chore(deps): update Go dependencies

* add new metadata functions to pdf engine interface

* add exiftool module with relevant test cases

* use exiftool to overwrite metadata in libreoffice

* use exiftool to overwrite metadata in chromium

* fix linter issues

* fix more linter issues

* more test cases for better coverage

* remove utils

* minor changes

* remove metadata from pdfoptions

* correct indentation

* read/write metadata one file at a time.

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/stale.yml

@@ -1,5 +1,5 @@
 # Number of days of inactivity before an issue becomes stale
-daysUntilStale: 60
+daysUntilStale: 15
 # Number of days of inactivity before a stale issue is closed
 daysUntilClose: 7
 # Issues with these labels will never be considered stale

.github/workflows/continuous_delivery.yml

@@ -5,23 +5,22 @@ on:
     types: [ published ]
 
 jobs:
-
   release:
     name: Release Docker image
     runs-on: ubuntu-latest
     steps:
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v3
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Log in to Docker Hub Container Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Build and push Docker image
+      - name: Build and push Docker image for release
         run: |
           make release GOTENBERG_VERSION=${{ github.event.release.tag_name }}
           make release GOTENBERG_VERSION=${{ github.event.release.tag_name }} DOCKER_REPOSITORY=thecodingmachine

.github/workflows/continuous_integration.yml

@@ -14,12 +14,17 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout source code
-        uses: actions/checkout@v2
-      - name: Run linters
-        uses: golangci/golangci-lint-action@v2
+      - name: Setup Go
+        uses: actions/setup-go@v5
         with:
-          version: v1.50.1
+          go-version: '1.22'
+          cache: false
+      - name: Checkout source code
+        uses: actions/checkout@v4
+      - name: Run linters
+        uses: golangci/golangci-lint-action@v4
+        with:
+          version: v1.56.2
 
   tests:
     needs:
@@ -30,14 +35,37 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v3
       - name: Checkout source code
-        uses: actions/checkout@v2
+        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)
+          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

.gitignore

@@ -1,2 +1,3 @@
 /coverage.html
-/coverage.txt
+/coverage.txt
+/TODO.txt

.golangci.yml

@@ -1,27 +1,59 @@
+linters-settings:
+  gci:
+    sections:
+      - standard
+      - default
+      - prefix(github.com/gotenberg/gotenberg/v8)
+    skip-generated: true
+    custom-order: true
+
 linters:
   disable-all: true
   enable:
+    - asasalint
+    - asciicheck
+    - bidichk
     - bodyclose
+    - decorder
+    - dogsled
+    - dupl
+    - dupword
+    - durationcheck
     - errcheck
+    - errname
+    - exhaustive
+    - exportloopref
+    - gci
     - gofmt
     - goimports
+    - gofumpt
     - gosec
     - gosimple
     - govet
     - ineffassign
+    - importas
     - misspell
     - prealloc
+    - promlinter
+    - sloglint
+    - sqlclosecheck
     - staticcheck
+    - tenv
+    - testableexamples
+    - testifylint
+    - tparallel
     - typecheck
     - unconvert
     - unused
+    - wastedassign
+    - whitespace
+    - zerologlint
 
 run:
-  deadline: 5m
+  timeout: 5m
   issues-exit-code: 1
   tests: false
 
 output:
-  format: 'colored-line-number'
   print-issued-lines: true
   print-linter-name: true

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 Julien Neuhart
+Copyright (c) 2024 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

@@ -5,14 +5,14 @@ help: ## Show the help
 .PHONY: it
 it: build build-tests ## Initialize the development environment
 
-GOLANG_VERSION=1.19
+GOLANG_VERSION=1.22
 DOCKER_REPOSITORY=gotenberg
 GOTENBERG_VERSION=snapshot
 GOTENBERG_USER_GID=1001
 GOTENBERG_USER_UID=1001
-NOTO_COLOR_EMOJI_VERSION=v2.038 # See https://github.com/googlefonts/noto-emoji/releases.
+NOTO_COLOR_EMOJI_VERSION=v2.042 # 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=v1.50.1 # See https://github.com/golangci/golangci-lint/releases.
+GOLANGCI_LINT_VERSION=v1.56.2 # See https://github.com/golangci/golangci-lint/releases.
 
 .PHONY: build
 build: ## Build the Gotenberg's Docker image
@@ -29,10 +29,15 @@ build: ## Build the Gotenberg's Docker image
 GOTENBERG_GRACEFUL_SHUTDOWN_DURATION=30s
 API_PORT=3000
 API_PORT_FROM_ENV=
+API_START_TIMEOUT=30s
 API_TIMEOUT=30s
 API_ROOT_PATH=/
 API_TRACE_HEADER=Gotenberg-Trace
 API_DISABLE_HEALTH_CHECK_LOGGING=false
+CHROMIUM_RESTART_AFTER=0
+CHROMIUM_MAX_QUEUE_SIZE=0
+CHROMIUM_AUTO_START=false
+CHROMIUM_START_TIMEOUT=20s
 CHROMIUM_INCOGNITO=false
 CHROMIUM_ALLOW_INSECURE_LOCALHOST=false
 CHROMIUM_IGNORE_CERTIFICATE_ERRORS=false
@@ -41,20 +46,25 @@ 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_DISABLES_ROUTES=false
+LIBREOFFICE_RESTART_AFTER=10
+LIBREOFFICE_MAX_QUEUE_SIZE=0
+LIBREOFFICE_AUTO_START=false
+LIBREOFFICE_START_TIMEOUT=20s
+LIBREOFFICE_DISABLE_ROUTES=false
 LOG_LEVEL=info
 LOG_FORMAT=auto
+LOG_FIELDS_PREFIX=
 PDFENGINES_ENGINES=
 PDFENGINES_DISABLE_ROUTES=false
 PROMETHEUS_NAMESPACE=gotenberg
 PROMETHEUS_COLLECT_INTERVAL=1s
 PROMETHEUS_DISABLE_ROUTE_LOGGING=false
 PROMETHEUS_DISABLE_COLLECT=false
-UNO_LISTENER_START_TIMEOUT=10s
-UNO_LISTENER_RESTART_THRESHOLD=10
 WEBHOOK_ALLOW_LIST=
 WEBHOOK_DENY_LIST=
 WEBHOOK_ERROR_ALLOW_LIST=
@@ -74,10 +84,15 @@ run: ## Start a Gotenberg container
 	--gotenberg-graceful-shutdown-duration=$(GOTENBERG_GRACEFUL_SHUTDOWN_DURATION) \
 	--api-port=$(API_PORT) \
 	--api-port-from-env=$(API_PORT_FROM_ENV) \
+	--api-start-timeout=$(API_START_TIMEOUT) \
 	--api-timeout=$(API_TIMEOUT) \
 	--api-root-path=$(API_ROOT_PATH) \
 	--api-trace-header=$(API_TRACE_HEADER) \
 	--api-disable-health-check-logging=$(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) \
 	--chromium-ignore-certificate-errors=$(CHROMIUM_IGNORE_CERTIFICATE_ERRORS) \
@@ -85,23 +100,28 @@ run: ## Start a Gotenberg container
 	--chromium-allow-file-access-from-files=$(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-disable-routes=$(LIBREOFFICE_DISABLES_ROUTES) \
+	--libreoffice-restart-after=$(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) \
 	--log-level=$(LOG_LEVEL) \
 	--log-format=$(LOG_FORMAT) \
+	--log-fields-prefix=$(LOG_FIELDS_PREFIX) \
 	--pdfengines-engines=$(PDFENGINES_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=$(PROMETHEUS_DISABLE_COLLECT) \
-	--uno-listener-start-timeout=$(UNO_LISTENER_START_TIMEOUT) \
-	--uno-listener-restart-threshold=$(UNO_LISTENER_RESTART_THRESHOLD) \
-	--webhook-allow-list=$(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) \
@@ -134,14 +154,18 @@ tests-once: ## Run the tests once (prefer the "tests" command while developing)
 	$(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION)-tests \
 	gotest
 
+# go install mvdan.cc/gofumpt@latest
+# go install github.com/daixiang0/gci@latest
 .PHONY: fmt
 fmt: ## Format the code and "optimize" the dependencies
-	go fmt ./...
+	gofumpt -l -w .
+	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 (go get golang.org/x/tools/cmd/godoc)
-	$(info http://localhost:6060/pkg/github.com/gotenberg/gotenberg/v7)
+godoc: ## Run a webserver with Gotenberg godoc
+	$(info http://localhost:6060/pkg/github.com/gotenberg/gotenberg/v8)
 	godoc -http=:6060
 
 .PHONY: release

README.md

@@ -2,7 +2,7 @@
     <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://gotenberg.dev/docs/about">Documentation</a> &#183; 🔥 <a href="https://gotenberg.dev/docs/get-started/live-demo">Live Demo</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>
 
 ---
@@ -15,18 +15,18 @@ 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.
 
-Head to the [documentation](https://gotenberg.dev/docs/about) to learn how to interact with it 🚀
+Head to the [documentation](https://gotenberg.dev/docs/getting-started/introduction) to learn how to interact with it 🚀
 
 ## Sponsors
 
@@ -41,5 +41,5 @@ Head to the [documentation](https://gotenberg.dev/docs/about) to learn how to in
 [![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)
+[![Go Reference](https://pkg.go.dev/badge/github.com/gotenberg/gotenberg.svg)](https://pkg.go.dev/github.com/gotenberg/gotenberg/v8)
 [![Codecov](https://codecov.io/gh/gotenberg/gotenberg/branch/main/graph/badge.svg)](https://codecov.io/gh/gotenberg/gotenberg)

SECURITY.md

@@ -0,0 +1,41 @@
+# Security Policy
+
+## Supported Versions
+
+Please ensure to keep your environment up-to-date and use only the latest version of Gotenberg. 
+Security updates and patches will be applied only to the most recent version.
+
+## Reporting a Vulnerability
+
+Your help in identifying vulnerabilities in our project is much appreciated. 
+We take all reports regarding security seriously.
+
+If you discover a security vulnerability, please refrain from publishing it publicly. 
+Instead, kindly send us the details via email to *neuhart [dot] julien [at] gmail [dot] com*.
+
+In the subject of your email, please indicate that it's a security vulnerability report for Gotenberg. 
+In your message, please include:
+
+* A detailed description of the vulnerability.
+* The steps to reproduce the issue.
+* Any potential impact of the vulnerability on the users or system.
+
+Please remember that this process is done in a *'best-effort'* manner. 
+This means we strive to respond and act as quickly as possible, but the speed may vary depending on the severity of
+the issue and our resources.
+
+Thank you in advance for helping to keep our project safe!
+
+## Disclosure Policy
+
+Once we have received your vulnerability report, we will work to validate and reproduce the issue. 
+If we can confirm the vulnerability, we will proceed to:
+
+* Work on a fix and a release timeline.
+* Notify you when the fix has been implemented and released.
+* Credit you for discovering the vulnerability (unless you request anonymity).
+* Please note that we will do our best to keep you informed about the progress towards resolving the issue.
+
+## Comments on this Policy
+
+If you have suggestions on how this process could be improved, please submit a pull request.

build/Dockerfile

@@ -1,11 +1,14 @@
-# Note: ARG instructions do not create additional layers.
-# Instead, next layers will concatenate them.
+# ARG instructions do not create additional layers. Instead, next layers will
+# concatenate them. Also, we have to repeat ARG instructions in each build
+# stage that uses them.
 ARG GOLANG_VERSION
-# Note: we have to repeat ARG instructions in each build stage that uses them.
+
+# ----------------------------------------------
+# Gotenberg binary build stage
+# ----------------------------------------------
+FROM golang:$GOLANG_VERSION AS binary-stage
+
 ARG GOTENBERG_VERSION
-
-FROM golang:$GOLANG_VERSION AS builder
-
 ENV CGO_ENABLED 0
 
 # Define the working directory outside of $GOPATH (we're using go modules).
@@ -21,40 +24,26 @@ RUN go mod download &&\
 COPY cmd ./cmd
 COPY pkg ./pkg
 
-# Build the binary.
-ARG GOTENBERG_VERSION
+RUN go build -o gotenberg -ldflags "-X 'github.com/gotenberg/gotenberg/v8/cmd.Version=$GOTENBERG_VERSION'" cmd/gotenberg/main.go
 
-RUN go build -o gotenberg -ldflags "-X 'github.com/gotenberg/gotenberg/v7/cmd.Version=$GOTENBERG_VERSION'" cmd/gotenberg/main.go
-
-FROM debian:11-slim
+# ----------------------------------------------
+# Final stage
+# ----------------------------------------------
+FROM debian:12-slim
 
 ARG GOTENBERG_VERSION
-
-LABEL author="Julien Neuhart" \
-      description="A Docker-powered stateless API for PDF files." \
-      github="https://github.com/gotenberg/gotenberg" \
-      version="$GOTENBERG_VERSION" \
-      website="https://gotenberg.dev"
-
-# Improve fonts subpixel hinting and smoothing.
-# Credits:
-# https://github.com/arachnys/athenapdf/issues/69.
-# https://github.com/arachnys/athenapdf/commit/ba25a8d80a25d08d58865519c4cd8756dc9a336d.
-COPY build/fonts.conf /etc/fonts/conf.d/100-gotenberg.conf
-
-# Simple wrapper around Java and PDFtk.
-COPY build/pdftk.sh /usr/bin/pdftk
-
-# Setup the Docker image.
 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"
 
-# Script for installing either Google Chrome stable on amd64 architecture or
-# Chromium on other architectures.
-# See https://github.com/gotenberg/gotenberg/issues/328.
-COPY build/install-chromium.sh /tmp/install-chromium.sh
+LABEL org.opencontainers.image.title="Gotenberg" \
+      org.opencontainers.image.description="A Docker-powered stateless API for PDF files." \
+      org.opencontainers.image.version="$GOTENBERG_VERSION" \
+      org.opencontainers.image.authors="Julien Neuhart <neuhart.julien@gmail.com>" \
+      org.opencontainers.image.documentation="https://gotenberg.dev" \
+      org.opencontainers.image.source="https://github.com/gotenberg/gotenberg"
 
 RUN \
     # Create a non-root user.
@@ -62,19 +51,28 @@ RUN \
     groupadd --gid "$GOTENBERG_USER_GID" gotenberg &&\
     useradd --uid "$GOTENBERG_USER_UID" --gid gotenberg --shell /bin/bash --home /home/gotenberg --no-create-home gotenberg &&\
     mkdir /home/gotenberg &&\
-    chown gotenberg: /home/gotenberg &&\
-    # Install dependencies required for the next instructions or debugging.
+    chown gotenberg: /home/gotenberg
+
+RUN \
+    # Install system dependencies required for the next instructions or debugging.
     # Note: tini is a helper for reaping zombie processes.
     apt-get update -qq &&\
-    DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends curl gnupg htop tini python3 default-jre-headless &&\
-    ln -s /usr/bin/htop /usr/bin/top &&\
+    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.
+    # Therefore, there is no need for apt-get clean.
+    # See https://stackoverflow.com/a/24417119/3248473.
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN \
     # Install fonts.
     # Credits:
     # https://github.com/arachnys/athenapdf/blob/master/cli/Dockerfile.
     # https://help.accusoft.com/PrizmDoc/v12.1/HTML/Installing_Asian_Fonts_on_Ubuntu_and_Debian.html.
-    curl -o ./ttf-mscorefonts-installer_3.8_all.deb http://httpredir.debian.org/debian/pool/contrib/m/msttcorefonts/ttf-mscorefonts-installer_3.8_all.deb &&\
+    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 &&\
     DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends \
-    ./ttf-mscorefonts-installer_3.8_all.deb \
+    ./ttf-mscorefonts-installer_3.8.1_all.deb \
     culmus \
     fonts-beng \
     fonts-hosny-amiri \
@@ -109,67 +107,96 @@ RUN \
     fonts-noto-ui-core \
     fonts-sil-gentium \
     fonts-sil-gentium-basic &&\
-    rm -f ./ttf-mscorefonts-installer_3.8_all.deb &&\
+    rm -f ./ttf-mscorefonts-installer_3.8.1_all.deb &&\
     # Add Color and Black-and-White Noto emoji font.
     # Credits:
     # https://github.com/gotenberg/gotenberg/pull/325.
     # https://github.com/googlefonts/noto-emoji.
     curl -Ls "https://github.com/googlefonts/noto-emoji/raw/$NOTO_COLOR_EMOJI_VERSION/fonts/NotoColorEmoji.ttf" -o /usr/local/share/fonts/NotoColorEmoji.ttf &&\
-    # Install Google Chrome / Chromium.
-    /tmp/install-chromium.sh &&\
-    # Install LibreOffice.
-    DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends libreoffice &&\
-    # Next lines are not currently relevant, as latest versions of LibreOffice
-    # (i.e., > 7.0.4) are causing troubles.
-    # See:
-    # https://packages.debian.org/search?keywords=libreoffice.
-    # https://github.com/gotenberg/gotenberg/issues/442.
-    # https://github.com/gotenberg/gotenberg/issues/516.
-    # https://github.com/gotenberg/gotenberg/issues/529.
-    # https://github.com/gotenberg/gotenberg/issues/537.
-    # https://github.com/gotenberg/gotenberg/issues/568.
-        # Note: we use the bullseye-backports distribution to get the latest LibreOffice version.
-        # See:
-        # https://github.com/gotenberg/gotenberg/pull/322.
-        # https://github.com/gotenberg/gotenberg/issues/403.
-        #echo "deb https://httpredir.debian.org/debian/ bullseye-backports main contrib non-free" >> /etc/apt/sources.list &&\
-        #apt-get update -qq &&\
-        #DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends -t bullseye-backports libreoffice &&\
-    # Download unoconv (Python script).
-    curl -Ls https://raw.githubusercontent.com/dagwieers/unoconv/master/unoconv -o /usr/bin/unoconv &&\
-    chmod +x /usr/bin/unoconv &&\
-    # unoconv will look for the Python binary, which has to be at version 3.
+    # Cleanup.
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+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 &&\
+      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 [[ "$(dpkg --print-architecture)" == "armhf" ]]; then \
+      apt-get update -qq &&\
+      DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends devscripts &&\
+      debsnap chromium-common "$TMP_CHOMIUM_VERSION_ARMHF" -v --force --binary --architecture armhf &&\
+      debsnap chromium "$TMP_CHOMIUM_VERSION_ARMHF" -v --force --binary --architecture armhf &&\
+      DEBIAN_FRONTEND=noninteractive apt-get install --fix-broken -y -qq --no-install-recommends "./binary-chromium-common/chromium-common_${TMP_CHOMIUM_VERSION_ARMHF}_armhf.deb" "./binary-chromium/chromium_${TMP_CHOMIUM_VERSION_ARMHF}_armhf.deb" &&\
+      DEBIAN_FRONTEND=noninteractive apt-get purge -y -qq devscripts &&\
+      rm -rf ./binary-chromium-common/* ./binary-chromium/*; \
+    else \
+      apt-get update -qq &&\
+      DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends chromium; \
+    fi' &&\
+    # Verify installation.
+    chromium --version &&\
+    # Cleanup.
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN \
+    # Install LibreOffice & unoconverter.
+    echo "deb http://deb.debian.org/debian bookworm-backports main" >> /etc/apt/sources.list &&\
+    apt-get update -qq &&\
+    DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends -t bookworm-backports libreoffice &&\
+    curl -Ls https://raw.githubusercontent.com/gotenberg/unoconverter/v0.0.1/unoconv -o /usr/bin/unoconverter &&\
+    chmod +x /usr/bin/unoconverter &&\
+    # unoconverter will look for the Python binary, which has to be at version 3.
     ln -s /usr/bin/python3 /usr/bin/python &&\
-    # Download PDFtk.
-    # See https://github.com/gotenberg/gotenberg/pull/273. \
+    # Verify installations.
+    libreoffice --version &&\
+    unoconverter --version &&\
+    # Cleanup.
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN \
+    # Install PDFtk, QPDF & ExifTool (PDF engines).
+    # See https://github.com/gotenberg/gotenberg/pull/273.
     curl -o /usr/bin/pdftk-all.jar "https://gitlab.com/api/v4/projects/5024297/packages/generic/pdftk-java/$PDFTK_VERSION/pdftk-all.jar" &&\
     chmod a+x /usr/bin/pdftk-all.jar &&\
-    # Download QPDF.
-    DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends qpdf &&\
+    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 exiftool &&\
     # See https://github.com/nextcloud/docker/issues/380.
     mkdir -p /usr/share/man/man1 &&\
-    # Cleanup.
-    # Note: the Debian image does automatically a clean after each install thanks to a hook.
-    # Therefore, there is no need for apt-get clean.
-    # See https://stackoverflow.com/a/24417119/3248473.
-    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* &&\
-    # Print versions of main dependencies.
-    chromium --version &&\
-    libreoffice --version &&\
-    unoconv --version &&\
+    # Verify installations.
     pdftk --version &&\
-    qpdf --version
+    qpdf --version &&\
+    exiftool --version &&\
+    # Cleanup.
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
-# Copy the Gotenberg binary from the builder stage.
-COPY --from=builder /home/gotenberg /usr/bin/
+# Improve fonts subpixel hinting and smoothing.
+# Credits:
+# https://github.com/arachnys/athenapdf/issues/69.
+# 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/
 
 # Environment variables required by modules or else.
-ENV GC_EXCLUDE_SUBSTR "hsperfdata_root,hsperfdata_gotenberg"
 ENV CHROMIUM_BIN_PATH /usr/bin/chromium
-ENV UNOCONV_BIN_PATH /usr/bin/unoconv
 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
 
 USER gotenberg
 WORKDIR /home/gotenberg

build/Dockerfile.cloudrun

@@ -1,5 +1,3 @@
-# Note: ARG instructions do not create additional layers.
-# Instead, next layers will concatenate them.
 ARG DOCKER_REPOSITORY
 ARG GOTENBERG_VERSION
 

build/install-chromium.sh

@@ -1,15 +0,0 @@
-#!/bin/bash
-
-set -e
-
-ARCH=$(dpkg --print-architecture)
-
-if [[ "$ARCH" == "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
-  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
-else
-  DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends chromium
-fi

build/pdftk.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-exec java -jar /usr/bin/pdftk-all.jar "$@"

cmd/gotenberg.go

@@ -5,11 +5,13 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
+	"syscall"
 	"time"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	flag "github.com/spf13/pflag"
 	"golang.org/x/sync/errgroup"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 // See https://patorjk.com/software/taag/#p=display&f=Small%20Slant&t=Gotenberg.
@@ -73,7 +75,6 @@ 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)
@@ -82,7 +83,6 @@ func Run() {
 			startupMessage := app.StartupMessage()
 			if startupMessage == "" {
 				fmt.Printf("[SYSTEM] %s: application started\n", id)
-
 				return
 			}
 
@@ -109,8 +109,8 @@ func Run() {
 
 	quit := make(chan os.Signal, 1)
 
-	// We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C).
-	signal.Notify(quit, os.Interrupt)
+	// We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C) or SIGTERM (Kubernetes).
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
 
 	// Block until we receive our signal.
 	<-quit
@@ -119,7 +119,7 @@ func Run() {
 	defer cancel()
 
 	forceQuit := make(chan os.Signal, 1)
-	signal.Notify(forceQuit, os.Interrupt)
+	signal.Notify(forceQuit, syscall.SIGINT)
 
 	go func() {
 		// In case of force quit, cancel the context.
@@ -142,7 +142,6 @@ func Run() {
 				}
 
 				fmt.Printf("[SYSTEM] %s: application stopped\n", id)
-
 				return nil
 			}
 		}(a.(gotenberg.App)))

cmd/gotenberg/main.go

@@ -1,10 +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

@@ -1,730 +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
-
-  /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
-
-  /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
-
-  /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
-
-  /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
-
-  /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
-
-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

go.mod

@@ -1,42 +1,44 @@
-module github.com/gotenberg/gotenberg/v7
+module github.com/gotenberg/gotenberg/v8
 
-go 1.19
+go 1.21
 
 require (
-	github.com/alexliesenfeld/health v0.6.0
-	github.com/andybalholm/brotli v1.0.4 // indirect
-	github.com/chromedp/cdproto v0.0.0-20230109101555-6b041c6303cc
-	github.com/chromedp/chromedp v0.8.7
+	github.com/alexliesenfeld/health v0.8.0
+	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/barasher/go-exiftool v1.10.0
+	github.com/chromedp/cdproto v0.0.0-20240312231614-1e5096e63154
+	github.com/chromedp/chromedp v0.9.5
 	github.com/golang/snappy v0.0.4 // indirect
-	github.com/google/uuid v1.3.0
+	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-retryablehttp v0.7.2
-	github.com/klauspost/compress v1.15.14 // indirect
-	github.com/klauspost/pgzip v1.2.5 // indirect
-	github.com/labstack/echo/v4 v4.10.0
-	github.com/labstack/gommon v0.4.0
-	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.5
+	github.com/klauspost/compress v1.17.7 // indirect
+	github.com/klauspost/pgzip v1.2.6 // indirect
+	github.com/labstack/echo/v4 v4.11.4
+	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 v1.0.21
+	github.com/microcosm-cc/bluemonday v1.0.26
 	github.com/nwaples/rardecode v1.1.3 // indirect
-	github.com/pdfcpu/pdfcpu v0.3.13
-	github.com/pierrec/lz4/v4 v4.1.17 // indirect
-	github.com/prometheus/client_golang v1.14.0
+	github.com/pdfcpu/pdfcpu v0.7.0
+	github.com/pierrec/lz4/v4 v4.1.21 // indirect
+	github.com/prometheus/client_golang v1.19.0
 	github.com/russross/blackfriday/v2 v2.1.0
 	github.com/spf13/pflag v1.0.5
 	github.com/ulikunitz/xz v0.5.11 // indirect
-	go.uber.org/atomic v1.10.0 // indirect
-	go.uber.org/multierr v1.9.0
-	go.uber.org/zap v1.24.0
-	golang.org/x/crypto v0.5.0 // indirect
-	golang.org/x/image v0.3.0 // indirect
-	golang.org/x/net v0.5.0
-	golang.org/x/sync v0.1.0
-	golang.org/x/sys v0.4.0 // indirect
-	golang.org/x/term v0.4.0
-	golang.org/x/text v0.6.0
+	go.uber.org/multierr v1.11.0
+	go.uber.org/zap v1.27.0
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/image v0.15.0 // indirect
+	golang.org/x/net v0.22.0
+	golang.org/x/sync v0.6.0
+	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/term v0.18.0
+	golang.org/x/text v0.14.0
 )
 
+require github.com/dlclark/regexp2 v1.11.0
+
 require (
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
@@ -45,23 +47,22 @@ require (
 	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
-	github.com/gobwas/ws v1.1.0 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/gorilla/css v1.0.0 // indirect
-	github.com/hhrutter/lzw v0.0.0-20190829144645-6f07a24e8650 // indirect
-	github.com/hhrutter/tiff v0.0.0-20190829141212-736cae8d0bc7 // indirect
+	github.com/gobwas/ws v1.3.2 // 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/kr/pretty v0.3.1 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
-	github.com/prometheus/common v0.39.0 // indirect
-	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/prometheus/client_model v0.6.0 // indirect
+	github.com/prometheus/common v0.51.0 // indirect
+	github.com/prometheus/procfs v0.13.0 // indirect
+	github.com/rivo/uniseg v0.4.7 // 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 v1.28.1 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -1,25 +1,28 @@
-github.com/alexliesenfeld/health v0.6.0 h1:HRBTCgybNSe4lqGEk7nU82c3bjwh9W+3b46W6UvD4CQ=
-github.com/alexliesenfeld/health v0.6.0/go.mod h1:N4NDIeQtlWumG+6z1ne1v62eQxktz5ylEgGgH9emdMw=
+github.com/alexliesenfeld/health v0.8.0 h1:lCV0i+ZJPTbqP7LfKG7p3qZBl5VhelwUFCIVWl77fgk=
+github.com/alexliesenfeld/health v0.8.0/go.mod h1:TfNP0f+9WQVWMQRzvMUjlws4ceXKEL3WR+6Hp95HUFc=
 github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
-github.com/andybalholm/brotli v1.0.4 h1:V7DdXeJtZscaqfNuAdSRuRFzuiKlHSC/Zh3zl9qY3JY=
-github.com/andybalholm/brotli v1.0.4/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
+github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
+github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
 github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
 github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4=
-github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/barasher/go-exiftool v1.10.0 h1:f5JY5jc42M7tzR6tbL9508S2IXdIcG9QyieEXNMpIhs=
+github.com/barasher/go-exiftool v1.10.0/go.mod h1:F9s/a3uHSM8YniVfwF+sbQUtP8Gmh9nyzigNF+8vsWo=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/chromedp/cdproto v0.0.0-20230109101555-6b041c6303cc h1:pgBIUnhrsNh0Xi+8qUdHIP/nljIVz3laeRv23eqr45M=
-github.com/chromedp/cdproto v0.0.0-20230109101555-6b041c6303cc/go.mod h1:GKljq0VrfU4D5yc+2qA6OVr8pmO/MBbPEWqWQ/oqGEs=
-github.com/chromedp/chromedp v0.8.7 h1:dYOYc5ynTBzwSLOi+1IfgHwPr8r2BqV48l/RC+3OuJ0=
-github.com/chromedp/chromedp v0.8.7/go.mod h1:iL+ywnwk3eG3EVXV1ackXBMNzdEh3Ye/KHvQkq1KRKU=
+github.com/chromedp/cdproto v0.0.0-20240202021202-6d0b6a386732/go.mod h1:GKljq0VrfU4D5yc+2qA6OVr8pmO/MBbPEWqWQ/oqGEs=
+github.com/chromedp/cdproto v0.0.0-20240312231614-1e5096e63154 h1:jeAmkzyOAQBPRmZMhX+i/CJv0VViLkHk1nF0qx8s0Mk=
+github.com/chromedp/cdproto v0.0.0-20240312231614-1e5096e63154/go.mod h1:GKljq0VrfU4D5yc+2qA6OVr8pmO/MBbPEWqWQ/oqGEs=
+github.com/chromedp/chromedp v0.9.5 h1:viASzruPJOiThk7c5bueOUY91jGLJVximoEMGoH93rg=
+github.com/chromedp/chromedp v0.9.5/go.mod h1:D4I2qONslauw/C7INoCir1BJkSwBYMyZgx8X276z3+Y=
 github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
 github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
+github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 h1:iFaUwBSo5Svw6L7HYpRu/0lE3e0BaElwnNO1qkNQxBY=
 github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5/go.mod h1:qssHWj60/X5sZFNxpG4HBPDHVqxNm4DfnCKgrbZOT+s=
 github.com/dsnet/golib v0.0.0-20171103203638-1ea166775780/go.mod h1:Lj+Z9rebOhdfkVLjJ8T6VcRQv3SXugXy999NBtR9aFY=
@@ -27,170 +30,139 @@ github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
 github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
-github.com/gobwas/ws v1.1.0 h1:7RFti/xnNkMJnrK7D1yQ/iCIB5OrrY/54/H930kIbHA=
-github.com/gobwas/ws v1.1.0/go.mod h1:nzvNcVha5eUziGrbxFCo6qFIojQHjJV5cLYIbezhfL0=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
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 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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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 v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
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 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=
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 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 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

@@ -13,43 +13,43 @@ import (
 	"go.uber.org/zap"
 )
 
-// Cmd wraps an exec.Cmd.
+// Cmd wraps an [exec.Cmd].
 type Cmd struct {
 	ctx     context.Context
 	logger  *zap.Logger
 	process *exec.Cmd
 }
 
-// Command creates a Cmd without a context. It configures the internal
-// exec.Cmd of Cmd so that we may kill its unix process and all its children
-// without creating orphans.
+// Command creates a [Cmd] without a context. It configures the internal
+// [exec.Cmd] of [Cmd] so that we may kill its unix process and all its
+// children without creating orphans.
 //
 // See https://medium.com/@felixge/killing-a-child-process-and-all-of-its-children-in-go-54079af94773.
-func Command(logger *zap.Logger, binPath string, args ...string) Cmd {
+func Command(logger *zap.Logger, binPath string, args ...string) *Cmd {
 	cmd := exec.Command(binPath, args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 
-	return Cmd{
+	return &Cmd{
 		ctx:     nil,
 		logger:  logger.Named(strings.ReplaceAll(binPath, "/", "")),
 		process: cmd,
 	}
 }
 
-// CommandContext creates a Cmd with a context. It configures the internal
-// exec.Cmd of Cmd so that we may kill its unix process and all its children
-// without creating orphans.
+// CommandContext creates a [Cmd] with a context. It configures the internal
+// [exec.Cmd] of [Cmd] so that we may kill its unix process and all its
+// children without creating orphans.
 //
 // See https://medium.com/@felixge/killing-a-child-process-and-all-of-its-children-in-go-54079af94773.
-func CommandContext(ctx context.Context, logger *zap.Logger, binPath string, args ...string) (Cmd, error) {
+func CommandContext(ctx context.Context, logger *zap.Logger, binPath string, args ...string) (*Cmd, error) {
 	if ctx == nil {
-		return Cmd{}, errors.New("nil context")
+		return nil, errors.New("nil context")
 	}
 
 	cmd := exec.CommandContext(ctx, binPath, args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 
-	return Cmd{
+	return &Cmd{
 		ctx:     ctx,
 		logger:  logger.Named(strings.ReplaceAll(binPath, "/", "")),
 		process: cmd,
@@ -57,7 +57,7 @@ func CommandContext(ctx context.Context, logger *zap.Logger, binPath string, arg
 }
 
 // Start starts the command but does not wait for its completion.
-func (cmd Cmd) Start() error {
+func (cmd *Cmd) Start() error {
 	err := cmd.pipeOutput()
 	if err != nil {
 		return fmt.Errorf("pipe unix process output: %w", err)
@@ -75,7 +75,7 @@ func (cmd Cmd) Start() error {
 
 // Wait waits for the command to complete. It should be called when using the
 // Start method, so that the command does not leak zombies.
-func (cmd Cmd) Wait() error {
+func (cmd *Cmd) Wait() error {
 	err := cmd.process.Wait()
 	if err != nil {
 		return fmt.Errorf("wait for unix process: %w", err)
@@ -86,7 +86,7 @@ func (cmd Cmd) Wait() error {
 
 // Exec executes the command and wait for its completion or until the context
 // is done. In any case, it kills the unix process and all its children.
-func (cmd Cmd) Exec() (int, error) {
+func (cmd *Cmd) Exec() (int, error) {
 	if cmd.ctx == nil {
 		return 10, errors.New("nil context")
 	}
@@ -134,7 +134,7 @@ func (cmd Cmd) Exec() (int, error) {
 
 // pipeOutput creates logs entries according to the process stdout and stderr.
 // It does nothing if the logging level is not debug.
-func (cmd Cmd) pipeOutput() error {
+func (cmd *Cmd) pipeOutput() error {
 	checkedEntry := cmd.logger.Check(zap.DebugLevel, "check for debug level before piping unix process output")
 	if checkedEntry == nil {
 		return nil
@@ -154,11 +154,15 @@ func (cmd Cmd) pipeOutput() error {
 	// (either stdout or stderr).
 	logCommandOutput := func(logger *zap.Logger, reader io.ReadCloser) {
 		r := bufio.NewReader(reader)
-		defer reader.Close()
+		defer func(reader io.ReadCloser) {
+			err := reader.Close()
+			if err != nil {
+				logger.Error(fmt.Sprintf("close reader: %s", err))
+			}
+		}(reader)
 
 		for {
 			line, _, err := r.ReadLine()
-
 			if err != nil {
 				if err != io.EOF && !strings.Contains(err.Error(), "file already closed") {
 					logger.Error(fmt.Sprintf("pipe unix process output error: %s", err))
@@ -182,7 +186,7 @@ func (cmd Cmd) pipeOutput() error {
 // Kill kills the unix process and all its children without creating orphans.
 //
 // See https://medium.com/@felixge/killing-a-child-process-and-all-of-its-children-in-go-54079af94773.
-func (cmd Cmd) Kill() error {
+func (cmd *Cmd) Kill() error {
 	if cmd.process == nil {
 		// We cannot use the logger here, because for whatever reason using it
 		// result to a panic.

pkg/gotenberg/cmd_test.go

@@ -10,7 +10,6 @@ import (
 
 func TestCommand(t *testing.T) {
 	cmd := Command(zap.NewNop(), "foo")
-
 	if !cmd.process.SysProcAttr.Setpgid {
 		t.Error("expected cmd.process.SysProcAttr.Setpgid to be true")
 	}
@@ -18,34 +17,36 @@ func TestCommand(t *testing.T) {
 
 func TestCommandContext(t *testing.T) {
 	tests := []struct {
-		name                    string
-		ctx                     context.Context
-		expectCommandContextErr bool
+		scenario                  string
+		ctx                       context.Context
+		expectCommandContextError bool
 	}{
 		{
-			name: "nominal behavior",
-			ctx:  context.Background(),
+			scenario:                  "nominal behavior",
+			ctx:                       context.Background(),
+			expectCommandContextError: false,
 		},
 		{
-			name:                    "nil context",
-			expectCommandContextErr: true,
+			scenario:                  "nil context",
+			ctx:                       nil,
+			expectCommandContextError: true,
 		},
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+		t.Run(tc.scenario, func(t *testing.T) {
 			cmd, err := CommandContext(tc.ctx, zap.NewNop(), "foo")
 
 			if err == nil && !cmd.process.SysProcAttr.Setpgid {
 				t.Fatal("expected cmd.process.SysProcAttr.Setpgid to be true")
 			}
 
-			if tc.expectCommandContextErr && err == nil {
-				t.Error("expected error from CommandContext(), but got none")
+			if !tc.expectCommandContextError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectCommandContextErr && err != nil {
-				t.Errorf("expected no error from CommandContext(), but got: %v", err)
+			if tc.expectCommandContextError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
@@ -53,31 +54,32 @@ func TestCommandContext(t *testing.T) {
 
 func TestCmd_Start(t *testing.T) {
 	tests := []struct {
-		name           string
-		cmd            Cmd
-		expectStartErr bool
+		scenario         string
+		cmd              *Cmd
+		expectStartError bool
 	}{
 		{
-			name: "nominal behavior",
-			cmd:  Command(zap.NewNop(), "echo", "Hello", "World"),
+			scenario:         "nominal behavior",
+			cmd:              Command(zap.NewNop(), "echo", "Hello", "World"),
+			expectStartError: false,
 		},
 		{
-			name:           "start error",
-			cmd:            Command(zap.NewNop(), "foo"),
-			expectStartErr: true,
+			scenario:         "start error",
+			cmd:              Command(zap.NewNop(), "foo"),
+			expectStartError: true,
 		},
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+		t.Run(tc.scenario, func(t *testing.T) {
 			err := tc.cmd.Start()
 
-			if tc.expectStartErr && err == nil {
-				t.Error("expected error from cmd.Start(), but got none")
+			if !tc.expectStartError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectStartErr && err != nil {
-				t.Errorf("expected no error from cmd.Start(), but got: %v", err)
+			if tc.expectStartError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
@@ -85,54 +87,50 @@ func TestCmd_Start(t *testing.T) {
 
 func TestCmd_Wait(t *testing.T) {
 	tests := []struct {
-		name          string
-		cmd           Cmd
-		expectWaitErr bool
+		scenario        string
+		cmd             *Cmd
+		expectWaitError bool
 	}{
 		{
-			name: "nominal behavior",
-			cmd: func() Cmd {
+			scenario: "nominal behavior",
+			cmd: func() *Cmd {
 				cmd := Command(zap.NewNop(), "echo", "Hello", "World")
-
 				err := cmd.Start()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.Start(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
+			expectWaitError: false,
 		},
 		{
-			name: "wait error",
-			cmd: func() Cmd {
+			scenario: "wait error",
+			cmd: func() *Cmd {
 				cmd := Command(zap.NewNop(), "echo", "Hello", "World")
-
 				err := cmd.Start()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.Start(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				err = cmd.Kill()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.Kill(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
-			expectWaitErr: true,
+			expectWaitError: true,
 		},
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+		t.Run(tc.scenario, func(t *testing.T) {
 			err := tc.cmd.Wait()
 
-			if tc.expectWaitErr && err == nil {
-				t.Error("expected error from cmd.Wait(), but got none")
+			if !tc.expectWaitError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectWaitErr && err != nil {
-				t.Errorf("expected no error from cmd.Wait(), but got: %v", err)
+			if tc.expectWaitError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
@@ -140,49 +138,48 @@ func TestCmd_Wait(t *testing.T) {
 
 func TestCmd_Exec(t *testing.T) {
 	tests := []struct {
-		name          string
-		cmd           Cmd
-		timeout       time.Duration
-		expectExecErr bool
+		scenario        string
+		cmd             *Cmd
+		timeout         time.Duration
+		expectExecError bool
 	}{
 		{
-			name: "nominal behavior",
-			cmd: func() Cmd {
+			scenario: "nominal behavior",
+			cmd: func() *Cmd {
 				cmd, err := CommandContext(context.Background(), zap.NewNop(), "echo", "Hello", "World")
 				if err != nil {
 					t.Fatalf("expected no error from CommandContext(), but got: %v", err)
 				}
-
 				return cmd
 			}(),
+			expectExecError: false,
 		},
 		{
-			name:          "nil context",
-			cmd:           Command(zap.NewNop(), "echo", "Hello", "World"),
-			expectExecErr: true,
+			scenario:        "nil context",
+			cmd:             Command(zap.NewNop(), "echo", "Hello", "World"),
+			expectExecError: true,
 		},
 		{
-			name: "start error",
-			cmd: func() Cmd {
+			scenario: "start error",
+			cmd: func() *Cmd {
 				cmd, err := CommandContext(context.Background(), zap.NewNop(), "foo")
 				if err != nil {
-					t.Fatalf("expected no error from CommandContext(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
-			expectExecErr: true,
+			expectExecError: true,
 		},
 		{
-			name:          "context done",
-			cmd:           Command(zap.NewNop(), "sleep", "2"),
-			timeout:       time.Duration(1) * time.Second,
-			expectExecErr: true,
+			scenario:        "context done",
+			cmd:             Command(zap.NewNop(), "sleep", "2"),
+			timeout:         time.Duration(1) * time.Second,
+			expectExecError: true,
 		},
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.timeout > 0 {
 				ctx, cancel := context.WithTimeout(context.TODO(), tc.timeout)
 				defer cancel()
@@ -192,12 +189,12 @@ func TestCmd_Exec(t *testing.T) {
 
 			_, err := tc.cmd.Exec()
 
-			if tc.expectExecErr && err == nil {
-				t.Error("expected error from cmd.Exec(), but got none")
+			if !tc.expectExecError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectExecErr && err != nil {
-				t.Errorf("expected no error from cmd.Exec(), but got: %v", err)
+			if tc.expectExecError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
@@ -205,67 +202,68 @@ func TestCmd_Exec(t *testing.T) {
 
 func TestCmd_pipeOutput(t *testing.T) {
 	tests := []struct {
-		name                string
-		cmd                 Cmd
-		run                 bool
-		expectPipeOutputErr bool
+		scenario              string
+		cmd                   *Cmd
+		run                   bool
+		expectPipeOutputError bool
 	}{
 		{
-			name: "nominal behavior",
-			cmd:  Command(zap.NewExample(), "echo", "Hello", "World"),
-			run:  true,
+			scenario:              "nominal behavior",
+			cmd:                   Command(zap.NewExample(), "echo", "Hello", "World"),
+			run:                   true,
+			expectPipeOutputError: false,
 		},
 		{
-			name: "no debug, no pipe",
-			cmd:  Command(zap.NewNop(), "echo", "Hello", "World"),
+			scenario:              "no debug, no pipe",
+			cmd:                   Command(zap.NewNop(), "echo", "Hello", "World"),
+			run:                   false,
+			expectPipeOutputError: false,
 		},
 		{
-			name: "stdout already piped",
-			cmd: func() Cmd {
+			scenario: "stdout already piped",
+			cmd: func() *Cmd {
 				cmd := Command(zap.NewExample(), "echo", "Hello", "World")
-
 				_, err := cmd.process.StdoutPipe()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.process.StdoutPipe(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
-			expectPipeOutputErr: true,
+			run:                   false,
+			expectPipeOutputError: true,
 		},
 		{
-			name: "stderr already piped",
-			cmd: func() Cmd {
+			scenario: "stderr already piped",
+			cmd: func() *Cmd {
 				cmd := Command(zap.NewExample(), "echo", "Hello", "World")
-
 				_, err := cmd.process.StderrPipe()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.process.StderrPipe(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
-			expectPipeOutputErr: true,
+			run:                   false,
+			expectPipeOutputError: true,
 		},
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+		t.Run(tc.scenario, func(t *testing.T) {
 			err := tc.cmd.pipeOutput()
 
 			if tc.run {
 				errStart := tc.cmd.process.Start()
 				if errStart != nil {
-					t.Fatalf("expected no error from tc.cmd.process.Start(), but got: %v", errStart)
+					t.Fatalf("expected no error but got: %v", err)
 				}
 			}
 
