fix: websocket timeout reached (fixes #524)

This reverts commit 27018fa8e2.

.github/workflows/continuous_integration.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Run linters
         uses: golangci/golangci-lint-action@v2
         with:
-          version: v1.43
+          version: v1.49.0
 
   tests:
     needs:

.golangci.yml

@@ -2,7 +2,6 @@ linters:
   disable-all: true
   enable:
     - bodyclose
-    - deadcode
     - errcheck
     - gofmt
     - goimports
@@ -13,11 +12,9 @@ linters:
     - misspell
     - prealloc
     - staticcheck
-    - structcheck
     - typecheck
     - unconvert
     - unused
-    - varcheck
 
 run:
   deadline: 5m

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 Julien Neuhart
+Copyright (c) 2022 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=1.17
+GOLANG_VERSION=1.19
 DOCKER_REPOSITORY=gotenberg
 GOTENBERG_VERSION=snapshot
 GOTENBERG_USER_GID=1001
 GOTENBERG_USER_UID=1001
-NOTO_COLOR_EMOJI_VERSION=v2.028 # See https://github.com/googlefonts/noto-emoji/releases.
+NOTO_COLOR_EMOJI_VERSION=v2.038 # See https://github.com/googlefonts/noto-emoji/releases.
-PDFTK_VERSION=1527259628 # See https://gitlab.com/pdftk-java/pdftk/-/releases - Binary package.
+PDFTK_VERSION=v3.3.3 # See https://gitlab.com/pdftk-java/pdftk/-/releases - Binary package.
-GOLANGCI_LINT_VERSION=v1.43.0 # See https://github.com/golangci/golangci-lint/releases.
+GOLANGCI_LINT_VERSION=v1.49.0 # See https://github.com/golangci/golangci-lint/releases.
 
 .PHONY: build
 build: ## Build the Gotenberg's Docker image
@@ -29,16 +29,16 @@ build: ## Build the Gotenberg's Docker image
 GOTENBERG_GRACEFUL_SHUTDOWN_DURATION=30s
 API_PORT=3000
 API_PORT_FROM_ENV=
-API_READ_TIMEOUT=30s
+API_TIMEOUT=30s
-API_PROCESS_TIMEOUT=30s
-API_WRITE_TIMEOUT=30s
 API_ROOT_PATH=/
 API_TRACE_HEADER=Gotenberg-Trace
 API_DISABLE_HEALTH_CHECK_LOGGING=false
 CHROMIUM_INCOGNITO=false
+CHROMIUM_ALLOW_INSECURE_LOCALHOST=false
 CHROMIUM_IGNORE_CERTIFICATE_ERRORS=false
 CHROMIUM_DISABLE_WEB_SECURITY=false
 CHROMIUM_ALLOW_FILE_ACCESS_FROM_FILES=false
+CHROMIUM_HOST_RESOLVER_RULES=
 CHROMIUM_PROXY_SERVER=
 CHROMIUM_ALLOW_LIST=
 CHROMIUM_DENY_LIST="^file:///[^tmp].*"
@@ -53,6 +53,8 @@ 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=
@@ -60,6 +62,7 @@ WEBHOOK_ERROR_DENY_LIST=
 WEBHOOK_MAX_RETRY=4
 WEBHOOK_RETRY_MIN_WAIT=1s
 WEBHOOK_RETRY_MAX_WAIT=30s
+WEBHOOK_CLIENT_TIMEOUT=30s
 WEBHOOK_DISABLE=false
 
 .PHONY: run
@@ -71,16 +74,16 @@ run: ## Start a Gotenberg container
 	--gotenberg-graceful-shutdown-duration=$(GOTENBERG_GRACEFUL_SHUTDOWN_DURATION) \
 	--api-port=$(API_PORT) \
 	--api-port-from-env=$(API_PORT_FROM_ENV) \
-	--api-read-timeout=$(API_READ_TIMEOUT) \
+	--api-timeout=$(API_TIMEOUT) \
-	--api-process-timeout=$(API_PROCESS_TIMEOUT) \
-	--api-write-timeout=$(API_WRITE_TIMEOUT) \
 	--api-root-path=$(API_ROOT_PATH) \
 	--api-trace-header=$(API_TRACE_HEADER) \
 	--api-disable-health-check-logging=$(API_DISABLE_HEALTH_CHECK_LOGGING) \
 	--chromium-incognito=$(CHROMIUM_INCOGNITO) \
+	--chromium-allow-insecure-localhost=$(CHROMIUM_ALLOW_INSECURE_LOCALHOST) \
 	--chromium-ignore-certificate-errors=$(CHROMIUM_IGNORE_CERTIFICATE_ERRORS) \
 	--chromium-disable-web-security=$(CHROMIUM_DISABLE_WEB_SECURITY) \
 	--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=$(CHROMIUM_DENY_LIST) \
@@ -95,6 +98,8 @@ run: ## Start a Gotenberg container
 	--prometheus-collect-interval=$(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-error-allow-list=$(WEBHOOK_ERROR_ALLOW_LIST) \
@@ -102,6 +107,7 @@ run: ## Start a Gotenberg container
 	--webhook-max-retry=$(WEBHOOK_MAX_RETRY) \
 	--webhook-retry-min-wait=$(WEBHOOK_RETRY_MIN_WAIT) \
 	--webhook-retry-max-wait=$(WEBHOOK_RETRY_MAX_WAIT) \
+	--webhook-client-timeout=$(WEBHOOK_CLIENT_TIMEOUT) \
 	--webhook-disable=$(WEBHOOK_DISABLE)
 
 .PHONY: build-tests
@@ -145,5 +151,6 @@ release: ## Build the Gotenberg's Docker image for many platforms, then push it
 	$(GOTENBERG_VERSION) \
 	$(GOTENBERG_USER_GID) \
 	$(GOTENBERG_USER_UID) \
+	$(NOTO_COLOR_EMOJI_VERSION) \
 	$(PDFTK_VERSION) \
 	$(DOCKER_REPOSITORY)

README.md

@@ -1,14 +1,14 @@
 <p align="center">
     <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>
+    <h3 align="center">Gotenberg</h3>
-<p align="center">A Docker-powered stateless API for PDF files</p>
+    <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/about">Documentation</a> &#183; 🔥 <a href="https://gotenberg.dev/docs/get-started/live-demo">Live Demo</a></p>
 </p>
 
 ---
 
-Gotenberg provides a developer-friendly API to interact with powerful tools like Chromium and LibreOffice to convert many
+Gotenberg provides a developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting 
-documents (HTML, Markdown, Word, Excel, etc.) to PDF, transform them, merge them, and more!
+numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more!
 
 ## Quick Start
 
@@ -43,4 +43,3 @@ Head to the [documentation](https://gotenberg.dev/docs/about) to learn how to in
 [![Continuous Integration](https://github.com/gotenberg/gotenberg/actions/workflows/continuous_integration.yml/badge.svg)](https://github.com/gotenberg/gotenberg/actions/workflows/continuous_integration.yml)
 [![Go Reference](https://pkg.go.dev/badge/github.com/gotenberg/gotenberg.svg)](https://pkg.go.dev/github.com/gotenberg/gotenberg/v7)
 [![Codecov](https://codecov.io/gh/gotenberg/gotenberg/branch/main/graph/badge.svg)](https://codecov.io/gh/gotenberg/gotenberg)
-[![Go Report Card](https://goreportcard.com/badge/github.com/gotenberg/gotenberg)](https://goreportcard.com/report/gotenberg/gotenberg)

build/Dockerfile

@@ -64,10 +64,10 @@ RUN \
     mkdir /home/gotenberg &&\
     chown gotenberg: /home/gotenberg &&\
     # Install dependencies required for the next instructions or debugging.
-    # Note: procps for "top" command (useful when debugging processes).
     # 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 procps tini python3 default-jre-headless &&\
+    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 &&\
     # Install fonts.
     # Credits:
     # https://github.com/arachnys/athenapdf/blob/master/cli/Dockerfile.
@@ -103,6 +103,7 @@ RUN \
     fonts-liberation \
     fonts-liberation2 \
     fonts-linuxlibertine \
+    fonts-noto-cjk \
     fonts-noto-core \
     fonts-noto-mono \
     fonts-noto-ui-core \
@@ -117,20 +118,24 @@ RUN \
     # Install Google Chrome / Chromium.
     /tmp/install-chromium.sh &&\
     # Install LibreOffice.
-    # Note: we use the sid distribution to get the latest LibreOffice version.
+    # Note: we use the bullseye-backports distribution to get the latest LibreOffice version.
-    # See https://github.com/gotenberg/gotenberg/pull/322.
+    # See:
-    echo "deb https://httpredir.debian.org/debian/ sid main contrib non-free" >> /etc/apt/sources.list &&\
+    # 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 sid libreoffice &&\
+    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.
     ln -s /usr/bin/python3 /usr/bin/python &&\
     # Download PDFtk.
-    # See https://github.com/gotenberg/gotenberg/pull/273.
+    # See https://github.com/gotenberg/gotenberg/pull/273. \
-    curl -o /usr/bin/pdftk-all.jar "https://gitlab.com/pdftk-java/pdftk/-/jobs/$PDFTK_VERSION/artifacts/raw/build/libs/pdftk-all.jar" &&\
+    curl -o /usr/bin/pdftk-all.jar "https://gitlab.com/api/v4/projects/5024297/packages/generic/pdftk-java/$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 &&\
     # See https://github.com/nextcloud/docker/issues/380.
     mkdir -p /usr/share/man/man1mkdir -p /usr/share/man/man1 &&\
     # Cleanup.
@@ -142,7 +147,8 @@ RUN \
     chromium --version &&\
     libreoffice --version &&\
     unoconv --version &&\
-    pdftk --version
+    pdftk --version &&\
+    qpdf --version
 
 # Copy the Gotenberg binary from the builder stage.
 COPY --from=builder /home/gotenberg /usr/bin/
@@ -151,7 +157,9 @@ COPY --from=builder /home/gotenberg /usr/bin/
 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 PDFTK_BIN_PATH /usr/bin/pdftk
+ENV QPDF_BIN_PATH /usr/bin/qpdf
 
 USER gotenberg
 WORKDIR /home/gotenberg
@@ -160,4 +168,4 @@ WORKDIR /home/gotenberg
 EXPOSE 3000
 
 ENTRYPOINT [ "/usr/bin/tini", "--" ]
-CMD [ "gotenberg" ]
+CMD [ "gotenberg" ]

cmd/gotenberg.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	flag "github.com/spf13/pflag"
+	"golang.org/x/sync/errgroup"
 )
 
 // See https://patorjk.com/software/taag/#p=display&f=Small%20Slant&t=Gotenberg.
@@ -33,7 +34,7 @@ var Version = "snapshot"
 func Run() {
 	fmt.Printf(banner, Version)
 
-	// Creates the roo` FlagSet and adds the modules flags to it.
+	// Create the root FlagSet and adds the modules flags to it.
 	fs := flag.NewFlagSet("gotenberg", flag.ExitOnError)
 	fs.Duration("gotenberg-graceful-shutdown-duration", time.Duration(30)*time.Second, "Set the graceful shutdown duration")
 
