			expectedError: ErrInvalidPdfFormats,
 		},
 		{
-			scenario: "ErrMalformedPageRanges",
+			scenario: "ErrUnoException",
 			libreOffice: newLibreOfficeProcess(
 				libreOfficeArguments{
 					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
@@ -260,14 +261,14 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 			),
 			options: Options{PageRanges: "foo"},
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
 					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
 				}
 
-				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("ErrMalformedPageRanges"), 0o755)
+				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Context done"), 0o755)
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
@@ -277,7 +278,61 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 			cancelledCtx:  false,
 			start:         true,
 			expectError:   true,
-			expectedError: ErrMalformedPageRanges,
+			expectedError: ErrUnoException,
+		},
+		{
+			scenario: "ErrRuntimeException",
+			libreOffice: newLibreOfficeProcess(
+				libreOfficeArguments{
+					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
+					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
+					startTimeout: 5 * time.Second,
+				},
+			),
+			options: Options{Password: "foo"},
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				in, err := os.Open("/tests/test/testdata/libreoffice/protected.docx")
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				defer func() {
+					err := in.Close()
+					if err != nil {
+						t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					}
+				}()
+
+				out, err := os.Create(fmt.Sprintf("%s/protected.docx", fs.WorkingDirPath()))
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				defer func() {
+					err := out.Close()
+					if err != nil {
+						t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					}
+				}()
+
+				_, err = io.Copy(out, in)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				return fs
+			}(),
+			cancelledCtx:  false,
+			start:         true,
+			expectError:   true,
+			expectedError: ErrRuntimeException,
 		},
 		{
 			scenario: "context done",
@@ -289,7 +344,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
@@ -317,7 +372,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
@@ -336,7 +391,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 			expectError:  false,
 		},
 		{
-			scenario: "success (landscape)",
+			scenario: "success (not default options)",
 			libreOffice: newLibreOfficeProcess(
 				libreOfficeArguments{
 					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
@@ -345,27 +400,50 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
 					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
 				}
 
-				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Landscape"), 0o755)
+				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Success"), 0o755)
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				return fs
 			}(),
-			options:      Options{Landscape: true},
+			options: Options{
+				Password:                        "", // Ok, the only exception in this list.
+				Landscape:                       true,
+				PageRanges:                      "1",
+				ExportFormFields:                false,
+				AllowDuplicateFieldNames:        true,
+				ExportBookmarks:                 false,
+				ExportBookmarksToPdfDestination: true,
+				ExportPlaceholders:              true,
+				ExportNotes:                     true,
+				ExportNotesPages:                true,
+				ExportOnlyNotesPages:            true,
+				ExportNotesInMargin:             true,
+				ConvertOooTargetToPdfTarget:     true,
+				ExportLinksRelativeFsys:         true,
+				ExportHiddenSlides:              true,
+				SkipEmptyPages:                  true,
+				AddOriginalDocumentAsStream:     true,
+				SinglePageSheets:                true,
+				LosslessImageCompression:        true,
+				Quality:                         100,
+				ReduceImageResolution:           true,
+				MaxImageResolution:              600,
+			},
 			cancelledCtx: false,
 			start:        true,
 			expectError:  false,
 		},
 		{
-			scenario: "success (page ranges)",
+			scenario: "success (PDF/A-1b)",
 			libreOffice: newLibreOfficeProcess(
 				libreOfficeArguments{
 					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
@@ -374,7 +452,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
@@ -388,36 +466,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				return fs
 			}(),
-			options:      Options{PageRanges: "1-1"},
-			cancelledCtx: false,
-			start:        true,
-			expectError:  false,
-		},
-		{
-			scenario: "success (PDF/A-1a)",
-			libreOffice: newLibreOfficeProcess(
-				libreOfficeArguments{
-					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
-					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
-					startTimeout: 5 * time.Second,
-				},
-			),
-			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
-
-				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
-				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
-				}
-
-				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Landscape"), 0o755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return fs
-			}(),
-			options:      Options{PdfFormats: gotenberg.PdfFormats{PdfA: gotenberg.PdfA1a}},
+			options:      Options{PdfFormats: gotenberg.PdfFormats{PdfA: gotenberg.PdfA1b}},
 			cancelledCtx: false,
 			start:        true,
 			expectError:  false,
@@ -432,7 +481,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
@@ -461,7 +510,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
@@ -490,7 +539,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 				},
 			),
 			fs: func() *gotenberg.FileSystem {
-				fs := gotenberg.NewFileSystem()
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
@@ -545,7 +594,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 			err := tc.libreOffice.pdf(
 				ctx,
 				logger,
-				fmt.Sprintf("file://%s/document.txt", tc.fs.WorkingDirPath()),
+				fmt.Sprintf("%s/document.txt", tc.fs.WorkingDirPath()),
 				fmt.Sprintf("%s/%s.pdf", tc.fs.WorkingDirPath(), uuid.NewString()),
 				tc.options,
 			)
@@ -564,3 +613,87 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 		})
 	}
 }
+
+func TestNonBasicLatinCharactersGuard(t *testing.T) {
+	for _, tc := range []struct {
+		scenario            string
+		fs                  *gotenberg.FileSystem
+		filename            string
+		expectSameInputPath bool
+		expectError         bool
+	}{
+		{
+			scenario: "basic latin characters",
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Basic latin characters"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			filename:            "document.txt",
+			expectSameInputPath: true,
+			expectError:         false,
+		},
+		{
+			scenario: "non-basic latin characters",
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/éèßàùä.txt", fs.WorkingDirPath()), []byte("Non-basic latin characters"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			filename:            "éèßàùä.txt",
+			expectSameInputPath: false,
+			expectError:         false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			defer func() {
+				err := os.RemoveAll(tc.fs.WorkingDirPath())
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up, but got: %v", err)
+				}
+			}()
+
+			inputPath := fmt.Sprintf("%s/%s", tc.fs.WorkingDirPath(), tc.filename)
+			newInputPath, err := nonBasicLatinCharactersGuard(
+				zap.NewNop(),
+				inputPath,
+			)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectSameInputPath && newInputPath != inputPath {
+				t.Fatalf("expected same input path, but got '%s'", newInputPath)
+			}
+
+			if !tc.expectSameInputPath && newInputPath == inputPath {
+				t.Fatalf("expected different input path, but got same '%s'", newInputPath)
+			}
+		})
+	}
+}

pkg/modules/libreoffice/api/mocks.go

@@ -2,10 +2,11 @@ package api
 
 import (
 	"context"
+	"errors"
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 // ApiMock is a mock for the [Uno] interface.
@@ -33,12 +34,21 @@ func (provider *ProviderMock) LibreOffice() (Uno, error) {
 
 // libreOfficeMock is a mock for the [libreOffice] interface.
 type libreOfficeMock struct {
+	errCoreDumpedCount int
+
 	gotenberg.ProcessMock
 	pdfMock func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error
 }
 
 func (b *libreOfficeMock) pdf(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-	return b.pdfMock(ctx, logger, inputPath, outputPath, options)
+	err := b.pdfMock(ctx, logger, inputPath, outputPath, options)
+	if errors.Is(err, ErrCoreDumped) {
+		b.errCoreDumpedCount += 1
+	}
+	if b.errCoreDumpedCount > 1 {
+		return nil
+	}
+	return err
 }
 
 // Interface guards.

pkg/modules/libreoffice/api/mocks_test.go

@@ -42,14 +42,53 @@ func TestProviderMock(t *testing.T) {
 }
 
 func TestLibreOfficeMock(t *testing.T) {
-	mock := &libreOfficeMock{
-		pdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-			return nil
+	for _, tc := range []struct {
+		scenario    string
+		mock        *libreOfficeMock
+		expectError bool
+	}{
+		{
+			scenario: "success",
+			mock: &libreOfficeMock{
+				pdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+					return nil
+				},
+			},
+			expectError: false,
 		},
-	}
+		{
+			scenario: "ErrCoreDumped (first call)",
+			mock: &libreOfficeMock{
+				pdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+					return ErrCoreDumped
+				},
+			},
+			expectError: true,
+		},
+		{
+			scenario: "ErrCoreDumped (second call)",
+			mock: func() *libreOfficeMock {
+				m := &libreOfficeMock{
+					pdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+						return ErrCoreDumped
+					},
+				}
+				m.pdf(context.Background(), zap.NewNop(), "", "", Options{})
+				return m
+			}(),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			err := tc.mock.pdf(context.Background(), zap.NewNop(), "", "", Options{})
 
-	err := mock.pdf(context.Background(), zap.NewNop(), "", "", Options{})
-	if err != nil {
-		t.Errorf("expected no error from libreOfficeMock.pdf, but got: %v", err)
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error from libreOfficeMock.pdf but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error from libreOfficeMock.pdf but got none")
+			}
+		})
 	}
 }

pkg/modules/libreoffice/libreoffice.go

@@ -5,9 +5,9 @@ import (
 
 	flag "github.com/spf13/pflag"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	libeofficeapi "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
+	libeofficeapi "github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func init() {

pkg/modules/libreoffice/libreoffice_test.go

@@ -5,8 +5,8 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	libreofficeapi "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	libreofficeapi "github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func TestLibreOffice_Descriptor(t *testing.T) {

pkg/modules/libreoffice/pdfengine/doc.go

@@ -1,4 +1,6 @@
 // Package pdfengine provides a module which interacts with LibreOffice via the
 // UNO (Universal Network Objects) API and implements the gotenberg.PdfEngine
-// interface.
+// interface. This package allows for:
+//
+// 1. The conversion to specific PDF formats.
 package pdfengine

pkg/modules/libreoffice/pdfengine/pdfengine.go

@@ -7,8 +7,8 @@ import (
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func init() {
@@ -18,7 +18,7 @@ func init() {
 // LibreOfficePdfEngine interacts with the LibreOffice (Universal Network Objects) API
 // and implements the [gotenberg.PdfEngine] interface.
 type LibreOfficePdfEngine struct {
-	unoAPI api.Uno
+	unoApi api.Uno
 }
 
 // Descriptor returns a [LibreOfficePdfEngine]'s module descriptor.
@@ -36,12 +36,12 @@ func (engine *LibreOfficePdfEngine) Provision(ctx *gotenberg.Context) error {
 		return fmt.Errorf("get LibreOffice Uno provider: %w", err)
 	}
 
-	unoAPI, err := provider.(api.Provider).LibreOffice()
+	unoApi, err := provider.(api.Provider).LibreOffice()
 	if err != nil {
 		return fmt.Errorf("get LibreOffice Uno: %w", err)
 	}
 
-	engine.unoAPI = unoAPI
+	engine.unoApi = unoApi
 
 	return nil
 }
@@ -51,26 +51,46 @@ func (engine *LibreOfficePdfEngine) Merge(ctx context.Context, logger *zap.Logge
 	return fmt.Errorf("merge PDFs with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
 }
 
+// Split is not available in this implementation.
+func (engine *LibreOfficePdfEngine) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	return nil, fmt.Errorf("split PDF with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// Flatten is not available in this implementation.
+func (engine *LibreOfficePdfEngine) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	return fmt.Errorf("Flatten PDF with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
 // Convert converts the given PDF to a specific PDF format. Currently, only the
-// PDF/A-1a, PDF/A-2b, PDF/A-3b and PDF/UA formats are available. If another
+// PDF/A-1b, PDF/A-2b, PDF/A-3b and PDF/UA formats are available. If another
 // PDF format is requested, it returns a [gotenberg.ErrPdfFormatNotSupported]
 // error.
 func (engine *LibreOfficePdfEngine) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-	err := engine.unoAPI.Pdf(ctx, logger, inputPath, outputPath, api.Options{
-		PdfFormats: formats,
-	})
+	opts := api.DefaultOptions()
+	opts.PdfFormats = formats
+	err := engine.unoApi.Pdf(ctx, logger, inputPath, outputPath, opts)
 
 	if err == nil {
 		return nil
 	}
 
-	if errors.Is(err, api.ErrInvalidPdfFormat) {
+	if errors.Is(err, api.ErrInvalidPdfFormats) {
 		return fmt.Errorf("convert PDF to '%+v' with LibreOffice: %w", formats, gotenberg.ErrPdfFormatNotSupported)
 	}
 
 	return fmt.Errorf("convert PDF to '%+v' with LibreOffice: %w", formats, err)
 }
 
+// ReadMetadata is not available in this implementation.
+func (engine *LibreOfficePdfEngine) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	return nil, fmt.Errorf("read PDF metadata with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// WriteMetadata is not available in this implementation.
+func (engine *LibreOfficePdfEngine) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	return fmt.Errorf("write PDF metadata with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
 // Interface guards.
 var (
 	_ gotenberg.Module      = (*LibreOfficePdfEngine)(nil)

pkg/modules/libreoffice/pdfengine/pdfengine_test.go

@@ -8,8 +8,8 @@ import (
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func TestLibreOfficePdfEngine_Descriptor(t *testing.T) {
@@ -118,11 +118,30 @@ func TestLibreOfficePdfEngine_Merge(t *testing.T) {
 	}
 }
 
+func TestLibreOfficePdfEngine_Split(t *testing.T) {
+	engine := new(LibreOfficePdfEngine)
+	_, err := engine.Split(context.Background(), zap.NewNop(), gotenberg.SplitMode{}, "", "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestLibreOfficePdfEngine_Flatten(t *testing.T) {
+	engine := new(LibreOfficePdfEngine)
+	err := engine.Flatten(context.Background(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
 func TestLibreOfficePdfEngine_Convert(t *testing.T) {
 	for _, tc := range []struct {
-		scenario    string
-		api         api.Uno
-		expectError bool
+		scenario      string
+		api           api.Uno
+		expectError   bool
+		expectedError error
 	}{
 		{
 			scenario: "convert success",
@@ -134,13 +153,14 @@ func TestLibreOfficePdfEngine_Convert(t *testing.T) {
 			expectError: false,
 		},
 		{
-			scenario: "invalid PDF format",
+			scenario: "ErrInvalidPdfFormats",
 			api: &api.ApiMock{
 				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options api.Options) error {
-					return api.ErrInvalidPdfFormat
+					return api.ErrInvalidPdfFormats
 				},
 			},
-			expectError: true,
+			expectError:   true,
+			expectedError: gotenberg.ErrPdfFormatNotSupported,
 		},
 		{
 			scenario: "convert fail",
@@ -153,7 +173,7 @@ func TestLibreOfficePdfEngine_Convert(t *testing.T) {
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
-			engine := &LibreOfficePdfEngine{unoAPI: tc.api}
+			engine := &LibreOfficePdfEngine{unoApi: tc.api}
 			err := engine.Convert(context.Background(), zap.NewNop(), gotenberg.PdfFormats{}, "", "")
 
 			if !tc.expectError && err != nil {
@@ -163,6 +183,28 @@ func TestLibreOfficePdfEngine_Convert(t *testing.T) {
 			if tc.expectError && err == nil {
 				t.Fatal("expected error but got none")
 			}
+
+			if tc.expectedError != nil && !errors.Is(err, tc.expectedError) {
+				t.Fatalf("expected error %v but got: %v", tc.expectedError, err)
+			}
 		})
 	}
 }
+
+func TestLibreOfficePdfEngine_ReadMetadata(t *testing.T) {
+	engine := new(LibreOfficePdfEngine)
+	_, err := engine.ReadMetadata(context.Background(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestLibreOfficePdfEngine_WriteMetadata(t *testing.T) {
+	engine := new(LibreOfficePdfEngine)
+	err := engine.WriteMetadata(context.Background(), zap.NewNop(), nil, "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}

pkg/modules/libreoffice/routes.go

@@ -1,15 +1,19 @@
 package libreoffice
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
+	"slices"
+	"strconv"
 
 	"github.com/labstack/echo/v4"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	libreofficeapi "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
+	libreofficeapi "github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/pdfengines"
 )
 
 // convertRoute returns an [api.Route] which can convert LibreOffice documents
@@ -21,96 +25,180 @@ func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) ap
 		IsMultipart: true,
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
+			defaultOptions := libreofficeapi.DefaultOptions()
+
+			form := ctx.FormData()
+			splitMode := pdfengines.FormDataPdfSplitMode(form, false)
+			pdfFormats := pdfengines.FormDataPdfFormats(form)
+			metadata := pdfengines.FormDataPdfMetadata(form, false)
+
+			zeroValuedSplitMode := gotenberg.SplitMode{}
 