-			if tc.expectPipeOutputErr && err == nil {
-				t.Error("expected error from cmd.pipeOutput(), but got none")
+			if !tc.expectPipeOutputError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectPipeOutputErr && err != nil {
-				t.Errorf("expected no error from cmd.pipeOutput(), but got: %v", err)
+			if tc.expectPipeOutputError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
@@ -273,51 +271,46 @@ func TestCmd_pipeOutput(t *testing.T) {
 
 func TestCmd_Kill(t *testing.T) {
 	tests := []struct {
-		name string
-		cmd  Cmd
+		scenario string
+		cmd      *Cmd
 	}{
 		{
-			name: "nominal behavior",
-			cmd: func() Cmd {
+			scenario: "nominal behavior",
+			cmd: func() *Cmd {
 				cmd := Command(zap.NewNop(), "sleep", "60")
-
 				err := cmd.process.Start()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.process.Start(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
 		},
 		{
-			name: "no process",
-			cmd:  Cmd{logger: zap.NewNop()},
+			scenario: "no process",
+			cmd:      &Cmd{logger: zap.NewNop()},
 		},
 		{
-			name: "process already killed",
-			cmd: func() Cmd {
+			scenario: "process already killed",
+			cmd: func() *Cmd {
 				cmd := Command(zap.NewNop(), "sleep", "60")
-
 				err := cmd.process.Start()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.process.Start(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				err = cmd.Kill()
 				if err != nil {
-					t.Fatalf("expected no error from cmd.Kill(), but got: %v", err)
+					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				return cmd
 			}(),
 		},
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+		t.Run(tc.scenario, func(t *testing.T) {
 			err := tc.cmd.Kill()
 			if err != nil {
-				t.Errorf("expected no error from cmd.Kill(), but got: %v", err)
+				t.Fatalf("expected no error but got: %v", err)
 			}
 		})
 	}

pkg/gotenberg/context.go

@@ -5,7 +5,7 @@ import (
 	"reflect"
 )
 
-// Context is a struct which helps initializing modules. When provisioning, a
+// Context is a struct which helps to initialize modules. When provisioning, a
 // module may use the context to get other modules that it needs internally.
 type Context struct {
 	flags           ParsedFlags
@@ -13,8 +13,8 @@ type Context struct {
 	moduleInstances map[string]interface{}
 }
 
-// NewContext creates a Context.
-// In a module, prefer the Provisioner interface to get a Context.
+// NewContext creates a [Context].
+// In a module, prefer the [Provisioner] interface to get a [Context].
 func NewContext(
 	flags ParsedFlags,
 	descriptors []ModuleDescriptor,
@@ -32,7 +32,7 @@ func NewContext(
 //		flags := ctx.ParsedFlags()
 //		m.foo = flags.RequiredString("foo")
 //	}
-func (ctx Context) ParsedFlags() ParsedFlags {
+func (ctx *Context) ParsedFlags() ParsedFlags {
 	return ctx.flags
 }
 
@@ -47,7 +47,6 @@ func (ctx Context) ParsedFlags() ParsedFlags {
 // initializes it. Otherwise, returns the already initialized instance.
 func (ctx *Context) Module(kind interface{}) (interface{}, error) {
 	mods, err := ctx.Modules(kind)
-
 	if err != nil {
 		return nil, fmt.Errorf("get module: %w", err)
 	}
@@ -101,7 +100,7 @@ func (ctx *Context) Modules(kind interface{}) ([]interface{}, error) {
 }
 
 // loadModule calls the Provision and/or Validate methods of the requested
-// module if it satisfies the Provisioner and/or Validator interfaces.
+// module if it satisfies the [Provisioner] and/or [Validator] interfaces.
 func (ctx *Context) loadModule(id string, instance interface{}) error {
 	if prov, ok := instance.(Provisioner); ok {
 		// The instance can be provisioned.

pkg/gotenberg/context_test.go

@@ -23,173 +23,212 @@ func TestContext_ParsedFlags(t *testing.T) {
 }
 
 func TestContext_Module(t *testing.T) {
-	for i, tc := range []struct {
-		mods      []ModuleDescriptor
-		kind      interface{}
-		expectErr bool
+	for _, tc := range []struct {
+		scenario    string
+		mods        []ModuleDescriptor
+		kind        interface{}
+		expectError bool
 	}{
 		{
+			scenario: "module with error on provision",
 			mods: func() []ModuleDescriptor {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return errors.New("foo") }
-
+				mod.ProvisionMock = func(ctx *Context) error { return errors.New("foo") }
 				return []ModuleDescriptor{mod.Descriptor()}
 			}(),
-			kind:      new(Provisioner),
-			expectErr: true,
+			kind:        new(Provisioner),
+			expectError: true,
 		},
 		{
+			scenario: "two modules instead of one",
 			mods: func() []ModuleDescriptor {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return nil }
-
+				mod.ProvisionMock = func(ctx *Context) error { return nil }
 				return []ModuleDescriptor{mod.Descriptor(), mod.Descriptor()}
 			}(),
-			kind:      new(Provisioner),
-			expectErr: true,
+			kind:        new(Provisioner),
+			expectError: true,
 		},
 		{
+			scenario: "success",
 			mods: func() []ModuleDescriptor {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return nil }
-
+				mod.ProvisionMock = func(ctx *Context) error { return nil }
 				return []ModuleDescriptor{mod.Descriptor()}
 			}(),
-			kind: new(Provisioner),
+			kind:        new(Provisioner),
+			expectError: false,
 		},
 	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			ctx := NewContext(ParsedFlags{}, tc.mods)
+			_, err := ctx.Module(tc.kind)
 
-		ctx := NewContext(ParsedFlags{}, tc.mods)
-		_, err := ctx.Module(tc.kind)
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
-
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
 	}
 }
 
 func TestContext_Modules(t *testing.T) {
-	for i, tc := range []struct {
-		mods      []ModuleDescriptor
-		kind      interface{}
-		expectErr bool
+	for _, tc := range []struct {
+		scenario    string
+		mods        []ModuleDescriptor
+		kind        interface{}
+		expectError bool
 	}{
 		{
+			scenario: "module with error on provision",
 			mods: func() []ModuleDescriptor {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return errors.New("foo") }
-
+				mod.ProvisionMock = func(ctx *Context) error { return errors.New("foo") }
 				return []ModuleDescriptor{mod.Descriptor()}
 			}(),
-			kind:      new(Provisioner),
-			expectErr: true,
+			kind:        new(Provisioner),
+			expectError: true,
 		},
 		{
+			scenario: "success (module)",
 			mods: func() []ModuleDescriptor {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return nil }
-
+				mod.ProvisionMock = func(ctx *Context) error { return nil }
 				return []ModuleDescriptor{mod.Descriptor(), mod.Descriptor()}
 			}(),
-			kind: new(Provisioner),
+			kind:        new(Provisioner),
+			expectError: false,
 		},
 		{
+			scenario: "success (one module)",
 			mods: func() []ModuleDescriptor {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return nil }
+				mod.ProvisionMock = func(ctx *Context) error { return nil }
 
 				return []ModuleDescriptor{mod.Descriptor()}
 			}(),
-			kind: new(Provisioner),
+			kind:        new(Provisioner),
+			expectError: false,
 		},
 	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			ctx := NewContext(ParsedFlags{}, tc.mods)
+			_, err := ctx.Modules(tc.kind)
 
-		ctx := NewContext(ParsedFlags{}, tc.mods)
-		_, err := ctx.Modules(tc.kind)
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
-
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
 	}
 }
 
 func TestContext_loadModule(t *testing.T) {
-	for i, tc := range []struct {
-		instance  interface{}
-		expectErr bool
+	for _, tc := range []struct {
+		scenario    string
+		instance    interface{}
+		expectError bool
 	}{
 		{
+			scenario: "module with error on provision",
 			instance: func() interface{} {
-				mod := struct{ ProtoProvisioner }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ProvisionerMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.provision = func(ctx *Context) error { return errors.New("foo") }
-
+				mod.ProvisionMock = func(ctx *Context) error { return errors.New("foo") }
 				return mod
 			}(),
-			expectErr: true,
+			expectError: true,
 		},
 		{
+			scenario: "module with error on validation",
 			instance: func() interface{} {
-				mod := struct{ ProtoValidator }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ValidatorMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.validate = func() error { return errors.New("foo") }
-
+				mod.ValidateMock = func() error { return errors.New("foo") }
 				return mod
 			}(),
-			expectErr: true,
+			expectError: true,
 		},
 		{
+			scenario: "success",
 			instance: func() interface{} {
-				mod := struct{ ProtoValidator }{}
-				mod.descriptor = func() ModuleDescriptor {
+				mod := &struct {
+					ModuleMock
+					ValidatorMock
+				}{}
+				mod.DescriptorMock = func() ModuleDescriptor {
 					return ModuleDescriptor{ID: "foo", New: func() Module { return mod }}
 				}
-				mod.validate = func() error { return nil }
+				mod.ValidateMock = func() error { return nil }
 
 				return mod
 			}(),
+			expectError: false,
 		},
 	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			ctx := NewContext(ParsedFlags{}, nil)
+			err := ctx.loadModule("foo", tc.instance)
 
-		ctx := NewContext(ParsedFlags{}, nil)
-		err := ctx.loadModule("foo", tc.instance)
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
-
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
 	}
 }

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

@@ -1,14 +1,14 @@
 package gotenberg
 
 import (
-	"regexp"
 	"time"
 
+	"github.com/dlclark/regexp2"
 	"github.com/labstack/gommon/bytes"
 	flag "github.com/spf13/pflag"
 )
 
-// ParsedFlags wraps a flag.FlagSet so that retrieving the typed values is
+// ParsedFlags wraps a [flag.FlagSet] so that retrieving the typed values is
 // easier.
 type ParsedFlags struct {
 	*flag.FlagSet
@@ -80,6 +80,28 @@ func (f *ParsedFlags) MustDeprecatedBool(deprecated string, newName string) bool
 	return f.MustBool(newName)
 }
 
+// MustInt64 returns the int64 value of a flag given by name.
+// It panics if an error occurs.
+func (f *ParsedFlags) MustInt64(name string) int64 {
+	val, err := f.GetInt64(name)
+	if err != nil {
+		panic(err)
+	}
+
+	return val
+}
+
+// MustDeprecatedInt64 returns the int64 value of a deprecated flag if it was
+// explicitly set or the int64 value of the new flag.
+// It panics if an error occurs.
+func (f *ParsedFlags) MustDeprecatedInt64(deprecated string, newName string) int64 {
+	if f.Changed(deprecated) {
+		return f.MustInt64(deprecated)
+	}
+
+	return f.MustInt64(newName)
+}
+
 // MustInt returns the int value of a flag given by name.
 // It panics if an error occurs.
 func (f *ParsedFlags) MustInt(name string) int {
@@ -177,19 +199,19 @@ func (f *ParsedFlags) MustDeprecatedHumanReadableBytesString(deprecated string,
 
 // 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

@@ -20,23 +20,27 @@ func TestParsedFlags_MustString(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -44,49 +48,55 @@ func TestParsedFlags_MustString(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustString(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedString(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue string
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=foo"},
 			expectValue: "foo",
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=bar"},
 			expectValue: "bar",
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=foo", "--bar=bar"},
 			expectValue: "foo",
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.String("foo", "", "")
-		fs.String("bar", "", "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.String("foo", "", "")
+			fs.String("bar", "", "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedString("foo", "bar")
-		if actual != tc.expectValue {
-			t.Errorf("test %d: expected '%s' but got '%s'", i, tc.expectValue, actual)
-		}
+			actual := parsedFlags.MustDeprecatedString("foo", "bar")
+			if actual != tc.expectValue {
+				t.Errorf("expected '%s' but got '%s'", tc.expectValue, actual)
+			}
+		})
 	}
 }
 
@@ -101,23 +111,27 @@ func TestParsedFlags_MustStringSlice(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -125,49 +139,55 @@ func TestParsedFlags_MustStringSlice(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustStringSlice(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedStringSlice(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue []string
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=foo"},
 			expectValue: []string{"foo"},
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=bar"},
 			expectValue: []string{"bar"},
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=foo", "--bar=bar"},
 			expectValue: []string{"foo"},
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.StringSlice("foo", make([]string, 0), "")
-		fs.StringSlice("bar", make([]string, 0), "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.StringSlice("foo", make([]string, 0), "")
+			fs.StringSlice("bar", make([]string, 0), "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedStringSlice("foo", "bar")
-		if !reflect.DeepEqual(actual, tc.expectValue) {
-			t.Errorf("test %d: expected %+v but got %+v", i, tc.expectValue, actual)
-		}
+			actual := parsedFlags.MustDeprecatedStringSlice("foo", "bar")
+			if !reflect.DeepEqual(actual, tc.expectValue) {
+				t.Errorf("expected %+v but got %+v", tc.expectValue, actual)
+			}
+		})
 	}
 }
 
@@ -182,23 +202,27 @@ func TestParsedFlags_MustBool(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -206,48 +230,143 @@ func TestParsedFlags_MustBool(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustBool(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedBool(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue bool
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=true"},
 			expectValue: true,
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=false"},
 			expectValue: false,
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=true", "--bar=false"},
 			expectValue: true,
 		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.Bool("foo", false, "")
+			fs.Bool("bar", true, "")
+
+			parsedFlags := ParsedFlags{FlagSet: fs}
+
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			actual := parsedFlags.MustDeprecatedBool("foo", "bar")
+			if actual != tc.expectValue {
+				t.Errorf("expected %v but got %v", tc.expectValue, actual)
+			}
+		})
+	}
+}
+
+func TestParsedFlags_MustInt64(t *testing.T) {
+	fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+	fs.Int64("foo", 0, "")
+
+	err := fs.Parse([]string{"--foo=1"})
+	if err != nil {
+		t.Fatalf("expected no error but got: %v", err)
+	}
+
+	parsedFlags := ParsedFlags{FlagSet: fs}
+
+	for _, tc := range []struct {
+		scenario    string
+		name        string
+		expectPanic bool
+	}{
+		{
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
+		},
+		{
+			scenario:    "non-existing flag",
+			name:        "bar",
+			expectPanic: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			if tc.expectPanic {
+				defer func() {
+					if r := recover(); r == nil {
+						t.Fatal("expected panic but got none")
+					}
+				}()
+			}
+
+			if !tc.expectPanic {
+				defer func() {
+					if r := recover(); r != nil {
+						t.Fatalf("expected no panic but got: %v", r)
+					}
+				}()
+			}
+
+			parsedFlags.MustInt64(tc.name)
+		})
+	}
+}
+
+func TestParsedFlags_MustDeprecatedInt64(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		rawFlags    []string
+		expectValue int64
+	}{
+		{
+			scenario:    "deprecated flag value",
+			rawFlags:    []string{"--foo=1"},
+			expectValue: 1,
+		},
+		{
+			scenario:    "non-deprecated flag value",
+			rawFlags:    []string{"--bar=2"},
+			expectValue: 2,
+		},
+		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
+			rawFlags:    []string{"--foo=1", "--bar=2"},
+			expectValue: 1,
+		},
 	} {
 		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.Bool("foo", false, "")
-		fs.Bool("bar", true, "")
+		fs.Int64("foo", 0, "")
+		fs.Int64("bar", 0, "")
 
 		parsedFlags := ParsedFlags{FlagSet: fs}
 
 		err := parsedFlags.Parse(tc.rawFlags)
 		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
+			t.Fatalf("expected no error but got: %v", err)
 		}
 
-		actual := parsedFlags.MustDeprecatedBool("foo", "bar")
+		actual := parsedFlags.MustDeprecatedInt64("foo", "bar")
 		if actual != tc.expectValue {
-			t.Errorf("test %d: expected %v but got %v", i, tc.expectValue, actual)
+			t.Errorf("expected %d but got %d", tc.expectValue, actual)
 		}
 	}
 }
@@ -263,23 +382,27 @@ func TestParsedFlags_MustInt(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -287,49 +410,55 @@ func TestParsedFlags_MustInt(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustInt(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedInt(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue int
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=1"},
 			expectValue: 1,
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=2"},
 			expectValue: 2,
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=1", "--bar=2"},
 			expectValue: 1,
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.Int("foo", 0, "")
-		fs.Int("bar", 0, "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.Int("foo", 0, "")
+			fs.Int("bar", 0, "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedInt("foo", "bar")
-		if actual != tc.expectValue {
-			t.Errorf("test %d: expected %d but got %d", i, tc.expectValue, actual)
-		}
+			actual := parsedFlags.MustDeprecatedInt("foo", "bar")
+			if actual != tc.expectValue {
+				t.Errorf("expected %d but got %d", tc.expectValue, actual)
+			}
+		})
 	}
 }
 
@@ -344,23 +473,27 @@ func TestParsedFlags_MustFloat64(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -368,49 +501,55 @@ func TestParsedFlags_MustFloat64(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustFloat64(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedFloat64(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue float64
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=1.0"},
 			expectValue: 1.0,
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=2.0"},
 			expectValue: 2.0,
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=1.0", "--bar=2.0"},
 			expectValue: 1.0,
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.Float64("foo", 0, "")
-		fs.Float64("bar", 0, "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.Float64("foo", 0, "")
+			fs.Float64("bar", 0, "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedFloat64("foo", "bar")
-		if actual != tc.expectValue {
-			t.Errorf("test %d: expected %f but got %f", i, tc.expectValue, actual)
-		}
+			actual := parsedFlags.MustDeprecatedFloat64("foo", "bar")
+			if actual != tc.expectValue {
+				t.Errorf("expected %f but got %f", tc.expectValue, actual)
+			}
+		})
 	}
 }
 
@@ -425,23 +564,27 @@ func TestParsedFlags_MustDuration(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -449,49 +592,55 @@ func TestParsedFlags_MustDuration(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustDuration(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedDuration(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue time.Duration
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=1s"},
 			expectValue: time.Duration(1) * time.Second,
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=2s"},
 			expectValue: time.Duration(2) * time.Second,
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=1s", "--bar=2s"},
 			expectValue: time.Duration(1) * time.Second,
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.Duration("foo", 0, "")
-		fs.Duration("bar", 0, "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.Duration("foo", 0, "")
+			fs.Duration("bar", 0, "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedDuration("foo", "bar")
-		if actual != tc.expectValue {
-			t.Errorf("test %d: expected '%s' but got '%s'", i, tc.expectValue, actual)
-		}
+			actual := parsedFlags.MustDeprecatedDuration("foo", "bar")
+			if actual != tc.expectValue {
+				t.Errorf("expected '%s' but got '%s'", tc.expectValue, actual)
+			}
+		})
 	}
 }
 
@@ -507,27 +656,27 @@ func TestParsedFlags_MustHumanReadableBytesString(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
-		{
-			name:        "baz",
-			expectPanic: true,
-		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -535,49 +684,55 @@ func TestParsedFlags_MustHumanReadableBytesString(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustHumanReadableBytesString(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedHumanReadableBytesString(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue string
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=1MB"},
 			expectValue: "1MB",
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=2MB"},
 			expectValue: "2MB",
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=1MB", "--bar=2MB"},
 			expectValue: "1MB",
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.String("foo", "", "")
-		fs.String("bar", "", "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.String("foo", "", "")
+			fs.String("bar", "", "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedHumanReadableBytesString("foo", "bar")
-		if actual != tc.expectValue {
-			t.Errorf("test %d: expected '%s' but got '%s'", i, tc.expectValue, actual)
-		}
+			actual := parsedFlags.MustDeprecatedHumanReadableBytesString("foo", "bar")
+			if actual != tc.expectValue {
+				t.Errorf("expected '%s' but got '%s'", tc.expectValue, actual)
+			}
+		})
 	}
 }
 
@@ -593,27 +748,27 @@ func TestParsedFlags_MustRegexp(t *testing.T) {
 
 	parsedFlags := ParsedFlags{FlagSet: fs}
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		name        string
 		expectPanic bool
 	}{
 		{
-			name: "foo",
+			scenario:    "success",
+			name:        "foo",
+			expectPanic: false,
 		},
 		{
+			scenario:    "non-existing flag",
 			name:        "bar",
 			expectPanic: true,
 		},
-		{
-			name:        "baz",
-			expectPanic: true,
-		},
 	} {
-		func() {
+		t.Run(tc.scenario, func(t *testing.T) {
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Fatal("expected panic but got none")
 					}
 				}()
 			}
@@ -621,48 +776,54 @@ func TestParsedFlags_MustRegexp(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Fatalf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			parsedFlags.MustRegexp(tc.name)
-		}()
+		})
 	}
 }
 
 func TestParsedFlags_MustDeprecatedRegexp(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		rawFlags    []string
 		expectValue *regexp.Regexp
 	}{
 		{
+			scenario:    "deprecated flag value",
 			rawFlags:    []string{"--foo=foo"},
 			expectValue: regexp.MustCompile("foo"),
 		},
 		{
+			scenario:    "non-deprecated flag value",
 			rawFlags:    []string{"--bar=bar"},
 			expectValue: regexp.MustCompile("bar"),
 		},
 		{
+			scenario:    "deprecated flag value > non-deprecated flag value",
 			rawFlags:    []string{"--foo=foo", "--bar=bar"},
 			expectValue: regexp.MustCompile("foo"),
 		},
 	} {
-		fs := flag.NewFlagSet("tests", flag.ContinueOnError)
-		fs.String("foo", "", "")
-		fs.String("bar", "", "")
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := flag.NewFlagSet("tests", flag.ContinueOnError)
+			fs.String("foo", "", "")
+			fs.String("bar", "", "")
 
-		parsedFlags := ParsedFlags{FlagSet: fs}
+			parsedFlags := ParsedFlags{FlagSet: fs}
 
-		err := parsedFlags.Parse(tc.rawFlags)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
+			err := parsedFlags.Parse(tc.rawFlags)
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		actual := parsedFlags.MustDeprecatedRegexp("foo", "bar")
-		if actual.String() != tc.expectValue.String() {
-			t.Errorf("test %d: expected '%s' but got '%s'", i, tc.expectValue.String(), actual.String())
-		}
+			actual := parsedFlags.MustDeprecatedRegexp("foo", "bar")
+			if actual.String() != tc.expectValue.String() {
+				t.Errorf("expected '%s' but got '%s'", tc.expectValue.String(), actual.String())
+			}
+		})
 	}
 }

pkg/gotenberg/fs.go

@@ -7,27 +7,55 @@ import (
 	"github.com/google/uuid"
 )
 
-// TmpPath returns the default directory to use for temporary files and
-// directories. Most if not all files and directories created by the
-// application and its dependencies must be based on this default directory.
-func TmpPath() string {
-	return os.TempDir()
+// 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
 }
 
-// NewDirPath returns a random absolute path based on the temporary path.
-func NewDirPath() string {
-	return fmt.Sprintf("%s/%s", TmpPath(), uuid.New())
+// NewFileSystem initializes a new [FileSystem] instance with a unique working
+// directory.
+func NewFileSystem() *FileSystem {
+	return &FileSystem{
+		workingDir: uuid.NewString(),
+	}
 }
 
-// MkdirAll creates a random directory based on the temporary path and
-// returns its absolute path.
-func MkdirAll() (string, error) {
-	path := NewDirPath()
+// WorkingDir returns the unique name of the working directory.
+func (fs *FileSystem) WorkingDir() string {
+	return fs.workingDir
+}
 
-	err := os.MkdirAll(path, 0755)
+// WorkingDirPath constructs and returns the full path to the working directory
+// inside the system's temporary directory.
+func (fs *FileSystem) WorkingDirPath() string {
+	return fmt.Sprintf("%s/%s", os.TempDir(), fs.workingDir)
+}
+
+// NewDirPath generates a new unique path for a directory inside the working
+// directory.
+func (fs *FileSystem) NewDirPath() string {
+	return fmt.Sprintf("%s/%s", fs.WorkingDirPath(), uuid.NewString())
+}
+
+// MkdirAll creates a new unique directory inside the working directory and
+// returns its path. If the directory creation fails, an error is returned.
+func (fs *FileSystem) MkdirAll() (string, error) {
+	path := fs.NewDirPath()
+
+	err := os.MkdirAll(path, 0o755)
 	if err != nil {
 		return "", fmt.Errorf("create directory %s: %w", path, err)
 	}
 
 	return path, nil
 }
+
+// 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
+}

pkg/gotenberg/fs_test.go

@@ -1,59 +1,55 @@
 package gotenberg
 
 import (
+	"fmt"
 	"os"
 	"strings"
 	"testing"
 )
 
-func TestTmpPath(t *testing.T) {
-	osTempDir := os.TempDir()
-	tmpPath := TmpPath()
+func TestFileSystem_WorkingDir(t *testing.T) {
+	fs := NewFileSystem()
+	dirName := fs.WorkingDir()
 
-	if tmpPath != osTempDir {
-		t.Errorf("expected path '%s' but got '%s'", osTempDir, tmpPath)
+	if dirName == "" {
+		t.Error("expected directory name but got empty string")
 	}
 }
 
-func TestNewDirPath(t *testing.T) {
-	newDirPath := NewDirPath()
-	tmpPath := TmpPath()
+func TestFileSystem_WorkingDirPath(t *testing.T) {
+	fs := NewFileSystem()
+	expectedPath := fmt.Sprintf("%s/%s", os.TempDir(), fs.WorkingDir())
 
-	if !strings.HasPrefix(newDirPath, tmpPath) {
-		t.Fatalf("expected path '%s' to start with '%s'", newDirPath, tmpPath)
-	}
-
-	newDirPaths := make([]string, 1000)
-	for i := range newDirPaths {
-		newDirPaths[i] = NewDirPath()
-	}
-
-	for i, newDirPath := range newDirPaths {
-		for j, comparison := range newDirPaths {
-			if i == j {
-				continue
-			}
-
-			if newDirPath == comparison {
-				t.Fatalf("expected path '%s' (index %d) to be unique, but found an identical path on index %d", newDirPath, i, j)
-			}
-		}
+	if fs.WorkingDirPath() != expectedPath {
+		t.Errorf("expected path '%s' but got '%s'", expectedPath, fs.WorkingDirPath())
 	}
 }
 
-func TestMkdirAll(t *testing.T) {
-	path, err := MkdirAll()
+func TestFileSystem_NewDirPath(t *testing.T) {
+	fs := NewFileSystem()
+	newDir := fs.NewDirPath()
+	expectedPrefix := fs.WorkingDirPath()
+
+	if !strings.HasPrefix(newDir, expectedPrefix) {
+		t.Errorf("expected new directory to start with '%s' but got '%s'", expectedPrefix, newDir)
+	}
+}
+
+func TestFileSystem_MkdirAll(t *testing.T) {
+	fs := NewFileSystem()
+
+	newPath, err := fs.MkdirAll()
 	if err != nil {
 		t.Fatalf("expected no error but got: %v", err)
 	}
 
-	tmpPath := TmpPath()
-	if !strings.HasPrefix(path, tmpPath) {
-		t.Fatalf("expected path '%s' to start with '%s'", path, tmpPath)
+	_, err = os.Stat(newPath)
+	if os.IsNotExist(err) {
+		t.Errorf("expected directory '%s' to exist but it doesn't", newPath)
 	}
 
-	_, err = os.Stat(path)
-	if os.IsNotExist(err) {
-		t.Errorf("expected path '%s' to exist but got: %v", path, err)
+	err = os.RemoveAll(fs.WorkingDirPath())
+	if err != nil {
+		t.Fatalf("expected no error while cleaning up but got: %v", err)
 	}
 }

pkg/gotenberg/gc.go

@@ -0,0 +1,53 @@
+package gotenberg
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"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 {
+	logger = logger.Named("gc")
+
+	// To make sure that the next Walk method stays on
+	// the root level of the considered path, we have to
+	// return a filepath.SkipDir error if the current path
+	// is a directory.
+	skipDirOrNil := func(info os.FileInfo) error {
+		if info.IsDir() {
+			return filepath.SkipDir
+		}
+
+		return nil
+	}
+
+	return filepath.Walk(rootPath, func(path string, info os.FileInfo, pathErr error) error {
+		if pathErr != nil {
+			return pathErr
+		}
+
+		if path == rootPath {
+			return nil
+		}
+
+		for _, substr := range includeSubstr {
+			if strings.Contains(info.Name(), substr) || path == substr {
+				err := os.RemoveAll(path)
+				if err != nil {
+					return fmt.Errorf("garbage collect '%s': %w", path, err)
+				}
+
+				logger.Debug(fmt.Sprintf("'%s' removed", path))
+
+				return skipDirOrNil(info)
+			}
+		}
+
+		return skipDirOrNil(info)
+	})
+}

pkg/gotenberg/gc_test.go

@@ -0,0 +1,98 @@
+package gotenberg
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap"
+)
+
+func TestGarbageCollect(t *testing.T) {
+	for _, tc := range []struct {
+		scenario        string
+		rootPath        string
+		includeSubstr   []string
+		expectError     bool
+		expectNotExists []string
+		expectExists    []string
+	}{
+		{
+			scenario:    "root path does not exist",
+			rootPath:    uuid.NewString(),
+			expectError: true,
+		},
+		{
+			scenario: "remove include substrings",
+			rootPath: 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", 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", 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", path), []byte{1}, 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return path
+			}(),
+			includeSubstr:   []string{"foo", fmt.Sprintf("%s/a_directory/a_bar_file", os.TempDir())},
+			expectError:     false,
+			expectExists:    []string{"a_baz_file"},
+			expectNotExists: []string{"a_foo_file", "a_bar_file"},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			defer func() {
+				err := os.RemoveAll(tc.rootPath)
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up but got: %v", err)
+				}
+			}()
+
+			err := GarbageCollect(zap.NewNop(), tc.rootPath, tc.includeSubstr)
+
+			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
+			}
+
+			for _, name := range tc.expectNotExists {
+				path := fmt.Sprintf("%s/%s", tc.rootPath, name)
+				_, err = os.Stat(path)
+				if !os.IsNotExist(err) {
+					t.Errorf("expected '%s' not to exist but it does: %v", path, err)
+				}
+			}
+
+			for _, name := range tc.expectExists {
+				path := fmt.Sprintf("%s/%s", tc.rootPath, name)
+				_, err = os.Stat(path)
+				if os.IsNotExist(err) {
+					t.Errorf("expected '%s' to exist but it does not: %v", path, err)
+				}
+			}
+		})
+	}
+}

pkg/gotenberg/logging.go

@@ -2,8 +2,8 @@ package gotenberg
 
 import "go.uber.org/zap"
 
-// LoggerProvider is a module interface which exposes a method for creating a
-// zap.Logger for other modules.
+// LoggerProvider is an interface for a module that supplies a method for
+// creating a [zap.Logger] instance for use by other modules.
 //
 //	func (m *YourModule) Provision(ctx *gotenberg.Context) error {
 //		provider, _ := ctx.Module(new(gotenberg.LoggerProvider))

pkg/gotenberg/metrics.go

@@ -15,7 +15,7 @@ type Metric struct {
 	Read func() float64
 }
 
-// MetricsProvider is a module interface which provides a list of Metric.
+// MetricsProvider is a module interface which provides a list of [Metric].
 //
 //	func (m *YourModule) Provision(ctx *gotenberg.Context) error {
 //		provider, _ := ctx.Module(new(gotenberg.MetricsProvider))

pkg/gotenberg/mocks.go

@@ -6,61 +6,154 @@ import (
 	"go.uber.org/zap"
 )
 
-// ModuleMock is a mock for the Module interface.
+// ModuleMock is a mock for the [Module] interface.
 type ModuleMock struct {
 	DescriptorMock func() ModuleDescriptor
 }
 
-func (mod ModuleMock) Descriptor() ModuleDescriptor {
+func (mod *ModuleMock) Descriptor() ModuleDescriptor {
 	return mod.DescriptorMock()
 }
 
-// ValidatorMock is a mock for the Validator interface.
+// ProvisionerMock is a mock for the [Provisioner] interface.
+type ProvisionerMock struct {
+	ProvisionMock func(*Context) error
+}
+
+func (mod *ProvisionerMock) Provision(ctx *Context) error {
+	return mod.ProvisionMock(ctx)
+}
+
+// ValidatorMock is a mock for the [Validator] interface.
 type ValidatorMock struct {
 	ValidateMock func() error
 }
 
-func (mod ValidatorMock) Validate() error {
+func (mod *ValidatorMock) Validate() error {
 	return mod.ValidateMock()
 }
 
-// PDFEngineMock is a mock for the PDFEngine interface.
-type PDFEngineMock struct {
-	MergeMock   func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error
-	ConvertMock func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error
+// PdfEngineMock is a mock for the [PdfEngine] interface.
+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
+	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 {
+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) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-	return engine.ConvertMock(ctx, logger, format, inputPath, outputPath)
+func (engine *PdfEngineMock) Convert(ctx context.Context, logger *zap.Logger, formats PdfFormats, inputPath, outputPath string) error {
+	return engine.ConvertMock(ctx, logger, formats, inputPath, outputPath)
 }
 
-// PDFEngineProviderMock is a mock for the PDFEngineProvider interface.
-type PDFEngineProviderMock struct {
-	PDFEngineMock func() (PDFEngine, error)
+func (engine *PdfEngineMock) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+	return engine.ReadMetadataMock(ctx, logger, inputPath)
 }
 
-func (provider PDFEngineProviderMock) PDFEngine() (PDFEngine, error) {
-	return provider.PDFEngineMock()
+func (engine *PdfEngineMock) WriteMetadata(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+	return engine.WriteMetadataMock(ctx, logger, metadata, inputPath)
 }
 
-// LoggerProviderMock is a mock for the LoggerProvider interface.
+// PdfEngineProviderMock is a mock for the [PdfEngineProvider] interface.
+type PdfEngineProviderMock struct {
+	PdfEngineMock func() (PdfEngine, error)
+}
+
+func (provider *PdfEngineProviderMock) PdfEngine() (PdfEngine, error) {
+	return provider.PdfEngineMock()
+}
+
+// ProcessMock is a mock for the [Process] interface.
+type ProcessMock struct {
+	StartMock   func(logger *zap.Logger) error
+	StopMock    func(logger *zap.Logger) error
+	HealthyMock func(logger *zap.Logger) bool
+}
+
+func (p *ProcessMock) Start(logger *zap.Logger) error {
+	return p.StartMock(logger)
+}
+
+func (p *ProcessMock) Stop(logger *zap.Logger) error {
+	return p.StopMock(logger)
+}
+
+func (p *ProcessMock) Healthy(logger *zap.Logger) bool {
+	return p.HealthyMock(logger)
+}
+
+// ProcessSupervisorMock is a mock for the [ProcessSupervisor] interface.
+type ProcessSupervisorMock struct {
+	LaunchMock        func() error
+	ShutdownMock      func() error
+	HealthyMock       func() bool
+	RunMock           func(ctx context.Context, logger *zap.Logger, task func() error) error
+	ReqQueueSizeMock  func() int64
+	RestartsCountMock func() int64
+}
+
+func (s *ProcessSupervisorMock) Launch() error {
+	return s.LaunchMock()
+}
+
+func (s *ProcessSupervisorMock) Shutdown() error {
+	return s.ShutdownMock()
+}
+
+func (s *ProcessSupervisorMock) Healthy() bool {
+	return s.HealthyMock()
+}
+
+func (s *ProcessSupervisorMock) Run(ctx context.Context, logger *zap.Logger, task func() error) error {
+	return s.RunMock(ctx, logger, task)
+}
+
+func (s *ProcessSupervisorMock) ReqQueueSize() int64 {
+	return s.ReqQueueSizeMock()
+}
+
+func (s *ProcessSupervisorMock) RestartsCount() int64 {
+	return s.RestartsCountMock()
+}
+
+// LoggerProviderMock is a mock for the [LoggerProvider] interface.
 type LoggerProviderMock struct {
 	LoggerMock func(mod Module) (*zap.Logger, error)
 }
 
-func (provider LoggerProviderMock) Logger(mod Module) (*zap.Logger, error) {
+func (provider *LoggerProviderMock) Logger(mod Module) (*zap.Logger, error) {
 	return provider.LoggerMock(mod)
 }
 
+// MetricsProviderMock is a mock for the [MetricsProvider] interface.
+type MetricsProviderMock struct {
+	MetricsMock func() ([]Metric, error)
+}
+
+func (provider *MetricsProviderMock) Metrics() ([]Metric, error) {
+	return provider.MetricsMock()
+}
+
+// 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)
 	_ Validator         = (*ValidatorMock)(nil)
-	_ PDFEngine         = (*PDFEngineMock)(nil)
-	_ PDFEngineProvider = (*PDFEngineProviderMock)(nil)
+	_ PdfEngine         = (*PdfEngineMock)(nil)
+	_ PdfEngineProvider = (*PdfEngineProviderMock)(nil)
+	_ Process           = (*ProcessMock)(nil)
+	_ ProcessSupervisor = (*ProcessSupervisorMock)(nil)
 	_ LoggerProvider    = (*LoggerProviderMock)(nil)
+	_ MetricsProvider   = (*MetricsProviderMock)(nil)
 )

pkg/gotenberg/mocks_test.go

@@ -8,7 +8,7 @@ import (
 )
 
 func TestModuleMock(t *testing.T) {
-	mock := ModuleMock{
+	mock := &ModuleMock{
 		DescriptorMock: func() ModuleDescriptor {
 			return ModuleDescriptor{ID: "foo", New: func() Module {
 				return nil
@@ -17,12 +17,25 @@ func TestModuleMock(t *testing.T) {
 	}
 
 	if mock.Descriptor().ID != "foo" {
-		t.Errorf("expected ID '%s' from mock.Descriptor(), but got '%s'", "foo", mock.Descriptor().ID)
+		t.Errorf("expected ID '%s' from ModuleMock.Descriptor, but got '%s'", "foo", mock.Descriptor().ID)
+	}
+}
+
+func TestProvisionerMock(t *testing.T) {
+	mock := &ProvisionerMock{
+		ProvisionMock: func(*Context) error {
+			return nil
+		},
+	}
+
+	err := mock.Provision(&Context{})
+	if err != nil {
+		t.Errorf("expected no error from ProvisionerMock.Provision, but got: %v", err)
 	}
 }
 
 func TestValidatorMock(t *testing.T) {
-	mock := ValidatorMock{
+	mock := &ValidatorMock{
 		ValidateMock: func() error {
 			return nil
 		},
@@ -30,53 +43,177 @@ func TestValidatorMock(t *testing.T) {
 
 	err := mock.Validate()
 	if err != nil {
-		t.Errorf("expected no error from mock.Validate(), but got: %v", err)
+		t.Errorf("expected no error from ValidatorMock.Validate, but got: %v", err)
 	}
 }
 
 func TestPDFEngineMock(t *testing.T) {
-	mock := PDFEngineMock{
+	mock := &PdfEngineMock{
 		MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 			return nil
 		},
-		ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+		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, "")
 	if err != nil {
-		t.Errorf("expected no error from mock.Merge(), but got: %v", err)
+		t.Errorf("expected no error from PdfEngineMock.Merge, but got: %v", err)
 	}
 
-	err = mock.Convert(context.Background(), zap.NewNop(), "", "", "")
+	err = mock.Convert(context.Background(), zap.NewNop(), PdfFormats{}, "", "")
 	if err != nil {
-		t.Errorf("expected no error from mock.Convert(), but got: %v", err)
+		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 TestPDFEngineProvider(t *testing.T) {
-	mock := PDFEngineProviderMock{
-		PDFEngineMock: func() (PDFEngine, error) {
-			return PDFEngineMock{}, nil
+func TestPDFEngineProviderMock(t *testing.T) {
+	mock := &PdfEngineProviderMock{
+		PdfEngineMock: func() (PdfEngine, error) {
+			return new(PdfEngineMock), nil
 		},
 	}
 
-	_, err := mock.PDFEngine()
+	_, err := mock.PdfEngine()
 	if err != nil {
-		t.Errorf("expected no error from mock.PDFEngine(), but got: %v", err)
+		t.Errorf("expected no error from PdfEngineProviderMock.PdfEngine, but got: %v", err)
+	}
+}
+
+func TestProcessMock(t *testing.T) {
+	mock := &ProcessMock{
+		StartMock: func(logger *zap.Logger) error {
+			return nil
+		},
+		StopMock: func(logger *zap.Logger) error {
+			return nil
+		},
+		HealthyMock: func(logger *zap.Logger) bool {
+			return true
+		},
+	}
+
+	err := mock.Start(zap.NewNop())
+	if err != nil {
+		t.Errorf("expected no error from ProcessMock.Start, but got: %v", err)
+	}
+
+	err = mock.Stop(zap.NewNop())
+	if err != nil {
+		t.Errorf("expected no error from ProcessMock.Stop, but got: %v", err)
+	}
+
+	healthy := mock.Healthy(zap.NewNop())
+	if !healthy {
+		t.Error("expected true from ProcessMock.Healthy, but got false")
+	}
+}
+
+func TestProcessSupervisorMock(t *testing.T) {
+	mock := &ProcessSupervisorMock{
+		LaunchMock: func() error {
+			return nil
+		},
+		ShutdownMock: func() error {
+			return nil
+		},
+		HealthyMock: func() bool {
+			return true
+		},
+		RunMock: func(ctx context.Context, logger *zap.Logger, task func() error) error {
+			return nil
+		},
+		ReqQueueSizeMock: func() int64 {
+			return 0
+		},
+		RestartsCountMock: func() int64 {
+			return 0
+		},
+	}
+
+	err := mock.Launch()
+	if err != nil {
+		t.Errorf("expected no error from ProcessSupervisorMock.Launch, but got: %v", err)
+	}
+
+	err = mock.Shutdown()
+	if err != nil {
+		t.Errorf("expected no error from ProcessSupervisorMock.Shutdown, but got: %v", err)
+	}
+
+	healthy := mock.Healthy()
+	if !healthy {
+		t.Error("expected true from ProcessSupervisorMock.Healthy, but got false")
+	}
+
+	err = mock.Run(context.TODO(), zap.NewNop(), nil)
+	if err != nil {
+		t.Errorf("expected no error from ProcessSupervisorMock.Run, but got: %v", err)
+	}
+
+	size := mock.ReqQueueSize()
+	if size != 0 {
+		t.Errorf("expected 0 from ProcessSupervisorMock.ReqQueueSize, but got: %d", size)
+	}
+
+	restarts := mock.RestartsCount()
+	if restarts != 0 {
+		t.Errorf("expected 0 from ProcessSupervisorMock.RestartsCount, but got: %d", restarts)
 	}
 }
 
 func TestLoggerProviderMock(t *testing.T) {
-	mock := LoggerProviderMock{
+	mock := &LoggerProviderMock{
 		LoggerMock: func(mod Module) (*zap.Logger, error) {
 			return nil, nil
 		},
 	}
 
-	_, err := mock.Logger(ModuleMock{})
+	_, err := mock.Logger(new(ModuleMock))
 	if err != nil {
-		t.Errorf("expected no error from mock.Logger(), but got: %v", err)
+		t.Errorf("expected no error from LoggerProviderMock.Logger, but got: %v", err)
+	}
+}
+
+func TestMetricsProviderMock(t *testing.T) {
+	mock := &MetricsProviderMock{
+		MetricsMock: func() ([]Metric, error) {
+			return nil, nil
+		},
+	}
+
+	_, err := mock.Metrics()
+	if err != nil {
+		t.Errorf("expected no error from MetricsProviderMock.Metrics, 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/modules_test.go

@@ -5,32 +5,6 @@ import (
 	"testing"
 )
 