@@ -46,14 +47,14 @@ func Run() {
 
 	fmt.Printf("[SYSTEM] modules: %s\n", modsInfo)
 
-	// Parses the flags...
+	// Parse the flags...
 	err := fs.Parse(os.Args[1:])
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 
-	// ...and creates a wrapper around those.
+	// ...and create a wrapper around those.
 	parsedFlags := gotenberg.ParsedFlags{FlagSet: fs}
 
 	// Get the graceful shutdown duration.
@@ -61,7 +62,7 @@ func Run() {
 
 	ctx := gotenberg.NewContext(parsedFlags, descriptors)
 
-	// Starts application modules.
+	// Start application modules.
 	apps, err := ctx.Modules(new(gotenberg.App))
 	if err != nil {
 		fmt.Printf("[FATAL] %s\n", err)
@@ -87,7 +88,23 @@ func Run() {
 
 			fmt.Printf("[SYSTEM] %s: %s\n", id, startupMessage)
 		}(a.(gotenberg.App))
+	}
 
+	// Get modules that want to print system messages.
+	sysLoggers, err := ctx.Modules(new(gotenberg.SystemLogger))
+	if err != nil {
+		fmt.Printf("[FATAL] %s\n", err)
+		os.Exit(1)
+	}
+
+	for _, l := range sysLoggers {
+		go func(logger gotenberg.SystemLogger) {
+			id := logger.(gotenberg.Module).Descriptor().ID
+
+			for _, message := range logger.SystemMessages() {
+				fmt.Printf("[SYSTEM] %s: %s\n", id, message)
+			}
+		}(l.(gotenberg.SystemLogger))
 	}
 
 	quit := make(chan os.Signal, 1)
@@ -101,18 +118,40 @@ func Run() {
 	gracefulShutdownCtx, cancel := context.WithTimeout(context.Background(), gracefulShutdownDuration)
 	defer cancel()
 
+	forceQuit := make(chan os.Signal, 1)
+	signal.Notify(forceQuit, os.Interrupt)
+
+	go func() {
+		// In case of force quit, cancel the context.
+		<-forceQuit
+		cancel()
+	}()
+
 	fmt.Printf("[SYSTEM] graceful shutdown of %s\n", gracefulShutdownDuration)
 
+	eg, _ := errgroup.WithContext(gracefulShutdownCtx)
+
 	for _, a := range apps {
-		id := a.(gotenberg.Module).Descriptor().ID
+		eg.Go(func(app gotenberg.App) func() error {
-		app := a.(gotenberg.App)
+			return func() error {
+				id := app.(gotenberg.Module).Descriptor().ID
 
-		err = app.Stop(gracefulShutdownCtx)
+				err = app.Stop(gracefulShutdownCtx)
-		if err != nil {
+				if err != nil {
-			fmt.Printf("[ERROR] stopping %s: %s\n", id, err)
+					return fmt.Errorf("stopping %s: %w", id, err)
-		}
+				}
 
-		fmt.Printf("[SYSTEM] %s: application stopped\n", id)
+				fmt.Printf("[SYSTEM] %s: application stopped\n", id)
+
+				return nil
+			}
+		}(a.(gotenberg.App)))
+	}
+
+	err = eg.Wait()
+	if err != nil {
+		fmt.Printf("[FATAL] %v\n", err)
+		os.Exit(1)
 	}
 
 	os.Exit(0)

go.mod

@@ -1,40 +1,40 @@
 module github.com/gotenberg/gotenberg/v7
 
-go 1.17
+go 1.19
 
 require (
 	github.com/alexliesenfeld/health v0.6.0
 	github.com/andybalholm/brotli v1.0.4 // indirect
-	github.com/chromedp/cdproto v0.0.0-20211112223831-e508c7bf6446
+	github.com/chromedp/cdproto v0.0.0-20221011223153-490dc4d81f7c
-	github.com/chromedp/chromedp v0.7.4
+	github.com/chromedp/chromedp v0.8.6
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/uuid v1.3.0
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-retryablehttp v0.7.0
+	github.com/hashicorp/go-retryablehttp v0.7.1
-	github.com/klauspost/compress v1.13.6 // indirect
+	github.com/klauspost/compress v1.15.11 // indirect
 	github.com/klauspost/pgzip v1.2.5 // indirect
-	github.com/labstack/echo/v4 v4.6.1
+	github.com/labstack/echo/v4 v4.9.1
-	github.com/labstack/gommon v0.3.1
+	github.com/labstack/gommon v0.4.0
-	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/mholt/archiver/v3 v3.5.1
-	github.com/microcosm-cc/bluemonday v1.0.16
+	github.com/microcosm-cc/bluemonday v1.0.21
-	github.com/nwaples/rardecode v1.1.2 // indirect
+	github.com/nwaples/rardecode v1.1.3 // indirect
-	github.com/pdfcpu/pdfcpu v0.3.12
+	github.com/pdfcpu/pdfcpu v0.3.13
-	github.com/pierrec/lz4/v4 v4.1.11 // indirect
+	github.com/pierrec/lz4/v4 v4.1.17 // indirect
-	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/client_golang v1.13.0
 	github.com/russross/blackfriday/v2 v2.1.0
 	github.com/spf13/pflag v1.0.5
 	github.com/ulikunitz/xz v0.5.10 // indirect
-	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/atomic v1.10.0 // indirect
-	go.uber.org/multierr v1.7.0
+	go.uber.org/multierr v1.8.0
-	go.uber.org/zap v1.19.1
+	go.uber.org/zap v1.23.0
-	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 // indirect
+	golang.org/x/crypto v0.0.0-20221012134737-56aed061732a // indirect
-	golang.org/x/image v0.0.0-20211028202545-6944b10bf410 // indirect
+	golang.org/x/image v0.0.0-20220902085622-e7cb96979f69 // indirect
-	golang.org/x/net v0.0.0-20210913180222-943fd674d43e
+	golang.org/x/net v0.0.0-20221014081412-f15817d10f9b
-	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
+	golang.org/x/sync v0.0.0-20220929204114-8fcdb60fdcc0
-	golang.org/x/sys v0.0.0-20211103235746-7861aae1554b // indirect
+	golang.org/x/sys v0.0.0-20221013171732-95e765b1cc43 // indirect
-	golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b
+	golang.org/x/term v0.0.0-20220919170432-7a66f970e087
-	golang.org/x/text v0.3.7
+	golang.org/x/text v0.3.8
 )
 
 require (
@@ -52,15 +52,15 @@ require (
 	github.com/hhrutter/tiff v0.0.0-20190829141212-736cae8d0bc7 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.2 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/prometheus/procfs v0.8.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasttemplate v1.2.1 // indirect
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -46,7 +46,6 @@ github.com/andybalholm/brotli v1.0.4/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHG
 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/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -55,11 +54,10 @@ github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
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@@ -83,9 +81,11 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2
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@@ -94,7 +94,6 @@ github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6Wezm
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@@ -136,8 +135,8 @@ github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -160,8 +159,8 @@ github.com/hashicorp/go-cleanhttp v0.5.2 h1:035FKYIWjmULyFRBKPs8TBQoi0x6d9G4xc9n
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@@ -176,6 +175,7 @@ github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX
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@@ -183,8 +183,8 @@ github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8
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 github.com/pierrec/lz4/v4 v4.1.2/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
-github.com/pierrec/lz4/v4 v4.1.11 h1:LVs17FAZJFOjgmJXl9Tf13WfLUvZq7/RjfEJrnwZ9OE=
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-github.com/pierrec/lz4/v4 v4.1.11/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
+github.com/pierrec/lz4/v4 v4.1.17/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
@@ -244,8 +241,10 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.7.1/go.mod h1:PY5Wy2awLA44sXw4AOSfFBetzPP4j5+D6mVACh+pe2M=
-github.com/prometheus/client_golang v1.11.0 h1:HNkLOAEQMIDv/K+04rukrLx6ch7msSRwf3/SASFAGtQ=
 github.com/prometheus/client_golang v1.11.0/go.mod h1:Z6t4BnS23TR94PD6BsDNk8yVqroYurpAkEiz0P2BEV0=
+github.com/prometheus/client_golang v1.12.1/go.mod h1:3Z9XVyYiZYEO+YQWt3RD2R3jrbd179Rt297l4aS6nDY=
+github.com/prometheus/client_golang v1.13.0 h1:b71QUfeo5M8gq2+evJdTPfZhYMAU0uKPkyPJ7TPsloU=
+github.com/prometheus/client_golang v1.13.0/go.mod h1:vTeo+zgvILHsnnj/39Ou/1fPN5nJFOEMgftOUOmlvYQ=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
@@ -254,14 +253,16 @@ github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6T
 github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/common v0.10.0/go.mod h1:Tlit/dnDKsSWFlCLTWaA1cyBgKHSMdTB80sz/V91rCo=
 github.com/prometheus/common v0.26.0/go.mod h1:M7rCNAaPfAosfx8veZJCuw84e35h3Cfd9VFqTh1DIvc=
-github.com/prometheus/common v0.32.1 h1:hWIdL3N2HoUx3B8j3YN9mWor0qhY/NlEKZEaXxuIRh4=
 github.com/prometheus/common v0.32.1/go.mod h1:vu+V0TpY+O6vW9J44gczi3Ap/oXXR10b+M/gUGO4Hls=
+github.com/prometheus/common v0.37.0 h1:ccBbHCgIiT9uSoFY0vX8H3zsNR5eLt17/RQLUvn8pXE=
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 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
-github.com/prometheus/procfs v0.7.3 h1:4jVXhlkAyzOScmCkXBTOLRLTz8EeU+eyjrwB/EPq0VU=
 github.com/prometheus/procfs v0.7.3/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
+github.com/prometheus/procfs v0.8.0 h1:ODq8ZFEaYeCaZOJlZZdJA2AbQR98dSHSM1KW/You5mo=
+github.com/prometheus/procfs v0.8.0/go.mod h1:z7EfXMXOkbkqb9IINtpCn86r/to3BnA0uaxHdg830/4=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
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 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -276,15 +277,14 @@ github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
 github.com/ulikunitz/xz v0.5.8/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/ulikunitz/xz v0.5.9/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/ulikunitz/xz v0.5.10 h1:t92gobL9l3HE202wg3rlk19F6X+JOxl9BBrCCMYEYd8=
 github.com/ulikunitz/xz v0.5.10/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
-github.com/valyala/fasttemplate v1.0.1/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
 github.com/valyala/fasttemplate v1.2.1 h1:TVEnxayobAdVkhQfrfes2IzOB6o+z4roRkPF52WA1u4=
 github.com/valyala/fasttemplate v1.2.1/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
 github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 h1:nIPpBwaJSVYIxUFsDv3M8ofmx9yWTog9BfvIu0q41lo=
@@ -292,30 +292,27 @@ github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8/go.mod h1:HUYIGzjTL3rfEspMx
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE=
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 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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@@ -329,9 +326,8 @@ golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMk
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
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+golang.org/x/image v0.0.0-20220902085622-e7cb96979f69 h1:Lj6HJGCSn5AjxRAH2+r35Mir4icalbqku+CLUtjnvXY=
-golang.org/x/image v0.0.0-20211028202545-6944b10bf410 h1:hTftEOvwiOq2+O8k2D5/Q7COC7k5Qcrgc2TFURJYnvQ=
+golang.org/x/image v0.0.0-20220902085622-e7cb96979f69/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
-golang.org/x/image v0.0.0-20211028202545-6944b10bf410/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
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@@ -350,7 +346,6 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@@ -379,18 +374,18 @@ golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
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-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
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-golang.org/x/net v0.0.0-20210614182718-04defd469f4e/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/net v0.0.0-20210913180222-943fd674d43e h1:+b/22bPvDYt4NPDcy4xAGCmON713ONAWFeY3Z7I3tR8=
+golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/net v0.0.0-20210913180222-943fd674d43e/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
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@@ -400,13 +395,12 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -415,13 +409,11 @@ golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -439,32 +431,33 @@ golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -505,11 +498,9 @@ golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roY
 golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
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-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
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@@ -586,8 +577,8 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
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-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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@@ -598,13 +589,12 @@ gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 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=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