-			// Let's get the data from the form and validate them.
 			var (
-				inputPaths         []string
-				landscape          bool
-				nativePageRanges   string
-				nativePdfA1aFormat bool
-				nativePdfFormat    string
-				pdfFormat          string
-				pdfa               string
-				pdfua              bool
-				nativePdfFormats   bool
-				merge              bool
+				inputPaths                      []string
+				password                        string
+				landscape                       bool
+				nativePageRanges                string
+				exportFormFields                bool
+				allowDuplicateFieldNames        bool
+				exportBookmarks                 bool
+				exportBookmarksToPdfDestination bool
+				exportPlaceholders              bool
+				exportNotes                     bool
+				exportNotesPages                bool
+				exportOnlyNotesPages            bool
+				exportNotesInMargin             bool
+				convertOooTargetToPdfTarget     bool
+				exportLinksRelativeFsys         bool
+				exportHiddenSlides              bool
+				skipEmptyPages                  bool
+				addOriginalDocumentAsStream     bool
+				singlePageSheets                bool
+				losslessImageCompression        bool
+				quality                         int
+				reduceImageResolution           bool
+				maxImageResolution              int
+				nativePdfFormats                bool
+				merge                           bool
+				flatten                         bool
 			)
 
-			err := ctx.FormData().
+			err := form.
 				MandatoryPaths(libreOffice.Extensions(), &inputPaths).
-				Bool("landscape", &landscape, false).
-				String("nativePageRanges", &nativePageRanges, "").
-				Bool("nativePdfA1aFormat", &nativePdfA1aFormat, false).
-				String("nativePdfFormat", &nativePdfFormat, "").
-				String("pdfFormat", &pdfFormat, "").
-				String("pdfa", &pdfa, "").
-				Bool("pdfua", &pdfua, false).
+				String("password", &password, defaultOptions.Password).
+				Bool("landscape", &landscape, defaultOptions.Landscape).
+				String("nativePageRanges", &nativePageRanges, defaultOptions.PageRanges).
+				Bool("exportFormFields", &exportFormFields, defaultOptions.ExportFormFields).
+				Bool("allowDuplicateFieldNames", &allowDuplicateFieldNames, defaultOptions.AllowDuplicateFieldNames).
+				Bool("exportBookmarks", &exportBookmarks, defaultOptions.ExportBookmarks).
+				Bool("exportBookmarksToPdfDestination", &exportBookmarksToPdfDestination, defaultOptions.ExportBookmarksToPdfDestination).
+				Bool("exportPlaceholders", &exportPlaceholders, defaultOptions.ExportPlaceholders).
+				Bool("exportNotes", &exportNotes, defaultOptions.ExportNotes).
+				Bool("exportNotesPages", &exportNotesPages, defaultOptions.ExportNotesPages).
+				Bool("exportOnlyNotesPages", &exportOnlyNotesPages, defaultOptions.ExportOnlyNotesPages).
+				Bool("exportNotesInMargin", &exportNotesInMargin, defaultOptions.ExportNotesInMargin).
+				Bool("convertOooTargetToPdfTarget", &convertOooTargetToPdfTarget, defaultOptions.ConvertOooTargetToPdfTarget).
+				Bool("exportLinksRelativeFsys", &exportLinksRelativeFsys, defaultOptions.ExportLinksRelativeFsys).
+				Bool("exportHiddenSlides", &exportHiddenSlides, defaultOptions.ExportHiddenSlides).
+				Bool("skipEmptyPages", &skipEmptyPages, defaultOptions.SkipEmptyPages).
+				Bool("addOriginalDocumentAsStream", &addOriginalDocumentAsStream, defaultOptions.AddOriginalDocumentAsStream).
+				Bool("singlePageSheets", &singlePageSheets, defaultOptions.SinglePageSheets).
+				Bool("losslessImageCompression", &losslessImageCompression, defaultOptions.LosslessImageCompression).
+				Custom("quality", func(value string) error {
+					if value == "" {
+						quality = defaultOptions.Quality
+						return nil
+					}
+
+					intValue, err := strconv.Atoi(value)
+					if err != nil {
+						return err
+					}
+
+					if intValue < 1 {
+						return errors.New("value is inferior to 1")
+					}
+
+					if intValue > 100 {
+						return errors.New("value is superior to 100")
+					}
+
+					quality = intValue
+					return nil
+				}).
+				Bool("reduceImageResolution", &reduceImageResolution, defaultOptions.ReduceImageResolution).
+				Custom("maxImageResolution", func(value string) error {
+					if value == "" {
+						maxImageResolution = defaultOptions.MaxImageResolution
+						return nil
+					}
+
+					intValue, err := strconv.Atoi(value)
+					if err != nil {
+						return err
+					}
+
+					if !slices.Contains([]int{75, 150, 300, 600, 1200}, intValue) {
+						return errors.New("value is not 75, 150, 300, 600 or 1200")
+					}
+
+					maxImageResolution = intValue
+					return nil
+				}).
 				Bool("nativePdfFormats", &nativePdfFormats, true).
 				Bool("merge", &merge, false).
+				Custom("metadata", func(value string) error {
+					if len(value) > 0 {
+						err := json.Unmarshal([]byte(value), &metadata)
+						if err != nil {
+							return fmt.Errorf("unmarshal metadata: %w", err)
+						}
+					}
+					return nil
+				}).
+				Bool("flatten", &flatten, false).
 				Validate()
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			// FIXME: deprecated.
-			// pdfa > nativePdfFormat > pdfFormat > nativePdfA1aFormat.
-			var (
-				actualPdfArchive string
-				nativeFormats    bool
-			)
-
-			if nativePdfA1aFormat {
-				ctx.Log().Warn("'nativePdfA1aFormat' is deprecated; prefer the 'pdfa' form field instead")
-				actualPdfArchive = gotenberg.PdfA1a
-				nativeFormats = true
-			}
-
-			if pdfFormat != "" {
-				ctx.Log().Warn("'pdfFormat' is deprecated; prefer the 'pdfa' form field instead")
-				actualPdfArchive = pdfFormat
-				nativeFormats = false
-			}
-
-			if nativePdfFormat != "" {
-				ctx.Log().Warn("'nativePdfFormat' is deprecated; prefer the 'pdfa' form field instead")
-				actualPdfArchive = nativePdfFormat
-				nativeFormats = true
-			}
-
-			if pdfa != "" {
-				actualPdfArchive = pdfa
-				nativeFormats = nativePdfFormats
-			}
-
-			if pdfua {
-				nativeFormats = nativePdfFormats
-			}
-
-			pdfFormats := gotenberg.PdfFormats{
-				PdfA:  actualPdfArchive,
-				PdfUa: pdfua,
-			}
-
-			// Alright, let's convert each document to PDF.
 			outputPaths := make([]string, len(inputPaths))
 			for i, inputPath := range inputPaths {
 				outputPaths[i] = ctx.GeneratePath(".pdf")
-
 				options := libreofficeapi.Options{
-					Landscape:  landscape,
-					PageRanges: nativePageRanges,
+					Password:                        password,
+					Landscape:                       landscape,
+					PageRanges:                      nativePageRanges,
+					ExportFormFields:                exportFormFields,
+					AllowDuplicateFieldNames:        allowDuplicateFieldNames,
+					ExportBookmarks:                 exportBookmarks,
+					ExportBookmarksToPdfDestination: exportBookmarksToPdfDestination,
+					ExportPlaceholders:              exportPlaceholders,
+					ExportNotes:                     exportNotes,
+					ExportNotesPages:                exportNotesPages,
+					ExportOnlyNotesPages:            exportOnlyNotesPages,
+					ExportNotesInMargin:             exportNotesInMargin,
+					ConvertOooTargetToPdfTarget:     convertOooTargetToPdfTarget,
+					ExportLinksRelativeFsys:         exportLinksRelativeFsys,
+					ExportHiddenSlides:              exportHiddenSlides,
+					SkipEmptyPages:                  skipEmptyPages,
+					AddOriginalDocumentAsStream:     addOriginalDocumentAsStream,
+					SinglePageSheets:                singlePageSheets,
+					LosslessImageCompression:        losslessImageCompression,
+					Quality:                         quality,
+					ReduceImageResolution:           reduceImageResolution,
+					MaxImageResolution:              maxImageResolution,
 				}
 
-				if nativeFormats {
+				if nativePdfFormats && splitMode == zeroValuedSplitMode {
+					// Only apply natively given PDF formats if we're not
+					// splitting the PDF later.
 					options.PdfFormats = pdfFormats
 				}
 
 				err = libreOffice.Pdf(ctx, ctx.Log(), inputPath, outputPaths[i], options)
 				if err != nil {
-					if errors.Is(err, libreofficeapi.ErrMalformedPageRanges) {
+					if errors.Is(err, libreofficeapi.ErrInvalidPdfFormats) {
 						return api.WrapError(
 							fmt.Errorf("convert to PDF: %w", err),
-							api.NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Malformed page ranges '%s' (nativePageRanges)", options.PageRanges)),
+							api.NewSentinelHttpError(
+								http.StatusBadRequest,
+								fmt.Sprintf("A PDF format in '%+v' is not supported", pdfFormats),
+							),
+						)
+					}
+
+					if errors.Is(err, libreofficeapi.ErrUnoException) {
+						return api.WrapError(
+							fmt.Errorf("convert to PDF: %w", err),
+							api.NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("LibreOffice failed to process a document: possible causes include malformed page ranges '%s' (nativePageRanges), or, if a password has been provided, it may not be required. In any case, the exact cause is uncertain.", options.PageRanges)),
+						)
+					}
+
+					if errors.Is(err, libreofficeapi.ErrRuntimeException) {
+						return api.WrapError(
+							fmt.Errorf("convert to PDF: %w", err),
+							api.NewSentinelHttpError(http.StatusBadRequest, "LibreOffice failed to process a document: a password may be required, or, if one has been given, it is invalid. In any case, the exact cause is uncertain."),
 						)
 					}
 
@@ -118,88 +206,84 @@ func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) ap
 				}
 			}
 
-			// So far so good, let's check if we have to merge the PDFs. Quick
-			// win: if there is only one PDF, skip this step.
-
-			if len(outputPaths) > 1 && merge {
-				outputPath := ctx.GeneratePath(".pdf")
-
-				err = engine.Merge(ctx, ctx.Log(), outputPaths, outputPath)
+			if merge {
+				outputPath, err := pdfengines.MergeStub(ctx, engine, outputPaths)
 				if err != nil {
 					return fmt.Errorf("merge PDFs: %w", err)
 				}
 
-				// Now, let's check if the client want to convert this result
-				// PDF to specific PDF formats.
-				zeroValued := gotenberg.PdfFormats{}
-				if !nativeFormats && pdfFormats != zeroValued {
-					convertInputPath := outputPath
-					convertOutputPath := ctx.GeneratePath(".pdf")
+				// Only one output path.
+				outputPaths = []string{outputPath}
+			}
 
-					err = engine.Convert(ctx, ctx.Log(), pdfFormats, convertInputPath, convertOutputPath)
-					if err != nil {
-						if errors.Is(err, gotenberg.ErrPdfFormatNotSupported) {
-							return api.WrapError(
-								fmt.Errorf("convert PDF: %w", err),
-								api.NewSentinelHttpError(
-									http.StatusBadRequest,
-									fmt.Sprintf("At least one PDF engine does not handle one of the PDF format in '%+v', while other have failed to convert for other reasons", pdfFormats),
-								),
-							)
+			if splitMode != zeroValuedSplitMode {
+				if !merge {
+					// document.docx -> document.docx.pdf, so that split naming
+					// document.docx_0.pdf, etc.
+					for i, inputPath := range inputPaths {
+						outputPath := fmt.Sprintf("%s.pdf", inputPath)
+
+						err = ctx.Rename(outputPaths[i], outputPath)
+						if err != nil {
+							return fmt.Errorf("rename output path: %w", err)
 						}
 
-						return fmt.Errorf("convert PDF: %w", err)
+						outputPaths[i] = outputPath
 					}
-
-					// Important: the output path is now the converted file.
-					outputPath = convertOutputPath
 				}
 
-				// Last but not least, add the output path to the context so that
-				// the Uno is able to send it as a response to the client.
-
-				err = ctx.AddOutputPaths(outputPath)
+				outputPaths, err = pdfengines.SplitPdfStub(ctx, engine, splitMode, outputPaths)
 				if err != nil {
-					return fmt.Errorf("add output path: %w", err)
+					return fmt.Errorf("split PDFs: %w", err)
 				}
-
-				return nil
 			}
 
-			// Ok, we don't have to merge the PDFs. Let's check if the client
-			// want to convert each PDF to a specific PDF format.
-			zeroValued := gotenberg.PdfFormats{}
-			if !nativeFormats && pdfFormats != zeroValued {
-				convertOutputPaths := make([]string, len(outputPaths))
+			if !nativePdfFormats || (nativePdfFormats && splitMode != zeroValuedSplitMode) {
+				convertOutputPaths, err := pdfengines.ConvertStub(ctx, engine, pdfFormats, outputPaths)
+				if err != nil {
+					return fmt.Errorf("convert PDFs: %w", err)
+				}
 
-				for i, outputPath := range outputPaths {
-					convertInputPath := outputPath
-					convertOutputPaths[i] = ctx.GeneratePath(".pdf")
-
-					err = engine.Convert(ctx, ctx.Log(), pdfFormats, convertInputPath, convertOutputPaths[i])
-					if err != nil {
-						if errors.Is(err, gotenberg.ErrPdfFormatNotSupported) {
-							return api.WrapError(
-								fmt.Errorf("convert PDF: %w", err),
-								api.NewSentinelHttpError(
-									http.StatusBadRequest,
-									fmt.Sprintf("At least one PDF engine does not handle one of the PDF format in '%+v', while other have failed to convert for other reasons", pdfFormats),
-								),
-							)
+				if splitMode != zeroValuedSplitMode {
+					// The PDF has been split and split parts have been converted to
+					// specific formats. We want to keep the split naming.
+					for i, convertOutputPath := range convertOutputPaths {
+						err = ctx.Rename(convertOutputPath, outputPaths[i])
+						if err != nil {
+							return fmt.Errorf("rename output path: %w", err)
 						}
+					}
+				} else {
+					outputPaths = convertOutputPaths
+				}
+			}
 
-						return fmt.Errorf("convert PDF: %w", err)
+			err = pdfengines.WriteMetadataStub(ctx, engine, metadata, outputPaths)
+			if err != nil {
+				return fmt.Errorf("write metadata: %w", err)
+			}
+
+			if flatten {
+				err = pdfengines.FlattenStub(ctx, engine, outputPaths)
+				if err != nil {
+					return fmt.Errorf("flatten PDFs: %w", err)
+				}
+			}
+
+			if len(outputPaths) > 1 && splitMode == zeroValuedSplitMode {
+				// If .zip archive, document.docx -> document.docx.pdf.
+				for i, inputPath := range inputPaths {
+					outputPath := fmt.Sprintf("%s.pdf", inputPath)
+
+					err = ctx.Rename(outputPaths[i], outputPath)
+					if err != nil {
+						return fmt.Errorf("rename output path: %w", err)
 					}
 
+					outputPaths[i] = outputPath
 				}
-
-				// Important: the output paths are now the converted files.
-				outputPaths = convertOutputPaths
 			}
 
-			// Last but not least, add the output paths to the context so that
-			// the Uno is able to send them as a response to the client.
-
 			err = ctx.AddOutputPaths(outputPaths...)
 			if err != nil {
 				return fmt.Errorf("add output paths: %w", err)

pkg/modules/libreoffice/routes_test.go

@@ -3,15 +3,19 @@ package libreoffice
 import (
 	"context"
 	"errors"
+	"fmt"
 	"net/http"
+	"os"
+	"path/filepath"
+	"slices"
 	"testing"
 