-type ProtoModule struct {
-	descriptor func() ModuleDescriptor
-}
-
-func (mod ProtoModule) Descriptor() ModuleDescriptor {
-	return mod.descriptor()
-}
-
-type ProtoProvisioner struct {
-	ProtoModule
-	provision func(ctx *Context) error
-}
-
-func (mod ProtoProvisioner) Provision(ctx *Context) error {
-	return mod.provision(ctx)
-}
-
-type ProtoValidator struct {
-	ProtoModule
-	validate func() error
-}
-
-func (mod ProtoValidator) Validate() error {
-	return mod.validate()
-}
-
 func TestMustRegisterModule(t *testing.T) {
 	descriptorsMu.RLock()
 	descriptors = map[string]ModuleDescriptor{
@@ -38,44 +12,51 @@ func TestMustRegisterModule(t *testing.T) {
 	}
 	descriptorsMu.RUnlock()
 
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		ID          string
 		New         func() Module
 		expectPanic bool
 	}{
 		{
+			scenario:    "no ID",
 			ID:          "",
-			New:         func() Module { return new(ProtoModule) },
+			New:         func() Module { return new(ModuleMock) },
 			expectPanic: true,
 		},
 		{
+			scenario:    "nil New method",
 			ID:          "b",
 			New:         nil,
 			expectPanic: true,
 		},
 		{
+			scenario:    "nil module",
 			ID:          "b",
 			New:         func() Module { return nil },
 			expectPanic: true,
 		},
 		{
+			scenario:    "existing module",
 			ID:          "a",
-			New:         func() Module { return new(ProtoModule) },
+			New:         func() Module { return new(ModuleMock) },
 			expectPanic: true,
 		},
 		{
-			ID:  "b",
-			New: func() Module { return new(ProtoModule) },
+			scenario:    "success",
+			ID:          "b",
+			New:         func() Module { return new(ModuleMock) },
+			expectPanic: false,
 		},
 	} {
-		func() {
-			mod := struct{ ProtoModule }{}
-			mod.descriptor = func() ModuleDescriptor { return ModuleDescriptor{ID: tc.ID, New: tc.New} }
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := &struct{ ModuleMock }{}
+			mod.DescriptorMock = func() ModuleDescriptor { return ModuleDescriptor{ID: tc.ID, New: tc.New} }
 
 			if tc.expectPanic {
 				defer func() {
 					if r := recover(); r == nil {
-						t.Errorf("test %d: expected panic but got none", i)
+						t.Error("expected panic but got none")
 					}
 				}()
 			}
@@ -83,13 +64,13 @@ func TestMustRegisterModule(t *testing.T) {
 			if !tc.expectPanic {
 				defer func() {
 					if r := recover(); r != nil {
-						t.Errorf("test %d: expected no panic but got: %v", i, r)
+						t.Errorf("expected no panic but got: %v", r)
 					}
 				}()
 			}
 
 			MustRegisterModule(mod)
-		}()
+		})
 	}
 
 	descriptorsMu.RLock()
@@ -124,12 +105,3 @@ func TestGetModuleDescriptors(t *testing.T) {
 	descriptors = make(map[string]ModuleDescriptor)
 	descriptorsMu.RUnlock()
 }
-
-// Interface guards.
-var (
-	_ Module      = (*ProtoModule)(nil)
-	_ Provisioner = (*ProtoProvisioner)(nil)
-	_ Module      = (*ProtoProvisioner)(nil)
-	_ Validator   = (*ProtoValidator)(nil)
-	_ Module      = (*ProtoValidator)(nil)
-)

pkg/gotenberg/pdfengine.go

@@ -8,45 +8,84 @@ import (
 )
 
 var (
-	// ErrPDFEngineMethodNotAvailable happens if a PDFEngine method is not
-	// available in the implementation.
-	ErrPDFEngineMethodNotAvailable = errors.New("method not available")
+	// ErrPdfEngineMethodNotSupported is returned when a specific method of the
+	// PdfEngine interface is not supported by its current implementation.
+	ErrPdfEngineMethodNotSupported = errors.New("method not supported")
 
-	// ErrPDFFormatNotAvailable happens if a PDFEngine Convert's method does
-	// not handle a specific format.
-	ErrPDFFormatNotAvailable = errors.New("PDF format not available")
+	// 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 (
-	FormatPDFA1a string = "PDF/A-1a"
-	FormatPDFA1b string = "PDF/A-1b"
-	FormatPDFA2a string = "PDF/A-2a"
-	FormatPDFA2b string = "PDF/A-2b"
-	FormatPDFA2u string = "PDF/A-2u"
-	FormatPDFA3a string = "PDF/A-3a"
-	FormatPDFA3b string = "PDF/A-3b"
-	FormatPDFA3u string = "PDF/A-3u"
+	// PdfA1a represents the PDF/A-1a format.
+	PdfA1a string = "PDF/A-1a"
+
+	// PdfA1b represents the PDF/A-1b format.
+	PdfA1b string = "PDF/A-1b"
+
+	// PdfA2a represents the PDF/A-2a format.
+	PdfA2a string = "PDF/A-2a"
+
+	// PdfA2b represents the PDF/A-2b format.
+	PdfA2b string = "PDF/A-2b"
+
+	// PdfA2u represents the PDF/A-2u format.
+	PdfA2u string = "PDF/A-2u"
+
+	// PdfA3a represents the PDF/A-3a format.
+	PdfA3a string = "PDF/A-3a"
+
+	// PdfA3b represents the PDF/A-3b format.
+	PdfA3b string = "PDF/A-3b"
+
+	// PdfA3u represents the PDF/A-3u format.
+	PdfA3u string = "PDF/A-3u"
 )
 
-// PDFEngine is a module interface which exposes methods for manipulating one
-// or more PDFs. Implementations may abstract powerful tools like PDFtk, or
-// fulfill those methods contracts in Golang directly.
-type PDFEngine interface {
-	// Merge merges the given PDFs into a unique PDF. The pages' order reflects
-	// order of the given files.
+// PdfFormats specifies the target formats for a PDF conversion.
+type PdfFormats struct {
+	// PdfA denotes the PDF/A standard format (e.g., PDF/A-1a).
+	PdfA string
+
+	// PdfUa indicates whether the PDF should comply
+	// with the PDF/UA (Universal Accessibility) standard.
+	PdfUa bool
+}
+
+// PdfEngine provides an interface for operations on PDFs. Implementations
+// can utilize various tools like PDFtk, or implement functionality directly in
+// Go.
+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
 
-	// Convert converts the given PDF to a specific PDF format.
-	Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath 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 is a module interface which exposes a method for creating a
-// PDFEngine for other modules.
+// PdfEngineProvider offers an interface to instantiate a [PdfEngine].
+// This is used to decouple the creation of a [PdfEngine] from its consumers.
+//
+// Example:
 //
 //	func (m *YourModule) Provision(ctx *gotenberg.Context) error {
-//		provider, _  := ctx.Module(new(gotenberg.PDFEngineProvider))
-//		pdfengines, _ := provider.(gotenberg.PDFEngineProvider).PDFEngine()
+//		provider, _ := ctx.Module(new(gotenberg.PdfEngineProvider))
+//		engine, _ := provider.(gotenberg.PdfEngineProvider).PdfEngine()
 //	}
-type PDFEngineProvider interface {
-	PDFEngine() (PDFEngine, error)
+type PdfEngineProvider interface {
+	// PdfEngine returns an instance of the [PdfEngine] interface for PDF operations.
+	PdfEngine() (PdfEngine, error)
 }

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

@@ -0,0 +1,273 @@
+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.
+//
+// Implementations of this interface should handle the actual logic for
+// starting, stopping, and ensuring the process's health.
+type Process interface {
+	// Start initiates the process and returns an error if the process cannot
+	// be started.
+	Start(logger *zap.Logger) error
+
+	// Stop terminates the process and returns an error if the process cannot
+	// be stopped.
+	Stop(logger *zap.Logger) error
+
+	// Healthy checks the health of the process. It returns true if the process
+	// is healthy; otherwise, it returns false.
+	Healthy(logger *zap.Logger) bool
+}
+
+// ProcessSupervisor provides methods to manage a [Process], including
+// starting, stopping, and ensuring its health.
+//
+// Additionally, it allows for the execution of tasks while managing the
+// process's state and provides functionality for limiting the number of
+// requests that can be handled by the process, as well as managing a request
+// queue.
+type ProcessSupervisor interface {
+	// Launch starts the managed [Process].
+	Launch() error
+
+	// Shutdown stops the managed [Process].
+	Shutdown() error
+
+	// Healthy checks and returns the health status of the managed [Process].
+	//
+	// If the process has not been started or is restarting, it is considered
+	// healthy and true is returned. Otherwise, it returns the health status of
+	// the actual process.
+	Healthy() bool
+
+	// Run executes a provided task while managing the state of the [Process].
+	//
+	// Run manages the request queue and may restart the process if it is not
+	// healthy or if the number of handled requests exceeds the maximum limit.
+	//
+	// It returns an error if the task cannot be run or if the process state
+	// cannot be managed properly.
+	Run(ctx context.Context, logger *zap.Logger, task func() error) error
+
+	// ReqQueueSize returns the current size of the request queue.
+	ReqQueueSize() int64
+
+	// RestartsCount returns the current number of restart.
+	RestartsCount() int64
+}
+
+type processSupervisor struct {
+	logger          *zap.Logger
+	process         Process
+	maxReqLimit     int64
+	maxQueueSize    int64
+	mutexChan       chan struct{}
+	firstStart      atomic.Bool
+	reqCounter      atomic.Int64
+	reqQueueSize    atomic.Int64
+	restartsCounter atomic.Int64
+	isRestarting    atomic.Bool
+}
+
+// NewProcessSupervisor initializes a new [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,
+		maxQueueSize: maxQueueSize,
+	}
+	b.reqCounter.Store(0)
+	b.reqQueueSize.Store(0)
+	b.restartsCounter.Store(0)
+	b.isRestarting.Store(false)
+
+	return b
+}
+
+func (s *processSupervisor) Launch() error {
+	s.logger.Debug("start process")
+	err := s.process.Start(s.logger)
+	if err != nil {
+		return fmt.Errorf("start process: %w", err)
+	}
+
+	s.firstStart.Store(true)
+	s.logger.Debug("process successfully started")
+
+	return nil
+}
+
+func (s *processSupervisor) Shutdown() error {
+	s.logger.Debug("shutdown process")
+	err := s.process.Stop(s.logger)
+	if err != nil {
+		return fmt.Errorf("shutdown process: %w", err)
+	}
+
+	s.logger.Debug("process successfully shutdown")
+
+	return nil
+}
+
+func (s *processSupervisor) restart() error {
+	if s.isRestarting.Load() {
+		s.logger.Debug("process already restarting, skip restart")
+
+		return ErrProcessAlreadyRestarting
+	}
+
+	s.logger.Debug("restart process")
+	s.isRestarting.Store(true)
+	defer s.isRestarting.Store(false)
+
+	err := s.Shutdown()
+	if err != nil {
+		// No big deal? Chances are it's already stopped.
+		s.logger.Debug(fmt.Sprintf("stop process before restart: %s", err))
+	}
+
+	err = s.Launch()
+	if err != nil {
+		return fmt.Errorf("restart process: %w", err)
+	}
+
+	s.reqCounter.Store(0)
+	s.restartsCounter.Add(1)
+	s.logger.Debug("process successfully restarted")
+
+	return nil
+}
+
+func (s *processSupervisor) Healthy() bool {
+	if !s.firstStart.Load() {
+		// A non-started process is always healthy.
+		return true
+	}
+
+	if s.isRestarting.Load() {
+		// A restarting process is always healthy.
+		return true
+	}
+
+	return s.process.Healthy(s.logger)
+}
+
+func (s *processSupervisor) Run(ctx context.Context, logger *zap.Logger, task func() error) error {
+	currentQueueSize := s.reqQueueSize.Load()
+	if s.maxQueueSize > 0 && currentQueueSize >= s.maxQueueSize {
+		return ErrMaximumQueueSizeExceeded
+	}
+
+	s.reqQueueSize.Add(1)
+
+	for {
+		err := func() error {
+			select {
+			case s.mutexChan <- struct{}{}:
+				logger.Debug("process lock acquired")
+				s.reqQueueSize.Add(-1)
+				s.reqCounter.Add(1)
+
+				defer func() {
+					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)
+					}
+				}
+
+				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)
+					}
+				}
+
+				// Note: 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())
+			}
+		}()
+
+		if errors.Is(err, ErrProcessAlreadyRestarting) {
+			logger.Debug("process is already restarting, trying to acquire process lock again...")
+			s.reqQueueSize.Add(1)
+			continue
+		}
+
+		// Note: no error wrapping because it leaks on Chromium console exceptions output.
+		return err
+	}
+}
+
+func (s *processSupervisor) runWithDeadline(ctx context.Context, task func() error) error {
+	runChan := make(chan error, 1)
+	go func() {
+		runChan <- task()
+	}()
+
+	for {
+		select {
+		case err := <-runChan:
+			return err
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	}
+}
+
+func (s *processSupervisor) ReqQueueSize() int64 {
+	return s.reqQueueSize.Load()
+}
+
+func (s *processSupervisor) RestartsCount() int64 {
+	return s.restartsCounter.Load()
+}
+
+// Interface guards.
+var (
+	_ ProcessSupervisor = (*processSupervisor)(nil)
+)

pkg/gotenberg/supervisor_test.go

@@ -0,0 +1,635 @@
+package gotenberg
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+)
+
+func TestProcessSupervisor_Launch(t *testing.T) {
+	for _, tc := range []struct {
+		scenario      string
+		startError    error
+		expectError   bool
+		firstStartSet bool
+	}{
+		{
+			scenario:      "successful launch",
+			startError:    nil,
+			expectError:   false,
+			firstStartSet: true,
+		},
+		{
+			scenario:      "failed launch",
+			startError:    errors.New("start error"),
+			expectError:   true,
+			firstStartSet: false,
+		},
+		{
+			scenario:      "process already started",
+			startError:    nil,
+			expectError:   false,
+			firstStartSet: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			process := &ProcessMock{
+				StartMock: func(logger *zap.Logger) error {
+					return tc.startError
+				},
+			}
+
+			ps := NewProcessSupervisor(logger, process, 5, 0).(*processSupervisor)
+			if tc.firstStartSet {
+				ps.firstStart.Store(true)
+			}
+
+			err := ps.Launch()
+
+			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.firstStartSet && !ps.firstStart.Load() {
+				t.Error("expected firstStart to be set but it was not")
+			}
+		})
+	}
+}
+
+func TestProcessSupervisor_Shutdown(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		stopError   error
+		expectError bool
+	}{
+		{
+			scenario:    "successful shutdown",
+			stopError:   nil,
+			expectError: false,
+		},
+		{
+			scenario:    "failed shutdown",
+			stopError:   errors.New("stop error"),
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			process := &ProcessMock{
+				StopMock: func(logger *zap.Logger) error {
+					return tc.stopError
+				},
+			}
+
+			ps := NewProcessSupervisor(logger, process, 5, 0)
+			err := ps.Shutdown()
+
+			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 TestProcessSupervisor_restart(t *testing.T) {
+	for _, tc := range []struct {
+		scenario            string
+		initiallyRestarting bool
+		startError          error
+		stopError           error
+		expectError         bool
+		expectedError       error
+	}{
+		{
+			scenario:            "already restarting",
+			initiallyRestarting: true,
+			expectError:         true,
+			expectedError:       ErrProcessAlreadyRestarting,
+		},
+		{
+			scenario:    "successful restart",
+			startError:  nil,
+			stopError:   nil,
+			expectError: false,
+		},
+		{
+			scenario:    "failed to stop during restart",
+			startError:  nil,
+			stopError:   errors.New("stop error"),
+			expectError: false,
+		},
+		{
+			scenario:    "failed to start during restart",
+			startError:  errors.New("start error"),
+			stopError:   nil,
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			process := &ProcessMock{
+				StartMock: func(logger *zap.Logger) error {
+					return tc.startError
+				},
+				StopMock: func(logger *zap.Logger) error {
+					return tc.stopError
+				},
+			}
+
+			ps := NewProcessSupervisor(logger, process, 5, 0).(*processSupervisor)
+			if tc.initiallyRestarting {
+				ps.isRestarting.Store(true)
+			}
+
+			err := ps.restart()
+
+			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)
+			}
+		})
+	}
+}
+
+func TestProcessSupervisor_Healthy(t *testing.T) {
+	for _, tc := range []struct {
+		scenario            string
+		initiallyStarted    bool
+		initiallyRestarting bool
+		processHealthy      bool
+		expectHealthy       bool
+	}{
+		{
+			scenario:         "non-started process is always healthy",
+			initiallyStarted: false,
+			expectHealthy:    true,
+		},
+		{
+			scenario:            "restarting process is always healthy",
+			initiallyStarted:    true,
+			initiallyRestarting: true,
+			expectHealthy:       true,
+		},
+		{
+			scenario:         "process reports as healthy",
+			initiallyStarted: true,
+			processHealthy:   true,
+			expectHealthy:    true,
+		},
+		{
+			scenario:         "process reports as unhealthy",
+			initiallyStarted: true,
+			processHealthy:   false,
+			expectHealthy:    false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			process := &ProcessMock{
+				HealthyMock: func(logger *zap.Logger) bool {
+					return tc.processHealthy
+				},
+			}
+
+			ps := NewProcessSupervisor(logger, process, 5, 0).(*processSupervisor)
+			if tc.initiallyStarted {
+				ps.firstStart.Store(true)
+			}
+			if tc.initiallyRestarting {
+				ps.isRestarting.Store(true)
+			}
+
+			healthy := ps.Healthy()
+
+			if healthy != tc.expectHealthy {
+				t.Fatalf("expected healthy to be %v but got %v", tc.expectHealthy, healthy)
+			}
+		})
+	}
+}
+
+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,
+			expectError:          false,
+			expectedStartCalls:   1,
+			expectedHealthyCalls: 1,
+			expectedStopCalls:    0,
+		},
+		{
+			scenario:             "cannot launch non-started process",
+			initiallyStarted:     false,
+			isRestarting:         false,
+			startError:           errors.New("launch error"),
+			processHealthy:       true,
+			maxReqLimit:          2,
+			tasksToRun:           1,
+			expectError:          true,
+			expectedStartCalls:   1,
+			expectedHealthyCalls: 0,
+			expectedStopCalls:    0,
+		},
+		{
+			scenario:             "run task with unhealthy process causing restart",
+			initiallyStarted:     true,
+			isRestarting:         false,
+			processHealthy:       false,
+			maxReqLimit:          2,
+			tasksToRun:           1,
+			expectError:          false,
+			expectedStartCalls:   1,
+			expectedHealthyCalls: 1,
+			expectedStopCalls:    1,
+		},
+		{
+			scenario:             "cannot restart unhealthy process",
+			startError:           errors.New("start error"),
+			initiallyStarted:     true,
+			isRestarting:         false,
+			processHealthy:       false,
+			maxReqLimit:          2,
+			tasksToRun:           1,
+			expectError:          true,
+			expectedStartCalls:   1,
+			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,
+			expectError:          false,
+			expectedStartCalls:   1,
+			expectedHealthyCalls: 3,
+			expectedStopCalls:    1,
+		},
+		{
+			scenario:             "cannot restart after reaching max request limit",
+			startError:           errors.New("start error"),
+			initiallyStarted:     true,
+			isRestarting:         false,
+			processHealthy:       true,
+			maxReqLimit:          2,
+			tasksToRun:           2,
+			expectError:          true,
+			expectedStartCalls:   1,
+			expectedHealthyCalls: 2,
+			expectedStopCalls:    1,
+		},
+		{
+			scenario:             "task error",
+			initiallyStarted:     true,
+			isRestarting:         false,
+			processHealthy:       true,
+			maxReqLimit:          0,
+			tasksToRun:           1,
+			taskError:            errors.New("task error"),
+			expectError:          true,
+			expectedStartCalls:   0,
+			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()
+
+			var startCalls, healthyCalls, stopCalls atomic.Int64
+			startCalls.Store(0)
+			healthyCalls.Store(0)
+			stopCalls.Store(0)
+
+			process := &ProcessMock{
+				StartMock: func(logger *zap.Logger) error {
+					startCalls.Add(1)
+					return tc.startError
+				},
+				StopMock: func(logger *zap.Logger) error {
+					stopCalls.Add(1)
+					return nil
+				},
+				HealthyMock: func(logger *zap.Logger) bool {
+					healthyCalls.Add(1)
+					return tc.processHealthy
+				},
+			}
+
+			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
+			}
+
+			ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+			defer cancel()
+
+			var wg sync.WaitGroup
+			errorChan := make(chan error, tc.tasksToRun)
+
+			for i := 0; i < tc.tasksToRun; i++ {
+				wg.Add(1)
+				go func() {
+					defer wg.Done()
+					err := ps.Run(ctx, logger, task)
+					if err != nil {
+						errorChan <- err
+					}
+				}()
+			}
+
+			wg.Wait()
+			close(errorChan)
+
+			for err := range errorChan {
+				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.skipCallsCheck {
+				return
+			}
+
+			if startCalls.Load() != tc.expectedStartCalls {
+				t.Errorf("expected %d process.Start calls, got %d", tc.expectedStartCalls, startCalls.Load())
+			}
+
+			if healthyCalls.Load() != tc.expectedHealthyCalls {
+				t.Errorf("expected %d process.Healthy calls, got %d", tc.expectedHealthyCalls, healthyCalls.Load())
+			}
+
+			if stopCalls.Load() != tc.expectedStopCalls {
+				t.Errorf("expected %d process.Stop calls, got %d", tc.expectedStopCalls, stopCalls.Load())
+			}
+		})
+	}
+}
+
+func TestProcessSupervisor_runWithDeadline(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		ctxDone     bool
+		expectError bool
+	}{
+		{
+			scenario:    "task finished",
+			ctxDone:     false,
+			expectError: false,
+		},
+		{
+			scenario:    "context expired",
+			ctxDone:     true,
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			ps := NewProcessSupervisor(zap.NewNop(), new(ProcessMock), 0, 0).(*processSupervisor)
+
+			ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+			if tc.ctxDone {
+				cancel()
+			} else {
+				defer cancel()
+			}
+
+			err := ps.runWithDeadline(ctx, func() error {
+				return nil
+			})
+
+			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)
+			}
+		})
+	}
+}
+
+func TestProcessSupervisor_ReqQueueSize(t *testing.T) {
+	logger := zap.NewNop()
+	process := &ProcessMock{
+		StartMock: func(logger *zap.Logger) error {
+			return nil
+		},
+		HealthyMock: func(logger *zap.Logger) bool {
+			return true
+		},
+	}
+	ps := NewProcessSupervisor(logger, process, 0, 0).(*processSupervisor)
+
+	// Simulating a lock.
+	ps.mutexChan <- struct{}{}
+
+	if ps.ReqQueueSize() != 0 {
+		t.Fatalf("expected queue size to be 0 but got %d", ps.ReqQueueSize())
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	var wg sync.WaitGroup
+	errorChan := make(chan error, 10)
+
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			err := ps.Run(ctx, logger, func() error {
+				return nil
+			})
+			if err != nil {
+				errorChan <- err
+			}
+		}()
+	}
+
+	// We have to wait a little bit so that the request queue size may change.
+	time.Sleep(10 * time.Millisecond)
+
+	if ps.ReqQueueSize() != 10 {
+		t.Fatalf("expected queue size to be 10 but got %d", ps.ReqQueueSize())
+	}
+
+	wg.Wait()
+	close(errorChan)
+
+	for err := range errorChan {
+		if err == nil {
+			t.Error("expected a lock error but got none")
+		}
+	}
+
+	if ps.ReqQueueSize() != 0 {
+		t.Errorf("expected queue size to be 0 but got %d", ps.ReqQueueSize())
+	}
+}
+
+func TestProcessSupervisor_RestartsCount(t *testing.T) {
+	for _, tc := range []struct {
+		scenario              string
+		initialRestartsCount  int64
+		restartAttempts       int
+		startError            error
+		stopError             error
+		expectedRestartsCount int64
+	}{
+		{
+			scenario:              "no restarts, counter remains 0",
+			initialRestartsCount:  0,
+			restartAttempts:       0,
+			expectedRestartsCount: 0,
+		},
+		{
+			scenario:              "successful restart increases counter",
+			initialRestartsCount:  0,
+			restartAttempts:       1,
+			startError:            nil,
+			stopError:             nil,
+			expectedRestartsCount: 1,
+		},
+		{
+			scenario:              "failed to stop during restart, no impact",
+			initialRestartsCount:  0,
+			restartAttempts:       1,
+			startError:            nil,
+			stopError:             errors.New("stop error"),
+			expectedRestartsCount: 1,
+		},
+		{
+			scenario:              "multiple successful restarts",
+			initialRestartsCount:  0,
+			restartAttempts:       3,
+			startError:            nil,
+			stopError:             nil,
+			expectedRestartsCount: 3,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			process := &ProcessMock{
+				StartMock: func(logger *zap.Logger) error {
+					return tc.startError
+				},
+				StopMock: func(logger *zap.Logger) error {
+					return tc.stopError
+				},
+			}
+
+			ps := NewProcessSupervisor(logger, process, 0, 0).(*processSupervisor)
+			ps.restartsCounter.Store(tc.initialRestartsCount)
+
+			for i := 0; i < tc.restartAttempts; i++ {
+				_ = ps.restart()
+			}
+
+			actualRestartsCount := ps.RestartsCount()
+			if actualRestartsCount != tc.expectedRestartsCount {
+				t.Fatalf("expected restarts count to be %d, but got  %d", tc.expectedRestartsCount, actualRestartsCount)
+			}
+		})
+	}
+}

pkg/modules/api/api.go

@@ -12,25 +12,25 @@ import (
 	"time"
 
 	"github.com/alexliesenfeld/health"
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/gc"
 	"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/v8/pkg/gotenberg"
 )
 
 func init() {
-	gotenberg.MustRegisterModule(API{})
+	gotenberg.MustRegisterModule(new(Api))
 }
 
-// API is a module which provides an HTTP server. Other modules may add routes,
+// Api is a module which provides an HTTP server. Other modules may add routes,
 // middlewares or health checks.
-type API struct {
+type Api struct {
 	port                      int
-	readTimeout               time.Duration
-	writeTimeout              time.Duration
+	startTimeout              time.Duration
 	timeout                   time.Duration
 	rootPath                  string
 	traceHeader               string
@@ -39,17 +39,18 @@ type API struct {
 	routes              []Route
 	externalMiddlewares []Middleware
 	healthChecks        []health.CheckerOption
-	gcGraceDuration     time.Duration
+	readyFn             []func() error
+	fs                  *gotenberg.FileSystem
 	logger              *zap.Logger
 	srv                 *echo.Echo
 }
 
-// Router is a module interface which adds routes to the API.
+// Router is a module interface which adds routes to the [Api].
 type Router interface {
 	Routes() ([]Route, error)
 }
 
-// Route represents a route from a Router.
+// Route represents a route from a [Router].
 type Route struct {
 	// Method is the HTTP method of the route (i.e., GET, POST, etc.).
 	// Required.
@@ -72,13 +73,13 @@ type Route struct {
 	Handler echo.HandlerFunc
 }
 
-// MiddlewareProvider is a module interface which adds middlewares to the API.
+// MiddlewareProvider is a module interface which adds middlewares to the [Api].
 type MiddlewareProvider interface {
 	Middlewares() ([]Middleware, error)
 }
 
 // MiddlewareStack is a type which helps to determine in which stack the
-// middlewares provided by the MiddlewareProvider modules should be located.
+// middlewares provided by the [MiddlewareProvider] modules should be located.
 type MiddlewareStack uint32
 
 const (
@@ -88,7 +89,7 @@ const (
 )
 
 // MiddlewarePriority is a type which helps to determine the execution order of
-// middlewares provided by the MiddlewareProvider modules in a stack.
+// middlewares provided by the [MiddlewareProvider] modules in a stack.
 type MiddlewarePriority uint32
 
 const (
@@ -99,7 +100,7 @@ const (
 	VeryHighPriority
 )
 
-// Middleware is a middleware which can be added to the API's middlewares
+// Middleware is a middleware which can be added to the [Api]'s middlewares
 // chain.
 //
 //	middleware := Middleware{
@@ -126,13 +127,13 @@ const (
 //	}
 type Middleware struct {
 	// Stack tells in which stack the middleware should be located.
-	// Default to DefaultStack.
+	// Default to [DefaultStack].
 	// Optional.
 	Stack MiddlewareStack
 
 	// Priority tells if the middleware should be positioned high or not in
 	// its stack.
-	// Default to VeryLowPriority.
+	// Default to [VeryLowPriority].
 	// Optional.
 	Priority MiddlewarePriority
 
@@ -147,52 +148,35 @@ type Middleware struct {
 // See https://github.com/alexliesenfeld/health for more details.
 type HealthChecker interface {
 	Checks() ([]health.CheckerOption, error)
+	Ready() error
 }
 
-// GarbageCollectorGraceDurationIncrementer is a module interface for
-// increasing the grace duration provided by the API for the garbage collector.
-type GarbageCollectorGraceDurationIncrementer interface {
-	AddGraceDuration() time.Duration
-}
-
-// Descriptor returns an API's module descriptor.
-func (API) Descriptor() gotenberg.ModuleDescriptor {
+// Descriptor returns an [Api]'s module descriptor.
+func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 	return gotenberg.ModuleDescriptor{
 		ID: "api",
 		FlagSet: func() *flag.FlagSet {
 			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.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-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-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) },
+		New: func() gotenberg.Module { return new(Api) },
 	}
 }
 
 // Provision sets the module properties.
-func (a *API) Provision(ctx *gotenberg.Context) error {
+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.startTimeout = flags.MustDuration("api-start-timeout")
+	a.timeout = flags.MustDuration("api-timeout")
 	a.rootPath = flags.MustString("api-root-path")
 	a.traceHeader = flags.MustString("api-trace-header")
 	a.disableHealthCheckLogging = flags.MustBool("api-disable-health-check-logging")
@@ -281,20 +265,10 @@ func (a *API) Provision(ctx *gotenberg.Context) error {
 		}
 
 		a.healthChecks = append(a.healthChecks, checks...)
+		a.readyFn = append(a.readyFn, healthChecker.Ready)
 	}
 
-	// Grace duration.
-	a.gcGraceDuration = a.timeout
-
-	mods, err = ctx.Modules(new(GarbageCollectorGraceDurationIncrementer))
-	if err != nil {
-		return fmt.Errorf("get garbage collector grace duration increments: %w", err)
-	}
-
-	for _, incrementer := range mods {
-		a.gcGraceDuration += incrementer.(GarbageCollectorGraceDurationIncrementer).AddGraceDuration()
-	}
-
+	// Logger.
 	loggerProvider, err := ctx.Module(new(gotenberg.LoggerProvider))
 	if err != nil {
 		return fmt.Errorf("get logger provider: %w", err)
@@ -307,11 +281,14 @@ func (a *API) Provision(ctx *gotenberg.Context) error {
 
 	a.logger = logger
 
+	// File system.
+	a.fs = gotenberg.NewFileSystem()
+
 	return nil
 }
 
 // Validate validates the module properties.
-func (a API) Validate() error {
+func (a *Api) Validate() error {
 	var err error
 
 	if a.port < 1 || a.port > 65535 {
@@ -383,14 +360,14 @@ func (a API) Validate() error {
 }
 
 // Start starts the HTTP server.
-func (a *API) Start() error {
+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.
@@ -425,7 +402,7 @@ func (a *API) Start() error {
 			a.srv.Pre(externalMiddleware.Handler)
 		case MultipartStack:
 			externalMultipartMiddlewares = append(externalMultipartMiddlewares, externalMiddleware)
-		default:
+		case DefaultStack:
 			a.srv.Use(externalMiddleware.Handler)
 		}
 	}
@@ -437,7 +414,7 @@ func (a *API) Start() error {
 		var middlewares []echo.MiddlewareFunc
 
 		if route.IsMultipart {
-			middlewares = append(middlewares, contextMiddleware(a.timeout))
+			middlewares = append(middlewares, contextMiddleware(a.fs, a.timeout))
 
 			for _, externalMultipartMiddleware := range externalMultipartMiddlewares {
 				middlewares = append(middlewares, externalMultipartMiddleware.Handler)
@@ -460,12 +437,25 @@ func (a *API) Start() error {
 		func() echo.HandlerFunc {
 			checks := append(a.healthChecks, health.WithTimeout(a.timeout))
 			checker := health.NewChecker(checks...)
-
 			return echo.WrapHandler(health.NewHandler(checker))
 		}(),
 		hardTimeoutMiddleware(hardTimeout),
 	)
 
+	// 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{}
@@ -479,26 +469,19 @@ func (a *API) Start() error {
 }
 
 // StartupMessage returns a custom startup message.
-func (a API) StartupMessage() string {
+func (a *Api) StartupMessage() string {
 	return fmt.Sprintf("server listening on port %d", a.port)
 }
 
 // Stop stops the HTTP server.
-func (a API) Stop(ctx context.Context) error {
+func (a *Api) Stop(ctx context.Context) error {
 	return a.srv.Shutdown(ctx)
 }
 
-// GraceDuration updates the expiration time of files and directories parsed by
-// the gc.GarbageCollector.
-func (a API) GraceDuration() time.Duration {
-	return a.gcGraceDuration
-}
-
 // Interface guards.
 var (
-	_ gotenberg.Module                         = (*API)(nil)
-	_ gotenberg.Provisioner                    = (*API)(nil)
-	_ gotenberg.Validator                      = (*API)(nil)
-	_ gotenberg.App                            = (*API)(nil)
-	_ gc.GarbageCollectorGraceDurationModifier = (*API)(nil)
+	_ gotenberg.Module      = (*Api)(nil)
+	_ gotenberg.Provisioner = (*Api)(nil)
+	_ gotenberg.Validator   = (*Api)(nil)
+	_ gotenberg.App         = (*Api)(nil)
 )

pkg/modules/api/context.go

@@ -12,16 +12,14 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
-	"unicode"
 
 	"github.com/google/uuid"
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	"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/text/unicode/norm"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 var (
@@ -36,20 +34,26 @@ 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
+	pathRename gotenberg.PathRename
 	context.Context
 }
 
-// newContext returns a Context by parsing a "multipart/form-data" request.
-func newContext(echoCtx echo.Context, logger *zap.Logger, timeout time.Duration) (*Context, context.CancelFunc, error) {
+type osPathRename struct{}
+
+func (o *osPathRename) Rename(oldpath, newpath string) error {
+	return os.Rename(oldpath, newpath)
+}
+
+// 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) {
 	processCtx, processCancel := context.WithTimeout(context.Background(), timeout)
 
 	ctx := &Context{
@@ -57,6 +61,7 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, timeout time.Duration)
 		cancelled:   false,
 		logger:      logger,
 		echoCtx:     echoCtx,
+		pathRename:  new(osPathRename),
 		Context:     processCtx,
 	}
 
@@ -81,39 +86,38 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, timeout time.Duration)
 				return
 			}
 
-			ctx.logger.Debug(fmt.Sprintf("'%s' removed", ctx.dirPath))
+			ctx.logger.Debug(fmt.Sprintf("'%s' context's working directory removed", ctx.dirPath))
 			ctx.cancelled = true
 		}
 	}()
 
 	form, err := echoCtx.MultipartForm()
 	if err != nil {
-
 		if errors.Is(err, http.ErrNotMultipart) {
 			return nil, cancel, WrapError(
 				fmt.Errorf("get multipart form: %w", err),
-				NewSentinelHTTPError(http.StatusUnsupportedMediaType, "Invalid 'Content-Type' header value: want 'multipart/form-data'"),
+				NewSentinelHttpError(http.StatusUnsupportedMediaType, "Invalid 'Content-Type' header value: want 'multipart/form-data'"),
 			)
 		}
 
 		if errors.Is(err, http.ErrMissingBoundary) {
 			return nil, cancel, WrapError(
 				fmt.Errorf("get multipart form: %w", err),
-				NewSentinelHTTPError(http.StatusUnsupportedMediaType, "Invalid 'Content-Type' header value: no boundary"),
+				NewSentinelHttpError(http.StatusUnsupportedMediaType, "Invalid 'Content-Type' header value: no boundary"),
 			)
 		}
 
 		if strings.Contains(err.Error(), io.EOF.Error()) {
 			return nil, cancel, WrapError(
 				fmt.Errorf("get multipart form: %w", err),
-				NewSentinelHTTPError(http.StatusBadRequest, "Malformed body: it does not match the 'Content-Type' header boundaries"),
+				NewSentinelHttpError(http.StatusBadRequest, "Malformed body: it does not match the 'Content-Type' header boundaries"),
 			)
 		}
 
 		return nil, cancel, fmt.Errorf("get multipart form: %w", err)
 	}
 
-	dirPath, err := gotenberg.MkdirAll()
+	dirPath, err := fs.MkdirAll()
 	if err != nil {
 		return nil, cancel, fmt.Errorf("create working directory: %w", err)
 	}
@@ -123,15 +127,6 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, timeout time.Duration)
 	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))
-		if err != nil {
-			return fmt.Errorf("transform filename: %w", err)
-		}
-
 		in, err := fh.Open()
 		if err != nil {
 			return fmt.Errorf("open multipart file: %w", err)
@@ -144,6 +139,10 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, timeout time.Duration)
 			}
 		}()
 
+		// 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)
@@ -171,26 +170,25 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, timeout time.Duration)
 	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)
 			}
 		}
 	}
 
-	ctx.Log().Debug(fmt.Sprintf("form data values: %+v", ctx.values))
-	ctx.Log().Debug(fmt.Sprintf("form data files: %+v", ctx.files))
+	ctx.Log().Debug(fmt.Sprintf("form fields: %+v", ctx.values))
+	ctx.Log().Debug(fmt.Sprintf("form files: %+v", ctx.files))
 
 	return ctx, cancel, err
 }
 
-// Request returns the http.Request.
-func (ctx Context) Request() *http.Request {
+// Request returns the [http.Request].
+func (ctx *Context) Request() *http.Request {
 	return ctx.echoCtx.Request()
 }
 
-// FormData return a FormData.
-func (ctx Context) FormData() *FormData {
+// FormData return a [FormData].
+func (ctx *Context) FormData() *FormData {
 	return &FormData{
 		values: ctx.values,
 		files:  ctx.files,
@@ -198,10 +196,20 @@ func (ctx Context) FormData() *FormData {
 	}
 }
 
-// GeneratePath generates a path within the context's working directory. It
-// does not create a file.
-func (ctx Context) GeneratePath(extension string) string {
-	return fmt.Sprintf("%s/%s%s", ctx.dirPath, uuid.New(), extension)
+// 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().String(), extension)
+}
+
+// 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 {
+	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
@@ -222,14 +230,14 @@ func (ctx *Context) AddOutputPaths(paths ...string) error {
 	return nil
 }
 
-// Log returns the context zap.Logger.
-func (ctx Context) Log() *zap.Logger {
+// Log returns the context [zap.Logger].
+func (ctx *Context) Log() *zap.Logger {
 	return ctx.logger
 }
 
 // BuildOutputFile builds the output file according to the output paths
 // registered in the context. If many output paths, an archive is created.
-func (ctx Context) BuildOutputFile() (string, error) {
+func (ctx *Context) BuildOutputFile() (string, error) {
 	if ctx.cancelled {
 		return "", ErrContextAlreadyClosed
 	}
@@ -267,7 +275,7 @@ func (ctx Context) BuildOutputFile() (string, error) {
 
 // OutputFilename returns the filename based on the given output path or the
 // "Gotenberg-Output-Filename" header's value.
-func (ctx Context) OutputFilename(outputPath string) string {
+func (ctx *Context) OutputFilename(outputPath string) string {
 	filename := ctx.echoCtx.Request().Header.Get("Gotenberg-Output-Filename")
 
 	if filename == "" {
@@ -276,3 +284,8 @@ func (ctx Context) OutputFilename(outputPath string) string {
 
 	return fmt.Sprintf("%s%s", filename, filepath.Ext(outputPath))
 }
+
+// Interface guard.
+var (
+	_ gotenberg.PathRename = (*osPathRename)(nil)
+)

pkg/modules/api/context_test.go

@@ -3,153 +3,206 @@ package api
 import (
 	"bytes"
 	"errors"
+	"fmt"
+	"io"
 	"mime/multipart"
 	"net/http"
 	"net/http/httptest"
 	"os"
+	"path/filepath"
 	"reflect"
 	"strings"
 	"testing"
 	"time"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
+func TestOsPathRename_Rename(t *testing.T) {
+	dirPath, err := gotenberg.NewFileSystem().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 TestNewContext(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario         string
 		request          *http.Request
-		expectErr        bool
-		expectHTTPErr    bool
-		expectHTTPStatus int
+		expectError      bool
+		expectHttpError  bool
+		expectHttpStatus int
 	}{
 		{
+			scenario:         "http.ErrNotMultipart",
 			request:          httptest.NewRequest(http.MethodPost, "/", nil),
-			expectErr:        true,
-			expectHTTPErr:    true,
-			expectHTTPStatus: http.StatusUnsupportedMediaType,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusUnsupportedMediaType,
 		},
 		{
+			scenario: "http.ErrMissingBoundary",
 			request: func() *http.Request {
 				req := httptest.NewRequest(http.MethodPost, "/", nil)
 				req.Header.Set(echo.HeaderContentType, echo.MIMEMultipartForm)
-
 				return req
 			}(),
-			expectErr:        true,
-			expectHTTPErr:    true,
-			expectHTTPStatus: http.StatusUnsupportedMediaType,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusUnsupportedMediaType,
 		},
 		{
+			scenario: "malformed body",
 			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("foo", "foo")
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
-
 				req := httptest.NewRequest(http.MethodPost, "/", nil)
 				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
-
 				return req
 			}(),
-			expectErr:        true,
-			expectHTTPErr:    true,
-			expectHTTPStatus: http.StatusBadRequest,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusBadRequest,
 		},
 		{
+			scenario: "success",
 			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("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, "/", body)
 				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
-
 				return req
 			}(),
+			expectError:     false,
+			expectHttpError: false,
 		},
 	} {
-		handler := func(c echo.Context) error {
-			_, cancel, err := newContext(c, zap.NewNop(), time.Duration(10)*time.Second)
-			defer cancel()
-			// Context already cancelled.
-			defer cancel()
+		t.Run(tc.scenario, func(t *testing.T) {
+			handler := func(c echo.Context) error {
+				_, cancel, err := newContext(c, zap.NewNop(), gotenberg.NewFileSystem(), time.Duration(10)*time.Second)
+				defer cancel()
+				// Context already cancelled.
+				defer cancel()
 
-			if err != nil {
-				return err
+				if err != nil {
+					return err
+				}
+
+				return nil
 			}
 
-			return nil
-		}
+			recorder := httptest.NewRecorder()
 
-		recorder := httptest.NewRecorder()
+			srv := echo.New()
+			srv.HideBanner = true
+			srv.HidePort = true
 
-		srv := echo.New()
-		srv.HideBanner = true
-		srv.HidePort = true
+			c := srv.NewContext(tc.request, recorder)
+			err := handler(c)
 
-		c := srv.NewContext(tc.request, recorder)
-		err := handler(c)
-
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
-
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
-
-		var httpErr HTTPError
-		isHTTPErr := errors.As(err, &httpErr)
-
-		if tc.expectHTTPErr && !isHTTPErr {
-			t.Errorf("test %d: expected HTTP error but got: %v", i, err)
-		}
-
-		if !tc.expectHTTPErr && isHTTPErr {
-			t.Errorf("test %d: expected no HTTP error but got one: %v", i, httpErr)
-		}
-
-		if err != nil && tc.expectHTTPErr && isHTTPErr {
-			status, _ := httpErr.HTTPError()
-			if status != tc.expectHTTPStatus {
-				t.Errorf("test %d: expected %d HTTP status code but got %d", i, tc.expectHTTPStatus, status)
+			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)
+			}
+
+			var httpErr HttpError
+			isHttpError := errors.As(err, &httpErr)
+
+			if tc.expectHttpError && !isHttpError {
+				t.Errorf("expected an HTTP error but got: %v", err)
+			}
+
+			if !tc.expectHttpError && isHttpError {
+				t.Errorf("expected no HTTP error but got one: %v", httpErr)
+			}
+
+			if err != nil && tc.expectHttpError && isHttpError {
+				status, _ := httpErr.HttpError()
+				if status != tc.expectHttpStatus {
+					t.Errorf("expected %d as HTTP status code but got %d", tc.expectHttpStatus, status)
+				}
+			}
+		})
 	}
 }
 
@@ -158,7 +211,7 @@ func TestContext_Request(t *testing.T) {
 	recorder := httptest.NewRecorder()
 	c := echo.New().NewContext(request, recorder)
 
-	ctx := Context{
+	ctx := &Context{
 		echoCtx: c,
 	}
 
@@ -168,7 +221,7 @@ func TestContext_Request(t *testing.T) {
 }
 
 func TestContext_FormData(t *testing.T) {
-	ctx := Context{
+	ctx := &Context{
 		values: map[string][]string{
 			"foo": {"foo"},
 		},
@@ -189,52 +242,95 @@ func TestContext_FormData(t *testing.T) {
 }
 
 func TestContext_GeneratePath(t *testing.T) {
-	ctx := Context{
+	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) {
+			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 i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario    string
 		ctx         *Context
 		path        string
 		expectCount int
-		expectErr   bool
+		expectError bool
 	}{
 		{
-			ctx:       &Context{cancelled: true},
-			expectErr: true,
+			scenario:    "ErrContextAlreadyClosed",
+			ctx:         &Context{cancelled: true},
+			expectCount: 0,
+			expectError: true,
 		},
 		{
-			ctx:       &Context{dirPath: "/foo"},
-			path:      "/bar/foo.txt",
-			expectErr: true,
+			scenario:    "ErrOutOfBoundsOutputPath",
+			ctx:         &Context{dirPath: "/foo"},
+			path:        "/bar/foo.txt",
+			expectCount: 0,
+			expectError: true,
 		},
 		{
+			scenario:    "success",
 			ctx:         &Context{dirPath: "/foo"},
 			path:        "/foo/foo.txt",
 			expectCount: 1,
+			expectError: false,
 		},
 	} {
-		err := tc.ctx.AddOutputPaths(tc.path)
+		t.Run(tc.scenario, func(t *testing.T) {
+			err := tc.ctx.AddOutputPaths(tc.path)
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none", err)
+			}
 
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		if len(tc.ctx.outputPaths) != tc.expectCount {
-			t.Errorf("test %d: expected %d output paths but got %d", i, tc.expectCount, len(tc.ctx.outputPaths))
-		}
+			if len(tc.ctx.outputPaths) != tc.expectCount {
+				t.Errorf("expected %d output paths but got %d", tc.expectCount, len(tc.ctx.outputPaths))
+			}
+		})
 	}
 }
 
@@ -249,76 +345,91 @@ func TestContext_Log(t *testing.T) {
 }
 
 func TestContext_BuildOutputFile(t *testing.T) {
-	for i, tc := range []struct {
-		ctx       *Context
-		expectErr bool
+	for _, tc := range []struct {
+		scenario    string
+		ctx         *Context
+		expectError bool
 	}{
 		{
-			ctx:       &Context{cancelled: true},
-			expectErr: true,
+			scenario:    "ErrContextAlreadyClosed",
+			ctx:         &Context{cancelled: true},
+			expectError: true,
 		},
 		{
-			ctx:       &Context{},
-			expectErr: true,
+			scenario:    "no output path",
+			ctx:         &Context{},
+			expectError: true,
 		},
 		{
-			ctx: &Context{outputPaths: []string{"foo.txt"}},
+			scenario:    "success: one output path",
+			ctx:         &Context{outputPaths: []string{"foo.txt"}},
+			expectError: false,
 		},
 		{
-			ctx:       &Context{outputPaths: []string{"foo.txt", "foo.pdf"}},
-			expectErr: true,
+			scenario:    "cannot archive: invalid output paths",
+			ctx:         &Context{outputPaths: []string{"foo.txt", "foo.pdf"}},
+			expectError: true,
 		},
 		{
+			scenario: "success: many output paths",
 			ctx: &Context{
 				outputPaths: []string{
 					"/tests/test/testdata/api/sample1.txt",
 					"/tests/test/testdata/api/sample1.txt",
 				},
 			},
+			expectError: false,
 		},
 	} {
-		dirPath, err := gotenberg.MkdirAll()
-		if err != nil {
-			t.Fatalf("%d: expected no erro but got: %v", i, err)
-		}
+		t.Run(tc.scenario, func(t *testing.T) {
+			fs := gotenberg.NewFileSystem()
+			dirPath, err := fs.MkdirAll()
+			if err != nil {
+				t.Fatalf("expected no erro but got: %v", err)
+			}
 
-		tc.ctx.dirPath = dirPath
-		tc.ctx.logger = zap.NewNop()
+			defer func() {
+				err := os.RemoveAll(fs.WorkingDirPath())
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up but got: %v", err)
+				}
+			}()
 
-		_, err = tc.ctx.BuildOutputFile()
+			tc.ctx.dirPath = dirPath
+			tc.ctx.logger = zap.NewNop()
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
+			_, err = tc.ctx.BuildOutputFile()
 
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none", err)
+			}
 
-		err = os.RemoveAll(dirPath)
-		if err != nil {
-			t.Fatalf("%d: expected no erro but got: %v", i, err)
-		}
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+		})
 	}
 }
 
 func TestContext_OutputFilename(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		scenario             string
 		ctx                  *Context
 		outputPath           string
 		expectOutputFilename string
 	}{
 		{
+			scenario: "with Gotenberg-Output-Filename header",
 			ctx: func() *Context {
 				c := echo.New().NewContext(httptest.NewRequest(http.MethodGet, "/foo", nil), nil)
 				c.Request().Header.Set("Gotenberg-Output-Filename", "foo")
-
 				return &Context{echoCtx: c}
 			}(),
 			outputPath:           "/foo/bar.txt",
 			expectOutputFilename: "foo.txt",
 		},
 		{
+			scenario: "without custom filename",
 			ctx: func() *Context {
 				c := echo.New().NewContext(httptest.NewRequest(http.MethodGet, "/foo", nil), nil)
 				return &Context{echoCtx: c}
@@ -327,10 +438,12 @@ func TestContext_OutputFilename(t *testing.T) {
 			expectOutputFilename: "foo.txt",
 		},
 	} {
-		actual := tc.ctx.OutputFilename(tc.outputPath)
+		t.Run(tc.scenario, func(t *testing.T) {
+			actual := tc.ctx.OutputFilename(tc.outputPath)
 
-		if actual != tc.expectOutputFilename {
-			t.Errorf("test %d: expected '%s' but got '%s'", i, tc.expectOutputFilename, actual)
-		}
+			if actual != tc.expectOutputFilename {
+				t.Errorf("expected '%s' but got '%s'", tc.expectOutputFilename, actual)
+			}
+		})
 	}
 }

pkg/modules/api/errors.go

@@ -2,66 +2,66 @@ package api
 
 // Credits: https://www.joeshaw.org/error-handling-in-go-http-applications.
 