pkg/gotenberg/cmd.go

@@ -31,7 +31,7 @@ func Command(logger *zap.Logger, binPath string, args ...string) Cmd {
 
 	return Cmd{
 		ctx:     nil,
-		logger:  logger.Named("cmd"),
+		logger:  logger.Named(strings.ReplaceAll(binPath, "/", "")),
 		process: cmd,
 	}
 }
@@ -51,7 +51,7 @@ func CommandContext(ctx context.Context, logger *zap.Logger, binPath string, arg
 
 	return Cmd{
 		ctx:     ctx,
-		logger:  logger.Named("cmd"),
+		logger:  logger.Named(strings.ReplaceAll(binPath, "/", "")),
 		process: cmd,
 	}, nil
 }
@@ -73,22 +73,37 @@ func (cmd Cmd) Start() error {
 	return nil
 }
 
+// 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 {
+	err := cmd.process.Wait()
+	if err != nil {
+		return fmt.Errorf("wait for unix process: %w", err)
+	}
+
+	return nil
+}
+
 // 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() error {
+func (cmd Cmd) Exec() (int, error) {
 	if cmd.ctx == nil {
-		return errors.New("nil context")
+		return 10, errors.New("nil context")
 	}
 
 	err := cmd.Start()
 	if err != nil {
-		return fmt.Errorf("start command: %w", err)
+		if cmd.process.ProcessState == nil {
+			return 131, fmt.Errorf("start command: %w", err)
+		}
+
+		return cmd.process.ProcessState.ExitCode(), fmt.Errorf("start command: %w", err)
 	}
 
 	errChan := make(chan error, 1)
 
 	go func() {
-		errChan <- cmd.process.Wait()
+		errChan <- cmd.Wait()
 	}()
 
 	select {
@@ -99,17 +114,21 @@ func (cmd Cmd) Exec() error {
 		}
 
 		if err == nil {
-			return nil
+			return 0, nil
 		}
 
-		return fmt.Errorf("unix process error: %w", err)
+		if cmd.process.ProcessState == nil {
+			return 131, fmt.Errorf("unix process error: %w", err)
+		}
+
+		return cmd.process.ProcessState.ExitCode(), fmt.Errorf("unix process error: %w", err)
 	case <-cmd.ctx.Done():
 		errProc := cmd.Kill()
 		if errProc != nil {
 			cmd.logger.Error(errProc.Error())
 		}
 
-		return fmt.Errorf("context done: %w", cmd.ctx.Err())
+		return 62, fmt.Errorf("context done: %w", cmd.ctx.Err())
 	}
 }
 

pkg/gotenberg/cmd_test.go

@@ -12,209 +12,313 @@ func TestCommand(t *testing.T) {
 	cmd := Command(zap.NewNop(), "foo")
 
 	if !cmd.process.SysProcAttr.Setpgid {
-		t.Error("expected Setpgid to be true")
+		t.Error("expected cmd.process.SysProcAttr.Setpgid to be true")
 	}
 }
 
 func TestCommandContext(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx       context.Context
+		name                    string
-		expectErr bool
+		ctx                     context.Context
+		expectCommandContextErr bool
 	}{
 		{
-			ctx:       nil,
+			name: "nominal behavior",
-			expectErr: true,
+			ctx:  context.Background(),
 		},
 		{
-			ctx: context.TODO(),
+			name:                    "nil context",
+			expectCommandContextErr: true,
 		},
-	} {
+	}
-		cmd, err := CommandContext(tc.ctx, zap.NewNop(), "foo")
 
-		if err == nil && !cmd.process.SysProcAttr.Setpgid {
+	for _, tc := range tests {
-			t.Fatalf("test %d: expected Setpgid to be true", i)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			cmd, err := CommandContext(tc.ctx, zap.NewNop(), "foo")
 
-		if tc.expectErr && err == nil {
+			if err == nil && !cmd.process.SysProcAttr.Setpgid {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+				t.Fatal("expected cmd.process.SysProcAttr.Setpgid to be true")
-		}
+			}
 
-		if !tc.expectErr && err != nil {
+			if tc.expectCommandContextErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Error("expected error from CommandContext(), but got none")
-		}
+			}
+
+			if !tc.expectCommandContextErr && err != nil {
+				t.Errorf("expected no error from CommandContext(), but got: %v", err)
+			}
+		})
 	}
 }
 
 func TestCmd_Start(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		cmd       Cmd
+		name           string
-		expectErr bool
+		cmd            Cmd
+		expectStartErr bool
 	}{
 		{
-			cmd:       Command(zap.NewNop(), "foo"),
+			name: "nominal behavior",
-			expectErr: true,
+			cmd:  Command(zap.NewNop(), "echo", "Hello", "World"),
 		},
 		{
-			cmd: Command(zap.NewNop(), "echo", "Hello", "World"),
+			name:           "start error",
+			cmd:            Command(zap.NewNop(), "foo"),
+			expectStartErr: true,
 		},
-	} {
+	}
-		err := tc.cmd.Start()
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			err := tc.cmd.Start()
 
-		if !tc.expectErr && err != nil {
+			if tc.expectStartErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Error("expected error from cmd.Start(), but got none")
-		}
+			}
+
+			if !tc.expectStartErr && err != nil {
+				t.Errorf("expected no error from cmd.Start(), but got: %v", err)
+			}
+		})
+	}
+}
+
+func TestCmd_Wait(t *testing.T) {
+	tests := []struct {
+		name          string
+		cmd           Cmd
+		expectWaitErr bool
+	}{
+		{
+			name: "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)
+				}
+
+				return cmd
+			}(),
+		},
+		{
+			name: "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)
+				}
+
+				err = cmd.Kill()
+				if err != nil {
+					t.Fatalf("expected no error from cmd.Kill(), but got: %v", err)
+				}
+
+				return cmd
+			}(),
+			expectWaitErr: true,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, 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.expectWaitErr && err != nil {
+				t.Errorf("expected no error from cmd.Wait(), but got: %v", err)
+			}
+		})
 	}
 }
 
 func TestCmd_Exec(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		cmd       Cmd
+		name          string
-		timeout   time.Duration
+		cmd           Cmd
-		expectErr bool
+		timeout       time.Duration
+		expectExecErr bool
 	}{
 		{
-			cmd:       Command(zap.NewNop(), "foo"),
+			name: "nominal behavior",
-			expectErr: true,
+			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
+			}(),
 		},
 		{
-			cmd:       Command(zap.NewNop(), "foo"),
+			name:          "nil context",
-			timeout:   time.Duration(5) * time.Second,
+			cmd:           Command(zap.NewNop(), "echo", "Hello", "World"),
-			expectErr: true,
+			expectExecErr: true,
 		},
 		{
-			cmd:     Command(zap.NewNop(), "echo", "Hello", "World"),
+			name: "start error",
-			timeout: time.Duration(5) * time.Second,
+			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)
+				}
+
+				return cmd
+			}(),
+			expectExecErr: true,
 		},
 		{
-			cmd:       Command(zap.NewNop(), "sleep", "3"),
+			name:          "context done",
-			timeout:   time.Duration(2) * time.Second,
+			cmd:           Command(zap.NewNop(), "sleep", "2"),
-			expectErr: true,
+			timeout:       time.Duration(1) * time.Second,
+			expectExecErr: true,
 		},
-	} {
+	}
-		if tc.timeout > 0 {
-			ctx, cancel := context.WithTimeout(context.TODO(), tc.timeout)
-			defer cancel()
 
-			tc.cmd.ctx = ctx
+	for _, tc := range tests {
-		}
+		t.Run(tc.name, func(t *testing.T) {
+			if tc.timeout > 0 {
+				ctx, cancel := context.WithTimeout(context.TODO(), tc.timeout)
+				defer cancel()
 
-		err := tc.cmd.Exec()
+				tc.cmd.ctx = ctx
+			}
 
-		if tc.expectErr && err == nil {
+			_, err := tc.cmd.Exec()
-			t.Errorf("test %d: expected error but got: %v", i, err)
-		}
 
-		if !tc.expectErr && err != nil {
+			if tc.expectExecErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Error("expected error from cmd.Exec(), but got none")
-		}
+			}
+
+			if !tc.expectExecErr && err != nil {
+				t.Errorf("expected no error from cmd.Exec(), but got: %v", err)
+			}
+		})
 	}
 }
 
 func TestCmd_pipeOutput(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		cmd       Cmd
+		name                string
-		run       bool
+		cmd                 Cmd
-		expectErr bool
+		run                 bool
+		expectPipeOutputErr bool
 	}{
 		{
-			cmd: Command(zap.NewNop(), "echo", "Hello", "World"),
+			name: "nominal behavior",
+			cmd:  Command(zap.NewExample(), "echo", "Hello", "World"),
+			run:  true,
 		},
 		{
+			name: "no debug, no pipe",
+			cmd:  Command(zap.NewNop(), "echo", "Hello", "World"),
+		},
+		{
+			name: "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 but got: %v", err)
+					t.Fatalf("expected no error from cmd.process.StdoutPipe(), but got: %v", err)
 				}
 
 				return cmd
 			}(),
-			expectErr: true,
+			expectPipeOutputErr: true,
 		},
 		{
+			name: "stderr already piped",
 			cmd: func() Cmd {
 				cmd := Command(zap.NewExample(), "echo", "Hello", "World")
-				_, err := cmd.process.StderrPipe()
 
+				_, err := cmd.process.StderrPipe()
 				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
+					t.Fatalf("expected no error from cmd.process.StderrPipe(), but got: %v", err)
 				}
 
 				return cmd
 			}(),
-			expectErr: true,
+			expectPipeOutputErr: true,
 		},
-		{
+	}
-			cmd: Command(zap.NewExample(), "echo", "Hello", "World"),
-			run: true,
-		},
-	} {
-		err := tc.cmd.pipeOutput()
 