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	libreofficeapi "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
+	libreofficeapi "github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func TestConvertRoute(t *testing.T) {
@@ -25,6 +29,7 @@ func TestConvertRoute(t *testing.T) {
 		expectHttpError        bool
 		expectHttpStatus       int
 		expectOutputPathsCount int
+		expectOutputPaths      []string
 	}{
 		{
 			scenario: "missing at least one mandatory file",
@@ -38,7 +43,139 @@ func TestConvertRoute(t *testing.T) {
 			expectOutputPathsCount: 0,
 		},
 		{
-			scenario: "ErrMalformedPageRanges",
+			scenario: "invalid quality form field (not an integer)",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"quality": {
+						"foo",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{ExtensionsMock: func() []string {
+				return []string{".docx"}
+			}},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "invalid quality form field (< 1)",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"quality": {
+						"0",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{ExtensionsMock: func() []string {
+				return []string{".docx"}
+			}},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "invalid quality form field (> 100)",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"quality": {
+						"101",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{ExtensionsMock: func() []string {
+				return []string{".docx"}
+			}},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "invalid maxImageResolution form field (not an integer)",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"maxImageResolution": {
+						"foo",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{ExtensionsMock: func() []string {
+				return []string{".docx"}
+			}},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "invalid maxImageResolution form field (not in range)",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"maxImageResolution": {
+						"1",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{ExtensionsMock: func() []string {
+				return []string{".docx"}
+			}},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "invalid metadata form field",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"metadata": {
+						"foo",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{ExtensionsMock: func() []string {
+				return []string{".docx"}
+			}},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "ErrPdfFormatNotSupported (nativePdfFormats)",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
@@ -48,7 +185,61 @@ func TestConvertRoute(t *testing.T) {
 			}(),
 			libreOffice: &libreofficeapi.ApiMock{
 				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return libreofficeapi.ErrMalformedPageRanges
+					return libreofficeapi.ErrInvalidPdfFormats
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx"}
+				},
+			},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "ErrUnoException",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"nativePageRanges": {
+						"foo",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return libreofficeapi.ErrUnoException
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx"}
+				},
+			},
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusBadRequest,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "ErrRuntimeException",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"password": {
+						"invalid",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return libreofficeapi.ErrRuntimeException
 				},
 				ExtensionsMock: func() []string {
 					return []string{".docx"}
@@ -81,15 +272,16 @@ func TestConvertRoute(t *testing.T) {
 			expectOutputPathsCount: 0,
 		},
 		{
-			scenario: "ErrPdfFormatNotSupported (single file)",
+			scenario: "PDF engine merge error",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
-					"document.docx": "/document.docx",
+					"document.docx":  "/document.docx",
+					"document2.docx": "/document2.docx",
 				})
 				ctx.SetValues(map[string][]string{
-					"pdfFormat": {
-						"foo",
+					"merge": {
+						"true",
 					},
 				})
 				return ctx
@@ -103,25 +295,61 @@ func TestConvertRoute(t *testing.T) {
 				},
 			},
 			engine: &gotenberg.PdfEngineMock{
-				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-					return gotenberg.ErrPdfFormatNotSupported
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					return errors.New("foo")
 				},
 			},
 			expectError:            true,
-			expectHttpError:        true,
-			expectHttpStatus:       http.StatusBadRequest,
+			expectHttpError:        false,
 			expectOutputPathsCount: 0,
 		},
 		{
-			scenario: "PDF engine convert error (single file)",
+			scenario: "PDF engine split error",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
 					"document.docx": "/document.docx",
 				})
 				ctx.SetValues(map[string][]string{
-					"pdfFormat": {
-						gotenberg.PdfA1a,
+					"splitMode": {
+						gotenberg.SplitModeIntervals,
+					},
+					"splitSpan": {
+						"1",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return nil
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx"}
+				},
+			},
+			engine: &gotenberg.PdfEngineMock{
+				SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+					return nil, errors.New("foo")
+				},
+			},
+			expectError:            true,
+			expectHttpError:        false,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "PDF engine convert error",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"pdfa": {
+						gotenberg.PdfA1b,
+					},
+					"nativePdfFormats": {
+						"false",
 					},
 				})
 				return ctx
@@ -144,7 +372,70 @@ func TestConvertRoute(t *testing.T) {
 			expectOutputPathsCount: 0,
 		},
 		{
-			scenario: "cannot add output paths (single file)",
+			scenario: "PDF engine write metadata error",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"metadata": {
+						"{\"Creator\": \"foo\", \"Producer\": \"bar\" }",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return nil
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx"}
+				},
+			},
+			engine: &gotenberg.PdfEngineMock{
+				WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+					return errors.New("foo")
+				},
+			},
+			expectError:            true,
+			expectHttpError:        false,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "PDF engine flatten error",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"flatten": {
+						"true",
+					},
+				})
+				ctx.SetCancelled(true)
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return nil
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx"}
+				},
+			},
+			engine: &gotenberg.PdfEngineMock{
+				FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+					return errors.New("foo")
+				},
+			},
+			expectError:            true,
+			expectHttpError:        false,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario: "cannot add output paths",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
@@ -170,7 +461,34 @@ func TestConvertRoute(t *testing.T) {
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
-					"document.docx": "/document.docx",
+					"document.docx":  "/document.docx",
+					"document2.docx": "/document2.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"quality": {
+						"100",
+					},
+					"maxImageResolution": {
+						"1200",
+					},
+					"merge": {
+						"true",
+					},
+					"pdfa": {
+						gotenberg.PdfA1b,
+					},
+					"pdfua": {
+						"true",
+					},
+					"nativePdfFormats": {
+						"false",
+					},
+					"metadata": {
+						"{\"Creator\": \"foo\", \"Producer\": \"bar\" }",
+					},
+					"flatten": {
+						"true",
+					},
 				})
 				return ctx
 			}(),
@@ -182,6 +500,20 @@ func TestConvertRoute(t *testing.T) {
 					return []string{".docx"}
 				},
 			},
+			engine: &gotenberg.PdfEngineMock{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+					return nil
+				},
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					return nil
+				},
+				WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+					return nil
+				},
+				FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+					return nil
+				},
+			},
 			expectError:            false,
 			expectHttpError:        false,
 			expectOutputPathsCount: 1,
@@ -193,74 +525,11 @@ func TestConvertRoute(t *testing.T) {
 				ctx.SetFiles(map[string]string{
 					"document.docx":  "/document.docx",
 					"document2.docx": "/document2.docx",
-				})
-				return ctx
-			}(),
-			libreOffice: &libreofficeapi.ApiMock{
-				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return nil
-				},
-				ExtensionsMock: func() []string {
-					return []string{".docx"}
-				},
-			},
-			expectError:            false,
-			expectHttpError:        false,
-			expectOutputPathsCount: 2,
-		},
-		{
-			scenario: "success with non-native PDF/A (single file)",
-			ctx: func() *api.ContextMock {
-				ctx := &api.ContextMock{Context: new(api.Context)}
-				ctx.SetFiles(map[string]string{
-					"document.docx": "/document.docx",
+					"document2.doc":  "/document2.doc",
 				})
 				ctx.SetValues(map[string][]string{
 					"pdfa": {
-						gotenberg.PdfA1a,
-					},
-					"nativePdfFormats": {
-						"false",
-					},
-				})
-				return ctx
-			}(),
-			libreOffice: &libreofficeapi.ApiMock{
-				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return nil
-				},
-				ExtensionsMock: func() []string {
-					return []string{".docx"}
-				},
-			},
-			engine: &gotenberg.PdfEngineMock{
-				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-					return nil
-				},
-			},
-			expectError:            false,
-			expectHttpError:        false,
-			expectOutputPathsCount: 1,
-		},
-		{
-			scenario: "success with every non-native PDF/A & PDF/UA form fields (single file)",
-			ctx: func() *api.ContextMock {
-				ctx := &api.ContextMock{Context: new(api.Context)}
-				ctx.SetFiles(map[string]string{
-					"document.docx": "/document.docx",
-				})
-				ctx.SetValues(map[string][]string{
-					"nativePdfA1aFormat": {
-						"true",
-					},
-					"pdfFormat": {
-						gotenberg.PdfA1a,
-					},
-					"nativePdfFormat": {
-						gotenberg.PdfA1a,
-					},
-					"pdfa": {
-						gotenberg.PdfA1a,
+						gotenberg.PdfA1b,
 					},
 					"pdfua": {
 						"true",
@@ -268,6 +537,59 @@ func TestConvertRoute(t *testing.T) {
 					"nativePdfFormats": {
 						"false",
 					},
+					"metadata": {
+						"{\"Creator\": \"foo\", \"Producer\": \"bar\" }",
+					},
+					"flatten": {
+						"true",
+					},
+				})
+				ctx.SetPathRename(&gotenberg.PathRenameMock{RenameMock: func(oldpath, newpath string) error {
+					return nil
+				}})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return nil
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx", ".doc"}
+				},
+			},
+			engine: &gotenberg.PdfEngineMock{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+					return nil
+				},
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					return nil
+				},
+				WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+					return nil
+				},
+				FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+					return nil
+				},
+			},
+			expectError:            false,
+			expectHttpError:        false,
+			expectOutputPathsCount: 3,
+			expectOutputPaths:      []string{"/document.docx.pdf", "/document2.docx.pdf", "/document2.doc.pdf"},
+		},
+		{
+			scenario: "success with native PDF/A & PDF/UA",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx": "/document.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"pdfa": {
+						gotenberg.PdfA1b,
+					},
+					"pdfua": {
+						"true",
+					},
 				})
 				return ctx
 			}(),
@@ -279,17 +601,12 @@ func TestConvertRoute(t *testing.T) {
 					return []string{".docx"}
 				},
 			},
-			engine: &gotenberg.PdfEngineMock{
-				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-					return nil
-				},
-			},
 			expectError:            false,
 			expectHttpError:        false,
 			expectOutputPathsCount: 1,
 		},
 		{
-			scenario: "merge error",
+			scenario: "success with split (many files)",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
@@ -297,46 +614,11 @@ func TestConvertRoute(t *testing.T) {
 					"document2.docx": "/document2.docx",
 				})
 				ctx.SetValues(map[string][]string{
-					"merge": {
-						"true",
+					"splitMode": {
+						gotenberg.SplitModeIntervals,
 					},
-				})
-				return ctx
-			}(),
-			libreOffice: &libreofficeapi.ApiMock{
-				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return nil
-				},
-				ExtensionsMock: func() []string {
-					return []string{".docx"}
-				},
-			},
-			engine: &gotenberg.PdfEngineMock{
-				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					return errors.New("foo")
-				},
-			},
-			expectError:            true,
-			expectHttpError:        false,
-			expectOutputPathsCount: 0,
-		},
-		{
-			scenario: "ErrPdfFormatNotSupported (merge)",
-			ctx: func() *api.ContextMock {
-				ctx := &api.ContextMock{Context: new(api.Context)}
-				ctx.SetFiles(map[string]string{
-					"document.docx":  "/document.docx",
-					"document2.docx": "/document2.docx",
-				})
-				ctx.SetValues(map[string][]string{
-					"merge": {
-						"true",
-					},
-					"pdfa": {
-						"foo",
-					},
-					"nativePdfFormats": {
-						"false",
+					"splitSpan": {
+						"1",
 					},
 				})
 				return ctx
@@ -353,123 +635,28 @@ func TestConvertRoute(t *testing.T) {
 				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 					return nil
 				},
-				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-					return gotenberg.ErrPdfFormatNotSupported
-				},
-			},
-			expectError:            true,
-			expectHttpError:        true,
-			expectHttpStatus:       http.StatusBadRequest,
-			expectOutputPathsCount: 0,
-		},
-		{
-			scenario: "PDF engine convert error (merge)",
-			ctx: func() *api.ContextMock {
-				ctx := &api.ContextMock{Context: new(api.Context)}
-				ctx.SetFiles(map[string]string{
-					"document.docx":  "/document.docx",
-					"document2.docx": "/document2.docx",
-				})
-				ctx.SetValues(map[string][]string{
-					"merge": {
-						"true",
-					},
-					"pdfa": {
-						gotenberg.PdfA1a,
-					},
-					"nativePdfFormats": {
-						"false",
-					},
-				})
-				return ctx
-			}(),
-			libreOffice: &libreofficeapi.ApiMock{
-				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return nil
-				},
-				ExtensionsMock: func() []string {
-					return []string{".docx"}
-				},
-			},
-			engine: &gotenberg.PdfEngineMock{
-				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					return nil
-				},
-				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-					return errors.New("foo")
-				},
-			},
-			expectError:            true,
-			expectHttpError:        false,
-			expectOutputPathsCount: 0,
-		},
-		{
-			scenario: "cannot add output paths (merge)",
-			ctx: func() *api.ContextMock {
-				ctx := &api.ContextMock{Context: new(api.Context)}
-				ctx.SetFiles(map[string]string{
-					"document.docx":  "/document.docx",
-					"document2.docx": "/document2.docx",
-				})
-				ctx.SetValues(map[string][]string{
-					"merge": {
-						"true",
-					},
-				})
-				ctx.SetCancelled(true)
-				return ctx
-			}(),
-			libreOffice: &libreofficeapi.ApiMock{
-				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return nil
-				},
-				ExtensionsMock: func() []string {
-					return []string{".docx"}
-				},
-			},
-			engine: &gotenberg.PdfEngineMock{
-				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					return nil
-				},
-			},
-			expectError:            true,
-			expectHttpError:        false,
-			expectOutputPathsCount: 0,
-		},
-		{
-			scenario: "success (merge)",
-			ctx: func() *api.ContextMock {
-				ctx := &api.ContextMock{Context: new(api.Context)}
-				ctx.SetFiles(map[string]string{
-					"document.docx":  "/document.docx",
-					"document2.docx": "/document2.docx",
-				})
-				ctx.SetValues(map[string][]string{
-					"merge": {
-						"true",
-					},
-				})
-				return ctx
-			}(),
-			libreOffice: &libreofficeapi.ApiMock{
-				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
-					return nil
-				},
-				ExtensionsMock: func() []string {
-					return []string{".docx"}
-				},
-			},
-			engine: &gotenberg.PdfEngineMock{
-				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					return nil
+				SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+					inputPathNoExt := inputPath[:len(inputPath)-len(filepath.Ext(inputPath))]
+					filenameNoExt := filepath.Base(inputPathNoExt)
+					return []string{
+						fmt.Sprintf(
+							"%s/%s_%d.pdf",
+							outputDirPath, filenameNoExt, 0,
+						),
+						fmt.Sprintf(
+							"%s/%s_%d.pdf",
+							outputDirPath, filenameNoExt, 1,
+						),
+					}, nil
 				},
 			},
 			expectError:            false,
 			expectHttpError:        false,
-			expectOutputPathsCount: 1,
+			expectOutputPathsCount: 4,
+			expectOutputPaths:      []string{"/document_docx/document.docx_0.pdf", "/document_docx/document.docx_1.pdf", "/document2_docx/document2.docx_0.pdf", "/document2_docx/document2.docx_1.pdf"},
 		},
 		{
-			scenario: "success with non-native PDF/A (merge)",
+			scenario: "success with merge and split",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetFiles(map[string]string{
@@ -480,11 +667,11 @@ func TestConvertRoute(t *testing.T) {
 					"merge": {
 						"true",
 					},
-					"pdfa": {
-						gotenberg.PdfA1a,
+					"splitMode": {
+						gotenberg.SplitModeIntervals,
 					},
-					"nativePdfFormats": {
-						"false",
+					"splitSpan": {
+						"1",
 					},
 				})
 				return ctx
@@ -501,17 +688,90 @@ func TestConvertRoute(t *testing.T) {
 				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 					return nil
 				},
+				SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+					inputPathNoExt := inputPath[:len(inputPath)-len(filepath.Ext(inputPath))]
+					filenameNoExt := filepath.Base(inputPathNoExt)
+					return []string{
+						fmt.Sprintf(
+							"%s/%s_%d.pdf",
+							outputDirPath, filenameNoExt, 0,
+						),
+						fmt.Sprintf(
+							"%s/%s_%d.pdf",
+							outputDirPath, filenameNoExt, 1,
+						),
+					}, nil
+				},
+			},
+			expectError:            false,
+			expectHttpError:        false,
+			expectOutputPathsCount: 2,
+		},
+		{
+			scenario: "success with split and native PDF/A & PDF/UA (many files)",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetFiles(map[string]string{
+					"document.docx":  "/document.docx",
+					"document2.docx": "/document2.docx",
+				})
+				ctx.SetValues(map[string][]string{
+					"splitMode": {
+						gotenberg.SplitModeIntervals,
+					},
+					"splitSpan": {
+						"1",
+					},
+					"pdfa": {
+						gotenberg.PdfA1b,
+					},
+					"pdfua": {
+						"true",
+					},
+				})
+				return ctx
+			}(),
+			libreOffice: &libreofficeapi.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options libreofficeapi.Options) error {
+					return nil
+				},
+				ExtensionsMock: func() []string {
+					return []string{".docx"}
+				},
+			},
+			engine: &gotenberg.PdfEngineMock{
+				SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+					inputPathNoExt := inputPath[:len(inputPath)-len(filepath.Ext(inputPath))]
+					filenameNoExt := filepath.Base(inputPathNoExt)
+					return []string{
+						fmt.Sprintf(
+							"%s/%s_%d.pdf",
+							outputDirPath, filenameNoExt, 0,
+						),
+						fmt.Sprintf(
+							"%s/%s_%d.pdf",
+							outputDirPath, filenameNoExt, 1,
+						),
+					}, nil
+				},
 				ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
 					return nil
 				},
 			},
 			expectError:            false,
 			expectHttpError:        false,
-			expectOutputPathsCount: 1,
+			expectOutputPathsCount: 4,
+			expectOutputPaths:      []string{"/document_docx/document.docx_0.pdf", "/document_docx/document.docx_1.pdf", "/document2_docx/document2.docx_0.pdf", "/document2_docx/document2.docx_1.pdf"},
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			tc.ctx.SetLogger(zap.NewNop())
+			tc.ctx.SetMkdirAll(&gotenberg.MkdirAllMock{MkdirAllMock: func(path string, perm os.FileMode) error {
+				return nil
+			}})
+			tc.ctx.SetPathRename(&gotenberg.PathRenameMock{RenameMock: func(oldpath, newpath string) error {
+				return nil
+			}})
 			c := echo.New().NewContext(nil, nil)
 			c.Set("context", tc.ctx.Context)
 