-// HTTPError is an interface allowing to retrieve the HTTP details of an error.
-type HTTPError interface {
-	HTTPError() (int, string)
+// HttpError is an interface allowing to retrieve the HTTP details of an error.
+type HttpError interface {
+	HttpError() (int, string)
 }
 
-// SentinelHTTPError is the HTTP sidekick of an error.
-type SentinelHTTPError struct {
+// SentinelHttpError is the HTTP sidekick of an error.
+type SentinelHttpError struct {
 	status  int
 	message string
 }
 
-// NewSentinelHTTPError creates a SentinelHTTPError. The message will be sent
+// NewSentinelHttpError creates a [SentinelHttpError]. The message will be sent
 // as the response's body if returned from a handler, so make sure to not leak
 // sensible information.
-func NewSentinelHTTPError(status int, message string) SentinelHTTPError {
-	return SentinelHTTPError{
+func NewSentinelHttpError(status int, message string) SentinelHttpError {
+	return SentinelHttpError{
 		status:  status,
 		message: message,
 	}
 }
 
 // Error returns the message.
-func (err SentinelHTTPError) Error() string {
+func (err SentinelHttpError) Error() string {
 	return err.message
 }
 
-// HTTPError returns the status and message.
-func (err SentinelHTTPError) HTTPError() (int, string) {
+// HttpError returns the status and message.
+func (err SentinelHttpError) HttpError() (int, string) {
 	return err.status, err.message
 }
 
 // sentinelWrappedError contains both the error which will logged and the
-// sidekick SentinelHTTPError.
+// sidekick [SentinelHttpError].
 type sentinelWrappedError struct {
 	error
-	sentinel SentinelHTTPError
+	sentinel SentinelHttpError
 }
 
 func (w sentinelWrappedError) Is(err error) bool {
 	return w.sentinel == err
 }
 
-func (w sentinelWrappedError) HTTPError() (int, string) {
-	return w.sentinel.HTTPError()
+func (w sentinelWrappedError) HttpError() (int, string) {
+	return w.sentinel.HttpError()
 }
 
-// WrapError wraps the given error with a SentinelHTTPError. The wrapped error
-// will be displayed in a log, while the SentinelHTTPError will be sent in the
-// response.
+// WrapError wraps the given error with a [SentinelHttpError]. The wrapped
+// error will be displayed in a log, while the [SentinelHttpError] will be sent
+// in the response.
 //
 //	return api.WrapError(
 //	  // This first error will be logged.
 //	  fmt.Errorf("my action: %w", err),
 //	  // The HTTP error will be sent as a response.
-//	  api.NewSentinelHTTPError(
+//	  api.NewSentinelHttpError(
 //	    http.StatusForbidden,
 //	    "Hey, you did something wrong!"
 //	  ),
 //	)
-func WrapError(err error, sentinel SentinelHTTPError) error {
+func WrapError(err error, sentinel SentinelHttpError) error {
 	return sentinelWrappedError{
 		error:    err,
 		sentinel: sentinel,
@@ -70,8 +70,8 @@ func WrapError(err error, sentinel SentinelHTTPError) error {
 
 // Interface guards.
 var (
-	_ error     = (*SentinelHTTPError)(nil)
-	_ HTTPError = (*SentinelHTTPError)(nil)
+	_ error     = (*SentinelHttpError)(nil)
+	_ HttpError = (*SentinelHttpError)(nil)
 	_ error     = (*sentinelWrappedError)(nil)
-	_ HTTPError = (*sentinelWrappedError)(nil)
+	_ HttpError = (*sentinelWrappedError)(nil)
 )

pkg/modules/api/errors_test.go

@@ -7,9 +7,9 @@ import (
 	"testing"
 )
 
-func TestNewSentinelHTTPError(t *testing.T) {
-	actual := NewSentinelHTTPError(http.StatusInternalServerError, "foo")
-	expect := SentinelHTTPError{
+func TestNewSentinelHttpError(t *testing.T) {
+	actual := NewSentinelHttpError(http.StatusInternalServerError, "foo")
+	expect := SentinelHttpError{
 		status:  http.StatusInternalServerError,
 		message: "foo",
 	}
@@ -19,8 +19,8 @@ func TestNewSentinelHTTPError(t *testing.T) {
 	}
 }
 
-func TestSentinelHTTPError_Error(t *testing.T) {
-	err := SentinelHTTPError{
+func TestSentinelHttpError_Error(t *testing.T) {
+	err := SentinelHttpError{
 		message: "foo",
 	}
 
@@ -32,11 +32,11 @@ func TestSentinelHTTPError_Error(t *testing.T) {
 	}
 }
 
-func TestSentinelHTTPError_HTTPError(t *testing.T) {
-	actualStatus, actualMessage := SentinelHTTPError{
+func TestSentinelHttpError_HttpError(t *testing.T) {
+	actualStatus, actualMessage := SentinelHttpError{
 		status:  http.StatusInternalServerError,
 		message: "foo",
-	}.HTTPError()
+	}.HttpError()
 
 	expectStatus := http.StatusInternalServerError
 	expectMessage := "foo"
@@ -51,7 +51,7 @@ func TestSentinelHTTPError_HTTPError(t *testing.T) {
 }
 
 func TestSentinelWrappedError_Is(t *testing.T) {
-	errSentinel := SentinelHTTPError{}
+	errSentinel := SentinelHttpError{}
 
 	err := sentinelWrappedError{
 		error:    errors.New("foo"),
@@ -63,19 +63,19 @@ func TestSentinelWrappedError_Is(t *testing.T) {
 	}
 }
 
-func TestSentinelWrappedError_HTTPError(t *testing.T) {
-	expectStatus, expectMessage := SentinelHTTPError{
+func TestSentinelWrappedError_HttpError(t *testing.T) {
+	expectStatus, expectMessage := SentinelHttpError{
 		status:  http.StatusInternalServerError,
 		message: "foo",
-	}.HTTPError()
+	}.HttpError()
 
 	actualStatus, actualMessage := sentinelWrappedError{
 		error: errors.New("foo"),
-		sentinel: SentinelHTTPError{
+		sentinel: SentinelHttpError{
 			status:  http.StatusInternalServerError,
 			message: "foo",
 		},
-	}.HTTPError()
+	}.HttpError()
 
 	if actualStatus != expectStatus {
 		t.Errorf("expected %d but got %d", expectStatus, actualStatus)
@@ -91,13 +91,13 @@ func TestWrapError(t *testing.T) {
 
 	expect := sentinelWrappedError{
 		error: errFoo,
-		sentinel: SentinelHTTPError{
+		sentinel: SentinelHttpError{
 			status:  http.StatusInternalServerError,
 			message: "foo",
 		},
 	}
 
-	actual := WrapError(errFoo, SentinelHTTPError{
+	actual := WrapError(errFoo, SentinelHttpError{
 		status:  http.StatusInternalServerError,
 		message: "foo",
 	})

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
@@ -23,8 +26,8 @@ type FormData struct {
 	errors error
 }
 
-// Validate returns nil or an error related to the FormData values, with a
-// SentinelHTTPError (status code 400, errors' details as message) wrapped
+// Validate returns nil or an error related to the [FormData] values, with a
+// [SentinelHttpError] (status code 400, errors' details as message) wrapped
 // inside.
 //
 //	var foo string
@@ -32,18 +35,18 @@ type FormData struct {
 //	err := ctx.FormData().
 //	   MandatoryString("foo", &foo, "bar").
 //	   Validate()
-func (form FormData) Validate() error {
+func (form *FormData) Validate() error {
 	if form.errors == nil {
 		return nil
 	}
 
 	return WrapError(
 		form.errors,
-		NewSentinelHTTPError(http.StatusBadRequest, fmt.Sprintf("Invalid form data: %s", form.errors)),
+		NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Invalid form data: %s", form.errors)),
 	)
 }
 
-// String binds a form data value to a string variable.
+// String binds a form field to a string variable.
 //
 //	var foo string
 //
@@ -52,17 +55,17 @@ func (form *FormData) String(key string, target *string, defaultValue string) *F
 	return form.mustValue(key, target, defaultValue)
 }
 
-// MandatoryString binds a form data value to a string variable. It populates
+// MandatoryString binds a form field to a string variable. It populates
 // an error if the value is empty or the "key" does not exist.
 //
 //	var foo string
 //
 //	ctx.FormData().MandatoryString("foo", &foo)
 func (form *FormData) MandatoryString(key string, target *string) *FormData {
-	return form.mustMandatoryValue(key, target)
+	return form.mustMandatoryField(key, target)
 }
 
-// Bool binds a form data value to a bool variable. It populates an error if
+// Bool binds a form field to a bool variable. It populates an error if
 // the value is not bool.
 //
 //	var foo bool
@@ -72,17 +75,17 @@ func (form *FormData) Bool(key string, target *bool, defaultValue bool) *FormDat
 	return form.mustValue(key, target, defaultValue)
 }
 
-// MandatoryBool binds a form data value to a bool variable. It populates an
+// MandatoryBool binds a form field to a bool variable. It populates an
 // error if the value is not bool, is empty, or the "key" does not exist.
 //
 //	var foo bool
 //
 //	ctx.FormData().MandatoryBool("foo", &foo)
 func (form *FormData) MandatoryBool(key string, target *bool) *FormData {
-	return form.mustMandatoryValue(key, target)
+	return form.mustMandatoryField(key, target)
 }
 
-// Int binds a form data value to an int variable. It populates an error if the
+// Int binds a form field to an int variable. It populates an error if the
 // value is not int.
 //
 //	var foo int
@@ -92,17 +95,17 @@ func (form *FormData) Int(key string, target *int, defaultValue int) *FormData {
 	return form.mustValue(key, target, defaultValue)
 }
 
-// MandatoryInt binds a form data value to an int variable. It populates an
+// MandatoryInt binds a form field to an int variable. It populates an
 // error if the value is not int, is empty, or the "key" does not exist.
 //
 //	var foo int
 //
 //	ctx.FormData().MandatoryInt("foo", &foo)
 func (form *FormData) MandatoryInt(key string, target *int) *FormData {
-	return form.mustMandatoryValue(key, target)
+	return form.mustMandatoryField(key, target)
 }
 
-// Float64 binds a form data value to a float64 variable. It populates an error
+// Float64 binds a form field to a float64 variable. It populates an error
 // if the value is not float64.
 //
 //	var foo float64
@@ -112,18 +115,18 @@ func (form *FormData) Float64(key string, target *float64, defaultValue float64)
 	return form.mustValue(key, target, defaultValue)
 }
 
-// MandatoryFloat64 binds a form data value to a float64 variable. It populates
+// MandatoryFloat64 binds a form field to a float64 variable. It populates
 // an error if the is not float64, is empty, or the "key" does not exist.
 //
 //	var foo float64
 //
 //	ctx.FormData().MandatoryFloat64("foo", &foo)
 func (form *FormData) MandatoryFloat64(key string, target *float64) *FormData {
-	return form.mustMandatoryValue(key, target)
+	return form.mustMandatoryField(key, target)
 }
 
-// Duration binds a form data value to a time.Duration variable. It populates
-// an error if the form data value is not time.Duration.
+// Duration binds a form field to a time.Duration variable. It populates
+// an error if the form field is not time.Duration.
 //
 //	var foo time.Duration
 //
@@ -132,7 +135,7 @@ func (form *FormData) Duration(key string, target *time.Duration, defaultValue t
 	return form.mustValue(key, target, defaultValue)
 }
 
-// MandatoryDuration binds a form data value to a time.Duration variable. It
+// MandatoryDuration binds a form field to a time.Duration variable. It
 // populates an error if the value is not time.Duration, is empty, or the "key"
 // does not exist.
 //
@@ -140,10 +143,95 @@ func (form *FormData) Duration(key string, target *time.Duration, defaultValue t
 //
 //	ctx.FormData().MandatoryDuration("foo", &foo)
 func (form *FormData) MandatoryDuration(key string, target *time.Duration) *FormData {
-	return form.mustMandatoryValue(key, target)
+	return form.mustMandatoryField(key, target)
 }
 
-// Custom helps to define a custom binding function for a form data value.
+// 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
 //
@@ -168,16 +256,15 @@ func (form *FormData) Custom(key string, assign func(value string) error) *FormD
 	err := assign(value)
 	if err != nil {
 		form.append(
-			fmt.Errorf("form value '%s' is invalid (got '%s', resulting to %w)", key, value, err),
+			fmt.Errorf("form field '%s' is invalid (got '%s', resulting to %w)", key, value, err),
 		)
 	}
 
 	return form
 }
 
-// MandatoryCustom helps to define a custom binding function for a form data
-// value. It populates an error if the value is empty or the "key" does not
-// exist.
+// MandatoryCustom helps to define a custom binding function for a form field.
+// It populates an error if the value is empty or the "key" does not exist.
 //
 //	var foo map[string]string
 //
@@ -191,7 +278,7 @@ func (form *FormData) Custom(key string, assign func(value string) error) *FormD
 //	})
 func (form *FormData) MandatoryCustom(key string, assign func(value string) error) *FormData {
 	var value string
-	form.mustMandatoryValue(key, &value)
+	form.mustMandatoryField(key, &value)
 
 	if value == "" {
 		return form
@@ -200,7 +287,7 @@ func (form *FormData) MandatoryCustom(key string, assign func(value string) erro
 	err := assign(value)
 	if err != nil {
 		form.append(
-			fmt.Errorf("form value '%s' is invalid (got '%s', resulting to %w)", key, value, err),
+			fmt.Errorf("form field '%s' is invalid (got '%s', resulting to %w)", key, value, err),
 		)
 	}
 
@@ -305,7 +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
 }
@@ -315,7 +402,7 @@ func (form *FormData) append(err error) {
 	form.errors = multierr.Append(form.errors, err)
 }
 
-// mustValue binds the target interface with a form data value. If the value is
+// mustValue binds the target interface with a form field. If the value is
 // empty or the "key" does not exist, it binds the default value. Currently,
 // only the string, bool, int, float64 and time.Duration types are bindable.
 func (form *FormData) mustValue(key string, target interface{}, defaultValue interface{}) *FormData {
@@ -343,16 +430,16 @@ func (form *FormData) mustValue(key string, target interface{}, defaultValue int
 	return form.mustAssign(key, val[0], target)
 }
 
-// mustMandatoryValue binds the target interface with a form data value. It
+// mustMandatoryField binds the target interface with a form field. It
 // populates an error if the value is empty or the "key" does not exist.
 // Currently, only the string, bool, int, float64 and time.Duration types are
 // bindable.
-func (form *FormData) mustMandatoryValue(key string, target interface{}) *FormData {
+func (form *FormData) mustMandatoryField(key string, target interface{}) *FormData {
 	val, ok := form.values[key]
 
 	if !ok || val[0] == "" {
 		form.append(
-			fmt.Errorf("form value '%s' is required", key),
+			fmt.Errorf("form field '%s' is required", key),
 		)
 
 		return form
@@ -386,7 +473,7 @@ func (form *FormData) mustAssign(key, value string, target interface{}) *FormDat
 
 	if err != nil {
 		form.append(
-			fmt.Errorf("form value '%s' is invalid (got '%s', resulting to %w)", key, value, err),
+			fmt.Errorf("form field '%s' is invalid (got '%s', resulting to %w)", key, value, err),
 		)
 	}
 

pkg/modules/api/middlewares.go

@@ -11,16 +11,25 @@ import (
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
+
+	"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.
 func ParseError(err error) (int, string) {
-	echoErr, ok := err.(*echo.HTTPError)
+	var echoErr *echo.HTTPError
+	ok := errors.As(err, &echoErr)
 	if ok {
 		return echoErr.Code, http.StatusText(echoErr.Code)
 	}
@@ -29,9 +38,25 @@ func ParseError(err error) (int, string) {
 		return http.StatusServiceUnavailable, http.StatusText(http.StatusServiceUnavailable)
 	}
 
-	var httpErr HTTPError
+	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.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()
+		return httpErr.HttpError()
 	}
 
 	// Default 500 status code.
@@ -54,8 +79,8 @@ func httpErrorHandler() echo.HTTPErrorHandler {
 	}
 }
 
-// latencyMiddleware sets the start time in the echo.Context under "startTime".
-// Its value will be used later to calculate a request latency.
+// latencyMiddleware sets the start time in the [echo.Context] under
+// "startTime". Its value will be used later to calculate a request latency.
 //
 //	startTime := c.Get("startTime").(time.Time)
 func latencyMiddleware() echo.MiddlewareFunc {
@@ -71,9 +96,9 @@ func latencyMiddleware() echo.MiddlewareFunc {
 	}
 }
 
-// rootPathMiddleware sets the root path in the echo.Context under "rootPath".
-// Its value may be used to skip a middleware execution based on a request
-// URI.
+// rootPathMiddleware sets the root path in the [echo.Context] under
+// "rootPath". Its value may be used to skip a middleware execution based on a
+// request URI.
 //
 //	rootPath := c.Get("rootPath").(string)
 //	healthURI := fmt.Sprintf("%s/health", rootPath)
@@ -94,7 +119,7 @@ func rootPathMiddleware(rootPath string) echo.MiddlewareFunc {
 	}
 }
 
-// traceMiddleware sets the request identifier in the echo.Context under
+// traceMiddleware sets the request identifier in the [echo.Context] under
 // "trace". Its value is either retrieved from the trace header or generated if
 // the header is not present / its value is empty.
 //
@@ -120,8 +145,8 @@ func traceMiddleware(header string) echo.MiddlewareFunc {
 	}
 }
 
-// loggerMiddleware sets the logger in the echo.Context under "logger" and logs
-// a synchronous request result.
+// loggerMiddleware sets the logger in the [echo.Context] under "logger" and
+// logs a synchronous request result.
 //
 //	logger := c.Get("logger").(*zap.Logger)
 func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.MiddlewareFunc {
@@ -193,20 +218,20 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 }
 
 // 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 result of a
-// "multipart/form-data" request.
+// [Context] and related context.CancelFunc in the [echo.Context] under
+// "context" and "cancel". If the process is synchronous, it also handles the
+// result of a "multipart/form-data" request.
 //
 //	ctx := c.Get("context").(*api.Context)
 //	cancel := c.Get("cancel").(context.CancelFunc)
-func contextMiddleware(timeout time.Duration) echo.MiddlewareFunc {
+func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			logger := c.Get("logger").(*zap.Logger)
 
 			// 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, timeout)
+			ctx, cancel, err := newContext(c, logger, fs, timeout)
 			if err != nil {
 				cancel()
 
@@ -227,6 +252,13 @@ func contextMiddleware(timeout time.Duration) echo.MiddlewareFunc {
 
 			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

@@ -13,6 +13,8 @@ import (
 
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func TestParseError(t *testing.T) {
@@ -27,14 +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.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(
 				errors.New("foo"),
-				NewSentinelHTTPError(http.StatusBadRequest, "foo"),
+				NewSentinelHttpError(http.StatusBadRequest, "foo"),
 			),
 			expectStatus:  http.StatusBadRequest,
 			expectMessage: "foo",
@@ -71,7 +88,7 @@ func TestHttpErrorHandler(t *testing.T) {
 		{
 			err: WrapError(
 				errors.New("foo"),
-				NewSentinelHTTPError(http.StatusBadRequest, "foo"),
+				NewSentinelHttpError(http.StatusBadRequest, "foo"),
 			),
 			expectStatus:  http.StatusBadRequest,
 			expectMessage: "foo",
@@ -122,7 +139,6 @@ func TestLatencyMiddleware(t *testing.T) {
 			return nil
 		},
 	)(c)
-
 	if err != nil {
 		t.Fatalf("expected no error but got: %v", err)
 	}
@@ -150,7 +166,6 @@ func TestRootPathMiddleware(t *testing.T) {
 			return nil
 		},
 	)(c)
-
 	if err != nil {
 		t.Fatalf("expected no error but got: %v", err)
 	}
@@ -191,7 +206,6 @@ func TestTraceMiddleware(t *testing.T) {
 				return nil
 			},
 		)(c)
-
 		if err != nil {
 			t.Fatalf("test %d: expected no error but got: %v", i, err)
 		}
@@ -271,7 +285,6 @@ func TestLoggerMiddleware(t *testing.T) {
 		}
 
 		err := loggerMiddleware(zap.NewNop(), disableLoggingForPaths)(tc.next)(c)
-
 		if err != nil {
 			t.Errorf("test %d: expected no error but got: %v", i, err)
 		}
@@ -322,6 +335,15 @@ 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 {
@@ -389,7 +411,7 @@ func TestContextMiddleware(t *testing.T) {
 		c.Set("trace", "foo")
 		c.Set("startTime", time.Now())
 
-		err := contextMiddleware(time.Duration(10) * time.Second)(tc.next)(c)
+		err := contextMiddleware(gotenberg.NewFileSystem(), time.Duration(10)*time.Second)(tc.next)(c)
 
 		if tc.expectErr && err == nil {
 			t.Errorf("test %d: expected error but got: %v", i, err)

pkg/modules/api/mocks.go

@@ -1,8 +1,11 @@
 package api
 
 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.
@@ -20,6 +23,15 @@ func (ctx *ContextMock) SetDirPath(path string) {
 	ctx.dirPath = path
 }
 
+// DirPath returns the context's working directory path.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetDirPath("/foo")
+//	dirPath := ctx.DirPath()
+func (ctx *ContextMock) DirPath() string {
+	return ctx.dirPath
+}
+
 // SetValues sets the values.
 //
 //	ctx := &api.ContextMock{Context: &api.Context{}}
@@ -54,7 +66,7 @@ func (ctx *ContextMock) SetCancelled(cancelled bool) {
 //
 //	ctx := &api.ContextMock{Context: &api.Context{}}
 //	outputPaths := ctx.OutputPaths()
-func (ctx ContextMock) OutputPaths() []string {
+func (ctx *ContextMock) OutputPaths() []string {
 	return ctx.outputPaths
 }
 
@@ -66,10 +78,57 @@ 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)
 func (ctx *ContextMock) SetEchoContext(c echo.Context) {
 	ctx.Context.echoCtx = c
 }
+
+// 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)
+}
+
+func (router *RouterMock) Routes() ([]Route, error) {
+	return router.RoutesMock()
+}
+
+// MiddlewareProviderMock is a mock for the [MiddlewareProvider] interface.
+type MiddlewareProviderMock struct {
+	MiddlewaresMock func() ([]Middleware, error)
+}
+
+func (provider *MiddlewareProviderMock) Middlewares() ([]Middleware, error) {
+	return provider.MiddlewaresMock()
+}
+
+// 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)
+	_ MiddlewareProvider = (*MiddlewareProviderMock)(nil)
+	_ HealthChecker      = (*HealthCheckerMock)(nil)
+)

pkg/modules/api/mocks_test.go

@@ -4,6 +4,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/alexliesenfeld/health"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
 )
@@ -20,6 +21,18 @@ func TestContextMock_SetDirPath(t *testing.T) {
 	}
 }
 
+func TestContextMock_DirPath(t *testing.T) {
+	mock := &ContextMock{&Context{}}
+	mock.SetDirPath("/foo")
+
+	actual := mock.DirPath()
+	expect := "/foo"
+
+	if actual != expect {
+		t.Errorf("expected '%s' but got '%s'", expect, actual)
+	}
+}
+
 func TestContextMock_SetValues(t *testing.T) {
 	mock := &ContextMock{&Context{}}
 	mock.SetValues(map[string][]string{
@@ -103,3 +116,63 @@ func TestContextMock_SetEchoContext(t *testing.T) {
 		t.Errorf("expected %v but got %v", expect, actual)
 	}
 }
+
+func TestContextMock_SetPathRename(t *testing.T) {
+	mock := ContextMock{&Context{}}
+
+	expect := new(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) {
+			return nil, nil
+		},
+	}
+
+	_, err := mock.Routes()
+	if err != nil {
+		t.Errorf("expected no error from RouterMock.Routes, but got: %v", err)
+	}
+}
+
+func TestMiddlewareProviderMock(t *testing.T) {
+	mock := &MiddlewareProviderMock{
+		MiddlewaresMock: func() ([]Middleware, error) {
+			return nil, nil
+		},
+	}
+
+	_, err := mock.Middlewares()
+	if err != nil {
+		t.Errorf("expected no error from MiddlewareProviderMock.Middlewares, but got: %v", err)
+	}
+}
+
+func TestHealthCheckerMock(t *testing.T) {
+	mock := &HealthCheckerMock{
+		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

@@ -0,0 +1,354 @@
+package chromium
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/chromedp/cdproto/fetch"
+	"github.com/chromedp/cdproto/network"
+	"github.com/chromedp/cdproto/runtime"
+	"github.com/chromedp/chromedp"
+	"github.com/dlclark/regexp2"
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+type browser interface {
+	gotenberg.Process
+	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 {
+	// Executor args.
+	binPath                  string
+	incognito                bool
+	allowInsecureLocalhost   bool
+	ignoreCertificateErrors  bool
+	disableWebSecurity       bool
+	allowFileAccessFromFiles bool
+	hostResolverRules        string
+	proxyServer              string
+	wsUrlReadTimeout         time.Duration
+
+	// Tasks specific.
+	allowList         *regexp2.Regexp
+	denyList          *regexp2.Regexp
+	clearCache        bool
+	clearCookies      bool
+	disableJavaScript bool
+}
+
+type chromiumBrowser struct {
+	initialCtx         context.Context
+	ctx                context.Context
+	cancelFunc         context.CancelFunc
+	userProfileDirPath string
+	ctxMu              sync.RWMutex
+	isStarted          atomic.Bool
+
+	arguments browserArguments
+	fs        *gotenberg.FileSystem
+}
+
+func newChromiumBrowser(arguments browserArguments) browser {
+	b := &chromiumBrowser{
+		initialCtx: context.Background(),
+		arguments:  arguments,
+		fs:         gotenberg.NewFileSystem(),
+	}
+	b.isStarted.Store(false)
+
+	return b
+}
+
+func (b *chromiumBrowser) Start(logger *zap.Logger) error {
+	if b.isStarted.Load() {
+		return errors.New("browser is already started")
+	}
+
+	debug := &debugLogger{logger: logger}
+	b.userProfileDirPath = b.fs.NewDirPath()
+
+	opts := append(chromedp.DefaultExecAllocatorOptions[:],
+		chromedp.CombinedOutput(debug),
+		chromedp.ExecPath(b.arguments.binPath),
+		chromedp.NoSandbox,
+		// See:
+		// https://github.com/gotenberg/gotenberg/issues/327
+		// https://github.com/chromedp/chromedp/issues/904
+		chromedp.DisableGPU,
+		// See:
+		// https://github.com/puppeteer/puppeteer/issues/661
+		// 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 {
+		opts = append(opts, chromedp.Flag("incognito", b.arguments.incognito))
+	}
+
+	if b.arguments.allowInsecureLocalhost {
+		// See https://github.com/gotenberg/gotenberg/issues/488.
+		opts = append(opts, chromedp.Flag("allow-insecure-localhost", true))
+	}
+
+	if b.arguments.ignoreCertificateErrors {
+		opts = append(opts, chromedp.IgnoreCertErrors)
+	}
+
+	if b.arguments.disableWebSecurity {
+		opts = append(opts, chromedp.Flag("disable-web-security", true))
+	}
+
+	if b.arguments.allowFileAccessFromFiles {
+		// See https://github.com/gotenberg/gotenberg/issues/356.
+		opts = append(opts, chromedp.Flag("allow-file-access-from-files", true))
+	}
+
+	if b.arguments.hostResolverRules != "" {
+		// See https://github.com/gotenberg/gotenberg/issues/488.
+		opts = append(opts, chromedp.Flag("host-resolver-rules", b.arguments.hostResolverRules))
+	}
+
+	if b.arguments.proxyServer != "" {
+		// See https://github.com/gotenberg/gotenberg/issues/376.
+		opts = append(opts, chromedp.ProxyServer(b.arguments.proxyServer))
+	}
+
+	// See https://github.com/gotenberg/gotenberg/issues/524.
+	opts = append(opts, chromedp.WSURLReadTimeout(b.arguments.wsUrlReadTimeout))
+
+	allocatorCtx, allocatorCancel := chromedp.NewExecAllocator(b.initialCtx, opts...)
+	ctx, cancel := chromedp.NewContext(allocatorCtx, chromedp.WithDebugf(debug.Printf))
+
+	err := chromedp.Run(ctx)
+	if err != nil {
+		cancel()
+		allocatorCancel()
+		return fmt.Errorf("run exec allocator: %w", err)
+	}
+
+	b.ctxMu.Lock()
+	defer b.ctxMu.Unlock()
+
+	// We have to keep the context around, as we need it to create new tabs
+	// later.
+	b.ctx = ctx
+	b.cancelFunc = func() {
+		cancel()
+		allocatorCancel()
+	}
+	b.isStarted.Store(true)
+
+	return nil
+}
+
+func (b *chromiumBrowser) Stop(logger *zap.Logger) error {
+	if !b.isStarted.Load() {
+		// No big deal? Like calling cancel twice.
+		return nil
+	}
+
+	// Always remove the user profile directory created by Chromium.
+	copyUserProfileDirPath := b.userProfileDirPath
+	defer func(userProfileDirPath string) {
+		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 deleting it.
+			<-time.After(10 * time.Second)
+
+			err := os.RemoveAll(userProfileDirPath)
+			if err != nil {
+				logger.Error(fmt.Sprintf("remove Chromium's user profile directory: %s", err))
+			}
+
+			logger.Debug(fmt.Sprintf("'%s' Chromium's user profile directory removed", userProfileDirPath))
+		}()
+	}(copyUserProfileDirPath)
+
+	b.ctxMu.Lock()
+	defer b.ctxMu.Unlock()
+
+	b.cancelFunc()
+	b.ctx = nil
+	b.userProfileDirPath = ""
+	b.isStarted.Store(false)
+
+	return nil
+}
+
+func (b *chromiumBrowser) Healthy(logger *zap.Logger) bool {
+	// Good to know: the supervisor does not call this method if no first start
+	// or if the process is restarting.
+
+	if !b.isStarted.Load() {
+		// Non-started browser but not restarting?
+		return false
+	}
+
+	b.ctxMu.RLock()
+	defer b.ctxMu.RUnlock()
+
+	timeoutCtx, timeoutCancel := context.WithTimeout(b.ctx, time.Duration(10)*time.Second)
+	defer timeoutCancel()
+
+	taskCtx, taskCancel := chromedp.NewContext(timeoutCtx)
+	defer taskCancel()
+
+	err := chromedp.Run(taskCtx, chromedp.Navigate("about:blank"))
+	if err != nil {
+		logger.Error(fmt.Sprintf("browser health check failed: %s", err))
+		return false
+	}
+
+	return true
+}
+
+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),
+		extraHttpHeadersActionFunc(logger, options.ExtraHttpHeaders),
+		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),
+		extraHttpHeadersActionFunc(logger, options.ExtraHttpHeaders),
+		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.
+		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 tasks")
+	}
+
+	deadline, ok := ctx.Deadline()
+	if !ok {
+		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()
+
+	timeoutCtx, timeoutCancel := context.WithTimeout(b.ctx, time.Until(deadline))
+	defer timeoutCancel()
+
+	taskCtx, taskCancel := chromedp.NewContext(timeoutCtx)
+	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)
+
+	var (
+		invalidHttpStatusCode   error
+		invalidHttpStatusCodeMu sync.RWMutex
+	)
+
+	// See https://github.com/gotenberg/gotenberg/issues/613.
+	if len(options.FailOnHttpStatusCodes) != 0 {
+		listenForEventResponseReceived(taskCtx, logger, url, options.FailOnHttpStatusCodes, &invalidHttpStatusCode, &invalidHttpStatusCodeMu)
+	}
+
+	var (
+		consoleExceptions   error
+		consoleExceptionsMu sync.RWMutex
+	)
+
+	// See https://github.com/gotenberg/gotenberg/issues/262.
+	if options.FailOnConsoleExceptions && !b.arguments.disableJavaScript {
+		listenForEventExceptionThrown(taskCtx, logger, &consoleExceptions, &consoleExceptionsMu)
+	}
+
+	err = chromedp.Run(taskCtx, tasks...)
+	if err != nil {
+		errMessage := err.Error()
+
+		if strings.Contains(errMessage, "Show invalid printer settings error (-32000)") || strings.Contains(errMessage, "content area is empty (-32602)") {
+			return ErrInvalidPrinterSettings
+		}
+
+		if strings.Contains(errMessage, "Page range syntax error") {
+			return ErrPageRangesSyntaxError
+		}
+
+		if strings.Contains(errMessage, "rpcc: message too large") {
+			return ErrRpccMessageTooLarge
+		}
+
+		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/262.
+	consoleExceptionsMu.RLock()
+	defer consoleExceptionsMu.RUnlock()
+
+	if consoleExceptions != nil {
+		return fmt.Errorf("%v: %w", consoleExceptions, ErrConsoleExceptions)
+	}
+
+	return nil
+}
+
+// Interface guards.
+var (
+	_ gotenberg.Process = (*chromiumBrowser)(nil)
+	_ browser           = (*chromiumBrowser)(nil)
+)

pkg/modules/chromium/debug.go

@@ -7,21 +7,21 @@ import (
 	"go.uber.org/zap"
 )
 
-// debugLogger is wrapper around a zap.Logger which is used for debugging
+// debugLogger is wrapper around a [zap.Logger] which is used for debugging
 // Chromium.
 type debugLogger struct {
 	logger *zap.Logger
 }
 
 // Write logs the bytes in a debug message.
-func (debug debugLogger) Write(p []byte) (n int, err error) {
+func (debug *debugLogger) Write(p []byte) (n int, err error) {
 	debug.logger.Debug(string(p))
 
 	return len(p), nil
 }
 
 // Printf logs a debug message.
-func (debug debugLogger) Printf(format string, v ...interface{}) {
+func (debug *debugLogger) Printf(format string, v ...interface{}) {
 	debug.logger.Debug(fmt.Sprintf(format, v...))
 }
 

pkg/modules/chromium/debug_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 func TestDebugLogger_Write(t *testing.T) {
-	actual, err := debugLogger{logger: zap.NewNop()}.Write([]byte("foo"))
+	actual, err := (&debugLogger{logger: zap.NewNop()}).Write([]byte("foo"))
 	expected := len([]byte("foo"))
 
 	if actual != expected {
@@ -20,5 +20,5 @@ func TestDebugLogger_Write(t *testing.T) {
 }
 
 func TestDebugLogger_Printf(t *testing.T) {
-	debugLogger{logger: zap.NewNop()}.Printf("%s", "foo")
+	(&debugLogger{logger: zap.NewNop()}).Printf("%s", "foo")
 }

pkg/modules/chromium/doc.go

@@ -1,4 +1,4 @@
 // Package chromium provides a module which adds routes for converting HTML
-// documents to PDF. Other modules may also retrieve the API provided by this
+// documents to PDF. Other modules may also retrieve the [Api] provided by this
 // module.
 package chromium

pkg/modules/chromium/events.go

@@ -3,7 +3,7 @@ package chromium
 import (
 	"context"
 	"fmt"
-	"regexp"
+	"slices"
 	"sync"
 
 	"github.com/chromedp/cdproto/cdp"
@@ -12,14 +12,17 @@ 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"
 )
 
 // 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) {
+func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowList *regexp2.Regexp, denyList *regexp2.Regexp) {
 	chromedp.ListenTarget(ctx, func(ev interface{}) {
 		switch e := ev.(type) {
 		case *fetch.EventRequestPaused:
@@ -27,13 +30,15 @@ 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(allowList, denyList, e.Request.URL, deadline)
+				if err != nil {
+					logger.Warn(err.Error())
 					allow = false
 				}
 
@@ -42,18 +47,15 @@ func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowL
 
 				if allow {
 					req := fetch.ContinueRequest(e.RequestID)
-					err := req.Do(executorCtx)
-
+					err = req.Do(executorCtx)
 					if err != nil {
 						logger.Error(fmt.Sprintf("continue request: %s", err))
 					}
-
 					return
 				}
 
 				req := fetch.FailRequest(e.RequestID, network.ErrorReasonAccessDenied)
-				err := req.Do(executorCtx)
-
+				err = req.Do(executorCtx)
 				if err != nil {
 					logger.Error(fmt.Sprintf("fail request: %s", err))
 				}
@@ -62,6 +64,37 @@ func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowL
 	})
 }
 
+// listenForEventResponseReceived listens for an invalid HTTP status code is
+// returned by the main page.
+// See https://github.com/gotenberg/gotenberg/issues/613.
+func listenForEventResponseReceived(ctx context.Context, logger *zap.Logger, url string, failOnHttpStatusCodes []int64, invalidHttpStatusCode *error, invalidHttpStatusCodeMu *sync.RWMutex) {
+	for _, code := range []int64{199, 299, 399, 499, 599} {
+		if slices.Contains(failOnHttpStatusCodes, code) {
+			for i := code - 99; i <= code; i++ {
+				failOnHttpStatusCodes = append(failOnHttpStatusCodes, i)
+			}
+		}
+	}
+
+	chromedp.ListenTarget(ctx, func(ev interface{}) {
+		switch ev := ev.(type) {
+		case *network.EventResponseReceived:
+			if ev.Response.URL != url {
+				return
+			}
+
+			logger.Debug(fmt.Sprintf("event EventResponseReceived fired for main page: %+v", ev.Response))
+
+			if slices.Contains(failOnHttpStatusCodes, ev.Response.Status) {
+				invalidHttpStatusCodeMu.Lock()
+				defer invalidHttpStatusCodeMu.Unlock()
+
+				*invalidHttpStatusCode = fmt.Errorf("%d: %s", ev.Response.Status, ev.Response.StatusText)
+			}
+		}
+	})
+}
+
 // listenForEventExceptionThrown listens for exceptions in the console and
 // appends those exceptions to the given error pointer.
 // See https://github.com/gotenberg/gotenberg/issues/262.
@@ -181,7 +214,6 @@ 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