-		if tc.run {
+	for _, tc := range tests {
-			errStart := tc.cmd.process.Start()
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.cmd.pipeOutput()
 
-			if errStart != nil {
+			if tc.run {
-				t.Fatalf("test %d: expected no error but got: %v", i, err)
+				errStart := tc.cmd.process.Start()
+				if errStart != nil {
+					t.Fatalf("expected no error from tc.cmd.process.Start(), but got: %v", errStart)
+				}
 			}
-		}
 
-		if tc.expectErr && err == nil {
+			if tc.expectPipeOutputErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+				t.Error("expected error from cmd.pipeOutput(), but got none")
-		}
+			}
 
-		if !tc.expectErr && err != nil {
+			if !tc.expectPipeOutputErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Errorf("expected no error from cmd.pipeOutput(), but got: %v", err)
-		}
+			}
+		})
 	}
 }
 
 func TestCmd_Kill(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		cmd       Cmd
+		name string
-		expectErr bool
+		cmd  Cmd
 	}{
 		{
-			cmd: Cmd{logger: zap.NewNop()},
+			name: "nominal behavior",
-		},
-		{
 			cmd: func() Cmd {
 				cmd := Command(zap.NewNop(), "sleep", "60")
-				err := cmd.process.Start()
 
+				err := cmd.process.Start()
 				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
+					t.Fatalf("expected no error from cmd.process.Start(), but got: %v", err)
 				}
 
 				return cmd
 			}(),
 		},
 		{
+			name: "no process",
+			cmd:  Cmd{logger: zap.NewNop()},
+		},
+		{
+			name: "process already killed",
 			cmd: func() Cmd {
-				cmd := Command(zap.NewNop(), "echo", "Hello", "World")
+				cmd := Command(zap.NewNop(), "sleep", "60")
-				err := cmd.process.Run()
 
+				err := cmd.process.Start()
 				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
+					t.Fatalf("expected no error from cmd.process.Start(), but got: %v", err)
+				}
+
+				err = cmd.Kill()
+				if err != nil {
+					t.Fatalf("expected no error from cmd.Kill(), but got: %v", err)
 				}
 
 				return cmd
 			}(),
 		},
-	} {
+	}
-		err := tc.cmd.Kill()
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			err := tc.cmd.Kill()
-
+			if err != nil {
-		if !tc.expectErr && err != nil {
+				t.Errorf("expected no error from cmd.Kill(), but got: %v", err)
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+			}
-		}
+		})
 	}
 }

pkg/gotenberg/mocks.go

@@ -0,0 +1,66 @@
+package gotenberg
+
+import (
+	"context"
+
+	"go.uber.org/zap"
+)
+
+// ModuleMock is a mock for the Module interface.
+type ModuleMock struct {
+	DescriptorMock func() ModuleDescriptor
+}
+
+func (mod ModuleMock) Descriptor() ModuleDescriptor {
+	return mod.DescriptorMock()
+}
+
+// ValidatorMock is a mock for the Validator interface.
+type ValidatorMock struct {
+	ValidateMock func() 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
+}
+
+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)
+}
+
+// PDFEngineProviderMock is a mock for the PDFEngineProvider interface.
+type PDFEngineProviderMock struct {
+	PDFEngineMock func() (PDFEngine, error)
+}
+
+func (provider PDFEngineProviderMock) PDFEngine() (PDFEngine, error) {
+	return provider.PDFEngineMock()
+}
+
+// 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) {
+	return provider.LoggerMock(mod)
+}
+
+// Interface guards.
+var (
+	_ Module            = (*ModuleMock)(nil)
+	_ Validator         = (*ValidatorMock)(nil)
+	_ PDFEngine         = (*PDFEngineMock)(nil)
+	_ PDFEngineProvider = (*PDFEngineProviderMock)(nil)
+	_ LoggerProvider    = (*LoggerProviderMock)(nil)
+)

pkg/gotenberg/mocks_test.go

@@ -0,0 +1,82 @@
+package gotenberg
+
+import (
+	"context"
+	"testing"
+
+	"go.uber.org/zap"
+)
+
+func TestModuleMock(t *testing.T) {
+	mock := ModuleMock{
+		DescriptorMock: func() ModuleDescriptor {
+			return ModuleDescriptor{ID: "foo", New: func() Module {
+				return nil
+			}}
+		},
+	}
+
+	if mock.Descriptor().ID != "foo" {
+		t.Errorf("expected ID '%s' from mock.Descriptor(), but got '%s'", "foo", mock.Descriptor().ID)
+	}
+}
+
+func TestValidatorMock(t *testing.T) {
+	mock := ValidatorMock{
+		ValidateMock: func() error {
+			return nil
+		},
+	}
+
+	err := mock.Validate()
+	if err != nil {
+		t.Errorf("expected no error from mock.Validate(), but got: %v", err)
+	}
+}
+
+func TestPDFEngineMock(t *testing.T) {
+	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 {
+			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)
+	}
+
+	err = mock.Convert(context.Background(), zap.NewNop(), "", "", "")
+	if err != nil {
+		t.Errorf("expected no error from mock.Convert(), but got: %v", err)
+	}
+}
+
+func TestPDFEngineProvider(t *testing.T) {
+	mock := PDFEngineProviderMock{
+		PDFEngineMock: func() (PDFEngine, error) {
+			return PDFEngineMock{}, nil
+		},
+	}
+
+	_, err := mock.PDFEngine()
+	if err != nil {
+		t.Errorf("expected no error from mock.PDFEngine(), but got: %v", err)
+	}
+}
+
+func TestLoggerProviderMock(t *testing.T) {
+	mock := LoggerProviderMock{
+		LoggerMock: func(mod Module) (*zap.Logger, error) {
+			return nil, nil
+		},
+	}
+
+	_, err := mock.Logger(ModuleMock{})
+	if err != nil {
+		t.Errorf("expected no error from mock.Logger(), but got: %v", err)
+	}
+}

pkg/gotenberg/modules.go

@@ -69,6 +69,12 @@ type App interface {
 	Stop(ctx context.Context) error
 }
 
+// SystemLogger is a module interface for modules which want to display
+// messages on startup.
+type SystemLogger interface {
+	SystemMessages() []string
+}
+
 // MustRegisterModule registers a module.
 //
 // To register a module, create an init() method in the module main go file:

pkg/modules/api/api.go

@@ -30,8 +30,8 @@ func init() {
 type API struct {
 	port                      int
 	readTimeout               time.Duration
-	processTimeout            time.Duration
 	writeTimeout              time.Duration
+	timeout                   time.Duration
 	rootPath                  string
 	traceHeader               string
 	disableHealthCheckLogging bool
@@ -102,28 +102,28 @@ const (
 // Middleware is a middleware which can be added to the API's middlewares
 // chain.
 //
-//  middleware := Middleware{
+//	middleware := Middleware{
-//    Handler: func() echo.MiddlewareFunc {
+//	  Handler: func() echo.MiddlewareFunc {
-//      return func(next echo.HandlerFunc) echo.HandlerFunc {
+//	    return func(next echo.HandlerFunc) echo.HandlerFunc {
-//        return func(c echo.Context) error {
+//	      return func(c echo.Context) error {
-//          rootPath := c.Get("rootPath").(string)
+//	        rootPath := c.Get("rootPath").(string)
-//          healthURI := fmt.Sprintf("%shealth", rootPath)
+//	        healthURI := fmt.Sprintf("%shealth", rootPath)
 //
-//          // Skip the middleware if health check URI.
+//	        // Skip the middleware if health check URI.
-//          if c.Request().RequestURI == healthURI {
+//	        if c.Request().RequestURI == healthURI {
-//            // Call the next middleware in the chain.
+//	          // Call the next middleware in the chain.
-//            return next(c)
+//	          return next(c)
-//          }
+//	        }
 //
-//          // Your middleware process.
+//	        // Your middleware process.
-//          // ...
+//	        // ...
 //
-//          // Call the next middleware in the chain.
+//	        // Call the next middleware in the chain.
-//          return next(c)
+//	        return next(c)
-//        }
+//	      }
-//      }
+//	    }
-//    }(),
+//	  }(),
-//  }
+//	}
 type Middleware struct {
 	// Stack tells in which stack the middleware should be located.
 	// Default to DefaultStack.
@@ -166,10 +166,20 @@ func (API) Descriptor() gotenberg.ModuleDescriptor {
 			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-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) },
@@ -180,9 +190,9 @@ func (API) Descriptor() gotenberg.ModuleDescriptor {
 func (a *API) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
 	a.port = flags.MustInt("api-port")
-	a.readTimeout = flags.MustDuration("api-read-timeout")
+	a.readTimeout = flags.MustDeprecatedDuration("api-read-timeout", "api-timeout")
-	a.processTimeout = flags.MustDuration("api-process-timeout")
+	a.writeTimeout = flags.MustDeprecatedDuration("api-write-timeout", "api-timeout")
-	a.writeTimeout = flags.MustDuration("api-write-timeout")
+	a.timeout = flags.MustDeprecatedDuration("api-process-timeout", "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")
@@ -274,7 +284,7 @@ func (a *API) Provision(ctx *gotenberg.Context) error {
 	}
 
 	// Grace duration.
-	a.gcGraceDuration = a.readTimeout + a.processTimeout + a.writeTimeout
+	a.gcGraceDuration = a.timeout
 
 	mods, err = ctx.Modules(new(GarbageCollectorGraceDurationIncrementer))
 	if err != nil {
@@ -378,7 +388,9 @@ func (a *API) Start() error {
 	a.srv.HideBanner = true
 	a.srv.HidePort = true
 	a.srv.Server.ReadTimeout = a.readTimeout
-	a.srv.Server.WriteTimeout = a.writeTimeout
+	a.srv.Server.IdleTimeout = a.timeout
+	// See https://github.com/gotenberg/gotenberg/issues/396.
+	a.srv.Server.WriteTimeout = a.writeTimeout + a.writeTimeout
 	a.srv.HTTPErrorHandler = httpErrorHandler()
 
 	// Let's prepare the modules' routes.
@@ -402,7 +414,6 @@ func (a *API) Start() error {
 		latencyMiddleware(),
 		rootPathMiddleware(a.rootPath),
 		traceMiddleware(a.traceHeader),
-		timeoutsMiddleware(a.readTimeout, a.processTimeout, a.writeTimeout),
 		loggerMiddleware(a.logger, disableLoggingForPaths),
 	)
 
@@ -419,14 +430,14 @@ func (a *API) Start() error {
 		}
 	}
 
-	hardTimeout := a.processTimeout + (time.Duration(5) * time.Second)
+	hardTimeout := a.timeout + (time.Duration(5) * time.Second)
 