@@ -546,6 +806,12 @@ func TestConvertRoute(t *testing.T) {
 			if tc.expectOutputPathsCount != len(tc.ctx.OutputPaths()) {
 				t.Errorf("expected %d output paths but got %d", tc.expectOutputPathsCount, len(tc.ctx.OutputPaths()))
 			}
+
+			for _, path := range tc.expectOutputPaths {
+				if !slices.Contains(tc.ctx.OutputPaths(), path) {
+					t.Errorf("expected '%s' in output paths %v", path, tc.ctx.OutputPaths())
+				}
+			}
 		})
 	}
 }

pkg/modules/logging/logging.go

@@ -11,7 +11,7 @@ import (
 	"go.uber.org/zap/zapcore"
 	"golang.org/x/term"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
@@ -174,7 +174,7 @@ func newLogEncoder(format string) (zapcore.Encoder, error) {
 		// If interactive terminal, make output more human-readable by default.
 		// Credits: https://github.com/caddyserver/caddy/blob/v2.1.1/logging.go#L671.
 		encCfg.EncodeTime = func(ts time.Time, encoder zapcore.PrimitiveArrayEncoder) {
-			encoder.AppendString(ts.UTC().Format("2006/01/02 15:04:05.000"))
+			encoder.AppendString(ts.Local().Format("2006/01/02 15:04:05.000"))
 		}
 
 		if format == textLoggingFormat || format == autoLoggingFormat {

pkg/modules/logging/logging_test.go

@@ -9,7 +9,7 @@ import (
 	"go.uber.org/zap/zapcore"
 	"go.uber.org/zap/zaptest/observer"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestLogging_Descriptor(t *testing.T) {

pkg/modules/pdfcpu/doc.go

@@ -1,6 +1,8 @@
 // Package pdfcpu provides an implementation of the gotenberg.PdfEngine
-// interface using the pdfcpu library. This package allows for the merging of
-// PDF files but does not support conversion to specific PDF formats.
+// interface using the pdfcpu command-line tool. This package allows for:
+//
+// 1. The merging of PDF files.
+// 2. The splitting of PDF files.
 //
 // See: https://github.com/pdfcpu/pdfcpu.
 package pdfcpu

pkg/modules/pdfcpu/pdfcpu.go

@@ -2,24 +2,24 @@ package pdfcpu
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"os"
+	"path/filepath"
 
-	pdfcpuAPI "github.com/pdfcpu/pdfcpu/pkg/api"
-	pdfcpuLog "github.com/pdfcpu/pdfcpu/pkg/log"
-	pdfcpuConfig "github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
 	gotenberg.MustRegisterModule(new(PdfCpu))
 }
 
-// PdfCpu abstracts the pdfcpu library and implements the [gotenberg.PdfEngine]
-// interface.
+// PdfCpu abstracts the CLI tool pdfcpu and implements the
+// [gotenberg.PdfEngine] interface.
 type PdfCpu struct {
-	conf *pdfcpuConfig.Configuration
+	binPath string
 }
 
 // Descriptor returns a [PdfCpu]'s module descriptor.
@@ -32,31 +32,105 @@ func (engine *PdfCpu) Descriptor() gotenberg.ModuleDescriptor {
 
 // Provision sets the engine properties.
 func (engine *PdfCpu) Provision(ctx *gotenberg.Context) error {
-	pdfcpuConfig.ConfigPath = "disable"
-	pdfcpuLog.DisableLoggers()
-	engine.conf = pdfcpuConfig.NewDefaultConfiguration()
+	binPath, ok := os.LookupEnv("PDFCPU_BIN_PATH")
+	if !ok {
+		return errors.New("PDFCPU_BIN_PATH environment variable is not set")
+	}
+
+	engine.binPath = binPath
+
+	return nil
+}
+
+// Validate validates the module properties.
+func (engine *PdfCpu) Validate() error {
+	_, err := os.Stat(engine.binPath)
+	if os.IsNotExist(err) {
+		return fmt.Errorf("pdfcpu binary path does not exist: %w", err)
+	}
 
 	return nil
 }
 
 // Merge combines multiple PDFs into a single PDF.
 func (engine *PdfCpu) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-	err := pdfcpuAPI.MergeCreateFile(inputPaths, outputPath, engine.conf)
+	var args []string
+	args = append(args, "merge", outputPath)
+	args = append(args, inputPaths...)
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return fmt.Errorf("create command: %w", err)
+	}
+
+	_, err = cmd.Exec()
 	if err == nil {
 		return nil
 	}
 
-	return fmt.Errorf("merge PDFs with PDFcpu: %w", err)
+	return fmt.Errorf("merge PDFs with pdfcpu: %w", err)
+}
+
+// Split splits a given PDF file.
+func (engine *PdfCpu) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	var args []string
+
+	switch mode.Mode {
+	case gotenberg.SplitModeIntervals:
+		args = append(args, "split", "-mode", "span", inputPath, outputDirPath, mode.Span)
+	case gotenberg.SplitModePages:
+		if mode.Unify {
+			outputPath := fmt.Sprintf("%s/%s", outputDirPath, filepath.Base(inputPath))
+			args = append(args, "trim", "-pages", mode.Span, inputPath, outputPath)
+			break
+		}
+		args = append(args, "extract", "-mode", "page", "-pages", mode.Span, inputPath, outputDirPath)
+	default:
+		return nil, fmt.Errorf("split PDFs using mode '%s' with pdfcpu: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
+	}
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return nil, fmt.Errorf("create command: %w", err)
+	}
+
+	_, err = cmd.Exec()
+	if err != nil {
+		return nil, fmt.Errorf("split PDFs with pdfcpu: %w", err)
+	}
+
+	outputPaths, err := gotenberg.WalkDir(outputDirPath, ".pdf")
+	if err != nil {
+		return nil, fmt.Errorf("walk directory to find resulting PDFs from split with pdfcpu: %w", err)
+	}
+
+	return outputPaths, nil
+}
+
+// Flatten is not available in this implementation.
+func (engine *PdfCpu) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	return fmt.Errorf("flatten PDF with pdfcpu: %w", gotenberg.ErrPdfEngineMethodNotSupported)
 }
 
 // Convert is not available in this implementation.
 func (engine *PdfCpu) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-	return fmt.Errorf("convert PDF to '%+v' with PDFcpu: %w", formats, gotenberg.ErrPdfEngineMethodNotSupported)
+	return fmt.Errorf("convert PDF to '%+v' with pdfcpu: %w", formats, gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// ReadMetadata is not available in this implementation.
+func (engine *PdfCpu) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	return nil, fmt.Errorf("read PDF metadata with pdfcpu: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// WriteMetadata is not available in this implementation.
+func (engine *PdfCpu) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	return fmt.Errorf("write PDF metadata with pdfcpu: %w", gotenberg.ErrPdfEngineMethodNotSupported)
 }
 
 // Interface guards.
 var (
 	_ gotenberg.Module      = (*PdfCpu)(nil)
 	_ gotenberg.Provisioner = (*PdfCpu)(nil)
+	_ gotenberg.Validator   = (*PdfCpu)(nil)
 	_ gotenberg.PdfEngine   = (*PdfCpu)(nil)
 )

pkg/modules/pdfcpu/pdfcpu_test.go

@@ -9,7 +9,7 @@ import (
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestPdfCpu_Descriptor(t *testing.T) {
@@ -33,55 +33,32 @@ func TestPdfCpu_Provision(t *testing.T) {
 	}
 }
 
-func TestPdfCpu_Merge(t *testing.T) {
+func TestPdfCpu_Validate(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
-		inputPaths  []string
+		binPath     string
 		expectError bool
 	}{
 		{
-			scenario: "invalid input path",
-			inputPaths: []string{
-				"foo",
-			},
+			scenario:    "empty bin path",
+			binPath:     "",
 			expectError: true,
 		},
 		{
-			scenario: "single file success",
-			inputPaths: []string{
-				"/tests/test/testdata/pdfengines/sample1.pdf",
-			},
-			expectError: false,
+			scenario:    "bin path does not exist",
+			binPath:     "/foo",
+			expectError: true,
 		},
 		{
-			scenario: "many files success",
-			inputPaths: []string{
-				"/tests/test/testdata/pdfengines/sample1.pdf",
-				"/tests/test/testdata/pdfengines/sample2.pdf",
-			},
+			scenario:    "validate success",
+			binPath:     os.Getenv("PDFTK_BIN_PATH"),
+			expectError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			engine := new(PdfCpu)
-			err := engine.Provision(nil)
-			if err != nil {
-				t.Fatalf("expected error but got: %v", err)
-			}
-
-			fs := gotenberg.NewFileSystem()
-			outputDir, err := fs.MkdirAll()
-			if err != nil {
-				t.Fatalf("expected error but got: %v", err)
-			}
-
-			defer func() {
-				err = os.RemoveAll(fs.WorkingDirPath())
-				if err != nil {
-					t.Fatalf("expected no error while cleaning up but got: %v", err)
-				}
-			}()
-
-			err = engine.Merge(nil, nil, tc.inputPaths, outputDir+"/foo.pdf")
+			engine.binPath = tc.binPath
+			err := engine.Validate()
 
 			if !tc.expectError && err != nil {
 				t.Fatalf("expected no error but got: %v", err)
@@ -94,6 +71,183 @@ func TestPdfCpu_Merge(t *testing.T) {
 	}
 }
 
+func TestPdfCpu_Merge(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		ctx         context.Context
+		inputPaths  []string
+		expectError bool
+	}{
+		{
+			scenario:    "invalid context",
+			ctx:         nil,
+			expectError: true,
+		},
+		{
+			scenario: "invalid input path",
+			ctx:      context.TODO(),
+			inputPaths: []string{
+				"foo",
+			},
+			expectError: true,
+		},
+		{
+			scenario: "single file success",
+			ctx:      context.TODO(),
+			inputPaths: []string{
+				"/tests/test/testdata/pdfengines/sample1.pdf",
+			},
+			expectError: false,
+		},
+		{
+			scenario: "many files success",
+			ctx:      context.TODO(),
+			inputPaths: []string{
+				"/tests/test/testdata/pdfengines/sample1.pdf",
+				"/tests/test/testdata/pdfengines/sample2.pdf",
+			},
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(PdfCpu)
+			err := engine.Provision(nil)
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+			outputDir, err := fs.MkdirAll()
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			defer func() {
+				err = os.RemoveAll(fs.WorkingDirPath())
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up but got: %v", err)
+				}
+			}()
+
+			err = engine.Merge(tc.ctx, zap.NewNop(), tc.inputPaths, outputDir+"/foo.pdf")
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
+func TestPdfCpu_Split(t *testing.T) {
+	for _, tc := range []struct {
+		scenario               string
+		ctx                    context.Context
+		mode                   gotenberg.SplitMode
+		inputPath              string
+		expectError            bool
+		expectedError          error
+		expectOutputPathsCount int
+	}{
+		{
+			scenario:               "ErrPdfSplitModeNotSupported",
+			expectError:            true,
+			expectedError:          gotenberg.ErrPdfSplitModeNotSupported,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "invalid context",
+			ctx:                    nil,
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModeIntervals, Span: "1"},
+			expectError:            true,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "invalid input path",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModeIntervals, Span: "1"},
+			inputPath:              "",
+			expectError:            true,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "success (intervals)",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModeIntervals, Span: "1"},
+			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			expectError:            false,
+			expectOutputPathsCount: 3,
+		},
+		{
+			scenario:               "success (pages)",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1"},
+			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			expectError:            false,
+			expectOutputPathsCount: 1,
+		},
+		{
+			scenario:               "success (pages & unify)",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1-2", Unify: true},
+			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			expectError:            false,
+			expectOutputPathsCount: 1,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(PdfCpu)
+			err := engine.Provision(nil)
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+			outputDir, err := fs.MkdirAll()
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			defer func() {
+				err = os.RemoveAll(fs.WorkingDirPath())
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up but got: %v", err)
+				}
+			}()
+
+			outputPaths, err := engine.Split(tc.ctx, zap.NewNop(), tc.mode, tc.inputPath, outputDir)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectedError != nil && !errors.Is(err, tc.expectedError) {
+				t.Fatalf("expected error %v but got: %v", tc.expectedError, err)
+			}
+
+			if tc.expectOutputPathsCount != len(outputPaths) {
+				t.Errorf("expected %d output paths but got %d", tc.expectOutputPathsCount, len(outputPaths))
+			}
+		})
+	}
+}
+
+func TestPdfCpu_Flatten(t *testing.T) {
+	mod := new(PdfCpu)
+	err := mod.Flatten(context.TODO(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
 func TestPdfCpu_Convert(t *testing.T) {
 	mod := new(PdfCpu)
 	err := mod.Convert(context.TODO(), zap.NewNop(), gotenberg.PdfFormats{}, "", "")
@@ -102,3 +256,21 @@ func TestPdfCpu_Convert(t *testing.T) {
 		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
 	}
 }
+
+func TestLibreOfficePdfEngine_ReadMetadata(t *testing.T) {
+	engine := new(PdfCpu)
+	_, err := engine.ReadMetadata(context.Background(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestLibreOfficePdfEngine_WriteMetadata(t *testing.T) {
+	engine := new(PdfCpu)
+	err := engine.WriteMetadata(context.Background(), zap.NewNop(), nil, "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}

pkg/modules/pdfengines/multi.go

@@ -3,20 +3,38 @@ package pdfengines
 import (
 	"context"
 	"fmt"
+	"sync"
 
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 type multiPdfEngines struct {
-	engines []gotenberg.PdfEngine
+	mergeEngines         []gotenberg.PdfEngine
+	splitEngines         []gotenberg.PdfEngine
+	flattenEngines       []gotenberg.PdfEngine
+	convertEngines       []gotenberg.PdfEngine
+	readMetadataEngines  []gotenberg.PdfEngine
+	writeMetadataEngines []gotenberg.PdfEngine
 }
 
-func newMultiPdfEngines(engines ...gotenberg.PdfEngine) *multiPdfEngines {
+func newMultiPdfEngines(
+	mergeEngines,
+	splitEngines,
+	flattenEngines,
+	convertEngines,
+	readMetadataEngines,
+	writeMetadataEngines []gotenberg.PdfEngine,
+) *multiPdfEngines {
 	return &multiPdfEngines{
-		engines: engines,
+		mergeEngines:         mergeEngines,
+		splitEngines:         splitEngines,
+		flattenEngines:       flattenEngines,
+		convertEngines:       convertEngines,
+		readMetadataEngines:  readMetadataEngines,
+		writeMetadataEngines: writeMetadataEngines,
 	}
 }
 
@@ -26,7 +44,7 @@ func (multi *multiPdfEngines) Merge(ctx context.Context, logger *zap.Logger, inp
 	var err error
 	errChan := make(chan error, 1)
 
-	for _, engine := range multi.engines {
+	for _, engine := range multi.mergeEngines {
 		go func(engine gotenberg.PdfEngine) {
 			errChan <- engine.Merge(ctx, logger, inputPaths, outputPath)
 		}(engine)
@@ -45,13 +63,76 @@ func (multi *multiPdfEngines) Merge(ctx context.Context, logger *zap.Logger, inp
 	return fmt.Errorf("merge PDFs with multi PDF engines: %w", err)
 }
 
+type splitResult struct {
+	outputPaths []string
+	err         error
+}
+
+// Split tries to split at intervals a given PDF thanks to its children. If the
+// context is done, it stops and returns an error.
+func (multi *multiPdfEngines) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	var err error
+	var mu sync.Mutex // to safely append errors.
+
+	resultChan := make(chan splitResult, len(multi.splitEngines))
+
+	for _, engine := range multi.splitEngines {
+		go func(engine gotenberg.PdfEngine) {
+			outputPaths, err := engine.Split(ctx, logger, mode, inputPath, outputDirPath)
+			resultChan <- splitResult{outputPaths: outputPaths, err: err}
+		}(engine)
+	}
+
+	for range multi.splitEngines {
+		select {
+		case result := <-resultChan:
+			if result.err != nil {
+				mu.Lock()
+				err = multierr.Append(err, result.err)
+				mu.Unlock()
+			} else {
+				return result.outputPaths, nil
+			}
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		}
+	}
+
+	return nil, fmt.Errorf("split PDF with multi PDF engines: %w", err)
+}
+
+// Flatten merges existing annotation appearances with page content, thanks to
+// its children. If the context is done, it stops and returns an error
+func (multi *multiPdfEngines) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	var err error
+	errChan := make(chan error, 1)
+
+	for _, engine := range multi.flattenEngines {
+		go func(engine gotenberg.PdfEngine) {
+			errChan <- engine.Flatten(ctx, logger, inputPath)
+		}(engine)
+
+		select {
+		case mergeErr := <-errChan:
+			errored := multierr.AppendInto(&err, mergeErr)
+			if !errored {
+				return nil
+			}
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	}
+
+	return fmt.Errorf("flatten PDF with multi PDF engines: %w", err)
+}
+
 // Convert converts the given PDF to a specific PDF format. thanks to its
 // children. If the context is done, it stops and returns an error.
 func (multi *multiPdfEngines) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
 	var err error
 	errChan := make(chan error, 1)
 