@@ -0,0 +1,44 @@
+package chromium
+
+import (
+	"context"
+
+	"go.uber.org/zap"
+
+	"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 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 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 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 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)
+	_ browser = (*browserMock)(nil)
+)

pkg/modules/chromium/mocks_test.go

@@ -0,0 +1,50 @@
+package chromium
+
+import (
+	"context"
+	"testing"
+
+	"go.uber.org/zap"
+)
+
+func TestApiMock(t *testing.T) {
+	mock := &ApiMock{
+		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(), "", "", 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 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(), "", "", 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

@@ -9,54 +9,64 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"time"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
 	"github.com/labstack/echo/v4"
 	"github.com/microcosm-cc/bluemonday"
 	"github.com/russross/blackfriday/v2"
 	"go.uber.org/multierr"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
 )
 
-// FormDataChromiumPDFOptions creates Options form 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
+		failOnConsoleExceptions bool
+		waitDelay               time.Duration
+		waitWindowStatus        string
+		waitForExpression       string
+		extraHttpHeaders        map[string]string
+		emulatedMediaType       string
+		omitBackground          bool
 	)
 
 	form := ctx.FormData().
+		Bool("skipNetworkIdleEvent", &skipNetworkIdleEvent, defaultOptions.SkipNetworkIdleEvent).
+		Custom("failOnHttpStatusCodes", func(value string) error {
+			if value == "" {
+				failOnHttpStatusCodes = defaultOptions.FailOnHttpStatusCodes
+				return nil
+			}
+
+			err := json.Unmarshal([]byte(value), &failOnHttpStatusCodes)
+			if err != nil {
+				return fmt.Errorf("unmarshal failOnHttpStatusCodes: %w", err)
+			}
+
+			return nil
+		}).
 		Bool("failOnConsoleExceptions", &failOnConsoleExceptions, defaultOptions.FailOnConsoleExceptions).
 		Duration("waitDelay", &waitDelay, defaultOptions.WaitDelay).
 		String("waitWindowStatus", &waitWindowStatus, defaultOptions.WaitWindowStatus).
 		String("waitForExpression", &waitForExpression, defaultOptions.WaitForExpression).
-		String("userAgent", &userAgent, defaultOptions.UserAgent).
 		Custom("extraHttpHeaders", func(value string) error {
 			if value == "" {
-				extraHTTPHeaders = defaultOptions.ExtraHTTPHeaders
-
+				extraHttpHeaders = defaultOptions.ExtraHttpHeaders
 				return nil
 			}
 
-			err := json.Unmarshal([]byte(value), &extraHTTPHeaders)
+			err := json.Unmarshal([]byte(value), &extraHttpHeaders)
 			if err != nil {
-				return fmt.Errorf("unmarshal extra HTTP headers: %w", err)
+				return fmt.Errorf("unmarshal extraHttpHeaders: %w", err)
 			}
 
 			return nil
@@ -64,111 +74,201 @@ func FormDataChromiumPDFOptions(ctx *api.Context) (*api.FormData, Options) {
 		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)
+		Bool("omitBackground", &omitBackground, defaultOptions.OmitBackground)
 
 	options := Options{
+		SkipNetworkIdleEvent:    skipNetworkIdleEvent,
+		FailOnHttpStatusCodes:   failOnHttpStatusCodes,
 		FailOnConsoleExceptions: failOnConsoleExceptions,
 		WaitDelay:               waitDelay,
 		WaitWindowStatus:        waitWindowStatus,
 		WaitForExpression:       waitForExpression,
-		UserAgent:               userAgent,
-		ExtraHTTPHeaders:        extraHTTPHeaders,
-		ExtraLinkTags:           defaultOptions.ExtraLinkTags,
+		ExtraHttpHeaders:        extraHttpHeaders,
 		EmulatedMediaType:       emulatedMediaType,
-		ExtraScriptTags:         defaultOptions.ExtraScriptTags,
-		Landscape:               landscape,
-		PrintBackground:         printBackground,
 		OmitBackground:          omitBackground,
-		Scale:                   scale,
-		PaperWidth:              paperWidth,
-		PaperHeight:             paperHeight,
-		MarginTop:               marginTop,
-		MarginBottom:            marginBottom,
-		MarginLeft:              marginLeft,
-		MarginRight:             marginRight,
-		PageRanges:              pageRanges,
-		HeaderTemplate:          headerTemplate,
-		FooterTemplate:          footerTemplate,
-		PreferCSSPageSize:       preferCSSPageSize,
 	}
 
 	return form, options
 }
 
-// convertURLRoute returns an api.Route which can convert a URL to PDF.
-func convertURLRoute(chromium API, engine gotenberg.PDFEngine) api.Route {
+// 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
+	)
+
+	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)
+
+	pdfOptions := PdfOptions{
+		Options:           options,
+		Landscape:         landscape,
+		PrintBackground:   printBackground,
+		Scale:             scale,
+		SinglePage:        singlePage,
+		PaperWidth:        paperWidth,
+		PaperHeight:       paperHeight,
+		MarginTop:         marginTop,
+		MarginBottom:      marginBottom,
+		MarginLeft:        marginLeft,
+		MarginRight:       marginRight,
+		PageRanges:        pageRanges,
+		HeaderTemplate:    headerTemplate,
+		FooterTemplate:    footerTemplate,
+		PreferCssPageSize: preferCssPageSize,
+	}
+
+	return form, pdfOptions
+}
+
+// FormDataChromiumScreenshotOptions creates [ScreenshotOptions] from the form
+// data. Fallback to default value if the considered key is not present.
+func FormDataChromiumScreenshotOptions(ctx *api.Context) (*api.FormData, ScreenshotOptions) {
+	form, options := FormDataChromiumOptions(ctx)
+	defaultScreenshotOptions := DefaultScreenshotOptions()
+
+	var (
+		format           string
+		quality          int
+		optimizeForSpeed bool
+	)
+
+	form.
+		Custom("format", func(value string) error {
+			if value == "" {
+				format = defaultScreenshotOptions.Format
+				return nil
+			}
+
+			if value != "png" && value != "jpeg" && value != "webp" {
+				return fmt.Errorf("wrong value, expected either 'png', 'jpeg' or 'webp'")
+			}
+
+			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,
+		Format:           format,
+		Quality:          quality,
+		OptimizeForSpeed: optimizeForSpeed,
+	}
+
+	return form, screenshotOptions
+}
+
+// FormDataChromiumPdfFormats creates [gotenberg.PdfFormats] from the form
+// data. Fallback to default value if the considered key is not present.
+func FormDataChromiumPdfFormats(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) map[string]interface{} {
+	var metadata map[string]interface{}
+	form.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
+	})
+	return metadata
+}
+
+// convertUrlRoute returns an [api.Route] which can convert a URL to PDF.
+func convertUrlRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 	return api.Route{
 		Method:      http.MethodPost,
 		Path:        "/forms/chromium/convert/url",
 		IsMultipart: true,
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
-			form, options := FormDataChromiumPDFOptions(ctx)
-
-			var (
-				URL       string
-				PDFformat string
-			)
+			form, options := FormDataChromiumPdfOptions(ctx)
+			pdfFormats := FormDataChromiumPdfFormats(form)
+			metadata := FormDataPdfMetadata(form)
 
+			var url string
 			err := form.
-				MandatoryString("url", &URL).
-				String("pdfFormat", &PDFformat, "").
-				Custom("extraLinkTags", func(value string) error {
-					if value == "" {
-						return nil
-					}
-
-					err := json.Unmarshal([]byte(value), &options.ExtraLinkTags)
-					if err != nil {
-						return fmt.Errorf("unmarshal extra link tags: %w", err)
-					}
-
-					return nil
-				}).
-				Custom("extraScriptTags", func(value string) error {
-					if value == "" {
-						return nil
-					}
-
-					err := json.Unmarshal([]byte(value), &options.ExtraScriptTags)
-					if err != nil {
-						return fmt.Errorf("unmarshal extra script tags: %w", err)
-					}
-
-					return nil
-				}).
+				MandatoryString("url", &url).
 				Validate()
-
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			err = convertURL(ctx, chromium, engine, URL, PDFformat, options)
+			err = convertUrl(ctx, chromium, engine, url, options, pdfFormats, metadata)
 			if err != nil {
 				return fmt.Errorf("convert URL to PDF: %w", err)
 			}
@@ -178,33 +278,58 @@ func convertURLRoute(chromium API, engine gotenberg.PDFEngine) api.Route {
 	}
 }
 
-// convertHTMLRoute returns an api.Route which can convert an HTML file to PDF.
-func convertHTMLRoute(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 {
 	return api.Route{
 		Method:      http.MethodPost,
 		Path:        "/forms/chromium/convert/html",
 		IsMultipart: true,
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
-			form, options := FormDataChromiumPDFOptions(ctx)
-
-			var (
-				inputPath string
-				PDFformat string
-			)
+			form, options := FormDataChromiumPdfOptions(ctx)
+			pdfFormats := FormDataChromiumPdfFormats(form)
+			metadata := FormDataPdfMetadata(form)
 
+			var inputPath string
 			err := form.
 				MandatoryPath("index.html", &inputPath).
-				String("pdfFormat", &PDFformat, "").
 				Validate()
-
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			URL := fmt.Sprintf("file://%s", inputPath)
-
-			err = convertURL(ctx, chromium, engine, URL, PDFformat, options)
+			url := fmt.Sprintf("file://%s", inputPath)
+			err = convertUrl(ctx, chromium, engine, url, options, pdfFormats, metadata)
 			if err != nil {
 				return fmt.Errorf("convert HTML to PDF: %w", err)
 			}
@@ -214,108 +339,68 @@ func convertHTMLRoute(chromium API, engine gotenberg.PDFEngine) api.Route {
 	}
 }
 
-// convertMarkdownRoute returns an api.Route which can convert markdown files
+// 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 {
+func convertMarkdownRoute(chromium Api, engine gotenberg.PdfEngine) api.Route {
 	return api.Route{
 		Method:      http.MethodPost,
 		Path:        "/forms/chromium/convert/markdown",
 		IsMultipart: true,
 		Handler: func(c echo.Context) error {
 			ctx := c.Get("context").(*api.Context)
-			form, options := FormDataChromiumPDFOptions(ctx)
+			form, options := FormDataChromiumPdfOptions(ctx)
+			pdfFormats := FormDataChromiumPdfFormats(form)
+			metadata := FormDataPdfMetadata(form)
 
 			var (
 				inputPath     string
 				markdownPaths []string
-				PDFformat     string
 			)
 
 			err := form.
 				MandatoryPath("index.html", &inputPath).
 				MandatoryPaths([]string{".md"}, &markdownPaths).
-				String("pdfFormat", &PDFformat, "").
 				Validate()
-
 			if err != nil {
 				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(), 0600)
-			if err != nil {
-				return fmt.Errorf("write template result: %w", err)
-			}
-
-			URL := fmt.Sprintf("file://%s", inputPath)
-
-			err = convertURL(ctx, chromium, engine, URL, PDFformat, options)
+			err = convertUrl(ctx, chromium, engine, url, options, pdfFormats, metadata)
 			if err != nil {
 				return fmt.Errorf("convert markdown to PDF: %w", err)
 			}
@@ -325,54 +410,140 @@ 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, PDFformat string, 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, pdfFormats gotenberg.PdfFormats, metadata map[string]interface{}) error {
 	outputPath := ctx.GeneratePath(".pdf")
 
-	err := chromium.PDF(ctx, ctx.Log(), URL, outputPath, options)
+	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),
-				api.NewSentinelHTTPError(
+				api.NewSentinelHttpError(
 					http.StatusBadRequest,
 					"omitBackground requires printBackground set to true",
 				),
 			)
 		}
 
-		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),
-				api.NewSentinelHTTPError(
+				api.NewSentinelHttpError(
 					http.StatusBadRequest,
 					"Chromium does not handle the provided settings; please check for aberrant form values",
 				),
@@ -382,47 +553,26 @@ func convertURL(ctx *api.Context, chromium API, engine gotenberg.PDFEngine, URL,
 		if errors.Is(err, ErrPageRangesSyntaxError) {
 			return api.WrapError(
 				fmt.Errorf("convert to PDF: %w", err),
-				api.NewSentinelHTTPError(
+				api.NewSentinelHttpError(
 					http.StatusBadRequest,
 					fmt.Sprintf("Chromium does not handle the page ranges '%s' (nativePageRanges)", options.PageRanges),
 				),
 			)
 		}
 
-		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 this result PDF
-	// to a specific PDF format.
-
-	if PDFformat != "" {
+	// 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")
 
-		err = engine.Convert(ctx, ctx.Log(), PDFformat, convertInputPath, convertOutputPath)
-
+		err = engine.Convert(ctx, ctx.Log(), pdfFormats, convertInputPath, convertOutputPath)
 		if err != nil {
-			if errors.Is(err, gotenberg.ErrPDFFormatNotAvailable) {
-				return api.WrapError(
-					fmt.Errorf("convert PDF: %w", err),
-					api.NewSentinelHTTPError(
-						http.StatusBadRequest,
-						fmt.Sprintf("At least one PDF engine does not handle the PDF format '%s' (pdfFormat), while other have failed to convert for other reasons", PDFformat),
-					),
-				)
-			}
-
 			return fmt.Errorf("convert PDF: %w", err)
 		}
 
@@ -430,6 +580,14 @@ func convertURL(ctx *api.Context, chromium API, engine gotenberg.PDFEngine, URL,
 		outputPath = convertOutputPath
 	}
 
+	// Writes and potentially overrides metadata entries, if any.
+	if len(metadata) > 0 {
+		err = engine.WriteMetadata(ctx, ctx.Log(), metadata, outputPath)
+		if err != nil {
+			return fmt.Errorf("write metadata: %w", err)
+		}
+	}
+
 	err = ctx.AddOutputPaths(outputPath)
 	if err != nil {
 		return fmt.Errorf("add output path: %w", err)
@@ -437,3 +595,66 @@ func convertURL(ctx *api.Context, chromium API, engine gotenberg.PDFEngine, URL,
 
 	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)
+	if err != nil {
+		return fmt.Errorf("add output path: %w", err)
+	}
+
+	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, ErrConsoleExceptions) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Chromium console exceptions:\n %s", strings.ReplaceAll(err.Error(), ErrConsoleExceptions.Error(), "")),
+			),
+		)
+	}
+
+	return err
+}

pkg/modules/chromium/tasks.go

@@ -0,0 +1,417 @@
+package chromium
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/chromedp/cdproto/cdp"
+	"github.com/chromedp/cdproto/emulation"
+	"github.com/chromedp/cdproto/network"
+	"github.com/chromedp/cdproto/page"
+	"github.com/chromedp/chromedp"
+	"go.uber.org/zap"
+)
+
+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(paperHeight).
+			WithMarginTop(options.MarginTop).
+			WithMarginBottom(options.MarginBottom).
+			WithMarginLeft(options.MarginLeft).
+			WithMarginRight(options.MarginRight).
+			WithPageRanges(pageRanges).
+			WithPreferCSSPageSize(options.PreferCssPageSize).
+			// Does not seem to work.
+			// See https://github.com/gotenberg/gotenberg/issues/831.
+			WithGenerateTaggedPDF(false)
+
+		hasCustomHeaderFooter := options.HeaderTemplate != DefaultPdfOptions().HeaderTemplate ||
+			options.FooterTemplate != DefaultPdfOptions().FooterTemplate
+
+		if !hasCustomHeaderFooter {
+			logger.Debug("no custom header nor footer")
+
+			printToPdf = printToPdf.WithDisplayHeaderFooter(false)
+		} else {
+			logger.Debug("with custom header and/or footer")
+
+			printToPdf = printToPdf.
+				WithDisplayHeaderFooter(true).
+				WithHeaderTemplate(options.HeaderTemplate).
+				WithFooterTemplate(options.FooterTemplate)
+		}
+
+		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)
+		}
+
+		reader := &streamReader{
+			ctx:    ctx,
+			handle: stream,
+			r:      nil,
+			pos:    0,
+			eof:    false,
+		}
+
+		defer func() {
+			err = reader.Close()
+			if err != nil {
+				logger.Error(fmt.Sprintf("close reader: %s", 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))
+			}
+		}()
+
+		buffer := bufio.NewReader(reader)
+
+		_, err = buffer.WriteTo(file)
+		if err != nil {
+			return fmt.Errorf("write result to output path: %w", err)
+		}
+
+		return nil
+	}
+}
+
+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.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 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
+		}
+
+		logger.Debug("disable JavaScript")
+
+		err := emulation.SetScriptExecutionDisabled(true).Do(ctx)
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("disable JavaScript: %w", err)
+	}
+}
+
+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))
+
+		_, _, _, err := page.Navigate(url).Do(ctx)
+		if err != nil {
+			return fmt.Errorf("navigate to '%s': %w", url, err)
+		}
+
+		waitFunc := []func() error{
+			waitForEventDomContentEventFired(ctx, logger),
+			waitForEventLoadEventFired(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 {
+			return nil
+		}
+
+		return fmt.Errorf("wait for events: %w", err)
+	}
+}
+
+func hideDefaultWhiteBackgroundActionFunc(logger *zap.Logger, omitBackground, printBackground bool) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		// See https://github.com/gotenberg/gotenberg/issues/226.
+		if !omitBackground {
+			logger.Debug("default white background not hidden")
+			return nil
+		}
+
+		if !printBackground {
+			// See https://github.com/chromedp/chromedp/issues/1179#issuecomment-1284794416.
+			return fmt.Errorf("validate omit background: %w", ErrOmitBackgroundWithoutPrintBackground)
+		}
+
+		logger.Debug("hide default white background")
+
+		err := emulation.SetDefaultBackgroundColorOverride().WithColor(
+			&cdp.RGBA{
+				R: 0,
+				G: 0,
+				B: 0,
+				A: 0,
+			}).Do(ctx)
+
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("hide default white background: %w", err)
+	}
+}
+
+func forceExactColorsActionFunc() chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		// See:
+		// https://github.com/gotenberg/gotenberg/issues/354
+		// https://github.com/puppeteer/puppeteer/issues/2685
+		// https://github.com/chromedp/chromedp/issues/520
+		script := `
+(() => {
+	const css = 'html { -webkit-print-color-adjust: exact !important; }';
+
+	const style = document.createElement('style');
+	style.type = 'text/css';
+	style.appendChild(document.createTextNode(css));
+	document.head.appendChild(style);
+})();
+`
+
+		evaluate := chromedp.Evaluate(script, nil)
+		err := evaluate.Do(ctx)
+
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("add CSS for exact colors: %w", err)
+	}
+}
+
+func emulateMediaTypeActionFunc(logger *zap.Logger, mediaType string) chromedp.ActionFunc {
+	return func(ctx context.Context) error {
+		if mediaType == "" {
+			logger.Debug("no emulated media type")
+			return nil
+		}
+
+		if mediaType != "screen" && mediaType != "print" {
+			return fmt.Errorf("validate emulated media type '%s': %w", mediaType, ErrInvalidEmulatedMediaType)
+		}
+
+		logger.Debug(fmt.Sprintf("emulate media type '%s'", mediaType))
+
+		emulatedMedia := emulation.SetEmulatedMedia()
+		err := emulatedMedia.WithMedia(mediaType).Do(ctx)
+		if err == nil {
+			return nil
+		}
+
+		return fmt.Errorf("emulate media type '%s': %w", mediaType, err)
+	}
+}
+
+func waitDelayBeforePrintActionFunc(logger *zap.Logger, disableJavaScript bool, delay time.Duration) chromedp.ActionFunc {
+	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
+		}
+
+		// We wait for a given amount of time so that JavaScript
+		// scripts have a chance to finish before printing the page.
+		logger.Debug(fmt.Sprintf("wait '%s' before print", delay))
+
+		select {
+		case <-ctx.Done():
+			return fmt.Errorf("wait delay: %w", ctx.Err())
+		case <-time.After(delay):
+			return nil
+		}
+	}
+}
+
+func waitForExpressionBeforePrintActionFunc(logger *zap.Logger, disableJavaScript bool, expression string) chromedp.ActionFunc {
+	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
+		}
+
+		// We wait until the evaluation of the expression is true or
+		// until the context is done.
+		logger.Debug(fmt.Sprintf("wait until '%s' is true before print", expression))
+		ticker := time.NewTicker(time.Duration(100) * time.Millisecond)
+
+		for {
+			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)
+				}
+
+				if ok {
+					ticker.Stop()
+					return nil
+				}
+
+				continue
+			}
+		}
+	}
+}

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 +1,143 @@
+package exiftool
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+
+	"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)
+}
+
+// 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 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: %w", 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 +1,322 @@
+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_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",
+			createCopy: true,
+			inputPath:  "/tests/test/testdata/pdfengines/sample1.pdf",
+			metadata: map[string]interface{}{
+				"Unsupported": map[string]interface{}{},
+			},
+			expectError:   true,
+			expectedError: gotenberg.ErrPdfEngineMetadataValueNotSupported,
+		},
+		{
+			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()
+				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/gc/doc.go

@@ -1,3 +0,0 @@
-// Package gc provides a module for removing files and directories that have
-// expired.
-package gc

pkg/modules/gc/gc.go

@@ -1,225 +0,0 @@
-package gc
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"os"
-	"path/filepath"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"go.uber.org/zap"
-)
-
-func init() {
-	gotenberg.MustRegisterModule(GarbageCollector{})
-}
-
-// GarbageCollector is a module for removing files and directories that have
-// expired. It allows us to make sure that the application does not leak files
-// or directories when running.
-type GarbageCollector struct {
-	rootPath      string
-	graceDuration time.Duration
-	excludeSubstr []string
-
-	ticker *time.Ticker
-	done   chan bool
-
-	logger *zap.Logger
-}
-
-// GarbageCollectorGraceDurationModifier is a module interface which allows to
-// update the expiration time of files and directories parsed by the garbage
-// collector. For instance, if the grace duration is 30s, the garbage collector
-// will remove paths that have a modification time older than 30s. If there are
-// many GarbageCollectorGraceDurationModifier, only the longest grace duration
-// is selected.
-type GarbageCollectorGraceDurationModifier interface {
-	GraceDuration() time.Duration
-}
-
-// GarbageCollectorExcludeSubstrModifier is a module interface which adds the
-// given substrings to the exclude list of the garbage collector. If a path
-// contains one of those substrings, the garbage collector ignores it.
-type GarbageCollectorExcludeSubstrModifier interface {
-	ExcludeSubstr() []string
-}
-
-// Descriptor returns a GarbageCollector's module descriptor.
-func (gc GarbageCollector) Descriptor() gotenberg.ModuleDescriptor {
-	return gotenberg.ModuleDescriptor{
-		ID:  "gc",
-		New: func() gotenberg.Module { return new(GarbageCollector) },
-	}
-}
-
-// Provision sets the module properties.
-func (gc *GarbageCollector) Provision(ctx *gotenberg.Context) error {
-	gc.rootPath = gotenberg.TmpPath()
-
-	graceDurationModifiers, err := ctx.Modules(new(GarbageCollectorGraceDurationModifier))
-	if err != nil {
-		return fmt.Errorf("get grace duration modifiers: %w", err)
-	}
-
-	for _, graceDurationModifier := range graceDurationModifiers {
-		modifier := graceDurationModifier.(GarbageCollectorGraceDurationModifier)
-
-		if gc.graceDuration < modifier.GraceDuration() {
-			gc.graceDuration = modifier.GraceDuration()
-		}
-	}
-
-	excludeSubstrModifiers, err := ctx.Modules(new(GarbageCollectorExcludeSubstrModifier))
-	if err != nil {
-		return fmt.Errorf("get exclude substr modifiers: %w", err)
-	}
-
-	gc.excludeSubstr = strings.Split(os.Getenv("GC_EXCLUDE_SUBSTR"), ",")
-
-	for _, excludeSubstrModifier := range excludeSubstrModifiers {
-		modifier := excludeSubstrModifier.(GarbageCollectorExcludeSubstrModifier)
-
-		gc.excludeSubstr = append(gc.excludeSubstr, modifier.ExcludeSubstr()...)
-	}
-
-	loggerProvider, err := ctx.Module(new(gotenberg.LoggerProvider))
-	if err != nil {
-		return fmt.Errorf("get logger provider: %w", err)
-	}
-
-	logger, err := loggerProvider.(gotenberg.LoggerProvider).Logger(gc)
-	if err != nil {
-		return fmt.Errorf("get logger: %w", err)
-	}
-
-	gc.logger = logger
-
-	return nil
-}
-
-// Start starts the garbage collector.
-func (gc *GarbageCollector) Start() error {
-	gc.ticker = time.NewTicker(gc.graceDuration + time.Duration(1)*time.Second)
-	gc.done = make(chan bool, 1)
-
-	go func() {
-		for {
-			func() {
-				gcMu.RLock()
-				defer gcMu.RUnlock()
-
-				select {
-				case <-gc.done:
-					return
-				case <-gc.ticker.C:
-					gc.collect(false)
-				}
-			}()
-		}
-	}()
-
-	return nil
-}
-
-// collect parses the root path of the garbage collector and removes files or
-// directories that have expired. It ignores the expiration date if the "force"
-// argument is set to true.
-func (gc GarbageCollector) collect(force bool) {
-	expirationTime := time.Now().Add(-gc.graceDuration)
-
-	// To make sure that the next Walk method stays on
-	// the root level of the considered path, we have to
-	// return a filepath.SkipDir error if the current path
-	// is a directory.
-	skipDirOrNil := func(info os.FileInfo) error {
-		if info.IsDir() {
-			return filepath.SkipDir
-		}
-
-		return nil
-	}
-
-	removePath := func(path string) {
-		err := os.RemoveAll(path)
-		if err != nil {
-			gc.logger.Error(fmt.Sprintf("remove '%s': %s", path, err))
-		}
-
-		gc.logger.Debug(fmt.Sprintf("'%s' removed", path))
-	}
-
-	err := filepath.Walk(gc.rootPath, func(path string, info os.FileInfo, pathErr error) error {
-		if pathErr != nil {
-			// For whatever reasons, the Walk method failed
-			// to process the current path.
-			return pathErr
-		}
-
-		if path == gc.rootPath {
-			return nil
-		}
-
-		for _, substr := range gc.excludeSubstr {
-			if strings.Contains(info.Name(), substr) {
-				return skipDirOrNil(info)
-			}
-		}
-
-		if force {
-			removePath(path)
-
-			return skipDirOrNil(info)
-		}
-
-		if info.ModTime().Before(expirationTime) {
-			removePath(path)
-		}
-
-		return skipDirOrNil(info)
-	})
-
-	if err != nil {
-		gc.logger.Error(err.Error())
-	}
-}
-
-// StartupMessage returns an empty string.
-func (gc GarbageCollector) StartupMessage() string {
-	return ""
-}
-
-// Stop stops the garbage collector.
-func (gc *GarbageCollector) Stop(ctx context.Context) error {
-	_, ok := ctx.Deadline()
-	if !ok {
-		return errors.New("no context dead line")
-	}
-
-	// Block until the context is done so that other module may gracefully stop
-	// before we do a shutdown cleanup.
-	gc.logger.Debug("wait for the end of grace duration")
-
-	<-ctx.Done()
-
-	gc.ticker.Stop()
-	gc.done <- true
-
-	gc.logger.Debug("shutdown cleanup...")
-	gc.collect(true)
-
-	return nil
-}
-
-var gcMu sync.RWMutex
-
-// Interface guards.
-var (
-	_ gotenberg.Module      = (*GarbageCollector)(nil)
-	_ gotenberg.Provisioner = (*GarbageCollector)(nil)
-	_ gotenberg.App         = (*GarbageCollector)(nil)
-)

pkg/modules/gc/gc_test.go

@@ -1,468 +0,0 @@
-package gc
-
-import (
-	"context"
-	"errors"
-	"os"
-	"reflect"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"go.uber.org/zap"
-)
-
-type ProtoModule struct {
-	descriptor func() gotenberg.ModuleDescriptor
-}
-
-func (mod ProtoModule) Descriptor() gotenberg.ModuleDescriptor {
-	return mod.descriptor()
-}
-
-type ProtoValidator struct {
-	ProtoModule
-	validate func() error
-}
-
-func (mod ProtoValidator) Validate() error {
-	return mod.validate()
-}
-
-type ProtoGarbageCollectorGraceDurationModifier struct {
-	ProtoValidator
-	graceDuration func() time.Duration
-}
-
-func (mod ProtoGarbageCollectorGraceDurationModifier) GraceDuration() time.Duration {
-	return mod.graceDuration()
-}
-
-type ProtoGarbageCollectorExcludeSubstrModifier struct {
-	ProtoValidator
-	excludeSubstr func() []string
-}
-
-func (mod ProtoGarbageCollectorExcludeSubstrModifier) ExcludeSubstr() []string {
-	return mod.excludeSubstr()
-}
-
-type ProtoLoggerProvider struct {
-	ProtoModule
-	logger func(mod gotenberg.Module) (*zap.Logger, error)
-}
-
-func (factory ProtoLoggerProvider) Logger(mod gotenberg.Module) (*zap.Logger, error) {
-	return factory.logger(mod)
-}
-
-func TestGarbageCollector_Descriptor(t *testing.T) {
-	descriptor := GarbageCollector{}.Descriptor()
-
-	actual := reflect.TypeOf(descriptor.New())
-	expect := reflect.TypeOf(new(GarbageCollector))
-
-	if actual != expect {
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
-	}
-}
-
-func TestGarbageCollector_Provision(t *testing.T) {
-	for i, tc := range []struct {
-		ctx                 *gotenberg.Context
-		expectGraceDuration time.Duration
-		expectExcludeSubstr []string
-		expectErr           bool
-	}{
-		{
-			ctx: func() *gotenberg.Context {
-				mod := struct {
-					ProtoGarbageCollectorGraceDurationModifier
-				}{}
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
-				}
-				mod.validate = func() error { return errors.New("foo") }
-
-				return gotenberg.NewContext(gotenberg.ParsedFlags{}, []gotenberg.ModuleDescriptor{
-					mod.Descriptor(),
-				})
-			}(),
-			expectErr: true,
-		},
-		{
-			ctx: func() *gotenberg.Context {
-				mod := struct {
-					ProtoGarbageCollectorExcludeSubstrModifier
-				}{}
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
-				}
-				mod.validate = func() error { return errors.New("foo") }
-
-				return gotenberg.NewContext(gotenberg.ParsedFlags{}, []gotenberg.ModuleDescriptor{
-					mod.Descriptor(),
-				})
-			}(),
-			expectErr: true,
-		},
-		{
-			ctx:       gotenberg.NewContext(gotenberg.ParsedFlags{}, make([]gotenberg.ModuleDescriptor, 0)),
-			expectErr: true,
-		},
-		{
-			ctx: func() *gotenberg.Context {
-				mod := struct {
-					ProtoLoggerProvider
-				}{}
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
-				}
-				mod.logger = func(mod gotenberg.Module) (*zap.Logger, error) { return nil, errors.New("foo") }
-
-				return gotenberg.NewContext(gotenberg.ParsedFlags{}, []gotenberg.ModuleDescriptor{
-					mod.Descriptor(),
-				})
-			}(),
-			expectErr: true,
-		},
-		{
-			ctx: func() *gotenberg.Context {
-				mod := struct {
-					ProtoLoggerProvider
-				}{}
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
-				}
-				mod.logger = func(mod gotenberg.Module) (*zap.Logger, error) { return zap.NewNop(), nil }
-
-				return gotenberg.NewContext(gotenberg.ParsedFlags{}, []gotenberg.ModuleDescriptor{
-					mod.Descriptor(),
-				})
-			}(),
-		},
-		{
-			ctx: func() *gotenberg.Context {
-				mod1 := struct {
-					ProtoGarbageCollectorGraceDurationModifier
-				}{}
-				mod1.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod1 }}
-				}
-				mod1.graceDuration = func() time.Duration { return time.Duration(10) * time.Second }
-				mod1.validate = func() error { return nil }
-
-				mod2 := struct {
-					ProtoGarbageCollectorGraceDurationModifier
-				}{}
-				mod2.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod2 }}
-				}
-				mod2.graceDuration = func() time.Duration { return time.Duration(20) * time.Second }
-				mod2.validate = func() error { return nil }
-
-				mod3 := struct {
-					ProtoLoggerProvider
-				}{}
-				mod3.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "baz", New: func() gotenberg.Module { return mod3 }}
-				}
-				mod3.logger = func(mod gotenberg.Module) (*zap.Logger, error) { return zap.NewNop(), nil }
-
-				return gotenberg.NewContext(gotenberg.ParsedFlags{}, []gotenberg.ModuleDescriptor{
-					mod1.Descriptor(),
-					mod2.Descriptor(),
-					mod3.Descriptor(),
-				})
-			}(),
-			expectGraceDuration: time.Duration(20) * time.Second,
-		},
-		{
-			ctx: func() *gotenberg.Context {
-				mod1 := struct {
-					ProtoGarbageCollectorExcludeSubstrModifier
-				}{}
-				mod1.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod1 }}
-				}
-				mod1.excludeSubstr = func() []string { return []string{"foo"} }
-				mod1.validate = func() error { return nil }
-
-				mod2 := struct {
-					ProtoGarbageCollectorExcludeSubstrModifier
-				}{}
-				mod2.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod2 }}
-				}
-				mod2.excludeSubstr = func() []string { return []string{"bar"} }
-				mod2.validate = func() error { return nil }
-
-				mod3 := struct {
-					ProtoLoggerProvider
-				}{}
-				mod3.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "baz", New: func() gotenberg.Module { return mod3 }}
-				}
-				mod3.logger = func(mod gotenberg.Module) (*zap.Logger, error) { return zap.NewNop(), nil }
-
-				return gotenberg.NewContext(gotenberg.ParsedFlags{}, []gotenberg.ModuleDescriptor{
-					mod1.Descriptor(),
-					mod2.Descriptor(),
-					mod3.Descriptor(),
-				})
-			}(),
-			expectExcludeSubstr: func() []string {
-				expect := strings.Split(os.Getenv("GC_EXCLUDE_SUBSTR"), ",")
-				return append(expect, "foo", "bar")
-			}(),
-		},
-	} {
-		mod := new(GarbageCollector)
-		err := mod.Provision(tc.ctx)
-
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
-
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
-
-		if tc.expectGraceDuration != 0 && tc.expectGraceDuration != mod.graceDuration {
-			t.Errorf("test %d: expected grace duration of '%s' but got '%s'", i, tc.expectGraceDuration, mod.graceDuration)
-		}
-
-		if tc.expectExcludeSubstr != nil && !reflect.DeepEqual(tc.expectExcludeSubstr, mod.excludeSubstr) {
-			t.Errorf("test %d: expected exclude substr '%s' but got '%s'", i, tc.expectExcludeSubstr, mod.excludeSubstr)
-		}
-	}
-}
-
-func TestGarbageCollector_Start(t *testing.T) {
-	mod := new(GarbageCollector)
-	mod.logger = zap.NewNop()
-
-	path, err := gotenberg.MkdirAll()
-	if err != nil {
-		t.Fatalf("expected no error but got: %v", err)
-	}
-
-	mod.rootPath = path
-
-	err = mod.Start()
-	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
-	}
-
-	time.Sleep(time.Duration(2) * time.Second)
-	mod.ticker.Stop()
-	mod.done <- true
-}
-
-func TestGarbageCollector_collect(t *testing.T) {
-	for i, tc := range []struct {
-		gc              *GarbageCollector
-		expectNotExists []string
-		expectExists    []string
-		force           bool
-	}{
-		{
-			gc: func() *GarbageCollector {
-				mod := new(GarbageCollector)
-				mod.logger = zap.NewNop()
-
-				path, err := gotenberg.MkdirAll()
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				mod.rootPath = path
-
-				err = os.WriteFile(path+"/foo", []byte{1}, 0755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				mod.excludeSubstr = []string{
-					"foo",
-				}
-
-				return mod
-			}(),
-			expectExists: []string{
-				"/foo",
-			},
-		},
-		{
-			gc: func() *GarbageCollector {
-				mod := new(GarbageCollector)
-				mod.logger = zap.NewNop()
-
-				path, err := gotenberg.MkdirAll()
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				mod.rootPath = path
-
-				err = os.WriteFile(path+"/foo", []byte{1}, 0755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				err = os.MkdirAll(path+"/bar", 0755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return mod
-			}(),
-			expectNotExists: []string{
-				"/foo",
-				"/bar",
-			},
-			force: true,
-		},
-		{
-			gc: func() *GarbageCollector {
-				mod := new(GarbageCollector)
-				mod.logger = zap.NewNop()
-				mod.graceDuration = time.Duration(10) * time.Second
-
-				path, err := gotenberg.MkdirAll()
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				mod.rootPath = path
-
-				err = os.WriteFile(path+"/foo", []byte{1}, 0755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				newTime := time.Now().Add(-time.Duration(20) * time.Second)
-				err = os.Chtimes(path+"/foo", newTime, newTime)
-
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				err = os.WriteFile(path+"/bar", []byte{1}, 0755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				newTime = time.Now().Add(time.Duration(10) * time.Second)
-				err = os.Chtimes(path+"/bar", newTime, newTime)
-
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return mod
-			}(),
-			expectNotExists: []string{
-				"/foo",
-			},
-			expectExists: []string{
-				"/bar",
-			},
-		},
-	} {
-		tc.gc.collect(tc.force)
-
-		for _, name := range tc.expectNotExists {
-			path := tc.gc.rootPath + name
-			_, err := os.Stat(path)
-			if !os.IsNotExist(err) {
-				t.Errorf("test %d: expected '%s' not to exist but got: %v", i, path, err)
-			}
-		}
-
-		for _, name := range tc.expectExists {
-			path := tc.gc.rootPath + name
-			_, err := os.Stat(path)
-			if os.IsNotExist(err) {
-				t.Errorf("test %d: expected '%s' to exist but got: %v", i, path, err)
-			}
-		}
-
-		err := os.RemoveAll(tc.gc.rootPath)
-		if err != nil {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
-		}
-	}
-}
-
-func TestGarbageCollector_StartupMessage(t *testing.T) {
-	actual := new(GarbageCollector).StartupMessage()
-	expect := ""
-
-	if actual != expect {
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
-	}
-}
-
-func TestGarbageCollector_Stop(t *testing.T) {
-	for i, tc := range []struct {
-		timeout   time.Duration
-		expectErr bool
-	}{
-		{
-			expectErr: true,
-		},
-		{
-			timeout: time.Duration(1) * time.Nanosecond,
-		},
-	} {
-		func() {
-			mod := new(GarbageCollector)
-			mod.logger = zap.NewNop()
-
-			path, err := gotenberg.MkdirAll()
-			if err != nil {
-				t.Fatalf("test %d: expected no error but got: %v", i, err)
-			}
-
-			mod.rootPath = path
-
-			err = mod.Start()
-			if err != nil {
-				t.Fatalf("test %d: expected no error but got: %v", i, err)
-			}
-
-			if tc.timeout == 0 {
-				err = mod.Stop(context.TODO())
-			} else {
-				ctx, cancel := context.WithTimeout(context.Background(), tc.timeout)
-				defer cancel()
-
-				err = mod.Stop(ctx)
-			}
-
-			if tc.expectErr && err == nil {
-				t.Errorf("test %d: expected error but got: %v", i, err)
-			}
-
-			if !tc.expectErr && err != nil {
-				t.Errorf("test %d: expected no error but got: %v", i, err)
-			}
-		}()
-	}
-}
-
-// Interface guards.
-var (
-	_ gotenberg.Module                      = (*ProtoModule)(nil)
-	_ gotenberg.Validator                   = (*ProtoValidator)(nil)
-	_ GarbageCollectorGraceDurationModifier = (*ProtoGarbageCollectorGraceDurationModifier)(nil)
-	_ gotenberg.Module                      = (*ProtoGarbageCollectorGraceDurationModifier)(nil)
-	_ gotenberg.Validator                   = (*ProtoGarbageCollectorGraceDurationModifier)(nil)
-	_ GarbageCollectorExcludeSubstrModifier = (*ProtoGarbageCollectorExcludeSubstrModifier)(nil)
-	_ gotenberg.Module                      = (*ProtoGarbageCollectorExcludeSubstrModifier)(nil)
-	_ gotenberg.Validator                   = (*ProtoGarbageCollectorExcludeSubstrModifier)(nil)
-	_ gotenberg.LoggerProvider              = (*ProtoLoggerProvider)(nil)
-	_ gotenberg.Module                      = (*ProtoLoggerProvider)(nil)
-)