 	// Add the modules' routes and their specific middlewares.
 	for _, route := range a.routes {
 		var middlewares []echo.MiddlewareFunc
 
 		if route.IsMultipart {
-			middlewares = append(middlewares, contextMiddleware(a.processTimeout))
+			middlewares = append(middlewares, contextMiddleware(a.timeout))
 
 			for _, externalMultipartMiddleware := range externalMultipartMiddlewares {
 				middlewares = append(middlewares, externalMultipartMiddleware.Handler)
@@ -447,7 +458,7 @@ func (a *API) Start() error {
 	a.srv.GET(
 		fmt.Sprintf("%s%s", a.rootPath, "health"),
 		func() echo.HandlerFunc {
-			checks := append(a.healthChecks, health.WithTimeout(a.processTimeout))
+			checks := append(a.healthChecks, health.WithTimeout(a.timeout))
 			checker := health.NewChecker(checks...)
 
 			return echo.WrapHandler(health.NewHandler(checker))

pkg/modules/api/api_test.go

@@ -386,7 +386,7 @@ func TestAPI_Provision(t *testing.T) {
 					},
 				)
 			}(),
-			expectGraceDuration: time.Duration(93) * time.Second,
+			expectGraceDuration: time.Duration(33) * time.Second,
 			expectErr:           true,
 		},
 		{

pkg/modules/api/context.go

@@ -276,71 +276,3 @@ func (ctx Context) OutputFilename(outputPath string) string {
 
 	return fmt.Sprintf("%s%s", filename, filepath.Ext(outputPath))
 }
-
-// MockContext is a helper for tests.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-type MockContext struct {
-	*Context
-}
-
-// SetDirPath sets the context's working directory path.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  ctx.SetDirPath("/foo")
-func (ctx *MockContext) SetDirPath(path string) {
-	ctx.dirPath = path
-}
-
-// SetValues sets the values.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  ctx.SetValues(map[string][]string{
-//    "url": {
-//      "foo",
-//    },
-//  })
-func (ctx *MockContext) SetValues(values map[string][]string) {
-	ctx.values = values
-}
-
-// SetFiles sets the files.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  ctx.SetFiles(map[string]string{
-//    "foo": "/foo",
-//  })
-func (ctx *MockContext) SetFiles(files map[string]string) {
-	ctx.files = files
-}
-
-// SetCancelled sets if the context is cancelled or not.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  ctx.SetCancelled(true)
-func (ctx *MockContext) SetCancelled(cancelled bool) {
-	ctx.cancelled = cancelled
-}
-
-// OutputPaths returns the registered output paths.
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  outputPaths := ctx.OutputPaths()
-func (ctx MockContext) OutputPaths() []string {
-	return ctx.outputPaths
-}
-
-// SetLogger sets the logger.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  ctx.SetLogger(zap.NewNop())
-func (ctx *MockContext) SetLogger(logger *zap.Logger) {
-	ctx.logger = logger
-}
-
-// SetEchoContext sets the echo.Context.
-//
-//  ctx := &api.MockContext{Context: &api.Context{}}
-//  ctx.setEchoContext(c)
-func (ctx *MockContext) SetEchoContext(c echo.Context) {
-	ctx.Context.echoCtx = c
-}

pkg/modules/api/context_test.go

@@ -334,99 +334,3 @@ func TestContext_OutputFilename(t *testing.T) {
 		}
 	}
 }
-
-func TestMockContext_SetDirPath(t *testing.T) {
-	mock := &MockContext{&Context{}}
-	mock.SetDirPath("/foo")
-
-	actual := mock.dirPath
-	expect := "/foo"
-
-	if actual != expect {
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
-	}
-}
-
-func TestMockContext_SetValues(t *testing.T) {
-	mock := &MockContext{&Context{}}
-	mock.SetValues(map[string][]string{
-		"foo": {"foo"},
-	})
-
-	actual := mock.values
-	expect := map[string][]string{
-		"foo": {"foo"},
-	}
-
-	if !reflect.DeepEqual(actual, expect) {
-		t.Errorf("expected %+v but got: %+v", expect, actual)
-	}
-}
-
-func TestMockContext_SetFiles(t *testing.T) {
-	mock := &MockContext{&Context{}}
-	mock.SetFiles(map[string]string{
-		"foo": "/foo",
-	})
-
-	actual := mock.files
-	expect := map[string]string{
-		"foo": "/foo",
-	}
-
-	if !reflect.DeepEqual(actual, expect) {
-		t.Errorf("expected %+v but got: %+v", expect, actual)
-	}
-}
-
-func TestMockContext_SetCancelled(t *testing.T) {
-	mock := &MockContext{&Context{}}
-	mock.SetCancelled(true)
-
-	actual := mock.cancelled
-
-	if !actual {
-		t.Errorf("expected %t but got %t", true, actual)
-	}
-}
-
-func TestMockContext_OutputPaths(t *testing.T) {
-	mock := MockContext{
-		&Context{
-			outputPaths: []string{"/foo"},
-		},
-	}
-
-	actual := mock.OutputPaths()
-	expect := []string{"/foo"}
-
-	if !reflect.DeepEqual(actual, expect) {
-		t.Errorf("expected %+v but got: %+v", expect, actual)
-	}
-}
-
-func TestMockContext_SetLogger(t *testing.T) {
-	mock := MockContext{&Context{}}
-
-	expect := zap.NewNop()
-	mock.SetLogger(expect)
-
-	actual := mock.logger
-
-	if actual != expect {
-		t.Errorf("expected %v but got %v", expect, actual)
-	}
-}
-
-func TestMockContext_SetEchoContext(t *testing.T) {
-	mock := MockContext{&Context{}}
-
-	expect := echo.New().NewContext(nil, nil)
-	mock.SetEchoContext(expect)
-
-	actual := mock.echoCtx
-
-	if actual != expect {
-		t.Errorf("expected %v but got %v", expect, actual)
-	}
-}

pkg/modules/api/errors.go

@@ -52,15 +52,15 @@ func (w sentinelWrappedError) HTTPError() (int, string) {
 // will be displayed in a log, while the SentinelHTTPError will be sent in the
 // response.
 //
-//  return api.WrapError(
+//	return api.WrapError(
-//    // This first error will be logged.
+//	  // This first error will be logged.
-//    fmt.Errorf("my action: %w", err),
+//	  fmt.Errorf("my action: %w", err),
-//    // The HTTP error will be sent as a response.
+//	  // The HTTP error will be sent as a response.
-//    api.NewSentinelHTTPError(
+//	  api.NewSentinelHTTPError(
-//      http.StatusForbidden,
+//	    http.StatusForbidden,
-//      "Hey, you did something wrong!"
+//	    "Hey, you did something wrong!"
-//    ),
+//	  ),
-//  )
+//	)
 func WrapError(err error, sentinel SentinelHTTPError) error {
 	return sentinelWrappedError{
 		error:    err,

pkg/modules/api/formdata.go

@@ -2,8 +2,8 @@ package api
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/http"
+	"os"
 	"path/filepath"
 	"sort"
 	"strconv"
@@ -16,7 +16,7 @@ import (
 // FormData is a helper for validating and hydrating values from a
 // "multipart/form-data" request.
 //
-//  form := ctx.FormData()
+//	form := ctx.FormData()
 type FormData struct {
 	values map[string][]string
 	files  map[string]string
@@ -27,11 +27,11 @@ type FormData struct {
 // SentinelHTTPError (status code 400, errors' details as message) wrapped
 // inside.
 //
-//  var foo string
+//	var foo string
 //
-//  err := ctx.FormData().
+//	err := ctx.FormData().
-//     MandatoryString("foo", &foo, "bar").
+//	   MandatoryString("foo", &foo, "bar").
-//     Validate()
+//	   Validate()
 func (form FormData) Validate() error {
 	if form.errors == nil {
 		return nil
@@ -45,9 +45,9 @@ func (form FormData) Validate() error {
 
 // String binds a form data value to a string variable.
 //
-//  var foo string
+//	var foo string
 //
-//  ctx.FormData().String("foo", &foo, "bar")
+//	ctx.FormData().String("foo", &foo, "bar")
 func (form *FormData) String(key string, target *string, defaultValue string) *FormData {
 	return form.mustValue(key, target, defaultValue)
 }
@@ -55,9 +55,9 @@ func (form *FormData) String(key string, target *string, defaultValue string) *F
 // MandatoryString binds a form data value to a string variable. It populates
 // an error if the value is empty or the "key" does not exist.
 //
-//  var foo string
+//	var foo string
 //
-//  ctx.FormData().MandatoryString("foo", &foo)
+//	ctx.FormData().MandatoryString("foo", &foo)
 func (form *FormData) MandatoryString(key string, target *string) *FormData {
 	return form.mustMandatoryValue(key, target)
 }
@@ -65,9 +65,9 @@ func (form *FormData) MandatoryString(key string, target *string) *FormData {
 // Bool binds a form data value to a bool variable. It populates an error if
 // the value is not bool.
 //
-//  var foo bool
+//	var foo bool
 //
-//  ctx.FormData().Bool("foo", &foo, true)
+//	ctx.FormData().Bool("foo", &foo, true)
 func (form *FormData) Bool(key string, target *bool, defaultValue bool) *FormData {
 	return form.mustValue(key, target, defaultValue)
 }
@@ -75,9 +75,9 @@ func (form *FormData) Bool(key string, target *bool, defaultValue bool) *FormDat
 // MandatoryBool binds a form data value 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
+//	var foo bool
 //
-//  ctx.FormData().MandatoryBool("foo", &foo)
+//	ctx.FormData().MandatoryBool("foo", &foo)
 func (form *FormData) MandatoryBool(key string, target *bool) *FormData {
 	return form.mustMandatoryValue(key, target)
 }
@@ -85,9 +85,9 @@ func (form *FormData) MandatoryBool(key string, target *bool) *FormData {
 // Int binds a form data value to an int variable. It populates an error if the
 // value is not int.
 //
-//  var foo int
+//	var foo int
 //
-//  ctx.FormData().Int("foo", &foo, 2)
+//	ctx.FormData().Int("foo", &foo, 2)
 func (form *FormData) Int(key string, target *int, defaultValue int) *FormData {
 	return form.mustValue(key, target, defaultValue)
 }
@@ -95,9 +95,9 @@ func (form *FormData) Int(key string, target *int, defaultValue int) *FormData {
 // MandatoryInt binds a form data value 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
+//	var foo int
 //
-//  ctx.FormData().MandatoryInt("foo", &foo)
+//	ctx.FormData().MandatoryInt("foo", &foo)
 func (form *FormData) MandatoryInt(key string, target *int) *FormData {
 	return form.mustMandatoryValue(key, target)
 }
@@ -105,9 +105,9 @@ func (form *FormData) MandatoryInt(key string, target *int) *FormData {
 // Float64 binds a form data value to a float64 variable. It populates an error
 // if the value is not float64.
 //
-//  var foo float64
+//	var foo float64
 //
-//  ctx.FormData().Float64("foo", &foo, 2.0)
+//	ctx.FormData().Float64("foo", &foo, 2.0)
 func (form *FormData) Float64(key string, target *float64, defaultValue float64) *FormData {
 	return form.mustValue(key, target, defaultValue)
 }
@@ -115,9 +115,9 @@ func (form *FormData) Float64(key string, target *float64, defaultValue float64)
 // MandatoryFloat64 binds a form data value to a float64 variable. It populates
 // an error if the is not float64, is empty, or the "key" does not exist.
 //
-//  var foo float64
+//	var foo float64
 //
-//  ctx.FormData().MandatoryFloat64("foo", &foo)
+//	ctx.FormData().MandatoryFloat64("foo", &foo)
 func (form *FormData) MandatoryFloat64(key string, target *float64) *FormData {
 	return form.mustMandatoryValue(key, target)
 }
@@ -125,9 +125,9 @@ func (form *FormData) MandatoryFloat64(key string, target *float64) *FormData {
 // Duration binds a form data value to a time.Duration variable. It populates
 // an error if the form data value is not time.Duration.
 //
-//  var foo time.Duration
+//	var foo time.Duration
 //
-//  ctx.FormData().Duration("foo", &foo, time.Duration(2) * time.Second)
+//	ctx.FormData().Duration("foo", &foo, time.Duration(2) * time.Second)
 func (form *FormData) Duration(key string, target *time.Duration, defaultValue time.Duration) *FormData {
 	return form.mustValue(key, target, defaultValue)
 }
@@ -136,31 +136,31 @@ func (form *FormData) Duration(key string, target *time.Duration, defaultValue t
 // populates an error if the value is not time.Duration, is empty, or the "key"
 // does not exist.
 //
-//  var foo time.Duration
+//	var foo time.Duration
 //
-//  ctx.FormData().MandatoryDuration("foo", &foo)
+//	ctx.FormData().MandatoryDuration("foo", &foo)
 func (form *FormData) MandatoryDuration(key string, target *time.Duration) *FormData {
 	return form.mustMandatoryValue(key, target)
 }
 