-	for _, engine := range multi.engines {
+	for _, engine := range multi.convertEngines {
 		go func(engine gotenberg.PdfEngine) {
 			errChan <- engine.Convert(ctx, logger, formats, inputPath, outputPath)
 		}(engine)
@@ -70,6 +151,65 @@ func (multi *multiPdfEngines) Convert(ctx context.Context, logger *zap.Logger, f
 	return fmt.Errorf("convert PDF to '%+v' with multi PDF engines: %w", formats, err)
 }
 
+type readMetadataResult struct {
+	metadata map[string]interface{}
+	err      error
+}
+
+func (multi *multiPdfEngines) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	var err error
+	var mu sync.Mutex // to safely append errors.
+
+	resultChan := make(chan readMetadataResult, len(multi.readMetadataEngines))
+
+	for _, engine := range multi.readMetadataEngines {
+		go func(engine gotenberg.PdfEngine) {
+			metadata, err := engine.ReadMetadata(ctx, logger, inputPath)
+			resultChan <- readMetadataResult{metadata: metadata, err: err}
+		}(engine)
+	}
+
+	for range multi.readMetadataEngines {
+		select {
+		case result := <-resultChan:
+			if result.err != nil {
+				mu.Lock()
+				err = multierr.Append(err, result.err)
+				mu.Unlock()
+			} else {
+				return result.metadata, nil
+			}
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		}
+	}
+
+	return nil, fmt.Errorf("read PDF metadata with multi PDF engines: %w", err)
+}
+
+func (multi *multiPdfEngines) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	var err error
+	errChan := make(chan error, 1)
+
+	for _, engine := range multi.writeMetadataEngines {
+		go func(engine gotenberg.PdfEngine) {
+			errChan <- engine.WriteMetadata(ctx, logger, metadata, inputPath)
+		}(engine)
+
+		select {
+		case writeMetadataErr := <-errChan:
+			errored := multierr.AppendInto(&err, writeMetadataErr)
+			if !errored {
+				return nil
+			}
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	}
+
+	return fmt.Errorf("write PDF metadata with multi PDF engines: %w", err)
+}
+
 // Interface guards.
 var (
 	_ gotenberg.PdfEngine = (*multiPdfEngines)(nil)

pkg/modules/pdfengines/multi_test.go

@@ -7,7 +7,7 @@ import (
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestMultiPdfEngines_Merge(t *testing.T) {
@@ -19,59 +19,67 @@ func TestMultiPdfEngines_Merge(t *testing.T) {
 	}{
 		{
 			scenario: "nominal behavior",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						return nil
+			engine: &multiPdfEngines{
+				mergeEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return nil
+						},
 					},
 				},
-			),
+			},
 			ctx:         context.Background(),
 			expectError: false,
 		},
 		{
 			scenario: "at least one engine does not return an error",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						return errors.New("foo")
+			engine: &multiPdfEngines{
+				mergeEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return nil
+						},
 					},
 				},
-				&gotenberg.PdfEngineMock{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						return nil
-					},
-				},
-			),
+			},
 			ctx:         context.Background(),
 			expectError: false,
 		},
 		{
 			scenario: "all engines return an error",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						return errors.New("foo")
+			engine: &multiPdfEngines{
+				mergeEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return errors.New("foo")
+						},
 					},
 				},
-				&gotenberg.PdfEngineMock{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						return errors.New("foo")
-					},
-				},
-			),
+			},
 			ctx:         context.Background(),
 			expectError: true,
 		},
 		{
 			scenario: "context expired",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						return nil
+			engine: &multiPdfEngines{
+				mergeEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return nil
+						},
 					},
 				},
-			),
+			},
 			ctx: func() context.Context {
 				ctx, cancel := context.WithCancel(context.Background())
 				cancel()
@@ -95,6 +103,188 @@ func TestMultiPdfEngines_Merge(t *testing.T) {
 	}
 }
 
+func TestMultiPdfEngines_Split(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *multiPdfEngines
+		ctx         context.Context
+		expectError bool
+	}{
+		{
+			scenario: "nominal behavior",
+			engine: &multiPdfEngines{
+				splitEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+							return nil, nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "at least one engine does not return an error",
+			engine: &multiPdfEngines{
+				splitEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+							return nil, errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+							return nil, nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "all engines return an error",
+			engine: &multiPdfEngines{
+				splitEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+							return nil, errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+							return nil, errors.New("foo")
+						},
+					},
+				},
+			},
+			ctx:         context.Background(),
+			expectError: true,
+		},
+		{
+			scenario: "context expired",
+			engine: &multiPdfEngines{
+				splitEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						SplitMock: func(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+							return nil, nil
+						},
+					},
+				},
+			},
+			ctx: func() context.Context {
+				ctx, cancel := context.WithCancel(context.Background())
+				cancel()
+
+				return ctx
+			}(),
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			_, err := tc.engine.Split(tc.ctx, zap.NewNop(), gotenberg.SplitMode{}, "", "")
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
+func TestMultiPdfEngines_Flatten(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *multiPdfEngines
+		ctx         context.Context
+		expectError bool
+	}{
+		{
+			scenario: "nominal behavior",
+			engine: &multiPdfEngines{
+				flattenEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+							return nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "at least one engine does not return an error",
+			engine: &multiPdfEngines{
+				flattenEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+							return nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "all engines return an error",
+			engine: &multiPdfEngines{
+				flattenEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+							return errors.New("foo")
+						},
+					},
+				},
+			},
+			ctx:         context.Background(),
+			expectError: true,
+		},
+		{
+			scenario: "context expired",
+			engine: &multiPdfEngines{
+				flattenEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						FlattenMock: func(ctx context.Context, logger *zap.Logger, inputPath string) error {
+							return nil
+						},
+					},
+				},
+			},
+			ctx: func() context.Context {
+				ctx, cancel := context.WithCancel(context.Background())
+				cancel()
+
+				return ctx
+			}(),
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			err := tc.engine.Flatten(tc.ctx, zap.NewNop(), "")
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
 func TestMultiPdfEngines_Convert(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
@@ -104,57 +294,65 @@ func TestMultiPdfEngines_Convert(t *testing.T) {
 	}{
 		{
 			scenario: "nominal behavior",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-						return nil
+			engine: &multiPdfEngines{
+				convertEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return nil
+						},
 					},
 				},
-			),
+			},
 			ctx: context.Background(),
 		},
 		{
 			scenario: "at least one engine does not return an error",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-						return errors.New("foo")
+			engine: &multiPdfEngines{
+				convertEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return nil
+						},
 					},
 				},
-				&gotenberg.PdfEngineMock{
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-						return nil
-					},
-				},
-			),
+			},
 			ctx: context.Background(),
 		},
 		{
 			scenario: "all engines return an error",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-						return errors.New("foo")
+			engine: &multiPdfEngines{
+				convertEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return errors.New("foo")
+						},
 					},
 				},
-				&gotenberg.PdfEngineMock{
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-						return errors.New("foo")
-					},
-				},
-			),
+			},
 			ctx:         context.Background(),
 			expectError: true,
 		},
 		{
 			scenario: "context expired",
-			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-						return nil
+			engine: &multiPdfEngines{
+				convertEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return nil
+						},
 					},
 				},
-			),
+			},
 			ctx: func() context.Context {
 				ctx, cancel := context.WithCancel(context.Background())
 				cancel()
@@ -177,3 +375,185 @@ func TestMultiPdfEngines_Convert(t *testing.T) {
 		})
 	}
 }
+
+func TestMultiPdfEngines_ReadMetadata(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *multiPdfEngines
+		ctx         context.Context
+		expectError bool
+	}{
+		{
+			scenario: "nominal behavior",
+			engine: &multiPdfEngines{
+				readMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return make(map[string]interface{}), nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "at least one engine does not return an error",
+			engine: &multiPdfEngines{
+				readMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return nil, errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return make(map[string]interface{}), nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "all engines return an error",
+			engine: &multiPdfEngines{
+				readMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return nil, errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return nil, errors.New("foo")
+						},
+					},
+				},
+			},
+			ctx:         context.Background(),
+			expectError: true,
+		},
+		{
+			scenario: "context expired",
+			engine: &multiPdfEngines{
+				readMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return make(map[string]interface{}), nil
+						},
+					},
+				},
+			},
+			ctx: func() context.Context {
+				ctx, cancel := context.WithCancel(context.Background())
+				cancel()
+
+				return ctx
+			}(),
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			_, err := tc.engine.ReadMetadata(tc.ctx, zap.NewNop(), "")
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
+func TestMultiPdfEngines_WriteMetadata(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *multiPdfEngines
+		ctx         context.Context
+		expectError bool
+	}{
+		{
+			scenario: "nominal behavior",
+			engine: &multiPdfEngines{
+				writeMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "at least one engine does not return an error",
+			engine: &multiPdfEngines{
+				writeMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return nil
+						},
+					},
+				},
+			},
+			ctx: context.Background(),
+		},
+		{
+			scenario: "all engines return an error",
+			engine: &multiPdfEngines{
+				writeMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return errors.New("foo")
+						},
+					},
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return errors.New("foo")
+						},
+					},
+				},
+			},
+			ctx:         context.Background(),
+			expectError: true,
+		},
+		{
+			scenario: "context expired",
+			engine: &multiPdfEngines{
+				writeMetadataEngines: []gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return nil
+						},
+					},
+				},
+			},
+			ctx: func() context.Context {
+				ctx, cancel := context.WithCancel(context.Background())
+				cancel()
+
+				return ctx
+			}(),
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			err := tc.engine.WriteMetadata(tc.ctx, zap.NewNop(), nil, "")
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}

pkg/modules/pdfengines/pdfengines.go

@@ -7,8 +7,8 @@ import (
 
 	flag "github.com/spf13/pflag"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
 )
 
 func init() {
@@ -27,9 +27,14 @@ func init() {
 // the [api.Router] interface to expose relevant PDF processing routes if
 // enabled.
 type PdfEngines struct {
-	names         []string
-	engines       []gotenberg.PdfEngine
-	disableRoutes bool
+	mergeNames         []string
+	splitNames         []string
+	flattenNames       []string
+	convertNames       []string
+	readMetadataNames  []string
+	writeMetadataNames []string
+	engines            []gotenberg.PdfEngine
+	disableRoutes      bool
 }
 
 // Descriptor returns a PdfEngines' module descriptor.
@@ -38,9 +43,20 @@ func (mod *PdfEngines) Descriptor() gotenberg.ModuleDescriptor {
 		ID: "pdfengines",
 		FlagSet: func() *flag.FlagSet {
 			fs := flag.NewFlagSet("pdfengines", flag.ExitOnError)
-			fs.StringSlice("pdfengines-engines", make([]string, 0), "Set the PDF engines and their order - all by default")
+			fs.StringSlice("pdfengines-merge-engines", []string{"qpdf", "pdfcpu", "pdftk"}, "Set the PDF engines and their order for the merge feature - empty means all")
+			fs.StringSlice("pdfengines-split-engines", []string{"pdfcpu", "qpdf", "pdftk"}, "Set the PDF engines and their order for the split feature - empty means all")
+			fs.StringSlice("pdfengines-flatten-engines", []string{"qpdf"}, "Set the PDF engines and their order for the flatten feature - empty means all")
+			fs.StringSlice("pdfengines-convert-engines", []string{"libreoffice-pdfengine"}, "Set the PDF engines and their order for the convert feature - empty means all")
+			fs.StringSlice("pdfengines-read-metadata-engines", []string{"exiftool"}, "Set the PDF engines and their order for the read metadata feature - empty means all")
+			fs.StringSlice("pdfengines-write-metadata-engines", []string{"exiftool"}, "Set the PDF engines and their order for the write metadata feature - empty means all")
 			fs.Bool("pdfengines-disable-routes", false, "Disable the routes")
 
+			fs.StringSlice("pdfengines-engines", make([]string, 0), "Set the default PDF engines and their default order - all by default")
+			err := fs.MarkDeprecated("pdfengines-engines", "use other flags for a more granular selection of PDF engines per method")
+			if err != nil {
+				panic(err)
+			}
+
 			return fs
 		}(),
 		New: func() gotenberg.Module { return new(PdfEngines) },
@@ -51,21 +67,14 @@ func (mod *PdfEngines) Descriptor() gotenberg.ModuleDescriptor {
 // selected by the user thanks to the "engines" flag.
 func (mod *PdfEngines) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
-	names := flags.MustStringSlice("pdfengines-engines")
+	mergeNames := flags.MustStringSlice("pdfengines-merge-engines")
+	splitNames := flags.MustStringSlice("pdfengines-split-engines")
+	flattenNames := flags.MustStringSlice("pdfengines-flatten-engines")
+	convertNames := flags.MustStringSlice("pdfengines-convert-engines")
+	readMetadataNames := flags.MustStringSlice("pdfengines-read-metadata-engines")
+	writeMetadataNames := flags.MustStringSlice("pdfengines-write-metadata-engines")
 	mod.disableRoutes = flags.MustBool("pdfengines-disable-routes")
 
-	loggerProvider, err := ctx.Module(new(gotenberg.LoggerProvider))
-	if err != nil {
-		return fmt.Errorf("get logger provider: %w", err)
-	}
-
-	logger, err := loggerProvider.(gotenberg.LoggerProvider).Logger(mod)
-	if err != nil {
-		return fmt.Errorf("get logger: %w", err)
-	}
-
-	logger = logger.Named("pdfengines")
-
 	engines, err := ctx.Modules(new(gotenberg.PdfEngine))
 	if err != nil {
 		return fmt.Errorf("get PDF engines: %w", err)
@@ -77,26 +86,47 @@ func (mod *PdfEngines) Provision(ctx *gotenberg.Context) error {
 		mod.engines[i] = engine.(gotenberg.PdfEngine)
 	}
 
-	if len(names) > 0 {
-		// Selection from user.
-		mod.names = names
-
-		for i, name := range names {
-			// FIXME: deprecated.
-			if name == "unoconv-pdfengine" || name == "uno-pdfengine" {
-				logger.Warn(fmt.Sprintf("%s is deprecated; prefer libreoffice-pdfengine instead", name))
-				mod.names[i] = "libreoffice-pdfengine"
-			}
-		}
-
-		return nil
+	defaultNames := make([]string, len(mod.engines))
+	for i, engine := range mod.engines {
+		defaultNames[i] = engine.(gotenberg.Module).Descriptor().ID
 	}
 
-	// No selection from user, use all PDF engines available.
-	mod.names = make([]string, len(mod.engines))
+	// Example in case of deprecated module name.
+	//for i, name := range defaultNames {
+	//	if name == "unoconv-pdfengine" || name == "uno-pdfengine" {
+	//		logger.Warn(fmt.Sprintf("%s is deprecated; prefer libreoffice-pdfengine instead", name))
+	//		mod.defaultNames[i] = "libreoffice-pdfengine"
+	//	}
+	//}
 
-	for i, engine := range mod.engines {
-		mod.names[i] = engine.(gotenberg.Module).Descriptor().ID
+	mod.mergeNames = defaultNames
+	if len(mergeNames) > 0 {
+		mod.mergeNames = mergeNames
+	}
+
+	mod.splitNames = defaultNames
+	if len(splitNames) > 0 {
+		mod.splitNames = splitNames
+	}
+
+	mod.flattenNames = defaultNames
+	if len(flattenNames) > 0 {
+		mod.flattenNames = flattenNames
+	}
+
+	mod.convertNames = defaultNames
+	if len(convertNames) > 0 {
+		mod.convertNames = convertNames
+	}
+
+	mod.readMetadataNames = defaultNames
+	if len(readMetadataNames) > 0 {
+		mod.readMetadataNames = readMetadataNames
+	}
+
+	mod.writeMetadataNames = defaultNames
+	if len(writeMetadataNames) > 0 {
+		mod.writeMetadataNames = writeMetadataNames
 	}
 
 	return nil
@@ -117,22 +147,42 @@ func (mod *PdfEngines) Validate() error {
 	}
 
 	nonExistingEngines := make([]string, 0)
+	findNonExistingEngines := func(names []string) {
+		for _, name := range names {
+			engineExists := false
 