pkg/modules/libreoffice/api/api.go

@@ -0,0 +1,416 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/alexliesenfeld/health"
+	flag "github.com/spf13/pflag"
+	"go.uber.org/multierr"
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/api"
+)
+
+func init() {
+	gotenberg.MustRegisterModule(new(Api))
+}
+
+var (
+	// ErrInvalidPdfFormats happens if the PDF formats option cannot be handled
+	// by LibreOffice.
+	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")
+)
+
+// Api is a module which provides a [Uno] to interact with LibreOffice.
+type Api struct {
+	autoStart bool
+	args      libreOfficeArguments
+
+	logger      *zap.Logger
+	libreOffice libreOffice
+	supervisor  gotenberg.ProcessSupervisor
+}
+
+// Options gathers available options when converting a document to PDF.
+type Options struct {
+	// Landscape allows to change the orientation of the resulting PDF.
+	// Optional.
+	Landscape bool
+
+	// PageRanges allows to select the pages to convert.
+	// Optional.
+	PageRanges string
+
+	// ExportFormFields allows to... export form fields in the resulting PDF.
+	// Optional.
+	ExportFormFields bool
+
+	// PdfFormats allows to convert the resulting PDF to PDF/A-1b, PDF/A-2b,
+	// PDF/A-3b and PDF/UA.
+	// Optional.
+	PdfFormats gotenberg.PdfFormats
+}
+
+// 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
+	Extensions() []string
+}
+
+// Provider is a module interface which exposes a method for creating a
+// [Uno] for other modules.
+//
+//	func (m *YourModule) Provision(ctx *gotenberg.Context) error {
+//		provider, _ := ctx.Module(new(libreofficeapi.Provider))
+//		libreOffice, _      := provider.(api.Provider).LibreOffice()
+//	}
+type Provider interface {
+	LibreOffice() (Uno, error)
+}
+
+// Descriptor returns a [Api]'s module descriptor.
+func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
+	return gotenberg.ModuleDescriptor{
+		ID: "libreoffice-api",
+		FlagSet: func() *flag.FlagSet {
+			fs := flag.NewFlagSet("api", flag.ExitOnError)
+			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(20)*time.Second, "Maximum duration to wait for LibreOffice to start or restart")
+
+			return fs
+		}(),
+		New: func() gotenberg.Module { return new(Api) },
+	}
+}
+
+// Provision sets the module properties.
+func (a *Api) Provision(ctx *gotenberg.Context) error {
+	flags := ctx.ParsedFlags()
+	a.autoStart = flags.MustBool("libreoffice-auto-start")
+
+	libreOfficeBinPath, ok := os.LookupEnv("LIBREOFFICE_BIN_PATH")
+	if !ok {
+		return errors.New("LIBREOFFICE_BIN_PATH environment variable is not set")
+	}
+
+	unoBinPath, ok := os.LookupEnv("UNOCONVERTER_BIN_PATH")
+	if !ok {
+		return errors.New("UNOCONVERTER_BIN_PATH environment variable is not set")
+	}
+
+	a.args = libreOfficeArguments{
+		binPath:      libreOfficeBinPath,
+		unoBinPath:   unoBinPath,
+		startTimeout: flags.MustDuration("libreoffice-start-timeout"),
+	}
+
+	// Logger.
+	loggerProvider, err := ctx.Module(new(gotenberg.LoggerProvider))
+	if err != nil {
+		return fmt.Errorf("get logger provider: %w", err)
+	}
+	logger, err := loggerProvider.(gotenberg.LoggerProvider).Logger(a)
+	if err != nil {
+		return fmt.Errorf("get logger: %w", err)
+	}
+	a.logger = logger.Named("libreoffice")
+
+	// Process.
+	a.libreOffice = newLibreOfficeProcess(a.args)
+	a.supervisor = gotenberg.NewProcessSupervisor(a.logger, a.libreOffice, flags.MustInt64("libreoffice-restart-after"), flags.MustInt64("libreoffice-max-queue-size"))
+
+	return nil
+}
+
+// Validate validates the module properties.
+func (a *Api) Validate() error {
+	var err error
+
+	_, statErr := os.Stat(a.args.binPath)
+	if os.IsNotExist(statErr) {
+		err = multierr.Append(err, fmt.Errorf("LibreOffice binary path does not exist: %w", statErr))
+	}
+
+	_, statErr = os.Stat(a.args.unoBinPath)
+	if os.IsNotExist(statErr) {
+		err = multierr.Append(err, fmt.Errorf("unoconverter binary path does not exist: %w", statErr))
+	}
+
+	return err
+}
+
+// Start does nothing if auto-start is not enabled. Otherwise, it starts a
+// LibreOffice instance.
+func (a *Api) Start() error {
+	if !a.autoStart {
+		return nil
+	}
+
+	err := a.supervisor.Launch()
+	if err != nil {
+		return fmt.Errorf("launch supervisor: %w", err)
+	}
+
+	return nil
+}
+
+// StartupMessage returns a custom startup message.
+func (a *Api) StartupMessage() string {
+	if !a.autoStart {
+		return "LibreOffice ready to start"
+	}
+
+	return "LibreOffice automatically started"
+}
+
+// Stop stops the current browser instance.
+func (a *Api) Stop(ctx context.Context) error {
+	// Block until the context is done so that other module may gracefully stop
+	// before we do a shutdown.
+	a.logger.Debug("wait for the end of grace duration")
+
+	<-ctx.Done()
+
+	err := a.supervisor.Shutdown()
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("stop LibreOffice: %w", err)
+}
+
+// Metrics returns the metrics.
+func (a *Api) Metrics() ([]gotenberg.Metric, error) {
+	return []gotenberg.Metric{
+		{
+			Name:        "libreoffice_requests_queue_size",
+			Description: "Current number of LibreOffice conversion requests waiting to be treated.",
+			Read: func() float64 {
+				return float64(a.supervisor.ReqQueueSize())
+			},
+		},
+		{
+			Name:        "libreoffice_restarts_count",
+			Description: "Current number of LibreOffice restarts.",
+			Read: func() float64 {
+				return float64(a.supervisor.RestartsCount())
+			},
+		},
+	}, nil
+}
+
+// Checks adds a health check that verifies if LibreOffice is healthy.
+func (a *Api) Checks() ([]health.CheckerOption, error) {
+	return []health.CheckerOption{
+		health.WithCheck(health.Check{
+			Name: "libreoffice",
+			Check: func(_ context.Context) error {
+				if a.supervisor.Healthy() {
+					return nil
+				}
+
+				return errors.New("LibreOffice is unhealthy")
+			},
+		}),
+	}, 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
+}
+
+// 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 {
+		return a.libreOffice.pdf(ctx, logger, inputPath, outputPath, options)
+	})
+}
+
+// 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",
+		".bmp",
+		".cdr",
+		".cgm",
+		".cmx",
+		".csv",
+		".cwk",
+		".dbf",
+		".dif",
+		".doc",
+		".docm",
+		".docx",
+		".dot",
+		".dotm",
+		".dotx",
+		".dxf",
+		".emf",
+		".eps",
+		".epub",
+		".fodg",
+		".fodp",
+		".fods",
+		".fodt",
+		".fopd",
+		".gif",
+		".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",
+		".txt",
+		".uof",
+		".uop",
+		".uos",
+		".uot",
+		".vdx",
+		".vor",
+		".vsd",
+		".vsdm",
+		".vsdx",
+		".wb2",
+		".wk1",
+		".wks",
+		".wmf",
+		".wpd",
+		".wpg",
+		".wps",
+		".xbm",
+		".xhtml",
+		".xls",
+		".xlsb",
+		".xlsm",
+		".xlsx",
+		".xlt",
+		".xltm",
+		".xltx",
+		".xlw",
+		".xml",
+		".xpm",
+		".zabw",
+	}
+}
+
+// Interface guards.
+var (
+	_ gotenberg.Module          = (*Api)(nil)
+	_ gotenberg.Provisioner     = (*Api)(nil)
+	_ gotenberg.Validator       = (*Api)(nil)
+	_ gotenberg.App             = (*Api)(nil)
+	_ gotenberg.MetricsProvider = (*Api)(nil)
+	_ api.HealthChecker         = (*Api)(nil)
+	_ Uno                       = (*Api)(nil)
+	_ Provider                  = (*Api)(nil)
+)

pkg/modules/libreoffice/api/api_test.go

@@ -0,0 +1,458 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"os"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/alexliesenfeld/health"
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+func TestApi_Descriptor(t *testing.T) {
+	descriptor := new(Api).Descriptor()
+
+	actual := reflect.TypeOf(descriptor.New())
+	expect := reflect.TypeOf(new(Api))
+
+	if actual != expect {
+		t.Errorf("expected '%s' but got '%s'", expect, actual)
+	}
+}
+
+func TestApi_Provision(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		ctx         *gotenberg.Context
+		expectError bool
+	}{
+		{
+			scenario: "no logger provider",
+			ctx: func() *gotenberg.Context {
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: new(Api).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{},
+				)
+			}(),
+			expectError: true,
+		},
+		{
+			scenario: "no logger from logger provider",
+			ctx: func() *gotenberg.Context {
+				mod := &struct {
+					gotenberg.ModuleMock
+					gotenberg.LoggerProviderMock
+				}{}
+				mod.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod }}
+				}
+				mod.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
+					return nil, errors.New("foo")
+				}
+
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: new(Api).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{
+						mod.Descriptor(),
+					},
+				)
+			}(),
+			expectError: true,
+		},
+		{
+			scenario: "provision success",
+			ctx: func() *gotenberg.Context {
+				mod := &struct {
+					gotenberg.ModuleMock
+					gotenberg.LoggerProviderMock
+				}{}
+				mod.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod }}
+				}
+				mod.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
+					return zap.NewNop(), nil
+				}
+
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: new(Api).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{
+						mod.Descriptor(),
+					},
+				)
+			}(),
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			err := a.Provision(tc.ctx)
+
+			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_Validate(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		binPath     string
+		unoBinPath  string
+		expectError bool
+	}{
+		{
+			scenario:    "empty LibreOffice bin path",
+			binPath:     "",
+			unoBinPath:  os.Getenv("UNOCONVERTER_BIN_PATH"),
+			expectError: true,
+		},
+		{
+			scenario:    "LibreOffice bin path does not exist",
+			binPath:     "/foo",
+			unoBinPath:  os.Getenv("UNOCONVERTER_BIN_PATH"),
+			expectError: true,
+		},
+		{
+			scenario:    "empty uno bin path",
+			binPath:     os.Getenv("CHROMIUM_BIN_PATH"),
+			unoBinPath:  "",
+			expectError: true,
+		},
+		{
+			scenario:    "uno bin path does not exist",
+			binPath:     os.Getenv("CHROMIUM_BIN_PATH"),
+			unoBinPath:  "/foo",
+			expectError: true,
+		},
+		{
+			scenario:    "validate success",
+			binPath:     os.Getenv("CHROMIUM_BIN_PATH"),
+			unoBinPath:  os.Getenv("UNOCONVERTER_BIN_PATH"),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			a.args = libreOfficeArguments{
+				binPath:    tc.binPath,
+				unoBinPath: tc.unoBinPath,
+			}
+			err := a.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 TestApi_Start(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		autoStart   bool
+		supervisor  *gotenberg.ProcessSupervisorMock
+		expectError bool
+	}{
+		{
+			scenario:    "no auto-start",
+			autoStart:   false,
+			expectError: false,
+		},
+		{
+			scenario:  "auto-start success",
+			autoStart: true,
+			supervisor: &gotenberg.ProcessSupervisorMock{LaunchMock: func() error {
+				return nil
+			}},
+			expectError: false,
+		},
+		{
+			scenario:  "auto-start failed",
+			autoStart: true,
+			supervisor: &gotenberg.ProcessSupervisorMock{LaunchMock: func() error {
+				return errors.New("foo")
+			}},
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			a.autoStart = tc.autoStart
+			a.supervisor = tc.supervisor
+
+			err := a.Start()
+
+			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_StartupMessage(t *testing.T) {
+	a := new(Api)
+
+	a.autoStart = true
+	autoStartMsg := a.StartupMessage()
+
+	a.autoStart = false
+	noAutoStartMsg := a.StartupMessage()
+
+	if autoStartMsg == noAutoStartMsg {
+		t.Errorf("expected differrent startup messages based on auto start, but got '%s'", autoStartMsg)
+	}
+}
+
+func TestApi_Stop(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		supervisor  *gotenberg.ProcessSupervisorMock
+		expectError bool
+	}{
+		{
+			scenario: "stop success",
+			supervisor: &gotenberg.ProcessSupervisorMock{ShutdownMock: func() error {
+				return nil
+			}},
+			expectError: false,
+		},
+		{
+			scenario: "stop failed",
+			supervisor: &gotenberg.ProcessSupervisorMock{ShutdownMock: func() error {
+				return errors.New("foo")
+			}},
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			a.logger = zap.NewNop()
+			a.supervisor = tc.supervisor
+
+			ctx, cancel := context.WithTimeout(context.Background(), 0*time.Second)
+			cancel()
+
+			err := a.Stop(ctx)
+
+			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_Metrics(t *testing.T) {
+	a := new(Api)
+	a.supervisor = &gotenberg.ProcessSupervisorMock{
+		ReqQueueSizeMock: func() int64 {
+			return 10
+		},
+		RestartsCountMock: func() int64 {
+			return 0
+		},
+	}
+
+	metrics, err := a.Metrics()
+	if err != nil {
+		t.Fatalf("expected no error but got: %v", err)
+	}
+
+	if len(metrics) != 2 {
+		t.Fatalf("expected %d metrics, but got %d", 2, len(metrics))
+	}
+
+	actual := metrics[0].Read()
+	if actual != float64(10) {
+		t.Errorf("expected %f for libreoffice_requests_queue_size, but got %f", float64(10), actual)
+	}
+
+	actual = metrics[1].Read()
+	if actual != float64(0) {
+		t.Errorf("expected %f for libreoffice_restarts_count, but got %f", float64(0), actual)
+	}
+}
+
+func TestApi_Checks(t *testing.T) {
+	for _, tc := range []struct {
+		scenario                 string
+		supervisor               gotenberg.ProcessSupervisor
+		expectAvailabilityStatus health.AvailabilityStatus
+	}{
+		{
+			scenario: "healthy module",
+			supervisor: &gotenberg.ProcessSupervisorMock{HealthyMock: func() bool {
+				return true
+			}},
+			expectAvailabilityStatus: health.StatusUp,
+		},
+		{
+			scenario: "unhealthy module",
+			supervisor: &gotenberg.ProcessSupervisorMock{HealthyMock: func() bool {
+				return false
+			}},
+			expectAvailabilityStatus: health.StatusDown,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			a.supervisor = tc.supervisor
+
+			checks, err := a.Checks()
+			if err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			checker := health.NewChecker(checks...)
+			result := checker.Check(context.Background())
+
+			if result.Status != tc.expectAvailabilityStatus {
+				t.Errorf("expected '%s' as availability status, but got '%s'", tc.expectAvailabilityStatus, result.Status)
+			}
+		})
+	}
+}
+
+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)
+
+	_, err := a.LibreOffice()
+	if err != nil {
+		t.Errorf("expected no error but got: %v", err)
+	}
+}
+
+func TestApi_Pdf(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		supervisor  gotenberg.ProcessSupervisor
+		libreOffice libreOffice
+		expectError bool
+	}{
+		{
+			scenario: "PDF task success",
+			libreOffice: &libreOfficeMock{pdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+				return nil
+			}},
+			expectError: false,
+		},
+		{
+			scenario: "PDF task error",
+			libreOffice: &libreOfficeMock{pdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+				return errors.New("PDF task error")
+			}},
+			expectError: true,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			a := new(Api)
+			a.supervisor = &gotenberg.ProcessSupervisorMock{RunMock: func(ctx context.Context, logger *zap.Logger, task func() error) error {
+				return task()
+			}}
+			a.libreOffice = tc.libreOffice
+
+			err := a.Pdf(context.Background(), zap.NewNop(), "", "", Options{})
+
+			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_Extensions(t *testing.T) {
+	a := new(Api)
+	extensions := a.Extensions()
+
+	actual := len(extensions)
+	expect := 130
+
+	if actual != expect {
+		t.Errorf("expected %d extensions, but got %d", expect, actual)
+	}
+}

pkg/modules/libreoffice/api/doc.go

@@ -0,0 +1,3 @@
+// Package api provides a module which manages a LibreOffice instance and
+// interacts with it via the UNO (Universal Network Objects) API.
+package api

pkg/modules/libreoffice/api/freeport.go

@@ -1,4 +1,4 @@
-package uno
+package api
 
 import (
 	"fmt"

pkg/modules/libreoffice/api/libreoffice.go

@@ -0,0 +1,405 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"os"
+	"path/filepath"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+type libreOffice interface {
+	gotenberg.Process
+	pdf(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error
+}
+
+type libreOfficeArguments struct {
+	binPath      string
+	unoBinPath   string
+	startTimeout time.Duration
+}
+
+type libreOfficeProcess struct {
+	socketPort         int
+	userProfileDirPath string
+	cmd                *gotenberg.Cmd
+	cfgMu              sync.RWMutex
+	isStarted          atomic.Bool
+
+	arguments libreOfficeArguments
+	fs        *gotenberg.FileSystem
+}
+
+func newLibreOfficeProcess(arguments libreOfficeArguments) libreOffice {
+	p := &libreOfficeProcess{
+		arguments: arguments,
+		fs:        gotenberg.NewFileSystem(),
+	}
+	p.isStarted.Store(false)
+
+	return p
+}
+
+func (p *libreOfficeProcess) Start(logger *zap.Logger) error {
+	if p.isStarted.Load() {
+		return errors.New("LibreOffice is already started")
+	}
+
+	port, err := freePort(logger)
+	if err != nil {
+		return fmt.Errorf("get free port: %w", err)
+	}
+
+	userProfileDirPath := p.fs.NewDirPath()
+	args := []string{
+		"--headless",
+		"--invisible",
+		"--nocrashreport",
+		"--nodefault",
+		"--nologo",
+		"--nofirststartwizard",
+		"--norestore",
+		fmt.Sprintf("-env:UserInstallation=file://%s", userProfileDirPath),
+		fmt.Sprintf("--accept=socket,host=127.0.0.1,port=%d,tcpNoDelay=1;urp;StarOffice.ComponentContext", port),
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), p.arguments.startTimeout)
+	defer cancel()
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, p.arguments.binPath, args...)
+	if err != nil {
+		return fmt.Errorf("create LibreOffice command: %w", err)
+	}
+
+	// For whatever reason, LibreOffice requires a first start before being
+	// able to run as a daemon.
+	exitCode, err := cmd.Exec()
+	if err != nil && exitCode != 81 {
+		return fmt.Errorf("execute LibreOffice: %w", err)
+	}
+
+	logger.Debug("got exit code 81, e.g., LibreOffice first start")
+
+	// Second start (daemon).
+	cmd = gotenberg.Command(logger, p.arguments.binPath, args...)
+
+	err = cmd.Start()
+	if err != nil {
+		return fmt.Errorf("start LibreOffice: %w", err)
+	}
+
+	waitChan := make(chan error, 1)
+
+	go func() {
+		// By waiting the process, we avoid the creation of a zombie process
+		// and make sure we catch an early exit if any.
+		waitChan <- cmd.Wait()
+	}()
+
+	connChan := make(chan error, 1)
+
+	go func() {
+		// As the LibreOffice socket may take some time to be available, we
+		// have to ensure that it is indeed accepting connections.
+		for {
+			if ctx.Err() != nil {
+				connChan <- ctx.Err()
+				break
+			}
+
+			conn, err := net.DialTimeout("tcp", fmt.Sprintf("127.0.0.1:%d", port), time.Duration(1)*time.Second)
+			if err != nil {
+				continue
+			}
+
+			connChan <- nil
+			err = conn.Close()
+			if err != nil {
+				logger.Debug(fmt.Sprintf("close connection after health checking the LibreOffice: %v", err))
+			}
+
+			break
+		}
+	}()
+
+	var success bool
+
+	defer func() {
+		if success {
+			p.cfgMu.Lock()
+			defer p.cfgMu.Unlock()
+
+			p.socketPort = port
+			p.userProfileDirPath = userProfileDirPath
+			p.cmd = cmd
+			p.isStarted.Store(true)
+
+			return
+		}
+
+		// Let's make sure the process is killed.
+		err = cmd.Kill()
+		if err != nil {
+			logger.Debug(fmt.Sprintf("kill LibreOffice process: %v", err))
+		}
+
+		// And the user profile directory is deleted.
+		err = os.RemoveAll(userProfileDirPath)
+		if err != nil {
+			logger.Error(fmt.Sprintf("remove LibreOffice's user profile directory: %v", err))
+		}
+
+		logger.Debug(fmt.Sprintf("'%s' LibreOffice's user profile directory removed", userProfileDirPath))
+	}()
+
+	logger.Debug("waiting for the LibreOffice socket to be available...")
+
+	for {
+		select {
+		case err = <-connChan:
+			if err != nil {
+				return fmt.Errorf("LibreOffice socket not available: %w", err)
+			}
+
+			logger.Debug("LibreOffice socket available")
+			success = true
+
+			return nil
+		case err = <-waitChan:
+			return fmt.Errorf("LibreOffice process exited: %w", err)
+		}
+	}
+}
+
+func (p *libreOfficeProcess) Stop(logger *zap.Logger) error {
+	if !p.isStarted.Load() {
+		// No big deal? Like calling cancel twice.
+		return nil
+	}
+
+	// Always remove the user profile directory created by LibreOffice.
+	copyUserProfileDirPath := p.userProfileDirPath
+	defer func(userProfileDirPath string) {
+		go func() {
+			err := os.RemoveAll(userProfileDirPath)
+			if err != nil {
+				logger.Error(fmt.Sprintf("remove LibreOffice's user profile directory: %v", err))
+			}
+
+			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"})
+			if err != nil {
+				logger.Error(err.Error())
+			}
+		}()
+	}(copyUserProfileDirPath)
+
+	p.cfgMu.Lock()
+	defer p.cfgMu.Unlock()
+
+	err := p.cmd.Kill()
+	if err != nil {
+		return fmt.Errorf("kill LibreOffice process: %w", err)
+	}
+
+	p.socketPort = 0
+	p.userProfileDirPath = ""
+	p.cmd = nil
+	p.isStarted.Store(false)
+
+	return nil
+}
+
+func (p *libreOfficeProcess) Healthy(logger *zap.Logger) bool {
+	// Good to know: the supervisor does not call this method if no first start
+	// or if the process is restarting.
+
+	if !p.isStarted.Load() {
+		// Non-started browser but not restarting?
+		return false
+	}
+
+	p.cfgMu.RLock()
+	defer p.cfgMu.RUnlock()
+
+	conn, err := net.DialTimeout("tcp", fmt.Sprintf("127.0.0.1:%d", p.socketPort), time.Duration(10)*time.Second)
+	if err == nil {
+		err = conn.Close()
+		if err != nil {
+			logger.Debug(fmt.Sprintf("close connection after health checking LibreOffice: %v", err))
+		}
+
+		return true
+	}
+
+	return false
+}
+
+func (p *libreOfficeProcess) pdf(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
+	if !p.isStarted.Load() {
+		return errors.New("LibreOffice not started, cannot handle PDF conversion")
+	}
+
+	args := []string{
+		"--no-launch",
+		"--format",
+		"pdf",
+	}
+
+	args = append(args, "--port", fmt.Sprintf("%d", p.socketPort))
+
+	checkedEntry := logger.Check(zap.DebugLevel, "check for debug level before setting high verbosity")
+	if checkedEntry != nil {
+		args = append(args, "-vvv")
+	}
+
+	if options.Landscape {
+		args = append(args, "--printer", "PaperOrientation=landscape")
+	}
+
+	if options.PageRanges != "" {
+		args = append(args, "--export", fmt.Sprintf("PageRange=%s", options.PageRanges))
+	}
+
+	if !options.ExportFormFields {
+		args = append(args, "--export", "ExportFormFields=false")
+	}
+
+	switch options.PdfFormats.PdfA {
+	case "":
+	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 ErrInvalidPdfFormats
+	}
+
+	if options.PdfFormats.PdfUa {
+		args = append(
+			args,
+			"--export", "UseTaggedPDF=true",
+			"--export", "EnableTextAccessForAccessibilityTools=true",
+		)
+	} else {
+		args = append(
+			args,
+			"--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)
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, p.arguments.unoBinPath, args...)
+	if err != nil {
+		return fmt.Errorf("create uno command: %w", err)
+	}
+
+	logger.Debug(fmt.Sprintf("print to PDF with: %+v", options))
+
+	exitCode, err := cmd.Exec()
+	if err == nil {
+		return nil
+	}
+
+	// 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
+	}
+
+	// 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)
+	_ libreOffice       = (*libreOfficeProcess)(nil)
+)

pkg/modules/libreoffice/api/libreoffice_test.go

@@ -0,0 +1,679 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+func TestLibreOfficeProcess_Start(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		libreOffice libreOffice
+		expectError bool
+		cleanup     bool
+	}{
+		{
+			scenario: "successful start",
+			libreOffice: newLibreOfficeProcess(
+				libreOfficeArguments{
+					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
+					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
+					startTimeout: 5 * time.Second,
+				},
+			),
+			expectError: false,
+			cleanup:     true,
+		},
+		{
+			scenario: "LibreOffice already started",
+			libreOffice: func() libreOffice {
+				p := new(libreOfficeProcess)
+				p.isStarted.Store(true)
+				return p
+			}(),
+			expectError: true,
+			cleanup:     false,
+		},
+		{
+			scenario: "non-exit code 81 on first start",
+			libreOffice: newLibreOfficeProcess(
+				libreOfficeArguments{
+					binPath:      "foo",
+					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
+					startTimeout: 5 * time.Second,
+				},
+			),
+			expectError: true,
+			cleanup:     false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+			err := tc.libreOffice.Start(logger)
+
+			if tc.cleanup {
+				defer func(p libreOffice, logger *zap.Logger) {
+					err = p.Stop(logger)
+					if err != nil {
+						t.Fatalf("expected no error while cleaning up, but got: %v", err)
+					}
+				}(tc.libreOffice, logger)
+			}
+
+			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 TestLibreOfficeProcess_Stop(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		libreOffice libreOffice
+		setup       func(libreOffice libreOffice, logger *zap.Logger) error
+		expectError bool
+	}{
+		{
+			scenario: "successful stop",
+			libreOffice: newLibreOfficeProcess(
+				libreOfficeArguments{
+					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
+					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
+					startTimeout: 5 * time.Second,
+				},
+			),
+			setup: func(p libreOffice, logger *zap.Logger) error {
+				return p.Start(logger)
+			},
+			expectError: false,
+		},
+		{
+			scenario: "LibreOffice already stopped",
+			libreOffice: func() libreOffice {
+				p := new(libreOfficeProcess)
+				p.isStarted.Store(false)
+				return p
+			}(),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			if tc.setup != nil {
+				err := tc.setup(tc.libreOffice, logger)
+				if err != nil {
+					t.Fatalf("setup error: %v", err)
+				}
+			}
+
+			err := tc.libreOffice.Stop(logger)
+
+			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 TestLibreOfficeProcess_Healthy(t *testing.T) {
+	for _, tc := range []struct {
+		scenario      string
+		libreOffice   libreOffice
+		setup         func(libreOffice libreOffice, logger *zap.Logger) error
+		expectHealthy bool
+		cleanup       bool
+	}{
+		{
+			scenario: "healthy LibreOffice",
+			libreOffice: newLibreOfficeProcess(
+				libreOfficeArguments{
+					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
+					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
+					startTimeout: 5 * time.Second,
+				},
+			),
+			setup: func(p libreOffice, logger *zap.Logger) error {
+				return p.Start(logger)
+			},
+			expectHealthy: true,
+			cleanup:       true,
+		},
+		{
+			scenario: "LibreOffice not started",
+			libreOffice: func() libreOffice {
+				p := new(libreOfficeProcess)
+				p.isStarted.Store(false)
+				return p
+			}(),
+			expectHealthy: false,
+			cleanup:       false,
+		},
+		{
+			scenario: "unhealthy LibreOffice",
+			libreOffice: func() libreOffice {
+				p := new(libreOfficeProcess)
+				p.isStarted.Store(true)
+				p.socketPort = 12345
+				return p
+			}(),
+			expectHealthy: false,
+			cleanup:       false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			logger := zap.NewNop()
+
+			if tc.setup != nil {
+				err := tc.setup(tc.libreOffice, logger)
+				if err != nil {
+					t.Fatalf("setup error: %v", err)
+				}
+			}
+
+			if tc.cleanup {
+				defer func(p libreOffice, logger *zap.Logger) {
+					err := p.Stop(logger)
+					if err != nil {
+						t.Fatalf("expected no error while cleaning up, but got: %v", err)
+					}
+				}(tc.libreOffice, logger)
+			}
+
+			healthy := tc.libreOffice.Healthy(logger)
+
+			if !tc.expectHealthy && healthy {
+				t.Fatal("expected unhealthy LibreOffice but got an healthy one")
+			}
+
+			if tc.expectHealthy && !healthy {
+				t.Fatal("expected a healthy LibreOffice but got an unhealthy one")
+			}
+		})
+	}
+}
+
+func TestLibreOfficeProcess_pdf(t *testing.T) {
+	for _, tc := range []struct {
+		scenario      string
+		libreOffice   libreOffice
+		fs            *gotenberg.FileSystem
+		options       Options
+		cancelledCtx  bool
+		start         bool
+		expectError   bool
+		expectedError error
+	}{
+		{
+			scenario: "LibreOffice not started",
+			libreOffice: func() libreOffice {
+				p := new(libreOfficeProcess)
+				p.isStarted.Store(false)
+				return p
+			}(),
+			fs:           gotenberg.NewFileSystem(),
+			cancelledCtx: false,
+			start:        false,
+			expectError:  true,
+		},
+		{
+			scenario: "ErrInvalidPdfFormats",
+			libreOffice: func() libreOffice {
+				p := new(libreOfficeProcess)
+				p.socketPort = 12345
+				p.isStarted.Store(true)
+				return p
+			}(),
+			fs:            gotenberg.NewFileSystem(),
+			options:       Options{PdfFormats: gotenberg.PdfFormats{PdfA: "foo"}},
+			cancelledCtx:  false,
+			start:         false,
+			expectError:   true,
+			expectedError: ErrInvalidPdfFormats,
+		},
+		{
+			scenario: "ErrMalformedPageRanges",
+			libreOffice: newLibreOfficeProcess(
+				libreOfficeArguments{
+					binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
+					unoBinPath:   os.Getenv("UNOCONVERTER_BIN_PATH"),
+					startTimeout: 5 * time.Second,
+				},
+			),
+			options: Options{PageRanges: "foo"},
+			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("ErrMalformedPageRanges"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			cancelledCtx:  false,
+			start:         true,
+			expectError:   true,
+			expectedError: ErrMalformedPageRanges,
+		},
+		{
+			scenario: "context done",
+			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("Context done"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			cancelledCtx: true,
+			start:        true,
+			expectError:  true,
+		},
+		{
+			scenario: "success (default options)",
+			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("Success"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (landscape)",
+			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{Landscape: true},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (disable form fields)",
+			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("DisableFormFields"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			options:      Options{ExportFormFields: false},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (page ranges)",
+			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{PageRanges: "1-1"},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (PDF/A-1b)",
+			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.PdfA1b}},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (PDF/A-2b)",
+			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.PdfA2b}},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (PDF/A-3b)",
+			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.PdfA3b}},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+		{
+			scenario: "success (PDF/UA)",
+			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{PdfUa: true}},
+			cancelledCtx: false,
+			start:        true,
+			expectError:  false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			// Force the debug level.
+			logger := zap.NewExample()
+
+			defer func() {
+				err := os.RemoveAll(tc.fs.WorkingDirPath())
+				if err != nil {
+					t.Fatalf("expected no error while cleaning up, but got: %v", err)
+				}
+			}()
+
+			if tc.start {
+				err := tc.libreOffice.Start(logger)
+				if err != nil {
+					t.Fatalf("setup error: %v", err)
+				}
+
+				defer func(p libreOffice, logger *zap.Logger) {
+					err = p.Stop(logger)
+					if err != nil {
+						t.Fatalf("expected no error while cleaning up, but got: %v", err)
+					}
+				}(tc.libreOffice, logger)
+			}
+
+			ctx, cancel := context.WithTimeout(context.Background(), time.Duration(5)*time.Second)
+			defer cancel()
+
+			if tc.cancelledCtx {
+				cancel()
+			}
+
+			err := tc.libreOffice.pdf(
+				ctx,
+				logger,
+				fmt.Sprintf("%s/document.txt", tc.fs.WorkingDirPath()),
+				fmt.Sprintf("%s/%s.pdf", tc.fs.WorkingDirPath(), uuid.NewString()),
+				tc.options,
+			)
+
+			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)
+			}
+		})
+	}
+}
+
+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()
+
+				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()
+
+				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

@@ -0,0 +1,49 @@
+package api
+
+import (
+	"context"
+
+	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+)
+
+// ApiMock is a mock for the [Uno] interface.
+type ApiMock struct {
+	PdfMock        func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error
+	ExtensionsMock func() []string
+}
+
+func (api *ApiMock) Pdf(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
+	return api.PdfMock(ctx, logger, inputPath, outputPath, options)
+}
+
+func (api *ApiMock) Extensions() []string {
+	return api.ExtensionsMock()
+}
+
+// ProviderMock is a mock for the [Provider] interface.
+type ProviderMock struct {
+	LibreOfficeMock func() (Uno, error)
+}
+
+func (provider *ProviderMock) LibreOffice() (Uno, error) {
+	return provider.LibreOfficeMock()
+}
+
+// libreOfficeMock is a mock for the [libreOffice] interface.
+type libreOfficeMock struct {
+	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)
+}
+
+// Interface guards.
+var (
+	_ Uno         = (*ApiMock)(nil)
+	_ Provider    = (*ProviderMock)(nil)
+	_ libreOffice = (*libreOfficeMock)(nil)
+)

pkg/modules/libreoffice/api/mocks_test.go

@@ -0,0 +1,55 @@
+package api
+
+import (
+	"context"
+	"testing"
+
+	"go.uber.org/zap"
+)
+
+func TestApiMock(t *testing.T) {
+	mock := &ApiMock{
+		PdfMock: func(ctx context.Context, logger *zap.Logger, input, outputPath string, options Options) error {
+			return nil
+		},
+		ExtensionsMock: func() []string {
+			return nil
+		},
+	}
+
+	err := mock.Pdf(context.Background(), zap.NewNop(), "", "", Options{})
+	if err != nil {
+		t.Errorf("expected no error from ApiMock.Pdf, but got: %v", err)
+	}
+
+	ext := mock.Extensions()
+	if ext != nil {
+		t.Errorf("expected nil result from ApiMock.Extensions, but got: %v", ext)
+	}
+}
+
+func TestProviderMock(t *testing.T) {
+	mock := &ProviderMock{
+		LibreOfficeMock: func() (Uno, error) {
+			return nil, nil
+		},
+	}
+
+	_, err := mock.LibreOffice()
+	if err != nil {
+		t.Errorf("expected no error from ProviderMock.LibreOffice, but got: %v", err)
+	}
+}
+
+func TestLibreOfficeMock(t *testing.T) {
+	mock := &libreOfficeMock{
+		pdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
+			return nil
+		},
+	}
+
+	err := mock.pdf(context.Background(), zap.NewNop(), "", "", Options{})
+	if err != nil {
+		t.Errorf("expected no error from libreOfficeMock.pdf, but got: %v", err)
+	}
+}

pkg/modules/libreoffice/libreoffice.go

@@ -3,26 +3,27 @@ package libreoffice
 import (
 	"fmt"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	flag "github.com/spf13/pflag"
+
+	"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() {
-	gotenberg.MustRegisterModule(LibreOffice{})
+	gotenberg.MustRegisterModule(new(LibreOffice))
 }
 
 // LibreOffice is a module which provides a route for converting documents to
 // PDF with LibreOffice.
 type LibreOffice struct {
-	unoAPI        uno.API
-	engine        gotenberg.PDFEngine
+	api           libeofficeapi.Uno
+	engine        gotenberg.PdfEngine
 	disableRoutes bool
 }
 
-// Descriptor returns a LibreOffice's module descriptor.
-func (LibreOffice) Descriptor() gotenberg.ModuleDescriptor {
+// Descriptor returns a [LibreOffice]'s module descriptor.
+func (mod *LibreOffice) Descriptor() gotenberg.ModuleDescriptor {
 	return gotenberg.ModuleDescriptor{
 		ID: "libreoffice",
 		FlagSet: func() *flag.FlagSet {
@@ -40,24 +41,24 @@ func (mod *LibreOffice) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
 	mod.disableRoutes = flags.MustBool("libreoffice-disable-routes")
 
-	provider, err := ctx.Module(new(uno.Provider))
+	provider, err := ctx.Module(new(libeofficeapi.Provider))
 	if err != nil {
-		return fmt.Errorf("get unoAPI provider: %w", err)
+		return fmt.Errorf("get LibreOffice Uno provider: %w", err)
 	}
 
-	unoAPI, err := provider.(uno.Provider).UNO()
+	libreOfficeApi, err := provider.(libeofficeapi.Provider).LibreOffice()
 	if err != nil {
-		return fmt.Errorf("get unoAPI API: %w", err)
+		return fmt.Errorf("get LibreOffice Uno: %w", err)
 	}
 
-	mod.unoAPI = unoAPI
+	mod.api = libreOfficeApi
 
-	provider, err = ctx.Module(new(gotenberg.PDFEngineProvider))
+	provider, err = ctx.Module(new(gotenberg.PdfEngineProvider))
 	if err != nil {
 		return fmt.Errorf("get PDF engine provider: %w", err)
 	}
 
-	engine, err := provider.(gotenberg.PDFEngineProvider).PDFEngine()
+	engine, err := provider.(gotenberg.PdfEngineProvider).PdfEngine()
 	if err != nil {
 		return fmt.Errorf("get PDF engine: %w", err)
 	}
@@ -68,13 +69,13 @@ func (mod *LibreOffice) Provision(ctx *gotenberg.Context) error {
 }
 
 // Routes returns the HTTP routes.
-func (mod LibreOffice) Routes() ([]api.Route, error) {
+func (mod *LibreOffice) Routes() ([]api.Route, error) {
 	if mod.disableRoutes {
 		return nil, nil
 	}
 
 	return []api.Route{
-		convertRoute(mod.unoAPI, mod.engine),
+		convertRoute(mod.api, mod.engine),
 	}, nil
 }
 

pkg/modules/libreoffice/libreoffice_test.go

@@ -5,12 +5,12 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	libreofficeapi "github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func TestLibreOffice_Descriptor(t *testing.T) {
-	descriptor := LibreOffice{}.Descriptor()
+	descriptor := new(LibreOffice).Descriptor()
 
 	actual := reflect.TypeOf(descriptor.New())
 	expect := reflect.TypeOf(new(LibreOffice))
@@ -21,38 +21,35 @@ func TestLibreOffice_Descriptor(t *testing.T) {
 }
 
 func TestLibreOffice_Provision(t *testing.T) {
-	tests := []struct {
-		name               string
-		ctx                *gotenberg.Context
-		expectProvisionErr bool
+	for _, tc := range []struct {
+		scenario    string
+		ctx         *gotenberg.Context
+		expectError bool
 	}{
 		{
-			name: "nominal behavior",
+			scenario: "no LibreOffice API provider",
 			ctx: func() *gotenberg.Context {
-				provider1 := struct {
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: new(LibreOffice).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{},
+				)
+			}(),
+			expectError: true,
+		},
+		{
+			scenario: "no LibreOffice API from LibreOffice API provider",
+			ctx: func() *gotenberg.Context {
+				mod := &struct {
 					gotenberg.ModuleMock
-					uno.ProviderMock
+					libreofficeapi.ProviderMock
 				}{}
-				provider1.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider1
-					}}
+				mod.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod }}
 				}
-				provider1.UNOMock = func() (uno.API, error) {
-					return uno.APIMock{}, nil
-				}
-
-				provider2 := struct {
-					gotenberg.ModuleMock
-					gotenberg.PDFEngineProviderMock
-				}{}
-				provider2.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module {
-						return provider2
-					}}
-				}
-				provider2.PDFEngineMock = func() (gotenberg.PDFEngine, error) {
-					return gotenberg.PDFEngineMock{}, nil
+				mod.LibreOfficeMock = func() (libreofficeapi.Uno, error) {
+					return nil, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
@@ -60,36 +57,24 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						provider1.Descriptor(),
-						provider2.Descriptor(),
+						mod.Descriptor(),
 					},
 				)
 			}(),
+			expectError: true,
 		},
 		{
-			name: "no UNO API provider",
-			ctx: gotenberg.NewContext(
-				gotenberg.ParsedFlags{
-					FlagSet: new(LibreOffice).Descriptor().FlagSet,
-				},
-				[]gotenberg.ModuleDescriptor{},
-			),
-			expectProvisionErr: true,
-		},
-		{
-			name: "no API from UNO API provider",
+			scenario: "no PDF engine provider",
 			ctx: func() *gotenberg.Context {
-				provider := struct {
+				mod := &struct {
 					gotenberg.ModuleMock
-					uno.ProviderMock
+					libreofficeapi.ProviderMock
 				}{}
-				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider
-					}}
+				mod.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod }}
 				}
-				provider.UNOMock = func() (uno.API, error) {
-					return uno.APIMock{}, errors.New("foo")
+				mod.LibreOfficeMock = func() (libreofficeapi.Uno, error) {
+					return new(libreofficeapi.ApiMock), nil
 				}
 
 				return gotenberg.NewContext(
@@ -97,26 +82,28 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
+						mod.Descriptor(),
 					},
 				)
 			}(),
-			expectProvisionErr: true,
+			expectError: true,
 		},
 		{
-			name: "no PDF engine provider",
+			scenario: "no PDF engine from PDF engine provider",
 			ctx: func() *gotenberg.Context {
-				provider := struct {
+				mod := &struct {
 					gotenberg.ModuleMock
-					uno.ProviderMock
+					libreofficeapi.ProviderMock
+					gotenberg.PdfEngineProviderMock
 				}{}
-				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider
-					}}
+				mod.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod }}
 				}
-				provider.UNOMock = func() (uno.API, error) {
-					return uno.APIMock{}, nil
+				mod.LibreOfficeMock = func() (libreofficeapi.Uno, error) {
+					return new(libreofficeapi.ApiMock), nil
+				}
+				mod.PdfEngineMock = func() (gotenberg.PdfEngine, error) {
+					return nil, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
@@ -124,39 +111,28 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
+						mod.Descriptor(),
 					},
 				)
 			}(),
-			expectProvisionErr: true,
+			expectError: true,
 		},
 		{
-			name: "no PDF engine from PDF engine provider",
+			scenario: "provision success",
 			ctx: func() *gotenberg.Context {
-				provider1 := struct {
+				mod := &struct {
 					gotenberg.ModuleMock
-					uno.ProviderMock
+					libreofficeapi.ProviderMock
+					gotenberg.PdfEngineProviderMock
 				}{}
-				provider1.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider1
-					}}
+				mod.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod }}
 				}
-				provider1.UNOMock = func() (uno.API, error) {
-					return uno.APIMock{}, nil
+				mod.LibreOfficeMock = func() (libreofficeapi.Uno, error) {
+					return new(libreofficeapi.ApiMock), nil
 				}
-
-				provider2 := struct {
-					gotenberg.ModuleMock
-					gotenberg.PDFEngineProviderMock
-				}{}
-				provider2.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module {
-						return provider2
-					}}
-				}
-				provider2.PDFEngineMock = func() (gotenberg.PDFEngine, error) {
-					return gotenberg.PDFEngineMock{}, errors.New("foo")
+				mod.PdfEngineMock = func() (gotenberg.PdfEngine, error) {
+					return new(gotenberg.PdfEngineMock), nil
 				}
 
 				return gotenberg.NewContext(
@@ -164,59 +140,56 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						provider1.Descriptor(),
-						provider2.Descriptor(),
+						mod.Descriptor(),
 					},
 				)
 			}(),
-			expectProvisionErr: true,
+			expectError: false,
 		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
 			mod := new(LibreOffice)
 			err := mod.Provision(tc.ctx)
 
-			if tc.expectProvisionErr && err == nil {
-				t.Error("expected mod.Provision() error, but got none")
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectProvisionErr && err != nil {
-				t.Errorf("expected no error from mod.Provision(), but got: %v", err)
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
 }
 
 func TestLibreOffice_Routes(t *testing.T) {
-	tests := []struct {
-		name              string
-		mod               LibreOffice
-		expectRoutesCount int
+	for _, tc := range []struct {
+		scenario      string
+		expectRoutes  int
+		disableRoutes bool
 	}{
 		{
-			name:              "route not disabled",
-			mod:               LibreOffice{},
-			expectRoutesCount: 1,
+			scenario:      "routes not disabled",
+			expectRoutes:  1,
+			disableRoutes: false,
 		},
 		{
-			name: "route disabled",
-			mod: LibreOffice{
-				disableRoutes: true,
-			},
+			scenario:      "routes disabled",
+			expectRoutes:  0,
+			disableRoutes: true,
 		},
-	}
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := new(LibreOffice)
+			mod.disableRoutes = tc.disableRoutes
 
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			routes, err := tc.mod.Routes()
+			routes, err := mod.Routes()
 			if err != nil {
-				t.Fatalf("expected no error from mod.Routes(), but got: %v", err)
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if tc.expectRoutesCount != len(routes) {
-				t.Errorf("expected %d routes from mod.Routes(), but got %d", tc.expectRoutesCount, len(routes))
+			if tc.expectRoutes != len(routes) {
+				t.Errorf("expected %d routes but got %d", tc.expectRoutes, len(routes))
 			}
 		})
 	}

pkg/modules/libreoffice/pdfengine/doc.go

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

pkg/modules/libreoffice/pdfengine/pdfengine.go

@@ -5,73 +5,85 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
 func init() {
-	gotenberg.MustRegisterModule(UNO{})
+	gotenberg.MustRegisterModule(new(LibreOfficePdfEngine))
 }
 
-// UNO interacts with the UNO (Universal Network Objects) API and implements
-// the gotenberg.PDFEngine interface.
-type UNO struct {
-	unoAPI uno.API
+// LibreOfficePdfEngine interacts with the LibreOffice (Universal Network Objects) API
+// and implements the [gotenberg.PdfEngine] interface.
+type LibreOfficePdfEngine struct {
+	unoApi api.Uno
 }
 
-// Descriptor returns a UNO's module descriptor.
-func (UNO) Descriptor() gotenberg.ModuleDescriptor {
+// Descriptor returns a [LibreOfficePdfEngine]'s module descriptor.
+func (engine *LibreOfficePdfEngine) Descriptor() gotenberg.ModuleDescriptor {
 	return gotenberg.ModuleDescriptor{
-		ID:  "uno-pdfengine",
-		New: func() gotenberg.Module { return new(UNO) },
+		ID:  "libreoffice-pdfengine",
+		New: func() gotenberg.Module { return new(LibreOfficePdfEngine) },
 	}
 }
 
 // Provision sets the module properties.
-func (engine *UNO) Provision(ctx *gotenberg.Context) error {
-	provider, err := ctx.Module(new(uno.Provider))
+func (engine *LibreOfficePdfEngine) Provision(ctx *gotenberg.Context) error {
+	provider, err := ctx.Module(new(api.Provider))
 	if err != nil {
-		return fmt.Errorf("get unoconv provider: %w", err)
+		return fmt.Errorf("get LibreOffice Uno provider: %w", err)
 	}
 
-	unoAPI, err := provider.(uno.Provider).UNO()
+	unoApi, err := provider.(api.Provider).LibreOffice()
 	if err != nil {
-		return fmt.Errorf("get unoconv API: %w", err)
+		return fmt.Errorf("get LibreOffice Uno: %w", err)
 	}
 