 // Custom helps to define a custom binding function for a form data value.
 //
-//  var foo map[string]string
+//	var foo map[string]string
 //
-//  ctx.FormData().Custom("foo", func(value string) error {
+//	ctx.FormData().Custom("foo", func(value string) error {
-//    if value == "" {
+//	  if value == "" {
-//      foo = "bar"
+//	    foo = "bar"
 //
-//      return nil
+//	    return nil
-//    }
+//	  }
 //
-//    err := json.Unmarshal([]byte(value), &foo)
+//	  err := json.Unmarshal([]byte(value), &foo)
-//    if err != nil {
+//	  if err != nil {
-//      return fmt.Errorf("unmarshal foo: %w", err)
+//	    return fmt.Errorf("unmarshal foo: %w", err)
-//    }
+//	  }
 //
-//    return nil
+//	  return nil
-//  })
+//	})
 func (form *FormData) Custom(key string, assign func(value string) error) *FormData {
 	var value string
 	form.mustValue(key, &value, "")
@@ -179,16 +179,16 @@ func (form *FormData) Custom(key string, assign func(value string) error) *FormD
 // value. It populates an error if the value is empty or the "key" does not
 // exist.
 //
-//  var foo map[string]string
+//	var foo map[string]string
 //
-//  ctx.FormData().MandatoryCustom("foo", func(value string) error {
+//	ctx.FormData().MandatoryCustom("foo", func(value string) error {
-//    err := json.Unmarshal([]byte(value), &foo)
+//	  err := json.Unmarshal([]byte(value), &foo)
-//    if err != nil {
+//	  if err != nil {
-//      return fmt.Errorf("unmarshal foo: %w", err)
+//	    return fmt.Errorf("unmarshal foo: %w", err)
-//    }
+//	  }
 //
-//    return nil
+//	  return nil
-//  })
+//	})
 func (form *FormData) MandatoryCustom(key string, assign func(value string) error) *FormData {
 	var value string
 	form.mustMandatoryValue(key, &value)
@@ -209,9 +209,9 @@ func (form *FormData) MandatoryCustom(key string, assign func(value string) erro
 
 // Path binds the absolute path of a form data file to a string variable.
 //
-//  var path string
+//	var path string
 //
-//  ctx.FormData().Path("foo.txt", &path)
+//	ctx.FormData().Path("foo.txt", &path)
 func (form *FormData) Path(filename string, target *string) *FormData {
 	return form.path(filename, target)
 }
@@ -219,18 +219,18 @@ func (form *FormData) Path(filename string, target *string) *FormData {
 // MandatoryPath binds the absolute path ofa  form data file to a string
 // variable. It populates an error if the file does not exist.
 //
-//  var path string
+//	var path string
 //
-//  ctx.FormData().MandatoryPath("foo.txt", &path)
+//	ctx.FormData().MandatoryPath("foo.txt", &path)
 func (form *FormData) MandatoryPath(filename string, target *string) *FormData {
 	return form.mandatoryPath(filename, target)
 }
 
 // Content binds the content of a form data file to a string variable.
 //
-//  var content string
+//	var content string
 //
-//  ctx.FormData().Content("foo.txt", &content, "bar")
+//	ctx.FormData().Content("foo.txt", &content, "bar")
 func (form *FormData) Content(filename string, target *string, defaultValue string) *FormData {
 	var path string
 	form.path(filename, &path)
@@ -247,9 +247,9 @@ func (form *FormData) Content(filename string, target *string, defaultValue stri
 // MandatoryContent binds the content of a form data file to a string variable.
 // It populates an error if the file does not exist.
 //
-//  var content string
+//	var content string
 //
-//  ctx.FormData().MandatoryContent("foo.txt", &content)
+//	ctx.FormData().MandatoryContent("foo.txt", &content)
 func (form *FormData) MandatoryContent(filename string, target *string) *FormData {
 	var path string
 	form.mandatoryPath(filename, &path)
@@ -264,9 +264,9 @@ func (form *FormData) MandatoryContent(filename string, target *string) *FormDat
 // Paths binds the absolute paths of form data files, according to a list of
 // file extensions, to a string slice variable.
 //
-//  var paths []string
+//	var paths []string
 //
-//  ctx.FormData().Paths([]string{".txt"}, &paths)
+//	ctx.FormData().Paths([]string{".txt"}, &paths)
 func (form *FormData) Paths(extensions []string, target *[]string) *FormData {
 	return form.paths(extensions, target)
 }
@@ -275,9 +275,9 @@ func (form *FormData) Paths(extensions []string, target *[]string) *FormData {
 // list of file extensions, to a string slice variable. It populates an error
 // if there is no file for given file extensions.
 //
-//  var paths []string
+//	var paths []string
 //
-//  ctx.FormData().MandatoryPaths([]string{".txt"}, &paths)
+//	ctx.FormData().MandatoryPaths([]string{".txt"}, &paths)
 func (form *FormData) MandatoryPaths(extensions []string, target *[]string) *FormData {
 	form.paths(extensions, target)
 
@@ -426,7 +426,7 @@ func (form *FormData) mandatoryPath(filename string, target *string) *FormData {
 // readFile binds the content of a file to a string variable. It populates an
 // error if it fails to read the file content.
 func (form *FormData) readFile(path, filename string, target *string) *FormData {
-	b, err := ioutil.ReadFile(path)
+	b, err := os.ReadFile(path)
 	if err != nil {
 		form.append(
 			fmt.Errorf("form file '%s' is invalid (%w)", filename, err),

pkg/modules/api/middlewares.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"strings"
 	"time"
 
 	"github.com/google/uuid"
@@ -56,7 +57,7 @@ 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.
 //
-//  startTime := c.Get("startTime").(time.Time)
+//	startTime := c.Get("startTime").(time.Time)
 func latencyMiddleware() echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
@@ -74,14 +75,14 @@ func latencyMiddleware() echo.MiddlewareFunc {
 // Its value may be used to skip a middleware execution based on a request
 // URI.
 //
-//  rootPath := c.Get("rootPath").(string)
+//	rootPath := c.Get("rootPath").(string)
-//  healthURI := fmt.Sprintf("%s/health", rootPath)
+//	healthURI := fmt.Sprintf("%s/health", rootPath)
 //
-//  // Skip the middleware if health check URI.
+//	// Skip the middleware if health check URI.
-//  if c.Request().RequestURI == healthURI {
+//	if c.Request().RequestURI == healthURI {
-//    // Call the next middleware in the chain.
+//	  // Call the next middleware in the chain.
-//    return next(c)
+//	  return next(c)
-//  }
+//	}
 func rootPathMiddleware(rootPath string) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
@@ -97,8 +98,8 @@ func rootPathMiddleware(rootPath string) echo.MiddlewareFunc {
 // "trace". Its value is either retrieved from the trace header or generated if
 // the header is not present / its value is empty.
 //
-//  trace := c.Get("trace").(string)
+//	trace := c.Get("trace").(string)
-//  traceHeader := c.Get("traceHeader").(string).
+//	traceHeader := c.Get("traceHeader").(string).
 func traceMiddleware(header string) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
@@ -119,38 +120,26 @@ func traceMiddleware(header string) echo.MiddlewareFunc {
 	}
 }
 
-// timeoutsMiddleware sets the read, process and write timeouts in the
-// echo.Context under "readTimeout", "processTimeout" and "writeTimeout".
-//
-//  readTimeout := c.Get("readTimeout").(time.Duration)
-//  processTimeout := c.Get("processTimeout").(time.Duration)
-//  writeTimeout := c.Get("writeTimeout").(time.Duration)
-func timeoutsMiddleware(readTimeout, processTimeout, writeTimeout time.Duration) echo.MiddlewareFunc {
-	return func(next echo.HandlerFunc) echo.HandlerFunc {
-		return func(c echo.Context) error {
-			c.Set("readTimeout", readTimeout)
-			c.Set("processTimeout", processTimeout)
-			c.Set("writeTimeout", writeTimeout)
-
-			// Call the next middleware in the chain.
-			return next(c)
-		}
-	}
-}
-
 // loggerMiddleware sets the logger in the echo.Context under "logger" and logs
 // a synchronous request result.
 //
-//  logger := c.Get("logger").(*zap.Logger)
+//	logger := c.Get("logger").(*zap.Logger)
 func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			startTime := c.Get("startTime").(time.Time)
 			trace := c.Get("trace").(string)
+			rootPath := c.Get("rootPath").(string)
 
 			// Create the request logger and add it to our locals.
 			reqLogger := logger.With(zap.String("trace", trace))
-			c.Set("logger", reqLogger)
+			c.Set("logger", reqLogger.Named(func() string {
+				return strings.ReplaceAll(
+					strings.ReplaceAll(c.Request().URL.Path, rootPath, ""),
+					"/",
+					"",
+				)
+			}()))
 