-	for _, name := range mod.names {
-		engineExists := false
+			for _, engine := range mod.engines {
+				if name == engine.(gotenberg.Module).Descriptor().ID {
+					engineExists = true
+					break
+				}
+			}
 
-		for _, engine := range mod.engines {
-			if name == engine.(gotenberg.Module).Descriptor().ID {
-				engineExists = true
-				break
+			if engineExists {
+				continue
+			}
+
+			alreadyInSlice := false
+			for _, engine := range nonExistingEngines {
+				if engine == name {
+					alreadyInSlice = true
+					break
+				}
+			}
+
+			if !alreadyInSlice {
+				nonExistingEngines = append(nonExistingEngines, name)
 			}
 		}
-
-		if !engineExists {
-			nonExistingEngines = append(nonExistingEngines, name)
-		}
 	}
 
+	findNonExistingEngines(mod.mergeNames)
+	findNonExistingEngines(mod.splitNames)
+	findNonExistingEngines(mod.flattenNames)
+	findNonExistingEngines(mod.convertNames)
+	findNonExistingEngines(mod.readMetadataNames)
+	findNonExistingEngines(mod.writeMetadataNames)
+
 	if len(nonExistingEngines) == 0 {
 		return nil
 	}
@@ -144,24 +194,39 @@ func (mod *PdfEngines) Validate() error {
 // modules.
 func (mod *PdfEngines) SystemMessages() []string {
 	return []string{
-		strings.Join(mod.names[:], " "),
+		fmt.Sprintf("merge engines - %s", strings.Join(mod.mergeNames[:], " ")),
+		fmt.Sprintf("split engines - %s", strings.Join(mod.splitNames[:], " ")),
+		fmt.Sprintf("flatten engines - %s", strings.Join(mod.flattenNames[:], " ")),
+		fmt.Sprintf("convert engines - %s", strings.Join(mod.convertNames[:], " ")),
+		fmt.Sprintf("read metadata engines - %s", strings.Join(mod.readMetadataNames[:], " ")),
+		fmt.Sprintf("write metadata engines - %s", strings.Join(mod.writeMetadataNames[:], " ")),
 	}
 }
 
 // PdfEngine returns a [gotenberg.PdfEngine].
 func (mod *PdfEngines) PdfEngine() (gotenberg.PdfEngine, error) {
-	engines := make([]gotenberg.PdfEngine, len(mod.names))
-
-	for i, name := range mod.names {
-		for _, engine := range mod.engines {
-			if name == engine.(gotenberg.Module).Descriptor().ID {
-				engines[i] = engine
-				break
+	engines := func(names []string) []gotenberg.PdfEngine {
+		list := make([]gotenberg.PdfEngine, len(names))
+		for i, name := range names {
+			for _, engine := range mod.engines {
+				if name == engine.(gotenberg.Module).Descriptor().ID {
+					list[i] = engine
+					break
+				}
 			}
 		}
+
+		return list
 	}
 
-	return newMultiPdfEngines(engines...), nil
+	return newMultiPdfEngines(
+		engines(mod.mergeNames),
+		engines(mod.splitNames),
+		engines(mod.flattenNames),
+		engines(mod.convertNames),
+		engines(mod.readMetadataNames),
+		engines(mod.writeMetadataNames),
+	), nil
 }
 
 // Routes returns the HTTP routes.
@@ -179,7 +244,11 @@ func (mod *PdfEngines) Routes() ([]api.Route, error) {
 
 	return []api.Route{
 		mergeRoute(engine),
+		splitRoute(engine),
+		flattenRoute(engine),
 		convertRoute(engine),
+		readMetadataRoute(engine),
+		writeMetadataRoute(engine),
 	}, nil
 }
 

pkg/modules/pdfengines/pdfengines_test.go

@@ -2,13 +2,12 @@ package pdfengines
 
 import (
 	"errors"
+	"fmt"
 	"reflect"
 	"strings"
 	"testing"
 
-	"go.uber.org/zap"
-
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestPdfEngines_Descriptor(t *testing.T) {
@@ -24,26 +23,27 @@ func TestPdfEngines_Descriptor(t *testing.T) {
 
 func TestPdfEngines_Provision(t *testing.T) {
 	for _, tc := range []struct {
-		scenario           string
-		ctx                *gotenberg.Context
-		expectedPdfEngines []string
-		expectError        bool
+		scenario                        string
+		ctx                             *gotenberg.Context
+		expectedMergePdfEngines         []string
+		expectedSplitPdfEngines         []string
+		expectedFlattenPdfEngines       []string
+		expectedConvertPdfEngines       []string
+		expectedReadMetadataPdfEngines  []string
+		expectedWriteMetadataPdfEngines []string
+		expectError                     bool
 	}{
 		{
 			scenario: "no selection from user",
 			ctx: func() *gotenberg.Context {
 				provider := &struct {
 					gotenberg.ModuleMock
-					gotenberg.LoggerProviderMock
 				}{}
 				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
 						return provider
 					}}
 				}
-				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
-					return zap.NewNop(), nil
-				}
 
 				engine := &struct {
 					gotenberg.ModuleMock
@@ -67,25 +67,25 @@ func TestPdfEngines_Provision(t *testing.T) {
 					},
 				)
 			}(),
-			expectedPdfEngines: []string{"bar"},
-			expectError:        false,
+			expectedMergePdfEngines:         []string{"qpdf", "pdfcpu", "pdftk"},
+			expectedSplitPdfEngines:         []string{"pdfcpu", "qpdf", "pdftk"},
+			expectedFlattenPdfEngines:       []string{"qpdf"},
+			expectedConvertPdfEngines:       []string{"libreoffice-pdfengine"},
+			expectedReadMetadataPdfEngines:  []string{"exiftool"},
+			expectedWriteMetadataPdfEngines: []string{"exiftool"},
+			expectError:                     false,
 		},
 		{
 			scenario: "selection from user",
 			ctx: func() *gotenberg.Context {
 				provider := &struct {
 					gotenberg.ModuleMock
-					gotenberg.LoggerProviderMock
 				}{}
 				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
 						return provider
 					}}
 				}
-				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
-					return zap.NewNop(), nil
-				}
-
 				engine1 := &struct {
 					gotenberg.ModuleMock
 					gotenberg.ValidatorMock
@@ -111,7 +111,7 @@ func TestPdfEngines_Provision(t *testing.T) {
 				}
 
 				fs := new(PdfEngines).Descriptor().FlagSet
-				err := fs.Parse([]string{"--pdfengines-engines=b", "--pdfengines-engines=a"})
+				err := fs.Parse([]string{"--pdfengines-merge-engines=b", "--pdfengines-split-engines=a", "--pdfengines-flatten-engines=c", "--pdfengines-convert-engines=b", "--pdfengines-read-metadata-engines=a", "--pdfengines-write-metadata-engines=a"})
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
@@ -127,111 +127,26 @@ func TestPdfEngines_Provision(t *testing.T) {
 					},
 				)
 			}(),
-			expectedPdfEngines: []string{"b", "a"},
-			expectError:        false,
-		},
-		{
-			scenario: "user select deprecated unoconv-pdfengine",
-			ctx: func() *gotenberg.Context {
-				provider := &struct {
-					gotenberg.ModuleMock
-					gotenberg.LoggerProviderMock
-				}{}
-				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider
-					}}
-				}
-				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
-					return zap.NewNop(), nil
-				}
 
-				engine := &struct {
-					gotenberg.ModuleMock
-					gotenberg.ValidatorMock
-					gotenberg.PdfEngineMock
-				}{}
-				engine.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "libreoffice-pdfengine", New: func() gotenberg.Module { return engine }}
-				}
-				engine.ValidateMock = func() error {
-					return nil
-				}
-
-				fs := new(PdfEngines).Descriptor().FlagSet
-				err := fs.Parse([]string{"--pdfengines-engines=unoconv-pdfengine"})
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: fs,
-					},
-					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
-						engine.Descriptor(),
-					},
-				)
-			}(),
-			expectedPdfEngines: []string{"libreoffice-pdfengine"},
-			expectError:        false,
-		},
-		{
-			scenario: "no logger provider",
-			ctx: func() *gotenberg.Context {
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: new(PdfEngines).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{},
-				)
-			}(),
-			expectError: true,
-		},
-		{
-			scenario: "no logger from logger provider",
-			ctx: func() *gotenberg.Context {
-				provider := &struct {
-					gotenberg.ModuleMock
-					gotenberg.LoggerProviderMock
-				}{}
-				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider
-					}}
-				}
-				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
-					return nil, errors.New("foo")
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: new(PdfEngines).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
-					},
-				)
-			}(),
-			expectError: true,
+			expectedMergePdfEngines:         []string{"b"},
+			expectedSplitPdfEngines:         []string{"a"},
+			expectedFlattenPdfEngines:       []string{"c"},
+			expectedConvertPdfEngines:       []string{"b"},
+			expectedReadMetadataPdfEngines:  []string{"a"},
+			expectedWriteMetadataPdfEngines: []string{"a"},
+			expectError:                     false,
 		},
 		{
 			scenario: "no valid PDF engine",
 			ctx: func() *gotenberg.Context {
 				provider := &struct {
 					gotenberg.ModuleMock
-					gotenberg.LoggerProviderMock
 				}{}
 				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
 						return provider
 					}}
 				}
-				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
-					return zap.NewNop(), nil
-				}
-
 				engine := &struct {
 					gotenberg.ModuleMock
 					gotenberg.ValidatorMock
@@ -269,13 +184,53 @@ func TestPdfEngines_Provision(t *testing.T) {
 				t.Fatal("expected error but got none")
 			}
 
-			if len(tc.expectedPdfEngines) != len(mod.names) {
-				t.Fatalf("expected %d names but got %d", len(tc.expectedPdfEngines), len(mod.names))
+			if len(tc.expectedMergePdfEngines) != len(mod.mergeNames) {
+				t.Fatalf("expected %d merge names but got %d", len(tc.expectedMergePdfEngines), len(mod.mergeNames))
 			}
 
-			for index, name := range mod.names {
-				if name != tc.expectedPdfEngines[index] {
-					t.Fatalf("expected scenario at index %d to be %s, but got: %s", index, name, tc.expectedPdfEngines[index])
+			if len(tc.expectedFlattenPdfEngines) != len(mod.flattenNames) {
+				t.Fatalf("expected %d flatten names but got %d", len(tc.expectedFlattenPdfEngines), len(mod.flattenNames))
+			}
+
+			if len(tc.expectedConvertPdfEngines) != len(mod.convertNames) {
+				t.Fatalf("expected %d convert names but got %d", len(tc.expectedConvertPdfEngines), len(mod.convertNames))
+			}
+
+			if len(tc.expectedReadMetadataPdfEngines) != len(mod.readMetadataNames) {
+				t.Fatalf("expected %d read metadata names but got %d", len(tc.expectedReadMetadataPdfEngines), len(mod.readMetadataNames))
+			}
+
+			if len(tc.expectedWriteMetadataPdfEngines) != len(mod.writeMetadataNames) {
+				t.Fatalf("expected %d write metadata names but got %d", len(tc.expectedWriteMetadataPdfEngines), len(mod.writeMetadataNames))
+			}
+
+			for index, name := range mod.mergeNames {
+				if name != tc.expectedMergePdfEngines[index] {
+					t.Fatalf("expected merge name at index %d to be %s, but got: %s", index, name, tc.expectedMergePdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.splitNames {
+				if name != tc.expectedSplitPdfEngines[index] {
+					t.Fatalf("expected split name at index %d to be %s, but got: %s", index, name, tc.expectedSplitPdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.convertNames {
+				if name != tc.expectedConvertPdfEngines[index] {
+					t.Fatalf("expected convert name at index %d to be %s, but got: %s", index, name, tc.expectedConvertPdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.readMetadataNames {
+				if name != tc.expectedReadMetadataPdfEngines[index] {
+					t.Fatalf("expected read metadata name at index %d to be %s, but got: %s", index, name, tc.expectedReadMetadataPdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.writeMetadataNames {
+				if name != tc.expectedWriteMetadataPdfEngines[index] {
+					t.Fatalf("expected write metadat name at index %d to be %s, but got: %s", index, name, tc.expectedWriteMetadataPdfEngines[index])
 				}
 			}
 		})
@@ -341,8 +296,11 @@ func TestPdfEngines_Validate(t *testing.T) {
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			mod := PdfEngines{
-				names:   tc.names,
-				engines: tc.engines,
+				mergeNames:         tc.names,
+				convertNames:       tc.names,
+				readMetadataNames:  tc.names,
+				writeMetadataNames: tc.names,
+				engines:            tc.engines,
 			}
 
 			err := mod.Validate()
@@ -360,22 +318,41 @@ func TestPdfEngines_Validate(t *testing.T) {
 
 func TestPdfEngines_SystemMessages(t *testing.T) {
 	mod := new(PdfEngines)
-	mod.names = []string{"foo", "bar"}
+	mod.mergeNames = []string{"foo", "bar"}
+	mod.splitNames = []string{"foo", "bar"}
+	mod.convertNames = []string{"foo", "bar"}
+	mod.readMetadataNames = []string{"foo", "bar"}
+	mod.writeMetadataNames = []string{"foo", "bar"}
 
+	expectedMessages := 6
 	messages := mod.SystemMessages()
-	if len(messages) != 1 {
-		t.Errorf("expected one and only one message, but got %d", len(messages))
+	if len(messages) != expectedMessages {
+		t.Errorf("expected %d message(s), but got %d", expectedMessages, len(messages))
 	}
 
-	expect := strings.Join(mod.names[:], " ")
-	if messages[0] != expect {
-		t.Errorf("expected message '%s', but got '%s'", expect, messages[0])
+	expect := []string{
+		fmt.Sprintf("merge engines - %s", strings.Join(mod.mergeNames[:], " ")),
+		fmt.Sprintf("split engines - %s", strings.Join(mod.splitNames[:], " ")),
+		fmt.Sprintf("flatten engines - %s", strings.Join(mod.flattenNames[:], " ")),
+		fmt.Sprintf("convert engines - %s", strings.Join(mod.convertNames[:], " ")),
+		fmt.Sprintf("read metadata engines - %s", strings.Join(mod.readMetadataNames[:], " ")),
+		fmt.Sprintf("write metadata engines - %s", strings.Join(mod.writeMetadataNames[:], " ")),
+	}
+
+	for i, message := range messages {
+		if message != expect[i] {
+			t.Errorf("expected message at index %d to be %s, but got %s", i, message, expect[i])
+		}
 	}
 }
 
 func TestPdfEngines_PdfEngine(t *testing.T) {
 	mod := PdfEngines{
-		names: []string{"foo", "bar"},
+		mergeNames:         []string{"foo", "bar"},
+		splitNames:         []string{"foo", "bar"},
+		convertNames:       []string{"foo", "bar"},
+		readMetadataNames:  []string{"foo", "bar"},
+		writeMetadataNames: []string{"foo", "bar"},
 		engines: func() []gotenberg.PdfEngine {
 			engine1 := &struct {
 				gotenberg.ModuleMock
@@ -414,7 +391,7 @@ func TestPdfEngines_Routes(t *testing.T) {
 	}{
 		{
 			scenario:      "routes not disabled",
-			expectRoutes:  2,
+			expectRoutes:  6,
 			disableRoutes: false,
 		},
 		{

pkg/modules/pdfengines/routes.go

@@ -1,16 +1,259 @@
 package pdfengines
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
+	"path/filepath"
+	"strconv"
+	"strings"
 
 	"github.com/labstack/echo/v4"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
 )
 