-	engine.unoAPI = unoAPI
+	engine.unoApi = unoApi
 
 	return nil
 }
 
-// Merge is not available for this PDF engine.
-func (engine UNO) Merge(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
-	return fmt.Errorf("merge PDFs with unoconv: %w", gotenberg.ErrPDFEngineMethodNotAvailable)
+// Merge is not available in this implementation.
+func (engine *LibreOfficePdfEngine) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+	return fmt.Errorf("merge PDFs with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
 }
 
 // Convert converts the given PDF to a specific PDF format. Currently, only the
-// PDF/A-1a, PDF/A-2b and PDF/A-3b formats are available. If another PDF format
-// is requested, it returns a gotenberg.ErrPDFFormatNotAvailable error.
-func (engine UNO) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-	err := engine.unoAPI.PDF(ctx, logger, inputPath, outputPath, uno.Options{
-		PDFformat: format,
+// 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,
 	})
 
 	if err == nil {
 		return nil
 	}
 
-	if errors.Is(err, uno.ErrInvalidPDFformat) {
-		return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, gotenberg.ErrPDFFormatNotAvailable)
+	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 '%s' with unoconv: %w", format, err)
+	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      = (*UNO)(nil)
-	_ gotenberg.Provisioner = (*UNO)(nil)
-	_ gotenberg.PDFEngine   = (*UNO)(nil)
+	_ gotenberg.Module      = (*LibreOfficePdfEngine)(nil)
+	_ gotenberg.Provisioner = (*LibreOfficePdfEngine)(nil)
+	_ gotenberg.PdfEngine   = (*LibreOfficePdfEngine)(nil)
 )

pkg/modules/libreoffice/pdfengine/pdfengine_test.go

@@ -6,169 +6,181 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v8/pkg/modules/libreoffice/api"
 )
 
-func TestUNO_Descriptor(t *testing.T) {
-	descriptor := UNO{}.Descriptor()
+func TestLibreOfficePdfEngine_Descriptor(t *testing.T) {
+	descriptor := new(LibreOfficePdfEngine).Descriptor()
 
 	actual := reflect.TypeOf(descriptor.New())
-	expect := reflect.TypeOf(new(UNO))
+	expect := reflect.TypeOf(new(LibreOfficePdfEngine))
 
 	if actual != expect {
 		t.Errorf("expected '%s' but got '%s'", expect, actual)
 	}
 }
 
-func TestUNO_Provider(t *testing.T) {
-	tests := []struct {
-		name               string
-		ctx                *gotenberg.Context
-		expectProvisionErr bool
+func TestLibreOfficePdfEngine_Provider(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		ctx         *gotenberg.Context
+		expectError bool
 	}{
 		{
-			name: "nominal behavior",
-			ctx: func() *gotenberg.Context {
-				provider := struct {
-					gotenberg.ModuleMock
-					uno.ProviderMock
-				}{}
-				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
-						return provider
-					}}
-				}
-				provider.UNOMock = func() (uno.API, error) {
-					return uno.APIMock{}, nil
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: new(UNO).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
-					},
-				)
-			}(),
-		},
-		{
-			name: "no UNO API provider",
+			scenario: "no LibreOffice API provider",
 			ctx: gotenberg.NewContext(
 				gotenberg.ParsedFlags{
-					FlagSet: new(UNO).Descriptor().FlagSet,
+					FlagSet: new(LibreOfficePdfEngine).Descriptor().FlagSet,
 				},
 				[]gotenberg.ModuleDescriptor{},
 			),
-			expectProvisionErr: true,
+			expectError: true,
 		},
 		{
-			name: "no API from UNO API provider",
+			scenario: "no API from LibreOffice API provider",
 			ctx: func() *gotenberg.Context {
-				provider := struct {
+				provider := &struct {
 					gotenberg.ModuleMock
-					uno.ProviderMock
+					api.ProviderMock
 				}{}
 				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
 						return provider
 					}}
 				}
-				provider.UNOMock = func() (uno.API, error) {
-					return uno.APIMock{}, errors.New("foo")
+				provider.LibreOfficeMock = func() (api.Uno, error) {
+					return nil, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
 					gotenberg.ParsedFlags{
-						FlagSet: new(UNO).Descriptor().FlagSet,
+						FlagSet: new(LibreOfficePdfEngine).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
 						provider.Descriptor(),
 					},
 				)
 			}(),
-			expectProvisionErr: true,
+			expectError: true,
 		},
-	}
+		{
+			scenario: "provision success",
+			ctx: func() *gotenberg.Context {
+				provider := &struct {
+					gotenberg.ModuleMock
+					api.ProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
+				}
+				provider.LibreOfficeMock = func() (api.Uno, error) {
+					return new(api.ApiMock), nil
+				}
 
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			mod := new(UNO)
-			err := mod.Provision(tc.ctx)
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: new(LibreOfficePdfEngine).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{
+						provider.Descriptor(),
+					},
+				)
+			}(),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(LibreOfficePdfEngine)
+			err := engine.Provision(tc.ctx)
 
-			if tc.expectProvisionErr && err == nil {
-				t.Error("expected mod.Provision() error, but got none")
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectProvisionErr && err != nil {
-				t.Errorf("expected no error from mod.Provision(), but got: %v", err)
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
 }
 
-func TestUNO_Merge(t *testing.T) {
-	mod := new(UNO)
-	err := mod.Merge(context.Background(), zap.NewNop(), nil, "")
+func TestLibreOfficePdfEngine_Merge(t *testing.T) {
+	engine := new(LibreOfficePdfEngine)
+	err := engine.Merge(context.Background(), zap.NewNop(), nil, "")
 
-	if !errors.Is(err, gotenberg.ErrPDFEngineMethodNotAvailable) {
-		t.Errorf("expected error %v from mod.Merge(), but got: %v", gotenberg.ErrPDFEngineMethodNotAvailable, err)
+	if !errors.Is(err, gotenberg.ErrPdfEngineMethodNotSupported) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPdfEngineMethodNotSupported, err)
 	}
 }
 
-func TestUNO_Convert(t *testing.T) {
-	tests := []struct {
-		name             string
-		mod              UNO
-		expectConvertErr bool
+func TestLibreOfficePdfEngine_Convert(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		api         api.Uno
+		expectError bool
 	}{
 		{
-			name: "nominal behavior",
-			mod: UNO{
-				unoAPI: uno.APIMock{
-					PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options uno.Options) error {
-						return nil
-					},
+			scenario: "convert success",
+			api: &api.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options api.Options) error {
+					return nil
 				},
 			},
+			expectError: false,
 		},
 		{
-			name: "invalid PDF format",
-			mod: UNO{
-				unoAPI: uno.APIMock{
-					PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options uno.Options) error {
-						return uno.ErrInvalidPDFformat
-					},
+			scenario: "invalid PDF format",
+			api: &api.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options api.Options) error {
+					return api.ErrInvalidPdfFormats
 				},
 			},
-			expectConvertErr: true,
+			expectError: true,
 		},
 		{
-			name: "convert fail",
-			mod: UNO{
-				unoAPI: uno.APIMock{
-					PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options uno.Options) error {
-						return errors.New("foo")
-					},
+			scenario: "convert fail",
+			api: &api.ApiMock{
+				PdfMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options api.Options) error {
+					return errors.New("foo")
 				},
 			},
-			expectConvertErr: true,
+			expectError: true,
 		},
-	}
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := &LibreOfficePdfEngine{unoApi: tc.api}
+			err := engine.Convert(context.Background(), zap.NewNop(), gotenberg.PdfFormats{}, "", "")
 
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			err := tc.mod.Convert(context.Background(), zap.NewNop(), "", "", "")
-
-			if tc.expectConvertErr && err == nil {
-				t.Errorf("expected mod.Convert() error, but got none")
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
 			}
 
-			if !tc.expectConvertErr && err != nil {
-				t.Fatalf("expected no error from mod.Convert(), but got: %v", err)
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
 			}
 		})
 	}
 }
+
+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

@@ -1,19 +1,21 @@
 package libreoffice
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	"github.com/labstack/echo/v4"
+
+	"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"
 )
 
-// convertRoute returns an api.Route which can convert LibreOffice documents
+// convertRoute returns an [api.Route] which can convert LibreOffice documents
 // to PDF.
-func convertRoute(unoAPI uno.API, engine gotenberg.PDFEngine) api.Route {
+func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) api.Route {
 	return api.Route{
 		Method:      http.MethodPost,
 		Path:        "/forms/libreoffice/convert",
@@ -23,78 +25,75 @@ func convertRoute(unoAPI uno.API, engine gotenberg.PDFEngine) api.Route {
 
 			// Let's get the data from the form and validate them.
 			var (
-				inputPaths         []string
-				landscape          bool
-				nativePageRanges   string
-				nativePDFA1aFormat bool
-				nativePDFformat    string
-				PDFformat          string
-				merge              bool
+				inputPaths       []string
+				landscape        bool
+				nativePageRanges string
+				exportFormFields bool
+				pdfa             string
+				pdfua            bool
+				nativePdfFormats bool
+				merge            bool
+				metadata         map[string]interface{}
 			)
 
 			err := ctx.FormData().
-				MandatoryPaths(unoAPI.Extensions(), &inputPaths).
+				MandatoryPaths(libreOffice.Extensions(), &inputPaths).
 				Bool("landscape", &landscape, false).
 				String("nativePageRanges", &nativePageRanges, "").
-				Bool("nativePdfA1aFormat", &nativePDFA1aFormat, false).
-				String("nativePdfFormat", &nativePDFformat, "").
-				String("pdfFormat", &PDFformat, "").
+				Bool("exportFormFields", &exportFormFields, true).
+				String("pdfa", &pdfa, "").
+				Bool("pdfua", &pdfua, false).
+				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
+				}).
 				Validate()
-
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			if nativePDFA1aFormat {
-				ctx.Log().Warn("'nativePdfA1aFormat' is deprecated; prefer 'nativePdfFormat' or 'pdfFormat' form fields instead")
-			}
-
-			if nativePDFA1aFormat && nativePDFformat != "" {
-				return api.WrapError(
-					errors.New("got both 'nativePdfFormat' and 'nativePdfA1aFormat' form fields"),
-					api.NewSentinelHTTPError(http.StatusBadRequest, "Both 'nativePdfFormat' and 'nativePdfA1aFormat' form fields are provided"),
-				)
-			}
-
-			if nativePDFA1aFormat && PDFformat != "" {
-				return api.WrapError(
-					errors.New("got both 'pdfFormat' and 'nativePdfA1aFormat' form fields"),
-					api.NewSentinelHTTPError(http.StatusBadRequest, "Both 'pdfFormat' and 'nativePdfA1aFormat' form fields are provided"),
-				)
-			}
-
-			if nativePDFformat != "" && PDFformat != "" {
-				return api.WrapError(
-					errors.New("got both 'pdfFormat' and 'nativePdfFormat' form fields"),
-					api.NewSentinelHTTPError(http.StatusBadRequest, "Both 'pdfFormat' and 'nativePdfFormat' form fields are provided"),
-				)
-			}
-
-			if nativePDFA1aFormat {
-				nativePDFformat = gotenberg.FormatPDFA1a
+			pdfFormats := gotenberg.PdfFormats{
+				PdfA:  pdfa,
+				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 := uno.Options{
-					Landscape:  landscape,
-					PageRanges: nativePageRanges,
-					PDFformat:  nativePDFformat,
+				options := libreofficeapi.Options{
+					Landscape:        landscape,
+					PageRanges:       nativePageRanges,
+					ExportFormFields: exportFormFields,
 				}
 
-				err = unoAPI.PDF(ctx, ctx.Log(), inputPath, outputPaths[i], options)
+				if nativePdfFormats {
+					options.PdfFormats = pdfFormats
+				}
 
+				err = libreOffice.Pdf(ctx, ctx.Log(), inputPath, outputPaths[i], options)
 				if err != nil {
-					if errors.Is(err, uno.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.ErrMalformedPageRanges) {
+						return api.WrapError(
+							fmt.Errorf("convert to PDF: %w", err),
+							api.NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("Malformed page ranges '%s' (nativePageRanges)", options.PageRanges)),
 						)
 					}
 
@@ -102,9 +101,7 @@ func convertRoute(unoAPI uno.API, engine gotenberg.PDFEngine) api.Route {
 				}
 			}
 
-			// 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.
-
+			// So far so good, let's check if we have to merge the PDFs.
 			if len(outputPaths) > 1 && merge {
 				outputPath := ctx.GeneratePath(".pdf")
 
@@ -113,85 +110,56 @@ func convertRoute(unoAPI uno.API, engine gotenberg.PDFEngine) api.Route {
 					return fmt.Errorf("merge PDFs: %w", err)
 				}
 
-				// Now, let's check if the client want to convert this result
-				// PDF to a specific PDF format.
-
-				// Note: nativePdfA1aFormat/nativePdfFormat have not been
-				// specified if PDFformat is not empty.
-
-				if PDFformat != "" {
-					convertInputPath := outputPath
-					convertOutputPath := ctx.GeneratePath(".pdf")
-
-					err = engine.Convert(ctx, ctx.Log(), PDFformat, convertInputPath, convertOutputPath)
-
-					if err != nil {
-						if errors.Is(err, gotenberg.ErrPDFFormatNotAvailable) {
-							return api.WrapError(
-								fmt.Errorf("convert PDF: %w", err),
-								api.NewSentinelHTTPError(
-									http.StatusBadRequest,
-									fmt.Sprintf("At least one PDF engine does not handle the PDF format '%s' (pdfFormat), while other have failed to convert for other reasons", PDFformat),
-								),
-							)
-						}
-
-						return fmt.Errorf("convert PDF: %w", err)
-					}
-
-					// 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 API is able to send it as a response to the client.
-
-				err = ctx.AddOutputPaths(outputPath)
-				if err != nil {
-					return fmt.Errorf("add output path: %w", err)
-				}
-
-				return nil
+				// Only one output path.
+				outputPaths = []string{outputPath}
 			}
 
-			// 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.
-
-			// Note: nativePdfA1aFormat/nativePdfFormat have not been
-			// specified if PDFformat is not empty.
-
-			if PDFformat != "" {
+			// Let's check if the client want to convert each PDF to a specific
+			// PDF format.
+			zeroValued := gotenberg.PdfFormats{}
+			if !nativePdfFormats && pdfFormats != zeroValued {
 				convertOutputPaths := make([]string, len(outputPaths))
 
 				for i, outputPath := range outputPaths {
 					convertInputPath := outputPath
 					convertOutputPaths[i] = ctx.GeneratePath(".pdf")
 
-					err = engine.Convert(ctx, ctx.Log(), PDFformat, convertInputPath, convertOutputPaths[i])
-
+					err = engine.Convert(ctx, ctx.Log(), pdfFormats, convertInputPath, convertOutputPaths[i])
 					if err != nil {
-						if errors.Is(err, gotenberg.ErrPDFFormatNotAvailable) {
-							return api.WrapError(
-								fmt.Errorf("convert PDF: %w", err),
-								api.NewSentinelHTTPError(
-									http.StatusBadRequest,
-									fmt.Sprintf("At least one PDF engine does not handle the PDF format '%s' (pdfFormat), while other have failed to convert for other reasons", PDFformat),
-								),
-							)
-						}
-
 						return fmt.Errorf("convert PDF: %w", err)
 					}
-
 				}
 
 				// Important: the output paths are now the converted files.
 				outputPaths = convertOutputPaths
 			}
 
+			// Writes and potentially overrides metadata entries, if any.
+			if len(metadata) > 0 {
+				for _, outputPath := range outputPaths {
+					err = engine.WriteMetadata(ctx, ctx.Log(), metadata, outputPath)
+					if err != nil {
+						return fmt.Errorf("write metadata: %w", err)
+					}
+				}
+			}
+
+			if len(outputPaths) > 1 {
+				// 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
+				}
+			}
+
 			// 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.
-
 			err = ctx.AddOutputPaths(outputPaths...)
 			if err != nil {
 				return fmt.Errorf("add output paths: %w", err)

pkg/modules/libreoffice/uno/doc.go

@@ -1,3 +0,0 @@
-// Package uno provides a module which interacts with the UNO
-// (Universal Network Objects) API.
-package uno

pkg/modules/libreoffice/uno/listener.go

@@ -1,379 +0,0 @@
-package uno
-
-import (
-	"context"
-	"fmt"
-	"net"
-	"os"
-	"sync"
-	"time"
-
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"go.uber.org/zap"
-)
-
-type listener interface {
-	start(logger *zap.Logger) error
-	stop(logger *zap.Logger) error
-	restart(logger *zap.Logger) error
-	lock(ctx context.Context, logger *zap.Logger) error
-	unlock(logger *zap.Logger) error
-	port() int
-	queue() int
-	healthy() bool
-}
-
-// TODO: this implementation, even if it's working, is way too complex.
-type libreOfficeListener struct {
-	binPath      string
-	startTimeout time.Duration
-	threshold    int
-
-	socketPort         int
-	userProfileDirPath string
-	cmd                gotenberg.Cmd
-	cfgMu              sync.RWMutex
-
-	usage           int
-	hadFirstStart   bool
-	hadFirstStartMu sync.RWMutex
-	restarting      bool
-	restartingMu    sync.RWMutex
-	queueLength     int
-	queueLengthMu   sync.RWMutex
-	lockChan        chan struct{}
-	logger          *zap.Logger
-}
-
-func newLibreOfficeListener(logger *zap.Logger, binPath string, startTimeout time.Duration, threshold int) listener {
-	return &libreOfficeListener{
-		binPath:      binPath,
-		startTimeout: startTimeout,
-		threshold:    threshold,
-		lockChan:     make(chan struct{}, 1),
-		logger:       logger.Named("listener"),
-	}
-}
-
-func (listener *libreOfficeListener) start(logger *zap.Logger) error {
-	listener.hadFirstStartMu.Lock()
-	listener.hadFirstStart = true
-	listener.hadFirstStartMu.Unlock()
-
-	port, err := freePort(logger)
-	if err != nil {
-		return fmt.Errorf("get free port: %w", err)
-	}
-
-	// Good to know: the garbage collector might delete the next directory
-	// while it is still running. It does seem to cause any issue though.
-	userProfileDirPath := gotenberg.NewDirPath()
-
-	args := []string{
-		"--headless",
-		"--invisible",
-		"--nocrashreport",
-		"--nodefault",
-		"--nologo",
-		"--nofirststartwizard",
-		"--norestore",
-		fmt.Sprintf("-env:UserInstallation=file://%s", userProfileDirPath),
-		fmt.Sprintf("--accept=socket,host=127.0.0.1,port=%d,tcpNoDelay=1;urp;StarOffice.ComponentContext", port),
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), listener.startTimeout)
-	defer cancel()
-
-	cmd, err := gotenberg.CommandContext(ctx, logger, listener.binPath, args...)
-	if err != nil {
-		return fmt.Errorf("create LibreOffice listener command: %w", err)
-	}
-
-	// For whatever reason, LibreOffice requires a first start before being
-	// able to run as a daemon.
-	exitCode, err := cmd.Exec()
-	if err != nil && exitCode != 81 {
-		return fmt.Errorf("execute LibreOffice listener: %w", err)
-	}
-
-	logger.Debug("got exit code 81, e.g., LibreOffice listener first start")
-
-	// Second start (daemon).
-	cmd = gotenberg.Command(logger, listener.binPath, args...)
-
-	err = cmd.Start()
-	if err != nil {
-		return fmt.Errorf("start LibreOffice listener: %w", err)
-	}
-
-	waitChan := make(chan error, 1)
-
-	go func() {
-		// By waiting the process, we avoid the creation of a zombie process
-		// and make sure we catch an early exit if any.
-		waitChan <- cmd.Wait()
-	}()
-
-	connChan := make(chan error, 1)
-
-	go func() {
-		// As the LibreOffice socket may take some time to be available, we
-		// have to ensure that it is indeed accepting connections.
-		for {
-			if ctx.Err() != nil {
-				connChan <- ctx.Err()
-				break
-			}
-
-			conn, err := net.DialTimeout("tcp", fmt.Sprintf("127.0.0.1:%d", port), time.Duration(1)*time.Second)
-			if err != nil {
-				continue
-			}
-
-			connChan <- nil
-			err = conn.Close()
-			if err != nil {
-				logger.Debug(fmt.Sprintf("close connection after health checking the LibreOffice listener: %v", err))
-			}
-
-			break
-		}
-	}()
-
-	var success bool
-
-	defer func() {
-		if success {
-			listener.cfgMu.Lock()
-			listener.socketPort = port
-			listener.userProfileDirPath = userProfileDirPath
-			listener.cmd = cmd
-			listener.cfgMu.Unlock()
-
-			return
-		}
-
-		// Let's make sure the process is killed.
-		err = cmd.Kill()
-		if err != nil {
-			logger.Debug(fmt.Sprintf("kill LibreOffice listener process: %v", err))
-		}
-	}()
-
-	logger.Debug("waiting for the LibreOffice listener socket to be available...")
-
-	for {
-		select {
-		case err = <-connChan:
-			if err != nil {
-				return fmt.Errorf("LibreOffice listener socket not available: %w", err)
-			}
-
-			logger.Debug("LibreOffice listener socket available")
-			success = true
-
-			return nil
-		case err = <-waitChan:
-			return fmt.Errorf("LibreOffice listener process exited: %w", err)
-		}
-	}
-}
-
-func (listener *libreOfficeListener) stop(logger *zap.Logger) error {
-	listener.cfgMu.RLock()
-
-	defer func() {
-		defer listener.cfgMu.RUnlock()
-
-		err := os.RemoveAll(listener.userProfileDirPath)
-		if err != nil {
-			logger.Error(fmt.Sprintf("remove LibreOffice listener user profile directory: %v", err))
-		}
-	}()
-
-	err := listener.cmd.Kill()
-	if err != nil {
-		return fmt.Errorf("kill LibreOffice listener process: %w", err)
-	}
-
-	return nil
-}
-
-func (listener *libreOfficeListener) restart(logger *zap.Logger) error {
-	listener.restartingMu.Lock()
-	listener.restarting = true
-	listener.restartingMu.Unlock()
-
-	defer func() {
-		listener.restartingMu.Lock()
-		listener.restarting = false
-		listener.restartingMu.Unlock()
-	}()
-
-	err := listener.stop(logger)
-	if err != nil {
-		return fmt.Errorf("stop LibreOffice listener: %w", err)
-	}
-
-	err = listener.start(logger)
-	if err != nil {
-		return fmt.Errorf("start LibreOffice listener: %w", err)
-	}
-
-	listener.usage = 0
-
-	return nil
-}
-
-func (listener *libreOfficeListener) lock(ctx context.Context, logger *zap.Logger) error {
-	listener.queueLengthMu.Lock()
-	listener.queueLength += 1
-	listener.queueLengthMu.Unlock()
-
-	defer func() {
-		listener.queueLengthMu.Lock()
-		listener.queueLength -= 1
-		listener.queueLengthMu.Unlock()
-	}()
-
-	doWithContext := func(ctx context.Context, do func() error) error {
-		doChan := make(chan error, 1)
-
-		go func() {
-			doChan <- do()
-		}()
-
-		for {
-			select {
-			case err := <-doChan:
-				return err
-			case <-ctx.Done():
-				return ctx.Err()
-			}
-		}
-	}
-
-	select {
-	case listener.lockChan <- struct{}{}:
-		logger.Debug("LibreOffice listener lock acquired")
-
-		listener.hadFirstStartMu.RLock()
-
-		if !listener.hadFirstStart {
-			listener.hadFirstStartMu.RUnlock()
-
-			logger.Debug("starting LibreOffice listener...")
-
-			err := doWithContext(ctx, func() error {
-				return listener.start(logger)
-			})
-
-			if err == nil {
-				return nil
-			}
-
-			return fmt.Errorf("start long-running LibreOffice listener: %w", err)
-		}
-
-		listener.hadFirstStartMu.RUnlock()
-
-		if !listener.healthy() {
-			logger.Debug("LibreOffice listener is unhealthy, restarting it...")
-
-			err := doWithContext(ctx, func() error {
-				return listener.restart(logger)
-			})
-
-			if err == nil {
-				return nil
-			}
-
-			return fmt.Errorf("restart long-running LibreOffice listener: %w", err)
-		}
-
-		return nil
-	case <-ctx.Done():
-		logger.Debug("failed to acquire LibreOffice listener lock before deadline")
-
-		return fmt.Errorf("acquire LibreOffice listener lock: %w", ctx.Err())
-	}
-}
-
-func (listener *libreOfficeListener) unlock(logger *zap.Logger) error {
-	defer func() {
-		<-listener.lockChan
-		logger.Debug("LibreOffice listener lock released")
-	}()
-
-	if !listener.healthy() {
-		logger.Debug("LibreOffice listener is unhealthy, restarting it...")
-
-		err := listener.restart(logger)
-		if err == nil {
-			return nil
-		}
-
-		return fmt.Errorf("restart LibreOffice listener: %w", err)
-	}
-
-	listener.usage += 1
-	if listener.usage < listener.threshold {
-		return nil
-	}
-
-	logger.Debug("LibreOffice listener threshold reached, restarting it...")
-
-	err := listener.restart(logger)
-	if err == nil {
-		return nil
-	}
-
-	return fmt.Errorf("restart LibreOffice listener: %w", err)
-}
-
-func (listener *libreOfficeListener) port() int {
-	listener.cfgMu.RLock()
-	defer listener.cfgMu.RUnlock()
-
-	return listener.socketPort
-}
-
-func (listener *libreOfficeListener) queue() int {
-	listener.queueLengthMu.RLock()
-	defer listener.queueLengthMu.RUnlock()
-
-	return listener.queueLength
-}
-
-func (listener *libreOfficeListener) healthy() bool {
-	listener.hadFirstStartMu.RLock()
-	defer listener.hadFirstStartMu.RUnlock()
-
-	if !listener.hadFirstStart {
-		return true
-	}
-
-	listener.restartingMu.RLock()
-	defer listener.restartingMu.RUnlock()
-
-	if listener.restarting {
-		return true
-	}
-
-	conn, err := net.DialTimeout("tcp", fmt.Sprintf("127.0.0.1:%d", listener.port()), time.Duration(1)*time.Second)
-	if err == nil {
-		err := conn.Close()
-		if err != nil {
-			listener.logger.Debug(fmt.Sprintf("close connection after health checking the LibreOffice listener: %v", err))
-		}
-
-		return true
-	}
-
-	return false
-}
-
-// Interface guards.
-var (
-	_ listener = (*libreOfficeListener)(nil)
-)

pkg/modules/libreoffice/uno/listener_test.go

@@ -1,431 +0,0 @@
-package uno
-
-import (
-	"context"
-	"os"
-	"testing"
-	"time"
-
-	"go.uber.org/zap"
-)
-
-func TestListener_start(t *testing.T) {
-	tests := []struct {
-		name           string
-		listener       listener
-		expectStartErr bool
-	}{
-		{
-			name:     "nominal behavior",
-			listener: newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10),
-		},
-		{
-			name:           "non-exit code 81 on first start",
-			listener:       newLibreOfficeListener(zap.NewNop(), "foo", time.Duration(10)*time.Second, 10),
-			expectStartErr: true,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			err := tc.listener.start(zap.NewNop())
-
-			if tc.expectStartErr && err == nil {
-				t.Fatalf("expected listener.start() error, but got none")
-			}
-
-			if !tc.expectStartErr && err != nil {
-				t.Fatalf("expected no error from listener.start(), but got: %v", err)
-			}
-
-			if err != nil {
-				if tc.listener.healthy() {
-					t.Error("expected a non-running LibreOffice listener")
-				}
-
-				return
-			}
-
-			err = tc.listener.stop(zap.NewNop())
-			if err != nil {
-				t.Fatalf("expected no error from listener.stop(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestListener_stop(t *testing.T) {
-	listener := newLibreOfficeListener(
-		zap.NewNop(),
-		os.Getenv("LIBREOFFICE_BIN_PATH"),
-		time.Duration(10)*time.Second,
-		10,
-	)
-
-	err := listener.start(zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.start(), but got: %v", err)
-	}
-
-	err = listener.stop(zap.NewNop())
-	if err != nil {
-		t.Errorf("expected no error from listener.stop(), but got: %v", err)
-	}
-}
-
-func TestListener_restart(t *testing.T) {
-	listener := newLibreOfficeListener(
-		zap.NewNop(),
-		os.Getenv("LIBREOFFICE_BIN_PATH"),
-		time.Duration(10)*time.Second,
-		10,
-	)
-
-	err := listener.start(zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.start(), but got: %v", err)
-	}
-
-	err = listener.restart(zap.NewNop())
-	if err != nil {
-		t.Errorf("expected no error from listener.stop(), but got: %v", err)
-	}
-
-	if !listener.healthy() {
-		t.Error("expected an healthy LibreOffice listener")
-	}
-}
-
-func TestListener_lock(t *testing.T) {
-	tests := []struct {
-		name          string
-		listener      listener
-		ctx           context.Context
-		teardown      func(listener listener) error
-		expectLockErr bool
-	}{
-		{
-			name: "nominal behavior",
-			listener: func() listener {
-				listener := newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10)
-
-				err := listener.start(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.start(), but got: %v", err)
-				}
-
-				return listener
-			}(),
-			ctx: context.Background(),
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-		{
-			name:     "first start",
-			listener: newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10),
-			ctx:      context.Background(),
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-		{
-			name: "unhealthy listener",
-			listener: func() listener {
-				listener := newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10)
-
-				err := listener.start(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.start(), but got: %v", err)
-				}
-
-				err = listener.stop(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.stop(), but got: %v", err)
-				}
-
-				return listener
-			}(),
-			ctx: context.Background(),
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-		{
-			name: "context done",
-			listener: func() listener {
-				listener := newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10)
-
-				err := listener.start(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.start(), but got: %v", err)
-				}
-
-				err = listener.lock(context.Background(), zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.lock(), but got: %v", err)
-				}
-
-				return listener
-			}(),
-			ctx: func() context.Context {
-				ctx, cancel := context.WithCancel(context.Background())
-				cancel()
-
-				return ctx
-			}(),
-			expectLockErr: true,
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			defer func() {
-				err := tc.teardown(tc.listener)
-				if err != nil {
-					t.Errorf("expected no error from tc.teardown(), but got: %v", err)
-				}
-			}()
-
-			err := tc.listener.lock(tc.ctx, zap.NewNop())
-
-			if tc.expectLockErr && err == nil {
-				t.Fatalf("expected listener.lock() error, but got none")
-			}
-
-			if !tc.expectLockErr && err != nil {
-				t.Fatalf("expected no error from listener.lock(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestListener_unlock(t *testing.T) {
-	tests := []struct {
-		name     string
-		listener listener
-		teardown func(listener listener) error
-	}{
-		{
-			name: "nominal behavior",
-			listener: func() listener {
-				listener := newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10)
-
-				err := listener.start(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.start(), but got: %v", err)
-				}
-
-				err = listener.lock(context.Background(), zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.lock(), but got: %v", err)
-				}
-
-				return listener
-			}(),
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-		{
-			name: "unhealthy listener",
-			listener: func() listener {
-				listener := newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 10)
-
-				err := listener.start(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.start(), but got: %v", err)
-				}
-
-				err = listener.lock(context.Background(), zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.lock(), but got: %v", err)
-				}
-
-				err = listener.stop(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.stop(), but got: %v", err)
-				}
-
-				return listener
-			}(),
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-		{
-			name: "threshold reached",
-			listener: func() listener {
-				listener := newLibreOfficeListener(zap.NewNop(), os.Getenv("LIBREOFFICE_BIN_PATH"), time.Duration(10)*time.Second, 1)
-
-				err := listener.start(zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.start(), but got: %v", err)
-				}
-
-				err = listener.lock(context.Background(), zap.NewNop())
-				if err != nil {
-					t.Fatalf("expected no error from listener.lock(), but got: %v", err)
-				}
-
-				return listener
-			}(),
-			teardown: func(listener listener) error {
-				return listener.stop(zap.NewNop())
-			},
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			defer func() {
-				err := tc.teardown(tc.listener)
-				if err != nil {
-					t.Errorf("expected no error from tc.teardown(), but got: %v", err)
-				}
-			}()
-
-			err := tc.listener.unlock(zap.NewNop())
-			if err != nil {
-				t.Errorf("expected no error from listener.unlock(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestListener_port(t *testing.T) {
-	listener := newLibreOfficeListener(
-		zap.NewNop(),
-		os.Getenv("LIBREOFFICE_BIN_PATH"),
-		time.Duration(10)*time.Second,
-		10,
-	)
-
-	err := listener.start(zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.start(), but got: %v", err)
-	}
-
-	port := listener.port()
-	if port == 0 {
-		t.Error("expected a non-zero value from listener.port")
-	}
-
-	err = listener.stop(zap.NewNop())
-	if err != nil {
-		t.Errorf("expected no error from listener.stop(), but got: %v", err)
-	}
-}
-
-func TestListener_queue(t *testing.T) {
-	listener := newLibreOfficeListener(
-		zap.NewNop(),
-		os.Getenv("LIBREOFFICE_BIN_PATH"),
-		time.Duration(10)*time.Second,
-		10,
-	)
-
-	err := listener.start(zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.start(), but got: %v", err)
-	}
-
-	defer func() {
-		err := listener.stop(zap.NewNop())
-		if err != nil {
-			t.Errorf("expected no error from listener.stop(), but got: %v", err)
-		}
-	}()
-
-	queueLength := listener.queue()
-	if queueLength != 0 {
-		t.Fatalf("expected a zero value from listener.queue(), but got %d", queueLength)
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(10)*time.Second)
-
-	err = listener.lock(ctx, zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.lock(), but got: %v", err)
-	}
-
-	queueLength = listener.queue()
-	if queueLength != 0 {
-		t.Fatalf("expected a zero value from listener.queue(), but got %d", queueLength)
-	}
-
-	go func() {
-		_ = listener.lock(ctx, zap.NewNop())
-	}()
-
-	time.Sleep(time.Duration(100) * time.Millisecond)
-
-	queueLength = listener.queue()
-	if queueLength != 1 {
-		t.Fatalf("expected 1 from listener.queue(), but got %d", queueLength)
-	}
-
-	go func() {
-		_ = listener.lock(ctx, zap.NewNop())
-	}()
-
-	time.Sleep(time.Duration(100) * time.Millisecond)
-
-	queueLength = listener.queue()
-	if queueLength != 2 {
-		t.Fatalf("expected 2 from listener.queue(), but got %d", queueLength)
-	}
-
-	cancel()
-
-	time.Sleep(time.Duration(100) * time.Millisecond)
-
-	queueLength = listener.queue()
-	if queueLength != 0 {
-		t.Fatalf("expected a zero value from listener.queue(), but got %d", queueLength)
-	}
-}
-
-func TestListener_healthy(t *testing.T) {
-	listener := &libreOfficeListener{
-		binPath:      os.Getenv("LIBREOFFICE_BIN_PATH"),
-		startTimeout: time.Duration(10) * time.Second,
-		threshold:    10,
-		lockChan:     make(chan struct{}, 1),
-		logger:       zap.NewNop(),
-	}
-
-	// i.e., first start.
-	if !listener.healthy() {
-		t.Error("expected an healthy LibreOffice listener")
-	}
-
-	err := listener.start(zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.start(), but got: %v", err)
-	}
-
-	if !listener.healthy() {
-		t.Error("expected an healthy LibreOffice listener")
-	}
-
-	err = listener.stop(zap.NewNop())
-	if err != nil {
-		t.Fatalf("expected no error from listener.stop(), but got: %v", err)
-	}
-
-	time.Sleep(time.Duration(1) * time.Second)
-
-	if listener.healthy() {
-		t.Errorf("expected a non-healthy LibreOffice listener")
-	}
-
-	listener.restarting = true
-
-	if !listener.healthy() {
-		t.Error("expected an healthy LibreOffice listener")
-	}
-}

pkg/modules/libreoffice/uno/mocks.go

@@ -1,36 +0,0 @@
-package uno
-
-import (
-	"context"
-
-	"go.uber.org/zap"
-)
-
-// APIMock is a mock for the API interface.
-type APIMock struct {
-	PDFMock        func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error
-	ExtensionsMock func() []string
-}
-
-func (api APIMock) PDF(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-	return api.PDFMock(ctx, logger, inputPath, outputPath, options)
-}
-
-func (api APIMock) Extensions() []string {
-	return api.ExtensionsMock()
-}
-
-// ProviderMock is a mock for the Provider interface.
-type ProviderMock struct {
-	UNOMock func() (API, error)
-}
-
-func (provider ProviderMock) UNO() (API, error) {
-	return provider.UNOMock()
-}
-
-// Interface guards.
-var (
-	_ API      = (*APIMock)(nil)
-	_ Provider = (*ProviderMock)(nil)
-)

pkg/modules/libreoffice/uno/mocks_test.go

@@ -1,42 +0,0 @@
-package uno
-
-import (
-	"context"
-	"testing"
-
-	"go.uber.org/zap"
-)
-
-func TestAPIMock(t *testing.T) {
-	mock := APIMock{
-		PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-			return nil
-		},
-		ExtensionsMock: func() []string {
-			return nil
-		},
-	}
-
-	err := mock.PDF(context.Background(), zap.NewNop(), "", "", Options{})
-	if err != nil {
-		t.Errorf("expected no error from mock.PDF(), but got: %v", err)
-	}
-
-	ext := mock.Extensions()
-	if ext != nil {
-		t.Errorf("expected no extensions from mock.Extensions(), but got: %+v", ext)
-	}
-}
-
-func TestProviderMock(t *testing.T) {
-	mock := ProviderMock{
-		UNOMock: func() (API, error) {
-			return APIMock{}, nil
-		},
-	}
-
-	_, err := mock.UNO()
-	if err != nil {
-		t.Errorf("expected no error from mock.UNO(), but got: %v", err)
-	}
-}