 			// Call the next middleware in the chain.
 			err := next(c)
@@ -159,7 +148,6 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 			}
 
 			for _, path := range disableLoggingForPaths {
-				rootPath := c.Get("rootPath").(string)
 				URI := fmt.Sprintf("%s%s", rootPath, path)
 
 				if c.Request().RequestURI == URI {
@@ -209,16 +197,16 @@ func loggerMiddleware(logger *zap.Logger, disableLoggingForPaths []string) echo.
 // and "cancel". If the process is synchronous, it also handles the result of a
 // "multipart/form-data" request.
 //
-//  ctx := c.Get("context").(*api.Context)
+//	ctx := c.Get("context").(*api.Context)
-//  cancel := c.Get("cancel").(context.CancelFunc)
+//	cancel := c.Get("cancel").(context.CancelFunc)
-func contextMiddleware(processTimeout time.Duration) echo.MiddlewareFunc {
+func contextMiddleware(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, processTimeout)
+			ctx, cancel, err := newContext(c, logger, timeout)
 			if err != nil {
 				cancel()
 

pkg/modules/api/middlewares_test.go

@@ -222,47 +222,6 @@ func TestTraceMiddleware(t *testing.T) {
 	}
 }
 
-func TestTimeoutsMiddleware(t *testing.T) {
-	recorder := httptest.NewRecorder()
-	request := httptest.NewRequest(http.MethodGet, "/foo", nil)
-
-	srv := echo.New()
-	srv.HideBanner = true
-	srv.HidePort = true
-
-	c := srv.NewContext(request, recorder)
-
-	expectReadTimeout := time.Duration(1) * time.Second
-	expectProcessTimeout := time.Duration(2) * time.Second
-	expectWriteTimeout := time.Duration(3) * time.Second
-
-	err := timeoutsMiddleware(expectReadTimeout, expectProcessTimeout, expectWriteTimeout)(
-		func(c echo.Context) error {
-			return nil
-		},
-	)(c)
-
-	if err != nil {
-		t.Fatalf("expected no error but got: %v", err)
-	}
-
-	actualReadTimeout := c.Get("readTimeout").(time.Duration)
-	actualProcessTimeout := c.Get("processTimeout").(time.Duration)
-	actualWriteTimeout := c.Get("writeTimeout").(time.Duration)
-
-	if actualReadTimeout != expectReadTimeout {
-		t.Errorf("expected '%s' but got '%s", expectReadTimeout, actualReadTimeout)
-	}
-
-	if actualProcessTimeout != expectProcessTimeout {
-		t.Errorf("expected '%s' but got '%s", expectProcessTimeout, actualProcessTimeout)
-	}
-
-	if actualWriteTimeout != expectWriteTimeout {
-		t.Errorf("expected '%s' but got '%s", actualWriteTimeout, expectWriteTimeout)
-	}
-}
-
 func TestLoggerMiddleware(t *testing.T) {
 	for i, tc := range []struct {
 		request     *http.Request

pkg/modules/api/mocks.go

@@ -0,0 +1,75 @@
+package api
+
+import (
+	"github.com/labstack/echo/v4"
+	"go.uber.org/zap"
+)
+
+// ContextMock is a helper for tests.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+type ContextMock struct {
+	*Context
+}
+
+// SetDirPath sets the context's working directory path.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetDirPath("/foo")
+func (ctx *ContextMock) SetDirPath(path string) {
+	ctx.dirPath = path
+}
+
+// SetValues sets the values.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetValues(map[string][]string{
+//	  "url": {
+//	    "foo",
+//	  },
+//	})
+func (ctx *ContextMock) SetValues(values map[string][]string) {
+	ctx.values = values
+}
+
+// SetFiles sets the files.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetFiles(map[string]string{
+//	  "foo": "/foo",
+//	})
+func (ctx *ContextMock) SetFiles(files map[string]string) {
+	ctx.files = files
+}
+
+// SetCancelled sets if the context is cancelled or not.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetCancelled(true)
+func (ctx *ContextMock) SetCancelled(cancelled bool) {
+	ctx.cancelled = cancelled
+}
+
+// OutputPaths returns the registered output paths.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	outputPaths := ctx.OutputPaths()
+func (ctx ContextMock) OutputPaths() []string {
+	return ctx.outputPaths
+}
+
+// SetLogger sets the logger.
+//
+//	ctx := &api.ContextMock{Context: &api.Context{}}
+//	ctx.SetLogger(zap.NewNop())
+func (ctx *ContextMock) SetLogger(logger *zap.Logger) {
+	ctx.logger = logger
+}
+
+// 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
+}

pkg/modules/api/mocks_test.go

@@ -0,0 +1,105 @@
+package api
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/labstack/echo/v4"
+	"go.uber.org/zap"
+)
+
+func TestContextMock_SetDirPath(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{
+		"foo": {"foo"},
+	})
+
+	actual := mock.values
+	expect := map[string][]string{
+		"foo": {"foo"},
+	}
+
+	if !reflect.DeepEqual(actual, expect) {
+		t.Errorf("expected %+v but got: %+v", expect, actual)
+	}
+}
+
+func TestContextMock_SetFiles(t *testing.T) {
+	mock := &ContextMock{&Context{}}
+	mock.SetFiles(map[string]string{
+		"foo": "/foo",
+	})
+
+	actual := mock.files
+	expect := map[string]string{
+		"foo": "/foo",
+	}
+
+	if !reflect.DeepEqual(actual, expect) {
+		t.Errorf("expected %+v but got: %+v", expect, actual)
+	}
+}
+
+func TestContextMock_SetCancelled(t *testing.T) {
+	mock := &ContextMock{&Context{}}
+	mock.SetCancelled(true)
+
+	actual := mock.cancelled
+
+	if !actual {
+		t.Errorf("expected %t but got %t", true, actual)
+	}
+}
+
+func TestContextMock_OutputPaths(t *testing.T) {
+	mock := ContextMock{
+		&Context{
+			outputPaths: []string{"/foo"},
+		},
+	}
+
+	actual := mock.OutputPaths()
+	expect := []string{"/foo"}
+
+	if !reflect.DeepEqual(actual, expect) {
+		t.Errorf("expected %+v but got: %+v", expect, actual)
+	}
+}
+
+func TestContextMock_SetLogger(t *testing.T) {
+	mock := ContextMock{&Context{}}
+
+	expect := zap.NewNop()
+	mock.SetLogger(expect)
+
+	actual := mock.logger
+
+	if actual != expect {
+		t.Errorf("expected %v but got %v", expect, actual)
+	}
+}
+
+func TestContextMock_SetEchoContext(t *testing.T) {
+	mock := ContextMock{&Context{}}
+
+	expect := echo.New().NewContext(nil, nil)
+	mock.SetEchoContext(expect)
+
+	actual := mock.echoCtx
+
+	if actual != expect {
+		t.Errorf("expected %v but got %v", expect, actual)
+	}
+}

pkg/modules/chromium/chromium.go

@@ -1,10 +1,10 @@
 package chromium
 
 import (
+	"bufio"
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"regexp"
 	"strings"
@@ -66,9 +66,11 @@ type Chromium struct {
 	engine                   gotenberg.PDFEngine
 	userAgent                string
 	incognito                bool
+	allowInsecureLocalhost   bool
 	ignoreCertificateErrors  bool
 	disableWebSecurity       bool
 	allowFileAccessFromFiles bool
+	hostResolverRules        string
 	proxyServer              string
 	allowList                *regexp.Regexp
 	denyList                 *regexp.Regexp
@@ -85,7 +87,7 @@ type LinkTag struct {
 
 // ScriptTag represents an HTML <script> element.
 type ScriptTag struct {
-	// Src is the "src" attribute of the HTML <link> element.
+	// Src is the "src" attribute of the HTML <script> element.
 	// Required.
 	Src string `json:"src"`
 }
@@ -250,9 +252,11 @@ func (mod Chromium) Descriptor() gotenberg.ModuleDescriptor {
 			fs := flag.NewFlagSet("chromium", flag.ExitOnError)
 			fs.String("chromium-user-agent", "", "Override the default User-Agent header")
 			fs.Bool("chromium-incognito", false, "Start Chromium with incognito mode")
+			fs.Bool("chromium-allow-insecure-localhost", false, "Ignore TLS/SSL errors on localhost")
 			fs.Bool("chromium-ignore-certificate-errors", false, "Ignore the certificate errors")
 			fs.Bool("chromium-disable-web-security", false, "Don't enforce the same-origin policy")
 			fs.Bool("chromium-allow-file-access-from-files", false, "Allow file:// URIs to read other file:// URIs")
+			fs.String("chromium-host-resolver-rules", "", "Set custom mappings to the host resolver")
 			fs.String("chromium-proxy-server", "", "Set the outbound proxy server; this switch only affects HTTP and HTTPS requests")
 			fs.String("chromium-allow-list", "", "Set the allowed URLs for Chromium using a regular expression")
 			fs.String("chromium-deny-list", "^file:///[^tmp].*", "Set the denied URLs for Chromium using a regular expression")
@@ -274,9 +278,11 @@ func (mod Chromium) Descriptor() gotenberg.ModuleDescriptor {
 func (mod *Chromium) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
 	mod.userAgent = flags.MustString("chromium-user-agent")
+	mod.allowInsecureLocalhost = flags.MustBool("chromium-allow-insecure-localhost")
 	mod.ignoreCertificateErrors = flags.MustBool("chromium-ignore-certificate-errors")
 	mod.disableWebSecurity = flags.MustBool("chromium-disable-web-security")
 	mod.allowFileAccessFromFiles = flags.MustBool("chromium-allow-file-access-from-files")
+	mod.hostResolverRules = flags.MustString("chromium-host-resolver-rules")
 	mod.proxyServer = flags.MustString("chromium-proxy-server")
 	mod.allowList = flags.MustRegexp("chromium-allow-list")
 	mod.denyList = flags.MustRegexp("chromium-deny-list")
@@ -355,7 +361,7 @@ func (mod Chromium) Routes() ([]api.Route, error) {
 // drastically. In such a scenario, the given context may also be done before
 // the end of the conversion.
 func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath string, options Options) error {
-	debug := debugLogger{logger: logger.Named("chromium.debug")}
+	debug := debugLogger{logger: logger.Named("browser")}
 	userProfileDirPath := gotenberg.NewDirPath()
 
 	args := append(chromedp.DefaultExecAllocatorOptions[:],
@@ -382,6 +388,11 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 		args = append(args, chromedp.Flag("incognito", mod.incognito))
 	}
 
+	if mod.allowInsecureLocalhost {
+		// See https://github.com/gotenberg/gotenberg/issues/488.
+		args = append(args, chromedp.Flag("allow-insecure-localhost", true))
+	}
+
 	if mod.ignoreCertificateErrors {
 		args = append(args, chromedp.IgnoreCertErrors)
 	}
@@ -395,6 +406,11 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 		args = append(args, chromedp.Flag("allow-file-access-from-files", true))
 	}
 
+	if mod.hostResolverRules != "" {
+		// See https://github.com/gotenberg/gotenberg/issues/488.
+		args = append(args, chromedp.Flag("host-resolver-rules", mod.hostResolverRules))
+	}
+
 	if mod.proxyServer != "" {
 		// See https://github.com/gotenberg/gotenberg/issues/376.
 		args = append(args, chromedp.ProxyServer(mod.proxyServer))
@@ -404,6 +420,14 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 		args = append(args, chromedp.UserAgent(options.UserAgent))
 	}
 