+// FormDataPdfSplitMode creates a [gotenberg.SplitMode] from the form data.
+func FormDataPdfSplitMode(form *api.FormData, mandatory bool) gotenberg.SplitMode {
+	var (
+		mode  string
+		span  string
+		unify bool
+	)
+
+	splitModeFunc := func(value string) error {
+		if value != "" && value != gotenberg.SplitModeIntervals && value != gotenberg.SplitModePages {
+			return fmt.Errorf("wrong value, expected either '%s' or '%s'", gotenberg.SplitModeIntervals, gotenberg.SplitModePages)
+		}
+		mode = value
+		return nil
+	}
+
+	splitSpanFunc := func(value string) error {
+		value = strings.Join(strings.Fields(value), "")
+
+		if mode == gotenberg.SplitModeIntervals {
+			intValue, err := strconv.Atoi(value)
+			if err != nil {
+				return err
+			}
+			if intValue < 1 {
+				return errors.New("value is inferior to 1")
+			}
+		}
+
+		span = value
+
+		return nil
+	}
+
+	if mandatory {
+		form.
+			MandatoryCustom("splitMode", func(value string) error {
+				return splitModeFunc(value)
+			}).
+			MandatoryCustom("splitSpan", func(value string) error {
+				return splitSpanFunc(value)
+			})
+	} else {
+		form.
+			Custom("splitMode", func(value string) error {
+				return splitModeFunc(value)
+			}).
+			Custom("splitSpan", func(value string) error {
+				return splitSpanFunc(value)
+			})
+	}
+
+	form.
+		Bool("splitUnify", &unify, false).
+		Custom("splitUnify", func(value string) error {
+			if value != "" && unify && mode != gotenberg.SplitModePages {
+				return fmt.Errorf("unify is not available for split mode '%s'", mode)
+			}
+			return nil
+		})
+
+	return gotenberg.SplitMode{
+		Mode:  mode,
+		Span:  span,
+		Unify: unify,
+	}
+}
+
+// FormDataPdfFormats creates [gotenberg.PdfFormats] from the form data.
+// Fallback to default value if the considered key is not present.
+func FormDataPdfFormats(form *api.FormData) gotenberg.PdfFormats {
+	var (
+		pdfa  string
+		pdfua bool
+	)
+
+	form.
+		String("pdfa", &pdfa, "").
+		Bool("pdfua", &pdfua, false)
+
+	return gotenberg.PdfFormats{
+		PdfA:  pdfa,
+		PdfUa: pdfua,
+	}
+}
+
+// FormDataPdfMetadata creates metadata object from the form data.
+func FormDataPdfMetadata(form *api.FormData, mandatory bool) map[string]interface{} {
+	var metadata map[string]interface{}
+
+	metadataFunc := func(value string) error {
+		if len(value) > 0 {
+			err := json.Unmarshal([]byte(value), &metadata)
+			if err != nil {
+				return fmt.Errorf("unmarshal metadata: %w", err)
+			}
+		}
+		return nil
+	}
+
+	if mandatory {
+		form.MandatoryCustom("metadata", func(value string) error {
+			return metadataFunc(value)
+		})
+	} else {
+		form.Custom("metadata", func(value string) error {
+			return metadataFunc(value)
+		})
+	}
+
+	return metadata
+}
+
+// MergeStub merges given PDFs. If only one input PDF, it does nothing and
+// returns the corresponding input path.
+func MergeStub(ctx *api.Context, engine gotenberg.PdfEngine, inputPaths []string) (string, error) {
+	if len(inputPaths) == 0 {
+		return "", errors.New("no input paths")
+	}
+
+	if len(inputPaths) == 1 {
+		return inputPaths[0], nil
+	}
+
+	outputPath := ctx.GeneratePath(".pdf")
+	err := engine.Merge(ctx, ctx.Log(), inputPaths, outputPath)
+	if err != nil {
+		return "", fmt.Errorf("merge %d PDFs: %w", len(inputPaths), err)
+	}
+
+	return outputPath, nil
+}
+
+// SplitPdfStub splits a list of PDF files based on [gotenberg.SplitMode].
+// It returns a list of output paths or the list of provided input paths if no
+// split requested.
+func SplitPdfStub(ctx *api.Context, engine gotenberg.PdfEngine, mode gotenberg.SplitMode, inputPaths []string) ([]string, error) {
+	zeroValued := gotenberg.SplitMode{}
+	if mode == zeroValued {
+		return inputPaths, nil
+	}
+
+	var outputPaths []string
+	for _, inputPath := range inputPaths {
+		inputPathNoExt := inputPath[:len(inputPath)-len(filepath.Ext(inputPath))]
+		filenameNoExt := filepath.Base(inputPathNoExt)
+		outputDirPath, err := ctx.CreateSubDirectory(strings.ReplaceAll(filepath.Base(filenameNoExt), ".", "_"))
+		if err != nil {
+			return nil, fmt.Errorf("create subdirectory from input path: %w", err)
+		}
+
+		paths, err := engine.Split(ctx, ctx.Log(), mode, inputPath, outputDirPath)
+		if err != nil {
+			return nil, fmt.Errorf("split PDF '%s': %w", inputPath, err)
+		}
+
+		// Keep the original filename.
+		for i, path := range paths {
+			var newPath string
+			if mode.Unify && mode.Mode == gotenberg.SplitModePages {
+				newPath = fmt.Sprintf(
+					"%s/%s.pdf",
+					outputDirPath, filenameNoExt,
+				)
+			} else {
+				newPath = fmt.Sprintf(
+					"%s/%s_%d.pdf",
+					outputDirPath, filenameNoExt, i,
+				)
+			}
+
+			err = ctx.Rename(path, newPath)
+			if err != nil {
+				return nil, fmt.Errorf("rename path: %w", err)
+			}
+
+			outputPaths = append(outputPaths, newPath)
+
+			if mode.Unify && mode.Mode == gotenberg.SplitModePages {
+				break
+			}
+		}
+	}
+
+	return outputPaths, nil
+}
+
+// FlattenStub merges annotation appearances with page content for each given
+// PDF, effectively deleting the original annotations.
+func FlattenStub(ctx *api.Context, engine gotenberg.PdfEngine, inputPaths []string) error {
+	for _, inputPath := range inputPaths {
+		err := engine.Flatten(ctx, ctx.Log(), inputPath)
+		if err != nil {
+			return fmt.Errorf("flatten '%s': %w", inputPath, err)
+		}
+	}
+
+	return nil
+}
+
+// ConvertStub transforms a given PDF to the specified formats defined in
+// [gotenberg.PdfFormats]. If no format, it does nothing and returns the input
+// paths.
+func ConvertStub(ctx *api.Context, engine gotenberg.PdfEngine, formats gotenberg.PdfFormats, inputPaths []string) ([]string, error) {
+	zeroValued := gotenberg.PdfFormats{}
+	if formats == zeroValued {
+		return inputPaths, nil
+	}
+
+	outputPaths := make([]string, len(inputPaths))
+	for i, inputPath := range inputPaths {
+		outputPaths[i] = ctx.GeneratePath(".pdf")
+
+		err := engine.Convert(ctx, ctx.Log(), formats, inputPath, outputPaths[i])
+		if err != nil {
+			return nil, fmt.Errorf("convert '%s': %w", inputPath, err)
+		}
+	}
+
+	return outputPaths, nil
+}
+
+// WriteMetadataStub writes the metadata into PDF files. If no metadata, it
+// does nothing.
+func WriteMetadataStub(ctx *api.Context, engine gotenberg.PdfEngine, metadata map[string]interface{}, inputPaths []string) error {
+	if len(metadata) == 0 {
+		return nil
+	}
+
+	for _, inputPath := range inputPaths {
+		err := engine.WriteMetadata(ctx, ctx.Log(), metadata, inputPath)
+		if err != nil {
+			return fmt.Errorf("write metadata into '%s': %w", inputPath, err)
+		}
+	}
+
+	return nil
+}
+
 // mergeRoute returns an [api.Route] which can merge PDFs.
 func mergeRoute(engine gotenberg.PdfEngine) api.Route {
 	return api.Route{
@@ -20,84 +263,46 @@ func mergeRoute(engine gotenberg.PdfEngine) api.Route {
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
 
-			// Let's get the data from the form and validate them.
-			var (
-				inputPaths []string
-				pdfFormat  string
-				pdfa       string
-				pdfua      bool
-			)
+			form := ctx.FormData()
+			pdfFormats := FormDataPdfFormats(form)
+			metadata := FormDataPdfMetadata(form, false)
 
-			err := ctx.FormData().
+			var inputPaths []string
+			var flatten bool
+			err := form.
 				MandatoryPaths([]string{".pdf"}, &inputPaths).
-				String("pdfFormat", &pdfFormat, "").
-				String("pdfa", &pdfa, "").
-				Bool("pdfua", &pdfua, false).
+				Bool("flatten", &flatten, false).
 				Validate()
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			var actualPdfArchive string
-
-			if pdfFormat != "" {
-				// FIXME: deprecated
-				ctx.Log().Warn("'pdfFormat' is deprecated; prefer the 'pdfa' form field instead")
-				actualPdfArchive = pdfFormat
-			}
-
-			if pdfa != "" {
-				actualPdfArchive = pdfa
-			}
-
-			pdfFormats := gotenberg.PdfFormats{
-				PdfA:  actualPdfArchive,
-				PdfUa: pdfua,
-			}
-
-			// Alright, let's merge the PDFs.
-
 			outputPath := ctx.GeneratePath(".pdf")
-
 			err = engine.Merge(ctx, ctx.Log(), inputPaths, outputPath)
 			if err != nil {
 				return fmt.Errorf("merge PDFs: %w", err)
 			}
 
-			// So far so good, the PDFs are merged into one unique PDF.
-			// Now, let's check if the client want to convert this result PDF
-			// to specific PDF formats.
-			zeroValued := gotenberg.PdfFormats{}
-			if pdfFormats != zeroValued {
-				convertInputPath := outputPath
-				convertOutputPath := ctx.GeneratePath(".pdf")
-
-				err = engine.Convert(ctx, ctx.Log(), pdfFormats, convertInputPath, convertOutputPath)
-
-				if err != nil {
-					if errors.Is(err, gotenberg.ErrPdfFormatNotSupported) {
-						return api.WrapError(
-							fmt.Errorf("convert PDF: %w", err),
-							api.NewSentinelHttpError(
-								http.StatusBadRequest,
-								fmt.Sprintf("At least one PDF engine does not handle one of the PDF format in '%+v', while other have failed to convert for other reasons", pdfFormats),
-							),
-						)
-					}
-
-					return fmt.Errorf("convert PDF: %w", err)
-				}
-
-				// Important: the output path is now the converted file.
-				outputPath = convertOutputPath
+			outputPaths, err := ConvertStub(ctx, engine, pdfFormats, []string{outputPath})
+			if err != nil {
+				return fmt.Errorf("convert PDF: %w", err)
 			}
 
-			// Last but not least, add the output path to the context so that
-			// the API is able to send it as a response to the client.
-
-			err = ctx.AddOutputPaths(outputPath)
+			err = WriteMetadataStub(ctx, engine, metadata, outputPaths)
 			if err != nil {
-				return fmt.Errorf("add output path: %w", err)
+				return fmt.Errorf("write metadata: %w", err)
+			}
+
+			if flatten {
+				err = FlattenStub(ctx, engine, outputPaths)
+				if err != nil {
+					return fmt.Errorf("flatten PDFs: %w", err)
+				}
+			}
+
+			err = ctx.AddOutputPaths(outputPaths...)
+			if err != nil {
+				return fmt.Errorf("add output paths: %w", err)
 			}
 
 			return nil
@@ -105,8 +310,110 @@ func mergeRoute(engine gotenberg.PdfEngine) api.Route {
 	}
 }
 
-// convertRoute returns an [api.Route] which can convert a PDF to a specific
-// PDF format.
+// splitRoute returns an [api.Route] which can extract pages from a PDF.
+func splitRoute(engine gotenberg.PdfEngine) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/pdfengines/split",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+
+			form := ctx.FormData()
+			mode := FormDataPdfSplitMode(form, true)
+			pdfFormats := FormDataPdfFormats(form)
+			metadata := FormDataPdfMetadata(form, false)
+
+			var inputPaths []string
+			var flatten bool
+			err := form.
+				MandatoryPaths([]string{".pdf"}, &inputPaths).
+				Bool("flatten", &flatten, false).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			outputPaths, err := SplitPdfStub(ctx, engine, mode, inputPaths)
+			if err != nil {
+				return fmt.Errorf("split PDFs: %w", err)
+			}
+
+			convertOutputPaths, err := ConvertStub(ctx, engine, pdfFormats, outputPaths)
+			if err != nil {
+				return fmt.Errorf("convert PDFs: %w", err)
+			}
+
+			err = WriteMetadataStub(ctx, engine, metadata, convertOutputPaths)
+			if err != nil {
+				return fmt.Errorf("write metadata: %w", err)
+			}
+
+			if flatten {
+				err = FlattenStub(ctx, engine, convertOutputPaths)
+				if err != nil {
+					return fmt.Errorf("flatten PDFs: %w", err)
+				}
+			}
+
+			zeroValuedSplitMode := gotenberg.SplitMode{}
+			zeroValuedPdfFormats := gotenberg.PdfFormats{}
+			if mode != zeroValuedSplitMode && pdfFormats != zeroValuedPdfFormats {
+				// Rename the files to keep the split naming.
+				for i, convertOutputPath := range convertOutputPaths {
+					err = ctx.Rename(convertOutputPath, outputPaths[i])
+					if err != nil {
+						return fmt.Errorf("rename output path: %w", err)
+					}
+				}
+			}
+
+			err = ctx.AddOutputPaths(outputPaths...)
+			if err != nil {
+				return fmt.Errorf("add output paths: %w", err)
+			}
+
+			return nil
+		},
+	}
+}
+
+// flattenRoute returns an [api.Route] which can flatten PDFs.
+func flattenRoute(engine gotenberg.PdfEngine) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/pdfengines/flatten",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+
+			form := ctx.FormData()
+
+			var inputPaths []string
+			err := form.
+				MandatoryPaths([]string{".pdf"}, &inputPaths).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			err = FlattenStub(ctx, engine, inputPaths)
+			if err != nil {
+				return fmt.Errorf("flatten PDFs: %w", err)
+			}
+
+			err = ctx.AddOutputPaths(inputPaths...)
+			if err != nil {
+				return fmt.Errorf("add output paths: %w", err)
+			}
+
+			return nil
+		},
+	}
+}
+
+// convertRoute returns an [api.Route] which can convert PDFs to a specific ODF
+// format.
 func convertRoute(engine gotenberg.PdfEngine) api.Route {
 	return api.Route{
 		Method:      http.MethodPost,
@@ -115,41 +422,17 @@ func convertRoute(engine gotenberg.PdfEngine) api.Route {
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
 
-			// Let's get the data from the form and validate them.
-			var (
-				inputPaths []string
-				pdfFormat  string
-				pdfa       string
-				pdfua      bool
-			)
+			form := ctx.FormData()
+			pdfFormats := FormDataPdfFormats(form)
 
-			err := ctx.FormData().
+			var inputPaths []string
+			err := form.
 				MandatoryPaths([]string{".pdf"}, &inputPaths).
-				String("pdfFormat", &pdfFormat, "").
-				String("pdfa", &pdfa, "").
-				Bool("pdfua", &pdfua, false).
 				Validate()
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			var actualPdfArchive string
-
-			if pdfFormat != "" {
-				// FIXME: deprecated.
-				ctx.Log().Warn("'pdfFormat' is deprecated; prefer the 'pdfa' form field instead")
-				actualPdfArchive = pdfFormat
-			}
-
-			if pdfa != "" {
-				actualPdfArchive = pdfa
-			}
-
-			pdfFormats := gotenberg.PdfFormats{
-				PdfA:  actualPdfArchive,
-				PdfUa: pdfua,
-			}
-
 			zeroValued := gotenberg.PdfFormats{}
 			if pdfFormats == zeroValued {
 				return api.WrapError(
@@ -161,31 +444,22 @@ func convertRoute(engine gotenberg.PdfEngine) api.Route {
 				)
 			}
 
-			// Alright, let's convert the PDFs.
-			outputPaths := make([]string, len(inputPaths))
-
-			for i, inputPath := range inputPaths {
-				outputPaths[i] = ctx.GeneratePath(".pdf")
-
-				err = engine.Convert(ctx, ctx.Log(), pdfFormats, inputPath, outputPaths[i])
-
-				if err != nil {
-					if errors.Is(err, gotenberg.ErrPdfFormatNotSupported) {
-						return api.WrapError(
-							fmt.Errorf("convert PDF: %w", err),
-							api.NewSentinelHttpError(
-								http.StatusBadRequest,
-								fmt.Sprintf("At least one PDF engine does not handle one of the PDF format in '%+v', while other have failed to convert for other reasons", pdfFormats),
-							),
-						)
-					}
-
-					return fmt.Errorf("convert PDF: %w", err)
-				}
+			outputPaths, err := ConvertStub(ctx, engine, pdfFormats, inputPaths)
+			if err != nil {
+				return fmt.Errorf("convert PDFs: %w", err)
 			}
 