pkg/modules/libreoffice/uno/uno.go

@@ -1,515 +0,0 @@
-package uno
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"os"
-	"sync"
-	"time"
-
-	"github.com/alexliesenfeld/health"
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	flag "github.com/spf13/pflag"
-	"go.uber.org/multierr"
-	"go.uber.org/zap"
-)
-
-func init() {
-	gotenberg.MustRegisterModule(UNO{})
-}
-
-var (
-	// ErrInvalidPDFformat happens if the PDF format option cannot be handled
-	// by LibreOffice.
-	ErrInvalidPDFformat = errors.New("invalid PDF format")
-
-	// ErrMalformedPageRanges happens if the page ranges option cannot be
-	// interpreted by LibreOffice.
-	ErrMalformedPageRanges = errors.New("page ranges are malformed")
-)
-
-// UNO is a module which provides an API to interact with LibreOffice.
-type UNO struct {
-	unoconvBinPath              string
-	libreOfficeBinPath          string
-	libreOfficeStartTimeout     time.Duration
-	libreOfficeRestartThreshold int
-
-	listener listener
-	logger   *zap.Logger
-}
-
-// Options gathers available options when converting a document to PDF.
-type Options struct {
-	// 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
-
-	// PDFformat allows to convert the resulting PDF to PDF/A-1a, PDF/A-2b, or
-	// PDF/A-3b.
-	// Optional.
-	PDFformat string
-}
-
-// API is an abstraction on top of uno.
-type API interface {
-	PDF(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error
-	Extensions() []string
-}
-
-// Provider is a module interface which exposes a method for creating an API
-// for other modules.
-//
-//	func (m *YourModule) Provision(ctx *gotenberg.Context) error {
-//		provider, _ := ctx.Module(new(uno.Provider))
-//		unoAPI, _      := provider.(uno.Provider).UNO()
-//	}
-type Provider interface {
-	UNO() (API, error)
-}
-
-// Descriptor returns a UNO's module descriptor.
-func (UNO) Descriptor() gotenberg.ModuleDescriptor {
-	return gotenberg.ModuleDescriptor{
-		ID: "uno",
-		FlagSet: func() *flag.FlagSet {
-			fs := flag.NewFlagSet("uno", flag.ExitOnError)
-			fs.Duration("uno-listener-start-timeout", time.Duration(10)*time.Second, "Time limit for restarting the LibreOffice listener")
-			fs.Int("uno-listener-restart-threshold", 10, "Conversions limit after which the LibreOffice listener is restarted - 0 means no long-running LibreOffice listener")
-			fs.Bool("unoconv-disable-listener", false, "Do not start a long-running listener - save resources in detriment of unitary performance")
-
-			err := fs.MarkDeprecated("unoconv-disable-listener", "use uno-listener-restart-threshold with 0 instead")
-			if err != nil {
-				panic(fmt.Errorf("create deprecated flags for the uno module: %v", err))
-			}
-
-			return fs
-		}(),
-		New: func() gotenberg.Module { return new(UNO) },
-	}
-}
-
-// Provision sets the module properties. It returns an error if the environment
-// variables UNOCONV_BIN_PATH and LIBREOFFICE_BIN_PATH are not set.
-func (mod *UNO) Provision(ctx *gotenberg.Context) error {
-	flags := ctx.ParsedFlags()
-	mod.libreOfficeStartTimeout = flags.MustDuration("uno-listener-start-timeout")
-	mod.libreOfficeRestartThreshold = flags.MustInt("uno-listener-restart-threshold")
-
-	disableListener := flags.MustBool("unoconv-disable-listener")
-	if disableListener {
-		mod.libreOfficeRestartThreshold = 0
-	}
-
-	unoconvBinPath, ok := os.LookupEnv("UNOCONV_BIN_PATH")
-	if !ok {
-		return errors.New("UNOCONV_BIN_PATH environment variable is not set")
-	}
-
-	mod.unoconvBinPath = unoconvBinPath
-
-	libreOfficeBinPath, ok := os.LookupEnv("LIBREOFFICE_BIN_PATH")
-	if !ok {
-		return errors.New("LIBREOFFICE_BIN_PATH environment variable is not set")
-	}
-
-	mod.libreOfficeBinPath = libreOfficeBinPath
-
-	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)
-	}
-
-	mod.logger = logger
-
-	mod.listener = newLibreOfficeListener(
-		mod.logger,
-		mod.libreOfficeBinPath,
-		mod.libreOfficeStartTimeout,
-		mod.libreOfficeRestartThreshold,
-	)
-
-	return nil
-}
-
-// Validate validates the module properties.
-func (mod UNO) Validate() error {
-	var err error
-
-	_, statErr := os.Stat(mod.unoconvBinPath)
-	if os.IsNotExist(statErr) {
-		err = multierr.Append(err, fmt.Errorf("unoconv binary path does not exist: %w", statErr))
-	}
-
-	_, statErr = os.Stat(mod.libreOfficeBinPath)
-	if os.IsNotExist(statErr) {
-		err = multierr.Append(err, fmt.Errorf("LibreOffice binary path does not exist: %w", statErr))
-	}
-
-	return err
-}
-
-// Start does nothing: it is here to validate the contract from the
-// gotenberg.App interface. The long-running LibreOffice Listener will be
-// started on the first call to PDF.
-func (mod UNO) Start() error {
-	return nil
-}
-
-// StartupMessage returns a custom startup message.
-func (mod UNO) StartupMessage() string {
-	if mod.libreOfficeRestartThreshold == 0 {
-		return "long-running LibreOffice listener disabled"
-	}
-
-	return "long-running LibreOffice listener ready to start"
-}
-
-// Stop stops the long-running LibreOffice Listener if it exists.
-func (mod UNO) Stop(ctx context.Context) error {
-	if mod.libreOfficeRestartThreshold == 0 {
-		return nil
-	}
-
-	// Block until the context is done so that other module may gracefully stop
-	// before we do a shutdown cleanup.
-	mod.logger.Debug("wait for the end of grace duration")
-
-	<-ctx.Done()
-
-	err := mod.listener.stop(mod.logger)
-	if err == nil {
-		return nil
-	}
-
-	return fmt.Errorf("stop long-running LibreOffice listener")
-}
-
-// Metrics returns the metrics.
-func (mod UNO) Metrics() ([]gotenberg.Metric, error) {
-	return []gotenberg.Metric{
-		{
-			Name:        "unoconv_active_instances_count",
-			Description: "Current number of active unoconv instances.",
-			Read: func() float64 {
-				activeInstancesCountMu.RLock()
-				defer activeInstancesCountMu.RUnlock()
-
-				return activeInstancesCount
-			},
-		},
-		{
-			Name:        "libreoffice_listener_active_instances_count",
-			Description: "Current number of active LibreOffice listener instances.",
-			Read: func() float64 {
-				if mod.libreOfficeRestartThreshold == 0 {
-					listenerActiveInstancesCountMu.RLock()
-					defer listenerActiveInstancesCountMu.RUnlock()
-
-					return listenerActiveInstancesCount
-				}
-
-				if mod.listener.healthy() {
-					return 1
-				}
-
-				return 0
-			},
-		},
-		{
-			Name:        "unoconv_listener_active_instances_count",
-			Description: "Current number of active unoconv listener instances - deprecated, prefer libreoffice_listener_active_instances_count.",
-			Read: func() float64 {
-				if mod.libreOfficeRestartThreshold == 0 {
-					listenerActiveInstancesCountMu.RLock()
-					defer listenerActiveInstancesCountMu.RUnlock()
-
-					return listenerActiveInstancesCount
-				}
-
-				if mod.listener.healthy() {
-					return 1
-				}
-
-				return 0
-			},
-		},
-		{
-			Name:        "libreoffice_listener_queue_length",
-			Description: "Current number of processes in the LibreOffice listener queue.",
-			Read: func() float64 {
-				return float64(mod.listener.queue())
-			},
-		},
-		{
-			Name:        "unoconv_listener_queue_length",
-			Description: "Current number of processes in the queue - deprecated, prefer libreoffice_listener_queue_length.",
-			Read: func() float64 {
-				return float64(mod.listener.queue())
-			},
-		},
-	}, nil
-}
-
-// Checks adds a health check that verifies the health of the long-running
-// LibreOffice listener.
-func (mod UNO) Checks() ([]health.CheckerOption, error) {
-	if mod.libreOfficeRestartThreshold == 0 {
-		return nil, nil
-	}
-
-	return []health.CheckerOption{
-		health.WithCheck(health.Check{
-			Name: "uno",
-			Check: func(_ context.Context) error {
-				if mod.listener.healthy() {
-					return nil
-				}
-
-				return errors.New("long-running LibreOffice listener unhealthy")
-			},
-		}),
-	}, nil
-}
-
-// PDF converts a document to PDF.
-//
-// If there is no long-running LibreOffice listener, it creates a dedicated
-// LibreOffice instance for the conversion. Substantial calls to this method
-// may increase CPU and memory usage drastically
-//
-// If there is a long-running LibreOffice listener, the conversion performance
-// improves substantially. However, it cannot perform parallel operations.
-func (mod UNO) PDF(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-	args := []string{
-		"--no-launch",
-		"--format",
-		"pdf",
-	}
-
-	switch mod.libreOfficeRestartThreshold {
-	case 0:
-		listener := newLibreOfficeListener(logger, mod.libreOfficeBinPath, mod.libreOfficeStartTimeout, 0)
-
-		err := listener.start(logger)
-		if err != nil {
-			return fmt.Errorf("start LibreOffice listener: %w", err)
-		}
-
-		defer func() {
-			err := listener.stop(logger)
-			if err != nil {
-				logger.Error(fmt.Sprintf("stop LibreOffice listener: %v", err))
-			}
-		}()
-
-		args = append(args, "--port", fmt.Sprintf("%d", listener.port()))
-	default:
-		err := mod.listener.lock(ctx, logger)
-		if err != nil {
-			return fmt.Errorf("lock long-running LibreOffice listener: %w", err)
-		}
-
-		defer func() {
-			go func() {
-				err := mod.listener.unlock(logger)
-				if err != nil {
-					mod.logger.Error(fmt.Sprintf("unlock long-running LibreOffice listener: %v", err))
-
-					return
-				}
-			}()
-		}()
-
-		// If the LibreOffice listener is restarting while acquiring the lock,
-		// the port will change. It's therefore important to add the port args
-		// after we acquire the lock.
-		args = append(args, "--port", fmt.Sprintf("%d", mod.listener.port()))
-	}
-
-	checkedEntry := logger.Check(zap.DebugLevel, "check for debug level before setting high verbosity")
-	if checkedEntry != nil {
-		args = append(args, "-vvv")
-	}
-
-	if options.Landscape {
-		args = append(args, "--printer", "PaperOrientation=landscape")
-	}
-
-	if options.PageRanges != "" {
-		args = append(args, "--export", fmt.Sprintf("PageRange=%s", options.PageRanges))
-	}
-
-	switch options.PDFformat {
-	case "":
-	case gotenberg.FormatPDFA1a:
-		args = append(args, "--export", "SelectPdfVersion=1")
-	case gotenberg.FormatPDFA2b:
-		args = append(args, "--export", "SelectPdfVersion=2")
-	case gotenberg.FormatPDFA3b:
-		args = append(args, "--export", "SelectPdfVersion=3")
-	default:
-		return ErrInvalidPDFformat
-	}
-
-	args = append(args, "--output", outputPath, inputPath)
-
-	cmd, err := gotenberg.CommandContext(ctx, logger, mod.unoconvBinPath, args...)
-	if err != nil {
-		return fmt.Errorf("create unoconv command: %w", err)
-	}
-
-	logger.Debug(fmt.Sprintf("print to PDF with: %+v", options))
-
-	activeInstancesCountMu.Lock()
-	activeInstancesCount += 1
-	activeInstancesCountMu.Unlock()
-
-	exitCode, err := cmd.Exec()
-
-	activeInstancesCountMu.Lock()
-	activeInstancesCount -= 1
-	activeInstancesCountMu.Unlock()
-
-	if err == nil {
-		return nil
-	}
-
-	// Unoconv/LibreOffice 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
-	}
-
-	// Possible errors:
-	// 1. Unoconv/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("unoconv PDF: %w", err)
-}
-
-// Extensions returns the file extensions available for conversions.
-func (mod UNO) Extensions() []string {
-	return []string{
-		".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",
-		".jpeg",
-		".met",
-		".odd",
-		".otg",
-		".pbm",
-		".pct",
-		".pgm",
-		".ppm",
-		".ras",
-		".std",
-		".svg",
-		".svm",
-		".swf",
-		".sxd",
-		".sxw",
-		".tif",
-		".tiff",
-		".xhtml",
-		".xpm",
-		".odp",
-		".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",
-		".odg",
-		".dotx",
-		".xltx",
-	}
-}
-
-// UNO returns an API for interacting with LibreOffice.
-func (mod UNO) UNO() (API, error) {
-	return mod, nil
-}
-
-var (
-	listenerActiveInstancesCount   float64
-	listenerActiveInstancesCountMu sync.RWMutex
-	activeInstancesCount           float64
-	activeInstancesCountMu         sync.RWMutex
-)
-
-// Interface guards.
-var (
-	_ gotenberg.Module          = (*UNO)(nil)
-	_ gotenberg.Provisioner     = (*UNO)(nil)
-	_ gotenberg.Validator       = (*UNO)(nil)
-	_ gotenberg.App             = (*UNO)(nil)
-	_ gotenberg.MetricsProvider = (*UNO)(nil)
-	_ api.HealthChecker         = (*UNO)(nil)
-	_ API                       = (*UNO)(nil)
-	_ Provider                  = (*UNO)(nil)
-)

pkg/modules/libreoffice/uno/uno_test.go

@@ -1,817 +0,0 @@
-package uno
-
-import (
-	"context"
-	"errors"
-	"os"
-	"reflect"
-	"testing"
-	"time"
-
-	"github.com/alexliesenfeld/health"
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	flag "github.com/spf13/pflag"
-	"go.uber.org/zap"
-)
-
-func TestUNO_Descriptor(t *testing.T) {
-	descriptor := UNO{}.Descriptor()
-
-	actual := reflect.TypeOf(descriptor.New())
-	expect := reflect.TypeOf(new(UNO))
-
-	if actual != expect {
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
-	}
-}
-
-func TestUNO_Provision(t *testing.T) {
-	tests := []struct {
-		name               string
-		ctx                *gotenberg.Context
-		expectProvisionErr bool
-	}{
-		{
-			name: "nominal behavior",
-			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
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: new(UNO).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
-					},
-				)
-			}(),
-		},
-		{
-			name: "threshold from deprecated flag --unoconv-disable-listener",
-			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
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: func() *flag.FlagSet {
-							fs := new(UNO).Descriptor().FlagSet
-							err := fs.Parse([]string{"--unoconv-disable-listener=true"})
-
-							if err != nil {
-								t.Fatalf("expected no error from fs.Parse(), but got: %v", err)
-							}
-
-							return fs
-						}(),
-					},
-					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
-					},
-				)
-			}(),
-		},
-		{
-			name: "no logger provider",
-			ctx: func() *gotenberg.Context {
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: new(UNO).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{},
-				)
-			}(),
-			expectProvisionErr: true,
-		},
-		{
-			name: "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(UNO).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{
-						provider.Descriptor(),
-					},
-				)
-			}(),
-			expectProvisionErr: true,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			mod := new(UNO)
-			err := mod.Provision(tc.ctx)
-
-			if tc.expectProvisionErr && err == nil {
-				t.Errorf("expected mod.Provision() error, but got none")
-			}
-
-			if !tc.expectProvisionErr && err != nil {
-				t.Errorf("expected no error from mod.Provision(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestUNO_Validate(t *testing.T) {
-	tests := []struct {
-		name               string
-		unoconvBinPath     string
-		libreOfficeBinPath string
-		expectValidateErr  bool
-	}{
-		{
-			name:               "nominal behavior",
-			unoconvBinPath:     os.Getenv("UNOCONV_BIN_PATH"),
-			libreOfficeBinPath: os.Getenv("LIBREOFFICE_BIN_PATH"),
-		},
-		{
-			name:               "unoconv bin path does not exist",
-			unoconvBinPath:     "/foo",
-			libreOfficeBinPath: os.Getenv("LIBREOFFICE_BIN_PATH"),
-			expectValidateErr:  true,
-		},
-		{
-			name:               "LibreOffice bin path does not exist",
-			unoconvBinPath:     os.Getenv("UNOCONV_BIN_PATH"),
-			libreOfficeBinPath: "/foo",
-			expectValidateErr:  true,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			mod := UNO{
-				unoconvBinPath:     tc.unoconvBinPath,
-				libreOfficeBinPath: tc.libreOfficeBinPath,
-			}
-
-			err := mod.Validate()
-
-			if tc.expectValidateErr && err == nil {
-				t.Errorf("expected mod.Validate() error, but got none")
-			}
-
-			if !tc.expectValidateErr && err != nil {
-				t.Errorf("expected no error from mod.Validate(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestUNO_Start(t *testing.T) {
-
-}
-
-func TestUNO_StartupMessage(t *testing.T) {
-	tests := []struct {
-		name          string
-		mod           UNO
-		expectMessage string
-	}{
-		{
-			name: "long-running LibreOffice listener ready to start",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-			},
-			expectMessage: "long-running LibreOffice listener ready to start",
-		},
-		{
-			name: "long-running LibreOffice listener disabled",
-			mod: UNO{
-				libreOfficeRestartThreshold: 0,
-			},
-			expectMessage: "long-running LibreOffice listener disabled",
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			actual := tc.mod.StartupMessage()
-
-			if tc.expectMessage != actual {
-				t.Errorf("expected '%s' from mod.StartupMessage(), but got '%s'", tc.expectMessage, actual)
-			}
-		})
-	}
-}
-
-func TestUNO_Stop(t *testing.T) {
-	tests := []struct {
-		name          string
-		mod           UNO
-		expectStopErr bool
-	}{
-		{
-			name: "nominal behavior",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					stopMock: func(logger *zap.Logger) error {
-						return nil
-					},
-				},
-				logger: zap.NewNop(),
-			},
-		},
-		{
-			name: "no long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 0,
-				logger:                      zap.NewNop(),
-			},
-		},
-		{
-			name: "stop error",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					stopMock: func(logger *zap.Logger) error {
-						return errors.New("foo")
-					},
-				},
-				logger: zap.NewNop(),
-			},
-			expectStopErr: true,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			ctx, cancel := context.WithTimeout(context.Background(), time.Duration(10)*time.Second)
-			cancel()
-
-			err := tc.mod.Stop(ctx)
-
-			if tc.expectStopErr && err == nil {
-				t.Errorf("expected mod.Stop() error, but got none")
-			}
-
-			if !tc.expectStopErr && err != nil {
-				t.Errorf("expected no error from mod.Stop(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestUNO_Metrics(t *testing.T) {
-	tests := []struct {
-		name                                          string
-		mod                                           UNO
-		expectUnoconvActiveInstancesCount             float64
-		expectLibreOfficeListenerActiveInstancesCount float64
-		expectLibreOfficeListenerQueueLength          float64
-	}{
-		{
-			name: "with healthy long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					queueMock: func() int {
-						return 0
-					},
-					healthyMock: func() bool {
-						return true
-					},
-				},
-			},
-			expectLibreOfficeListenerActiveInstancesCount: 1,
-		},
-		{
-			name: "with unhealthy long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					queueMock: func() int {
-						return 0
-					},
-					healthyMock: func() bool {
-						return false
-					},
-				},
-			},
-		},
-		{
-			name: "with no long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 0,
-				listener: listenerMock{
-					queueMock: func() int {
-						return 0
-					},
-					healthyMock: func() bool {
-						return false
-					},
-				},
-			},
-		},
-		{
-			name: "with a queue of 3",
-			mod: UNO{
-				libreOfficeRestartThreshold: 0,
-				listener: listenerMock{
-					queueMock: func() int {
-						return 3
-					},
-					healthyMock: func() bool {
-						return true
-					},
-				},
-			},
-			expectLibreOfficeListenerQueueLength: 3,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			metrics, err := tc.mod.Metrics()
-			if err != nil {
-				t.Fatalf("expected no error from mod.Metrics(), but got: %v", err)
-			}
-
-			for _, metric := range metrics {
-				switch metric.Name {
-				case "unoconv_active_instances_count":
-					actual := metric.Read()
-					if actual != tc.expectUnoconvActiveInstancesCount {
-						t.Errorf("expected 'unoconv_active_instances_count' to be %.0f, but got %.0f", tc.expectUnoconvActiveInstancesCount, actual)
-					}
-				case "libreoffice_listener_active_instances_count":
-					actual := metric.Read()
-					if actual != tc.expectLibreOfficeListenerActiveInstancesCount {
-						t.Errorf("expected 'libreoffice_listener_active_instances_count' to be %.0f, but got %.0f", tc.expectLibreOfficeListenerActiveInstancesCount, actual)
-					}
-				case "unoconv_listener_active_instances_count":
-					actual := metric.Read()
-					if actual != tc.expectLibreOfficeListenerActiveInstancesCount {
-						t.Errorf("expected 'unoconv_listener_active_instances_count' to be %.0f, but got %.0f", tc.expectLibreOfficeListenerActiveInstancesCount, actual)
-					}
-				case "libreoffice_listener_queue_length":
-					actual := metric.Read()
-					if actual != tc.expectLibreOfficeListenerQueueLength {
-						t.Errorf("expected 'libreoffice_listener_queue_length' to be %.0f, but got %.0f", tc.expectLibreOfficeListenerQueueLength, actual)
-					}
-				case "unoconv_listener_queue_length":
-					actual := metric.Read()
-					if actual != tc.expectLibreOfficeListenerQueueLength {
-						t.Errorf("expected 'unoconv_listener_queue_length' to be %.0f, but got %.0f", tc.expectLibreOfficeListenerQueueLength, actual)
-					}
-				}
-			}
-		})
-	}
-}
-
-func TestUNO_Checks(t *testing.T) {
-	tests := []struct {
-		name                     string
-		mod                      UNO
-		expectAvailabilityStatus health.AvailabilityStatus
-	}{
-		{
-			name: "no long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 0,
-			},
-		},
-		{
-			name: "with healthy long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					healthyMock: func() bool {
-						return true
-					},
-				},
-			},
-			expectAvailabilityStatus: health.StatusUp,
-		},
-		{
-			name: "with unhealthy long-running LibreOffice listener",
-			mod: UNO{
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					healthyMock: func() bool {
-						return false
-					},
-				},
-			},
-			expectAvailabilityStatus: health.StatusDown,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			checks, err := tc.mod.Checks()
-			if err != nil {
-				t.Fatalf("expected no error from mod.Checks(), but got: %v", err)
-			}
-
-			if len(checks) == 0 {
-				return
-			}
-
-			if len(checks) != 1 {
-				t.Fatalf("expected 1 check from mod.Checks(), but got %d", len(checks))
-			}
-
-			checker := health.NewChecker(checks...)
-			result := checker.Check(context.Background())
-
-			if result.Status != tc.expectAvailabilityStatus {
-				t.Errorf("expected '%s' as availability status, but got '%s'", tc.expectAvailabilityStatus, result.Status)
-			}
-		})
-	}
-}
-
-func TestUNO_PDF(t *testing.T) {
-	tests := []struct {
-		name         string
-		mod          UNO
-		ctx          context.Context
-		logger       *zap.Logger
-		inputPath    string
-		options      Options
-		expectPDFErr bool
-		teardown     func(mod UNO) error
-	}{
-		{
-			name: "nominal behavior with no long-running LibreOffice listener",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-		},
-		{
-			name: "nominal behavior with a long-running LibreOffice listener",
-			mod: func() UNO {
-				mod := UNO{
-					unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-					libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-					libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-					libreOfficeRestartThreshold: 10,
-					logger:                      zap.NewNop(),
-				}
-				mod.listener = newLibreOfficeListener(
-					mod.logger,
-					mod.libreOfficeBinPath,
-					mod.libreOfficeStartTimeout,
-					mod.libreOfficeRestartThreshold,
-				)
-
-				return mod
-			}(),
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			teardown: func(mod UNO) error {
-				ctx, cancel := context.WithCancel(context.Background())
-				cancel()
-
-				return mod.Stop(ctx)
-			},
-		},
-		{
-			name: "convert with a debug logger",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewExample(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-		},
-		{
-			name: "convert with landscape",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				Landscape: true,
-			},
-		},
-		{
-			name: "convert with page ranges",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PageRanges: "1-2",
-			},
-		},
-		{
-			name: "convert with invalid page ranges",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PageRanges: "foo",
-			},
-			expectPDFErr: true,
-		},
-		{
-			name: "convert to PDF/A-1a",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PDFformat: gotenberg.FormatPDFA1a,
-			},
-		},
-		{
-			name: "convert to PDF/A-2b",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PDFformat: gotenberg.FormatPDFA2b,
-			},
-		},
-		{
-			name: "convert to PDF/A-3b",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PDFformat: gotenberg.FormatPDFA3b,
-			},
-		},
-		{
-			name: "convert to invalid PDF format",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PDFformat: "foo",
-			},
-			expectPDFErr: true,
-		},
-		{
-			name: "nil context",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx:          nil,
-			logger:       zap.NewNop(),
-			inputPath:    "/tests/test/testdata/libreoffice/sample1.docx",
-			expectPDFErr: true,
-		},
-		{
-			name: "expired context",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 0,
-			},
-			ctx: func() context.Context {
-				ctx, cancel := context.WithCancel(context.Background())
-				cancel()
-
-				return ctx
-			}(),
-			logger:       zap.NewNop(),
-			inputPath:    "/tests/test/testdata/libreoffice/sample1.docx",
-			expectPDFErr: true,
-		},
-		{
-			name: "cannot lock long-running LibreOffice listener",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					lockMock: func(ctx context.Context, logger *zap.Logger) error {
-						return errors.New("foo")
-					},
-				},
-				logger: zap.NewNop(),
-			},
-			ctx:          context.Background(),
-			logger:       zap.NewNop(),
-			inputPath:    "/tests/test/testdata/libreoffice/sample1.docx",
-			expectPDFErr: true,
-		},
-		{
-			name: "cannot unlock long-running LibreOffice listener",
-			mod: UNO{
-				unoconvBinPath:              os.Getenv("UNOCONV_BIN_PATH"),
-				libreOfficeBinPath:          os.Getenv("LIBREOFFICE_BIN_PATH"),
-				libreOfficeStartTimeout:     time.Duration(10) * time.Second,
-				libreOfficeRestartThreshold: 10,
-				listener: listenerMock{
-					lockMock: func(ctx context.Context, logger *zap.Logger) error {
-						return nil
-					},
-					unlockMock: func(logger *zap.Logger) error {
-						return errors.New("foo")
-					},
-					portMock: func() int {
-						return 2002
-					},
-				},
-				logger: zap.NewNop(),
-			},
-			ctx:          context.Background(),
-			logger:       zap.NewNop(),
-			inputPath:    "/tests/test/testdata/libreoffice/sample1.docx",
-			expectPDFErr: true,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			defer func() {
-				if tc.teardown == nil {
-					return
-				}
-
-				err := tc.teardown(tc.mod)
-				if err != nil {
-					t.Errorf("expected no error from tc.teardown(), but got: %v", err)
-				}
-			}()
-
-			outputDir, err := gotenberg.MkdirAll()
-			if err != nil {
-				t.Fatalf("expected no error from gotenberg.MkdirAll(), but got: %v", err)
-			}
-
-			defer func() {
-				err := os.RemoveAll(outputDir)
-				if err != nil {
-					t.Errorf("expected no error from os.RemoveAll(), but got: %v", err)
-				}
-			}()
-
-			err = tc.mod.PDF(tc.ctx, tc.logger, tc.inputPath, outputDir+"/foo.pdf", tc.options)
-
-			if tc.expectPDFErr && err == nil {
-				t.Fatalf("expected mod.PDF() error, but got none")
-			}
-
-			if !tc.expectPDFErr && err != nil {
-				t.Fatalf("expected no error from mod.PDF(), but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestUNO_Extensions(t *testing.T) {
-	mod := new(UNO)
-	extensions := mod.Extensions()
-
-	actual := len(extensions)
-	expect := 79
-
-	if actual != expect {
-		t.Errorf("expected %d extensions, but got %d", expect, actual)
-	}
-}
-
-func TestUNO_UNO(t *testing.T) {
-	mod := new(UNO)
-
-	_, err := mod.UNO()
-	if err != nil {
-		t.Errorf("expected no error from mod.UNO(), but got: %v", err)
-	}
-}
-
-type listenerMock struct {
-	startMock   func(logger *zap.Logger) error
-	stopMock    func(logger *zap.Logger) error
-	restartMock func(logger *zap.Logger) error
-	lockMock    func(ctx context.Context, logger *zap.Logger) error
-	unlockMock  func(logger *zap.Logger) error
-	portMock    func() int
-	queueMock   func() int
-	healthyMock func() bool
-}
-
-func (listener listenerMock) start(logger *zap.Logger) error {
-	return listener.startMock(logger)
-}
-
-func (listener listenerMock) stop(logger *zap.Logger) error {
-	return listener.stopMock(logger)
-}
-
-func (listener listenerMock) restart(logger *zap.Logger) error {
-	return listener.restartMock(logger)
-}
-
-func (listener listenerMock) lock(ctx context.Context, logger *zap.Logger) error {
-	return listener.lockMock(ctx, logger)
-}
-
-func (listener listenerMock) unlock(logger *zap.Logger) error {
-	return listener.unlockMock(logger)
-}
-
-func (listener listenerMock) port() int {
-	return listener.portMock()
-}
-
-func (listener listenerMock) queue() int {
-	return listener.queueMock()
-}
-
-func (listener listenerMock) healthy() bool {
-	return listener.healthyMock()
-}
-
-// Interface guards.
-var (
-	_ listener = (*listenerMock)(nil)
-)

pkg/modules/logging/doc.go

@@ -1,3 +1,3 @@
-// Package logging provides a module which creates a zap.Logger for other
-// modules.
+// Package logging provides a module which creates a zap.Logger instance for
+// other modules.
 package logging

pkg/modules/logging/logging.go

@@ -5,16 +5,17 @@ import (
 	"os"
 	"time"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	flag "github.com/spf13/pflag"
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 	"golang.org/x/term"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
-	gotenberg.MustRegisterModule(Logging{})
+	gotenberg.MustRegisterModule(new(Logging))
 }
 
 const (
@@ -30,20 +31,23 @@ const (
 	textLoggingFormat = "text"
 )
 
-// Logging is a module which implements the gotenberg.LoggerProvider interface.
+// Logging is a module which implements the [gotenberg.LoggerProvider]
+// interface.
 type Logging struct {
-	level  string
-	format string
+	level        string
+	format       string
+	fieldsPrefix string
 }
 
-// Descriptor returns a Logging's module descriptor.
-func (Logging) Descriptor() gotenberg.ModuleDescriptor {
+// Descriptor returns a [Logging]'s module descriptor.
+func (log *Logging) Descriptor() gotenberg.ModuleDescriptor {
 	return gotenberg.ModuleDescriptor{
 		ID: "logging",
 		FlagSet: func() *flag.FlagSet {
 			fs := flag.NewFlagSet("logging", flag.ExitOnError)
-			fs.String("log-level", infoLoggingLevel, fmt.Sprintf("Set the log level - %s, %s, %s, or %s", errorLoggingLevel, warnLoggingLevel, infoLoggingLevel, debugLoggingLevel))
-			fs.String("log-format", autoLoggingFormat, fmt.Sprintf("Set log format - %s, %s, or %s", autoLoggingFormat, jsonLoggingFormat, textLoggingFormat))
+			fs.String("log-level", infoLoggingLevel, fmt.Sprintf("Choose the level of logging detail. Options include %s, %s, %s, or %s", errorLoggingLevel, warnLoggingLevel, infoLoggingLevel, debugLoggingLevel))
+			fs.String("log-format", autoLoggingFormat, fmt.Sprintf("Specify the format of logging. Options include %s, %s, or %s", autoLoggingFormat, jsonLoggingFormat, textLoggingFormat))
+			fs.String("log-fields-prefix", "", "Prepend a specified prefix to each field in the logs")
 
 			return fs
 		}(),
@@ -57,12 +61,13 @@ func (log *Logging) Provision(ctx *gotenberg.Context) error {
 
 	log.level = flags.MustString("log-level")
 	log.format = flags.MustString("log-format")
+	log.fieldsPrefix = flags.MustString("log-fields-prefix")
 
 	return nil
 }
 
 // Validate validates the log level and format.
-func (log Logging) Validate() error {
+func (log *Logging) Validate() error {
 	var err error
 
 	switch log.level {
@@ -88,8 +93,8 @@ func (log Logging) Validate() error {
 	return err
 }
 
-// Logger returns a zap.Logger.
-func (log Logging) Logger(mod gotenberg.Module) (*zap.Logger, error) {
+// Logger returns a [zap.Logger].
+func (log *Logging) Logger(mod gotenberg.Module) (*zap.Logger, error) {
 	if logger == nil {
 		lvl, err := newLogLevel(log.level)
 		if err != nil {
@@ -101,29 +106,64 @@ func (log Logging) Logger(mod gotenberg.Module) (*zap.Logger, error) {
 			return nil, fmt.Errorf("get log encoder: %w", err)
 		}
 
-		core := zapcore.NewCore(encoder, os.Stderr, lvl)
-		logger = zap.New(core)
-
-		// nolint
-		defer logger.Sync()
+		logger = zap.New(customCore{
+			Core:         zapcore.NewCore(encoder, os.Stderr, lvl),
+			fieldsPrefix: log.fieldsPrefix,
+		})
 	}
 
 	return logger.Named(mod.Descriptor().ID), nil
 }
 
-func newLogLevel(level string) (zapcore.Level, error) {
-	switch level {
-	case errorLoggingLevel:
-		return zap.ErrorLevel, nil
-	case warnLoggingLevel:
-		return zap.WarnLevel, nil
-	case infoLoggingLevel:
-		return zap.InfoLevel, nil
-	case debugLoggingLevel:
-		return zap.DebugLevel, nil
-	default:
-		return -2, fmt.Errorf("%s is not a recognized log level", level)
+// See https://github.com/gotenberg/gotenberg/issues/659.
+type customCore struct {
+	zapcore.Core
+	fieldsPrefix string
+}
+
+func (c customCore) With(fields []zapcore.Field) zapcore.Core {
+	if c.fieldsPrefix != "" {
+		for i := range fields {
+			fields[i].Key = c.fieldsPrefix + "_" + fields[i].Key
+		}
 	}
+
+	return customCore{
+		Core:         c.Core.With(fields),
+		fieldsPrefix: c.fieldsPrefix,
+	}
+}
+
+func (c customCore) Check(ent zapcore.Entry, ce *zapcore.CheckedEntry) *zapcore.CheckedEntry {
+	// This is a copy from the zapcore.ioCore implementation. Indeed, by doing
+	// so, we are able to prefix the fields given to the logger methods like
+	// Debug, Info, Warn, Error, etc.
+	if c.Enabled(ent.Level) {
+		return ce.AddCore(ent, c)
+	}
+
+	return ce
+}
+
+func (c customCore) Write(entry zapcore.Entry, fields []zapcore.Field) error {
+	if c.fieldsPrefix != "" {
+		for i := range fields {
+			fields[i].Key = c.fieldsPrefix + "_" + fields[i].Key
+		}
+	}
+
+	return c.Core.Write(entry, fields)
+}
+
+func newLogLevel(level string) (zapcore.Level, error) {
+	lvl := zapcore.InvalidLevel
+
+	err := lvl.UnmarshalText([]byte(level))
+	if err != nil {
+		return lvl, fmt.Errorf("%q is not a recognized log level: %w", level, err)
+	}
+
+	return lvl, nil
 }
 
 func newLogEncoder(format string) (zapcore.Encoder, error) {
@@ -158,6 +198,7 @@ func newLogEncoder(format string) (zapcore.Encoder, error) {
 	}
 }
 
+// Singleton so that we instantiate our logger only once.
 var logger *zap.Logger = nil
 
 // Interface guards.
@@ -166,4 +207,5 @@ var (
 	_ gotenberg.Provisioner    = (*Logging)(nil)
 	_ gotenberg.Validator      = (*Logging)(nil)
 	_ gotenberg.LoggerProvider = (*Logging)(nil)
+	_ zapcore.Core             = (*customCore)(nil)
 )

pkg/modules/logging/logging_test.go

@@ -1,23 +1,19 @@
 package logging
 
 import (
+	"fmt"
 	"reflect"
 	"testing"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
+	"go.uber.org/zap/zaptest/observer"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
-type ProtoModule struct {
-	descriptor func() gotenberg.ModuleDescriptor
-}
-
-func (mod ProtoModule) Descriptor() gotenberg.ModuleDescriptor {
-	return mod.descriptor()
-}
-
 func TestLogging_Descriptor(t *testing.T) {
-	descriptor := Logging{}.Descriptor()
+	descriptor := new(Logging).Descriptor()
 
 	actual := reflect.TypeOf(descriptor.New())
 	expect := reflect.TypeOf(new(Logging))
@@ -28,172 +24,324 @@ func TestLogging_Descriptor(t *testing.T) {
 }
 
 func TestLogging_Provision(t *testing.T) {
-	logging := new(Logging)
-	fs := logging.Descriptor().FlagSet
+	for _, tc := range []struct {
+		scenario           string
+		level              string
+		format             string
+		fieldsPrefix       string
+		expectLevel        string
+		expectFormat       string
+		expectFieldsPrefix string
+	}{
+		{
+			scenario:           "default values",
+			expectLevel:        infoLoggingLevel,
+			expectFormat:       autoLoggingFormat,
+			expectFieldsPrefix: "",
+		},
+		{
+			scenario:           "explicit values",
+			level:              "debug",
+			format:             "json",
+			fieldsPrefix:       "gotenberg",
+			expectLevel:        debugLoggingLevel,
+			expectFormat:       jsonLoggingFormat,
+			expectFieldsPrefix: "gotenberg",
+		},
+		{
+			scenario:           "wrong values", // no validation at this point.
+			level:              "foo",
+			format:             "foo",
+			expectLevel:        "foo",
+			expectFormat:       "foo",
+			expectFieldsPrefix: "",
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			var flags []string
 
-	err := fs.Parse([]string{""})
-	if err != nil {
-		t.Fatalf("expected no error but got: %v", err)
-	}
+			if tc.level != "" {
+				flags = append(flags, "--log-level", tc.level)
+			}
 
-	ctx := gotenberg.NewContext(gotenberg.ParsedFlags{FlagSet: fs}, nil)
+			if tc.format != "" {
+				flags = append(flags, "--log-format", tc.format)
+			}
 
-	err = logging.Provision(ctx)
-	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
+			if tc.fieldsPrefix != "" {
+				flags = append(flags, "--log-fields-prefix", tc.fieldsPrefix)
+			}
+
+			logging := new(Logging)
+			fs := logging.Descriptor().FlagSet
+
+			err := fs.Parse(flags)
+			if err != nil {
+				t.Fatalf("expected no error while parsing flags but got: %v", err)
+			}
+
+			ctx := gotenberg.NewContext(gotenberg.ParsedFlags{FlagSet: fs}, nil)
+
+			err = logging.Provision(ctx)
+			if err != nil {
+				t.Fatalf("expected no error while provisioning but got: %v", err)
+			}
+
+			if logging.level != tc.expectLevel {
+				t.Errorf("expected logging level '%s' but got '%s'", tc.expectLevel, logging.level)
+			}
+
+			if logging.format != tc.expectFormat {
+				t.Errorf("expected logging format '%s' but got '%s'", tc.expectFormat, logging.format)
+			}
+
+			if logging.fieldsPrefix != tc.expectFieldsPrefix {
+				t.Errorf("expected logging fields prefix '%s' but got '%s'", tc.expectFieldsPrefix, logging.fieldsPrefix)
+			}
+		})
 	}
 }
 
 func TestLogging_Validate(t *testing.T) {
-	for i, tc := range []struct {
-		level, format string
-		expectErr     bool
+	for _, tc := range []struct {
+		scenario    string
+		level       string
+		format      string
+		expectError bool
 	}{
 		{
-			level:     "foo",
-			expectErr: true,
+			scenario:    "invalid level",
+			level:       "foo",
+			expectError: true,
 		},
 		{
-			level:     debugLoggingLevel,
-			format:    "foo",
-			expectErr: true,
+			scenario:    "invalid format",
+			level:       debugLoggingLevel,
+			format:      "foo",
+			expectError: true,
 		},
 		{
-			level:  debugLoggingLevel,
-			format: autoLoggingFormat,
+			scenario: "valid level and format",
+			level:    debugLoggingLevel,
+			format:   autoLoggingFormat,
 		},
 	} {
-		mod := new(Logging)
-		mod.level = tc.level
-		mod.format = tc.format
+		logging := new(Logging)
+		logging.level = tc.level
+		logging.format = tc.format
 
-		err := mod.Validate()
+		err := logging.Validate()
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		if tc.expectError && err == nil {
+			t.Errorf("%s: expected error but got: %v", tc.scenario, err)
 		}
 
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+		if !tc.expectError && err != nil {
+			t.Errorf("%s: expected no error but got: %v", tc.scenario, err)
 		}
 	}
 }
 
 func TestLogging_Logger(t *testing.T) {
-	for i, tc := range []struct {
-		level, format string
-		expectErr     bool
+	for _, tc := range []struct {
+		scenario     string
+		level        string
+		format       string
+		fieldsPrefix string
+		expectError  bool
 	}{
 		{
-			level:     "foo",
-			expectErr: true,
+			scenario:    "invalid level",
+			level:       "foo",
+			expectError: true,
 		},
 		{
-			level:     debugLoggingLevel,
-			format:    "foo",
-			expectErr: true,
+			scenario:    "invalid format",
+			level:       debugLoggingLevel,
+			format:      "foo",
+			expectError: true,
 		},
 		{
-			level:  debugLoggingLevel,
-			format: autoLoggingFormat,
+			scenario: "valid level and format",
+			level:    debugLoggingLevel,
+			format:   autoLoggingFormat,
 		},
 	} {
-		mod := new(Logging)
-		mod.level = tc.level
-		mod.format = tc.format
+		t.Run(tc.scenario, func(t *testing.T) {
+			logging := new(Logging)
+			logging.level = tc.level
+			logging.format = tc.format
+			logging.fieldsPrefix = tc.fieldsPrefix
 
-		_, err := mod.Logger(ProtoModule{
-			descriptor: func() gotenberg.ModuleDescriptor {
-				return gotenberg.ModuleDescriptor{ID: "foo", New: nil}
-			},
+			_, err := logging.Logger(&gotenberg.ModuleMock{
+				DescriptorMock: func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "mock", New: nil}
+				},
+			})
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 		})
-
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
-
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
 	}
 }
 
-func TestNewLogLevel(t *testing.T) {
-	for i, tc := range []struct {
-		level          string
-		expectZapLevel zapcore.Level
-		expectErr      bool
+func TestCustomCore(t *testing.T) {
+	for _, tc := range []struct {
+		scenario     string
+		level        zapcore.Level
+		fieldsPrefix string
+		expectEntry  bool
 	}{
 		{
+			scenario:     "level enabled",
+			level:        zapcore.DebugLevel,
+			fieldsPrefix: "gotenberg",
+			expectEntry:  true,
+		},
+		{
+			scenario:    "no fields prefix",
+			level:       zapcore.DebugLevel,
+			expectEntry: true,
+		},
+		{
+			scenario: "level disabled",
+			level:    zapcore.ErrorLevel,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			core, obsvr := observer.New(tc.level)
+			lgr := zap.New(customCore{
+				Core:         core,
+				fieldsPrefix: tc.fieldsPrefix,
+			}).With(zap.String("a_field", "a value"))
+
+			lgr.Debug("a debug message", zap.String("another_field", "another value"))
+
+			entries := obsvr.TakeAll()
+
+			if tc.expectEntry && len(entries) == 0 {
+				t.Fatal("expected an entry")
+			}
+
+			if !tc.expectEntry && len(entries) != 0 {
+				t.Fatal("expected no entry")
+			}
+
+			var prefix string
+			if tc.fieldsPrefix != "" {
+				prefix = tc.fieldsPrefix + "_"
+			}
+
+			for _, entry := range entries {
+				fields := entry.Context
+
+				if len(fields) != 2 {
+					t.Fatalf("expected 2 fields but got %d", len(fields))
+				}
+
+				if fields[0].Key != fmt.Sprintf("%sa_field", prefix) {
+					t.Errorf("expected 'gotenberg_a_field' but got '%s'", fields[0].Key)
+				}
+
+				if fields[1].Key != fmt.Sprintf("%sanother_field", prefix) {
+					t.Errorf("expected 'gotenberg_another_field' but got '%s'", fields[1].Key)
+				}
+			}
+		})
+	}
+}
+
+func Test_newLogLevel(t *testing.T) {
+	for _, tc := range []struct {
+		scenario       string
+		level          string
+		expectZapLevel zapcore.Level
+		expectError    bool
+	}{
+		{
+			scenario:       "error level",
 			level:          errorLoggingLevel,
 			expectZapLevel: zapcore.ErrorLevel,
 		},
 		{
+			scenario:       "warning level",
 			level:          warnLoggingLevel,
 			expectZapLevel: zapcore.WarnLevel,
 		},
 		{
+			scenario:       "info level",
 			level:          infoLoggingLevel,
 			expectZapLevel: zapcore.InfoLevel,
 		},
 		{
+			scenario:       "debug level",
 			level:          debugLoggingLevel,
 			expectZapLevel: zapcore.DebugLevel,
 		},
 		{
+			scenario:       "invalid level",
 			level:          "foo",
-			expectZapLevel: -2,
-			expectErr:      true,
+			expectZapLevel: zapcore.InvalidLevel,
+			expectError:    true,
 		},
 	} {
-		actual, err := newLogLevel(tc.level)
+		t.Run(tc.scenario, func(t *testing.T) {
+			actual, err := newLogLevel(tc.level)
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
 
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
 
-		if tc.expectZapLevel != actual {
-			t.Errorf("test %d: expected %d level but got %d", i, tc.expectZapLevel, actual)
-		}
+			if tc.expectZapLevel != actual {
+				t.Errorf("expected %d level but got %d", tc.expectZapLevel, actual)
+			}
+		})
 	}
 }
 
-func TestNewLogEncoder(t *testing.T) {
-	for i, tc := range []struct {
-		format    string
-		expectErr bool
+func Test_newLogEncoder(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		format      string
+		expectError bool
 	}{
 		{
-			format: autoLoggingFormat,
+			scenario: "auto format",
+			format:   autoLoggingFormat,
 		},
 		{
-			format: textLoggingFormat,
+			scenario: "text format",
+			format:   textLoggingFormat,
 		},
 		{
-			format: jsonLoggingFormat,
+			scenario: "json format",
+			format:   jsonLoggingFormat,
 		},
 		{
-			format:    "foo",
-			expectErr: true,
+			scenario:    "invalid format",
+			format:      "foo",
+			expectError: true,
 		},
 	} {
-		_, err := newLogEncoder(tc.format)
+		t.Run(tc.scenario, func(t *testing.T) {
+			_, err := newLogEncoder(tc.format)
 
-		if tc.expectErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
 
-		if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
+			if !tc.expectError && err != nil {
+				t.Errorf("expected no error but got: %v", err)
+			}
+		})
 	}
 }
-
-// Interface guards.
-var (
-	_ gotenberg.Module = (*ProtoModule)(nil)
-)

pkg/modules/pdfcpu/doc.go

@@ -1,4 +1,7 @@
-// Package pdfcpu provides a module which wraps the
-// https://github.com/pdfcpu/pdfcpu library and implements the
-// gotenberg.PDFEngine interface.
+// Package pdfcpu provides an implementation of the gotenberg.PdfEngine
+// interface using the pdfcpu library. This package allows for:
+//
+// 1. The merging of PDF files.
+//
+// See: https://github.com/pdfcpu/pdfcpu.
 package pdfcpu

pkg/modules/pdfcpu/pdfcpu.go

@@ -4,44 +4,44 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	pdfcpuAPI "github.com/pdfcpu/pdfcpu/pkg/api"
 	pdfcpuLog "github.com/pdfcpu/pdfcpu/pkg/log"
-	pdfcpuConfig "github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
+	pdfcpuConfig "github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model"
 	"go.uber.org/zap"
+
+	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
 func init() {
-	gotenberg.MustRegisterModule(PDFcpu{})
+	gotenberg.MustRegisterModule(new(PdfCpu))
 }
 
-// PDFcpu is a module which wraps the https://github.com/pdfcpu/pdfcpu library
-// and implements the gotenberg.PDFEngine interface.
-type PDFcpu struct {
+// PdfCpu abstracts the pdfcpu library and implements the [gotenberg.PdfEngine]
+// interface.
+type PdfCpu struct {
 	conf *pdfcpuConfig.Configuration
 }
 
-// Descriptor returns a PDFcpu's module descriptor.
-func (PDFcpu) Descriptor() gotenberg.ModuleDescriptor {
+// Descriptor returns a [PdfCpu]'s module descriptor.
+func (engine *PdfCpu) Descriptor() gotenberg.ModuleDescriptor {
 	return gotenberg.ModuleDescriptor{
 		ID:  "pdfcpu",
-		New: func() gotenberg.Module { return new(PDFcpu) },
+		New: func() gotenberg.Module { return new(PdfCpu) },
 	}
 }
 
 // Provision sets the engine properties.
-func (engine *PDFcpu) Provision(_ *gotenberg.Context) error {
+func (engine *PdfCpu) Provision(ctx *gotenberg.Context) error {
 	pdfcpuConfig.ConfigPath = "disable"
 	pdfcpuLog.DisableLoggers()
-
 	engine.conf = pdfcpuConfig.NewDefaultConfiguration()
 
 	return nil
 }
 
-// Merge merges the given PDFs into a unique PDF.
-func (engine PDFcpu) Merge(_ context.Context, _ *zap.Logger, inputPaths []string, outputPath string) error {
-	err := pdfcpuAPI.MergeCreateFile(inputPaths, outputPath, engine.conf)
+// 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, false, engine.conf)
 	if err == nil {
 		return nil
 	}
@@ -49,14 +49,24 @@ func (engine PDFcpu) Merge(_ context.Context, _ *zap.Logger, inputPaths []string
 	return fmt.Errorf("merge PDFs with PDFcpu: %w", err)
 }
 
-// Convert is not available for this PDF engine.
-func (engine PDFcpu) Convert(_ context.Context, _ *zap.Logger, format, _, _ string) error {
-	return fmt.Errorf("convert PDF to '%s' with PDFcpu: %w", format, gotenberg.ErrPDFEngineMethodNotAvailable)
+// 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)
+}
+
+// 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.PDFEngine   = (*PDFcpu)(nil)
+	_ gotenberg.Module      = (*PdfCpu)(nil)
+	_ gotenberg.Provisioner = (*PdfCpu)(nil)
+	_ gotenberg.PdfEngine   = (*PdfCpu)(nil)
 )