-			// Last but not least, add the output paths to the context so that
-			// the API is able to send them as a response to the client.
+			if len(outputPaths) > 1 {
+				// If .zip archive, keep the original filename.
+				for i, inputPath := range inputPaths {
+					err = ctx.Rename(outputPaths[i], inputPath)
+					if err != nil {
+						return fmt.Errorf("rename output path: %w", err)
+					}
+
+					outputPaths[i] = inputPath
+				}
+			}
 
 			err = ctx.AddOutputPaths(outputPaths...)
 			if err != nil {
@@ -196,3 +470,76 @@ func convertRoute(engine gotenberg.PdfEngine) api.Route {
 		},
 	}
 }
+
+// readMetadataRoute returns an [api.Route] which returns the metadata of PDFs.
+func readMetadataRoute(engine gotenberg.PdfEngine) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/pdfengines/metadata/read",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+
+			var inputPaths []string
+			err := ctx.FormData().
+				MandatoryPaths([]string{".pdf"}, &inputPaths).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			res := make(map[string]map[string]interface{}, len(inputPaths))
+			for _, inputPath := range inputPaths {
+				metadata, err := engine.ReadMetadata(ctx, ctx.Log(), inputPath)
+				if err != nil {
+					return fmt.Errorf("read metadata: %w", err)
+				}
+
+				res[filepath.Base(inputPath)] = metadata
+			}
+
+			err = c.JSON(http.StatusOK, res)
+			if err != nil {
+				return fmt.Errorf("return JSON response: %w", err)
+			}
+
+			return api.ErrNoOutputFile
+		},
+	}
+}
+
+// writeMetadataRoute returns an [api.Route] which can write metadata into
+// PDFs.
+func writeMetadataRoute(engine gotenberg.PdfEngine) api.Route {
+	return api.Route{
+		Method:      http.MethodPost,
+		Path:        "/forms/pdfengines/metadata/write",
+		IsMultipart: true,
+		Handler: func(c echo.Context) error {
+			ctx := c.Get("context").(*api.Context)
+
+			form := ctx.FormData()
+			metadata := FormDataPdfMetadata(form, true)
+
+			var inputPaths []string
+			err := form.
+				MandatoryPaths([]string{".pdf"}, &inputPaths).
+				Validate()
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			err = WriteMetadataStub(ctx, engine, metadata, inputPaths)
+			if err != nil {
+				return fmt.Errorf("write metadata: %w", err)
+			}
+
+			err = ctx.AddOutputPaths(inputPaths...)
+			if err != nil {
+				return fmt.Errorf("add output paths: %w", err)
+			}
+
+			return nil
+		},
+	}
+}

pkg/modules/pdftk/doc.go

@@ -1,8 +1,11 @@
 // Package pdftk provides an implementation of the gotenberg.PdfEngine
-// interface using the PDFtk command-line tool. This package allows for the
-// merging  of PDF files but does not support conversion to specific PDF
-// formats. The path to the PDFtk binary must be specified using the
-// PDFTK_BIN_PATH environment variable.
+// interface using the PDFtk command-line tool. This package allows for:
+//
+// 1. The merging of PDF files.
+// 2. The splitting of PDF files.
+//
+// The path to the PDFtk binary must be specified using the PDFTK_BIN_PATH
+// environment variable.
 //
 // See: https://gitlab.com/pdftk-java/pdftk.
 package pdftk

pkg/modules/pdftk/pdftk.go

@@ -5,11 +5,11 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"sync"
+	"path/filepath"
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
@@ -46,27 +46,38 @@ func (engine *PdfTk) Provision(ctx *gotenberg.Context) error {
 func (engine *PdfTk) Validate() error {
 	_, err := os.Stat(engine.binPath)
 	if os.IsNotExist(err) {
-		return fmt.Errorf("PdfTk binary path does not exist: %w", err)
+		return fmt.Errorf("PDFtk binary path does not exist: %w", err)
 	}
 
 	return nil
 }
 
-// Metrics returns the metrics.
-func (engine *PdfTk) Metrics() ([]gotenberg.Metric, error) {
-	// TODO: remove deprecated.
-	return []gotenberg.Metric{
-		{
-			Name:        "pdftk_active_instances_count",
-			Description: "Current number of active PDFtk instances - deprecated.",
-			Read: func() float64 {
-				activeInstancesCountMu.RLock()
-				defer activeInstancesCountMu.RUnlock()
+// Split splits a given PDF file.
+func (engine *PdfTk) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	var args []string
+	outputPath := fmt.Sprintf("%s/%s", outputDirPath, filepath.Base(inputPath))
 
-				return activeInstancesCount
-			},
-		},
-	}, nil
+	switch mode.Mode {
+	case gotenberg.SplitModePages:
+		if !mode.Unify {
+			return nil, fmt.Errorf("split PDFs using mode '%s' without unify with PDFtk: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
+		}
+		args = append(args, inputPath, "cat", mode.Span, "output", outputPath)
+	default:
+		return nil, fmt.Errorf("split PDFs using mode '%s' with PDFtk: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
+	}
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return nil, fmt.Errorf("create command: %w", err)
+	}
+
+	_, err = cmd.Exec()
+	if err != nil {
+		return nil, fmt.Errorf("split PDFs with PDFtk: %w", err)
+	}
+
+	return []string{outputPath}, nil
 }
 
 // Merge combines multiple PDFs into a single PDF.
@@ -80,16 +91,7 @@ func (engine *PdfTk) Merge(ctx context.Context, logger *zap.Logger, inputPaths [
 		return fmt.Errorf("create command: %w", err)
 	}
 
-	activeInstancesCountMu.Lock()
-	activeInstancesCount += 1
-	activeInstancesCountMu.Unlock()
-
 	_, err = cmd.Exec()
-
-	activeInstancesCountMu.Lock()
-	activeInstancesCount -= 1
-	activeInstancesCountMu.Unlock()
-
 	if err == nil {
 		return nil
 	}
@@ -97,21 +99,30 @@ func (engine *PdfTk) Merge(ctx context.Context, logger *zap.Logger, inputPaths [
 	return fmt.Errorf("merge PDFs with PDFtk: %w", err)
 }
 
+// Flatten is not available in this implementation.
+func (engine *PdfTk) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	return fmt.Errorf("flatten PDF with PDFtk: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
 // Convert is not available in this implementation.
 func (engine *PdfTk) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
 	return fmt.Errorf("convert PDF to '%+v' with PDFtk: %w", formats, gotenberg.ErrPdfEngineMethodNotSupported)
 }
 
-var (
-	activeInstancesCount   float64
-	activeInstancesCountMu sync.RWMutex
-)
+// ReadMetadata is not available in this implementation.
+func (engine *PdfTk) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	return nil, fmt.Errorf("read PDF metadata with PDFtk: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// WriteMetadata is not available in this implementation.
+func (engine *PdfTk) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	return fmt.Errorf("write PDF metadata with PDFtk: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
 
 // Interface guards.
 var (
-	_ gotenberg.Module          = (*PdfTk)(nil)
-	_ gotenberg.Provisioner     = (*PdfTk)(nil)
-	_ gotenberg.Validator       = (*PdfTk)(nil)
-	_ gotenberg.MetricsProvider = (*PdfTk)(nil)
-	_ gotenberg.PdfEngine       = (*PdfTk)(nil)
+	_ gotenberg.Module      = (*PdfTk)(nil)
+	_ gotenberg.Provisioner = (*PdfTk)(nil)
+	_ gotenberg.Validator   = (*PdfTk)(nil)
+	_ gotenberg.PdfEngine   = (*PdfTk)(nil)
 )

pkg/modules/pdftk/pdftk_test.go

@@ -9,7 +9,7 @@ import (
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestPdfTk_Descriptor(t *testing.T) {
@@ -71,22 +71,6 @@ func TestPdfTk_Validate(t *testing.T) {
 	}
 }
 
-func TestPdfTk_Metrics(t *testing.T) {
-	metrics, err := new(PdfTk).Metrics()
-	if err != nil {
-		t.Fatalf("expected no error but got: %v", err)
-	}
-
-	if len(metrics) != 1 {
-		t.Fatalf("expected %d metrics, but got %d", 1, len(metrics))
-	}
-
-	actual := metrics[0].Read()
-	if actual != 0 {
-		t.Errorf("expected %d PDFtk instances, but got %f", 0, actual)
-	}
-}
-
 func TestPdfTk_Merge(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
@@ -113,6 +97,7 @@ func TestPdfTk_Merge(t *testing.T) {
 			inputPaths: []string{
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 			},
+			expectError: false,
 		},
 		{
 			scenario: "many files success",
@@ -121,6 +106,7 @@ func TestPdfTk_Merge(t *testing.T) {
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 				"/tests/test/testdata/pdfengines/sample2.pdf",
 			},
+			expectError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
@@ -130,7 +116,7 @@ func TestPdfTk_Merge(t *testing.T) {
 				t.Fatalf("expected error but got: %v", err)
 			}
 
-			fs := gotenberg.NewFileSystem()
+			fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
 			outputDir, err := fs.MkdirAll()
 			if err != nil {
 				t.Fatalf("expected error but got: %v", err)
@@ -156,6 +142,105 @@ func TestPdfTk_Merge(t *testing.T) {
 	}
 }
 
+func TestPdfCpu_Split(t *testing.T) {
+	for _, tc := range []struct {
+		scenario               string
+		ctx                    context.Context
+		mode                   gotenberg.SplitMode
+		inputPath              string
+		expectError            bool
+		expectedError          error
+		expectOutputPathsCount int
+		expectOutputPaths      []string
+	}{
+		{
+			scenario:               "ErrPdfSplitModeNotSupported",
+			expectError:            true,
+			expectedError:          gotenberg.ErrPdfSplitModeNotSupported,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "ErrPdfSplitModeNotSupported (no unify with pages)",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1", Unify: false},
+			expectError:            true,
+			expectedError:          gotenberg.ErrPdfSplitModeNotSupported,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "invalid context",
+			ctx:                    nil,
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1-2", Unify: true},
+			expectError:            true,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "invalid input path",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1-2", Unify: true},
+			inputPath:              "",
+			expectError:            true,
+			expectOutputPathsCount: 0,
+		},
+		{
+			scenario:               "success (pages & unify)",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1-2", Unify: true},
+			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			expectError:            false,
+			expectOutputPathsCount: 1,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(PdfTk)
+			err := engine.Provision(nil)
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			fs := gotenberg.NewFileSystem(new(gotenberg.OsMkdirAll))
+			outputDir, err := fs.MkdirAll()
+			if err != nil {
+				t.Fatalf("expected error but got: %v", err)
+			}
+
+			defer func() {
+				err = os.RemoveAll(fs.WorkingDirPath())
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up but got: %v", err)
+				}
+			}()
+
+			outputPaths, err := engine.Split(tc.ctx, zap.NewNop(), tc.mode, tc.inputPath, outputDir)
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if tc.expectedError != nil && !errors.Is(err, tc.expectedError) {
+				t.Fatalf("expected error %v but got: %v", tc.expectedError, err)
+			}
+
+			if tc.expectOutputPathsCount != len(outputPaths) {
+				t.Errorf("expected %d output paths but got %d", tc.expectOutputPathsCount, len(outputPaths))
+			}
+		})
+	}
+}
+
+func TestPdfTk_Flatten(t *testing.T) {
+	engine := new(PdfTk)
+	err := engine.Flatten(context.TODO(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
 func TestPdfTk_Convert(t *testing.T) {
 	engine := new(PdfTk)
 	err := engine.Convert(context.TODO(), zap.NewNop(), gotenberg.PdfFormats{}, "", "")
@@ -164,3 +249,21 @@ func TestPdfTk_Convert(t *testing.T) {
 		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
 	}
 }
+
+func TestLibreOfficePdfEngine_ReadMetadata(t *testing.T) {
+	engine := new(PdfTk)
+	_, err := engine.ReadMetadata(context.Background(), zap.NewNop(), "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}
+
+func TestLibreOfficePdfEngine_WriteMetadata(t *testing.T) {
+	engine := new(PdfTk)
+	err := engine.WriteMetadata(context.Background(), zap.NewNop(), nil, "")
+
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
+	}
+}

pkg/modules/prometheus/prometheus.go

@@ -12,8 +12,8 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	flag "github.com/spf13/pflag"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
 )
 
 func init() {

pkg/modules/prometheus/prometheus_test.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/prometheus/client_golang/prometheus"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestPrometheus_Descriptor(t *testing.T) {

pkg/modules/qpdf/doc.go

@@ -1,8 +1,12 @@
 // Package qpdf provides an implementation of the gotenberg.PdfEngine
-// interface using the QPDF command-line tool. This package allows for the
-// merging  of PDF files but does not support conversion to specific PDF
-// formats. The path to the QPDF binary must be specified using the
-// QPDK_BIN_PATH environment variable.
+// interface using the QPDF command-line tool. This package allows for:
+//
+// 1. The merging of PDF files.
+// 2. The splitting of PDF files.
+// 3. Flattening of PDF files
+//
+// The path to the QPDF binary must be specified using the QPDK_BIN_PATH
+// environment variable.
 //
 // See: https://github.com/qpdf/qpdf.
 package qpdf

pkg/modules/qpdf/qpdf.go

@@ -5,11 +5,11 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"sync"
+	"path/filepath"
 
 	"go.uber.org/zap"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
@@ -46,27 +46,38 @@ func (engine *QPdf) Provision(ctx *gotenberg.Context) error {
 func (engine *QPdf) Validate() error {
 	_, err := os.Stat(engine.binPath)
 	if os.IsNotExist(err) {
-		return fmt.Errorf("QPdf binary path does not exist: %w", err)
+		return fmt.Errorf("QPDF binary path does not exist: %w", err)
 	}
 
 	return nil
 }
 
-// Metrics returns the metrics.
-func (engine *QPdf) Metrics() ([]gotenberg.Metric, error) {
-	// TODO: remove deprecated.
-	return []gotenberg.Metric{
-		{
-			Name:        "qpdf_active_instances_count",
-			Description: "Current number of active QPDF instances - deprecated.",
-			Read: func() float64 {
-				activeInstancesCountMu.RLock()
-				defer activeInstancesCountMu.RUnlock()
+// Split splits a given PDF file.
+func (engine *QPdf) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
+	var args []string
+	outputPath := fmt.Sprintf("%s/%s", outputDirPath, filepath.Base(inputPath))
 
-				return activeInstancesCount
-			},
-		},
-	}, nil
+	switch mode.Mode {
+	case gotenberg.SplitModePages:
+		if !mode.Unify {
+			return nil, fmt.Errorf("split PDFs using mode '%s' without unify with QPDF: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
+		}
+		args = append(args, inputPath, "--pages", ".", mode.Span, "--", outputPath)
+	default:
+		return nil, fmt.Errorf("split PDFs using mode '%s' with QPDF: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
+	}
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return nil, fmt.Errorf("create command: %w", err)
+	}
+
+	_, err = cmd.Exec()
+	if err != nil {
+		return nil, fmt.Errorf("split PDFs with QPDF: %w", err)
+	}
+
+	return []string{outputPath}, nil
 }
 
 // Merge combines multiple PDFs into a single PDF.
@@ -82,16 +93,7 @@ func (engine *QPdf) Merge(ctx context.Context, logger *zap.Logger, inputPaths []
 		return fmt.Errorf("create command: %w", err)
 	}
 
-	activeInstancesCountMu.Lock()
-	activeInstancesCount += 1
-	activeInstancesCountMu.Unlock()
-
 	_, err = cmd.Exec()
-
-	activeInstancesCountMu.Lock()
-	activeInstancesCount -= 1
-	activeInstancesCountMu.Unlock()
-
 	if err == nil {
 		return nil
 	}
@@ -99,20 +101,46 @@ func (engine *QPdf) Merge(ctx context.Context, logger *zap.Logger, inputPaths []
 	return fmt.Errorf("merge PDFs with QPDF: %w", err)
 }
 
+// Flatten merges annotation appearances with page content, deleting the
+// original annotations.
+func (engine *QPdf) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
+	var args []string
+	args = append(args, "--generate-appearances")
+	args = append(args, "--flatten-annotations=all")
+	args = append(args, "--replace-input")
+	args = append(args, inputPath)
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return fmt.Errorf("create command: %w", err)
+	}
+
+	_, err = cmd.Exec()
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("flatten PDFs with QPDF: %w", err)
+}
+
 // Convert is not available in this implementation.
 func (engine *QPdf) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
 	return fmt.Errorf("convert PDF to '%+v' with QPDF: %w", formats, gotenberg.ErrPdfEngineMethodNotSupported)
 }
 
-var (
-	activeInstancesCount   float64
-	activeInstancesCountMu sync.RWMutex
-)
+// ReadMetadata is not available in this implementation.
+func (engine *QPdf) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	return nil, fmt.Errorf("read PDF metadata with QPDF: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
+
+// WriteMetadata is not available in this implementation.
+func (engine *QPdf) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	return fmt.Errorf("write PDF metadata with QPDF: %w", gotenberg.ErrPdfEngineMethodNotSupported)
+}
 
 var (
-	_ gotenberg.Module          = (*QPdf)(nil)
-	_ gotenberg.Provisioner     = (*QPdf)(nil)
-	_ gotenberg.Validator       = (*QPdf)(nil)
-	_ gotenberg.MetricsProvider = (*QPdf)(nil)
-	_ gotenberg.PdfEngine       = (*QPdf)(nil)
+	_ gotenberg.Module      = (*QPdf)(nil)
+	_ gotenberg.Provisioner = (*QPdf)(nil)
+	_ gotenberg.Validator   = (*QPdf)(nil)
+	_ gotenberg.PdfEngine   = (*QPdf)(nil)
 )