+	// See https://github.com/gotenberg/gotenberg/issues/524.
+	deadline, ok := ctx.Deadline()
+	if !ok {
+		return errors.New("context has no deadline")
+	}
+
+	args = append(args, chromedp.WSURLReadTimeout(time.Until(deadline)))
+
 	allocatorCtx, cancel := chromedp.NewExecAllocator(ctx, args...)
 	defer cancel()
 
@@ -426,7 +450,7 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 		consoleExceptionsMu sync.RWMutex
 	)
 
-	printToPDF := func(URL string, options Options, result *[]byte) chromedp.Tasks {
+	printToPDF := func(URL string, options Options, outputPath string) chromedp.Tasks {
 		// We validate the underlying requests against our allow / deny lists.
 		// If a request does not pass the validation, we make it fail.
 		listenForEventRequestPaused(taskCtx, logger, mod.allowList, mod.denyList)
@@ -732,6 +756,7 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 			}),
 			chromedp.ActionFunc(func(ctx context.Context) error {
 				printToPDF := page.PrintToPDF().
+					WithTransferMode(page.PrintToPDFTransferModeReturnAsStream).
 					WithLandscape(options.Landscape).
 					WithPrintBackground(options.PrintBackground).
 					WithScale(options.Scale).
@@ -741,7 +766,6 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 					WithMarginBottom(options.MarginBottom).
 					WithMarginLeft(options.MarginLeft).
 					WithMarginRight(options.MarginRight).
-					WithIgnoreInvalidPageRanges(false).
 					WithPageRanges(options.PageRanges).
 					WithDisplayHeaderFooter(true).
 					WithHeaderTemplate(options.HeaderTemplate).
@@ -750,12 +774,44 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 
 				logger.Debug(fmt.Sprintf("print to PDF with: %+v", printToPDF))
 
-				data, _, err := printToPDF.Do(ctx)
+				_, stream, err := printToPDF.Do(ctx)
 				if err != nil {
 					return fmt.Errorf("print to PDF: %w", err)
 				}
 
-				*result = data
+				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, 0600)
+				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
 			}),
@@ -766,8 +822,7 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 	activeInstancesCount += 1
 	activeInstancesCountMu.Unlock()
 
-	var buffer []byte
+	err := chromedp.Run(taskCtx, printToPDF(URL, options, outputPath))
-	err := chromedp.Run(taskCtx, printToPDF(URL, options, &buffer))
 
 	activeInstancesCountMu.Lock()
 	activeInstancesCount -= 1
@@ -809,11 +864,6 @@ func (mod Chromium) PDF(ctx context.Context, logger *zap.Logger, URL, outputPath
 		return fmt.Errorf("%v: %w", consoleExceptions, ErrConsoleExceptions)
 	}
 
-	err = ioutil.WriteFile(outputPath, buffer, 0600)
-	if err != nil {
-		return fmt.Errorf("write result to output path: %w", err)
-	}
-
 	return nil
 }
 

pkg/modules/chromium/chromium_test.go

@@ -3,7 +3,6 @@ package chromium
 import (
 	"context"
 	"errors"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"regexp"
@@ -176,11 +175,11 @@ func TestChromium_Validate(t *testing.T) {
 func TestChromium_Metrics(t *testing.T) {
 	metrics, err := new(Chromium).Metrics()
 	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
+		t.Fatalf("expected no error but got: %v", err)
 	}
 
 	if len(metrics) != 1 {
-		t.Errorf("expected %d metrics, but got %d", 1, len(metrics))
+		t.Fatalf("expected %d metrics, but got %d", 1, len(metrics))
 	}
 
 	actual := metrics[0].Read()
@@ -225,16 +224,19 @@ func TestChromium_Routes(t *testing.T) {
 }
 
 func TestChromium_PDF(t *testing.T) {
-	for i, tc := range []struct {
+	for _, tc := range []struct {
+		name                     string
 		timeout                  time.Duration
 		cancel                   context.CancelFunc
 		URL                      string
 		options                  Options
 		userAgent                string
 		incognito                bool
+		allowInsecureLocalhost   bool
 		ignoreCertificateErrors  bool
 		disableWebSecurity       bool
 		allowFileAccessFromFiles bool
+		hostResolverRules        string
 		proxyServer              string
 		allowList                *regexp.Regexp
 		denyList                 *regexp.Regexp
@@ -242,34 +244,51 @@ func TestChromium_PDF(t *testing.T) {
 		expectErr                bool
 	}{
 		{
+			name:      "context has no deadline",
+			URL:       "file:///tests/test/testdata/chromium/html/sample1/index.html",
+			expectErr: true,
+		},
+		{
+			name:      "URL does not match the expression from the allowed list",
+			timeout:   time.Duration(60) * time.Second,
 			URL:       "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			allowList: regexp.MustCompile("file:///tmp/*"),
 			expectErr: true,
 		},
 		{
+			name:      "URL does not match the expression from the denied list",
+			timeout:   time.Duration(60) * time.Second,
 			URL:       "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			denyList:  regexp.MustCompile("file:///tests/*"),
 			expectErr: true,
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with user agent",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				UserAgent: "foo",
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample10/index.html",
+			name:    "fail on console exceptions",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample10/index.html",
 			options: Options{
 				FailOnConsoleExceptions: true,
 			},
 			expectErr: true,
 		},
 		{
+			name:              "disable JavaScript",
+			timeout:           time.Duration(60) * time.Second,
 			URL:               "file:///tests/test/testdata/chromium/html/sample9/index.html",
 			disableJavaScript: true,
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with extra HTTP headers",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				ExtraHTTPHeaders: map[string]string{
 					"foo": "bar",
@@ -277,7 +296,9 @@ func TestChromium_PDF(t *testing.T) {
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample11/index.html",
+			name:    "with extra link tags",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample11/index.html",
 			options: Options{
 				ExtraLinkTags: []LinkTag{
 					{
@@ -290,26 +311,34 @@ func TestChromium_PDF(t *testing.T) {
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample8/index.html",
+			name:    "with invalid emulated media type",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample8/index.html",
 			options: Options{
 				EmulatedMediaType: "foo",
 			},
 			expectErr: true,
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample8/index.html",
+			name:    "with screen emulated media type",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample8/index.html",
 			options: Options{
 				EmulatedMediaType: "screen",
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample8/index.html",
+			name:    "with print emulated media type",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample8/index.html",
 			options: Options{
 				EmulatedMediaType: "print",
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample11/index.html",
+			name:    "with extra script tags",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample11/index.html",
 			options: Options{
 				ExtraScriptTags: []ScriptTag{
 					{
@@ -319,12 +348,15 @@ func TestChromium_PDF(t *testing.T) {
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with wait delay",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				WaitDelay: time.Duration(1) * time.Nanosecond,
 			},
 		},
 		{
+			name:    "with invalid wait window status",
 			timeout: time.Duration(3) * time.Second,
 			URL:     "file:///tests/test/testdata/chromium/html/sample2/index.html",
 			options: Options{
@@ -333,6 +365,7 @@ func TestChromium_PDF(t *testing.T) {
 			expectErr: true,
 		},
 		{
+			name:    "with wait window status",
 			timeout: time.Duration(3) * time.Second,
 			URL:     "file:///tests/test/testdata/chromium/html/sample2/index.html",
 			options: Options{
@@ -340,6 +373,7 @@ func TestChromium_PDF(t *testing.T) {
 			},
 		},
 		{
+			name:    "with wait for expression that should not happen",
 			timeout: time.Duration(3) * time.Second,
 			URL:     "file:///tests/test/testdata/chromium/html/sample2/index.html",
 			options: Options{
@@ -348,6 +382,7 @@ func TestChromium_PDF(t *testing.T) {
 			expectErr: true,
 		},
 		{
+			name:    "with valid wait for expression",
 			timeout: time.Duration(3) * time.Second,
 			URL:     "file:///tests/test/testdata/chromium/html/sample2/index.html",
 			options: Options{
@@ -355,51 +390,69 @@ func TestChromium_PDF(t *testing.T) {
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with invalid wait for expression",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				WaitForExpression: "return undefined",
 			},
 			expectErr: true,
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with too big margin bottom",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				MarginBottom: 100,
 			},
 			expectErr: true,
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with invalid page ranges",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				PageRanges: "foo",
 			},
 			expectErr: true,
 		},
 		{
+			name:                     "with a lot of options",
+			timeout:                  time.Duration(60) * time.Second,
 			URL:                      "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			userAgent:                "foo",
 			incognito:                true,
 			ignoreCertificateErrors:  true,
+			allowInsecureLocalhost:   true,
 			disableWebSecurity:       true,
 			allowFileAccessFromFiles: true,
+			hostResolverRules:        "foo",
 			proxyServer:              "foo",
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample1/index.html",
+			name:    "with file using local and remote assets",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample1/index.html",
 		},
 		{
+			name:      "URL does match the expression from the allowed list",
+			timeout:   time.Duration(60) * time.Second,
 			URL:       "file:///tests/test/testdata/chromium/html/sample3/index.html",
 			allowList: regexp.MustCompile("file:///tests/*"),
 		},
 		{
+			name:     "URL does match the expression from the denied list",
+			timeout:  time.Duration(60) * time.Second,
 			URL:      "file:///tests/test/testdata/chromium/html/sample3/index.html",
 			denyList: regexp.MustCompile("file:///etc/*"),
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample4/index.html",
+			name:    "with custom header and footer templates",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample4/index.html",
 			options: Options{
 				HeaderTemplate: func() string {
-					b, err := ioutil.ReadFile("/tests/test/testdata/chromium/url/sample2/header.html")
+					b, err := os.ReadFile("/tests/test/testdata/chromium/url/sample2/header.html")
 					if err != nil {
 						t.Fatalf("expected no error but got: %v", err)
 					}
@@ -407,7 +460,7 @@ func TestChromium_PDF(t *testing.T) {
 					return string(b)
 				}(),
 				FooterTemplate: func() string {
-					b, err := ioutil.ReadFile("/tests/test/testdata/chromium/url/sample2/footer.html")
+					b, err := os.ReadFile("/tests/test/testdata/chromium/url/sample2/footer.html")
 					if err != nil {
 						t.Fatalf("expected no error but got: %v", err)
 					}
@@ -417,14 +470,20 @@ func TestChromium_PDF(t *testing.T) {
 			},
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample5/index.html",
+			name:    "with file using a .gif",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample5/index.html",
 		},
 		{
+			name:                     "with allow file access from files",
+			timeout:                  time.Duration(60) * time.Second,
 			URL:                      "file:///tests/test/testdata/chromium/html/sample6/index.html",
 			allowFileAccessFromFiles: true,
 		},
 		{
-			URL: "file:///tests/test/testdata/chromium/html/sample7/index.html",
+			name:    "with file using a style attribute",
+			timeout: time.Duration(60) * time.Second,
+			URL:     "file:///tests/test/testdata/chromium/html/sample7/index.html",
 		},
 	} {
 		func() {
@@ -432,9 +491,11 @@ func TestChromium_PDF(t *testing.T) {
 			mod.binPath = os.Getenv("CHROMIUM_BIN_PATH")
 			mod.userAgent = tc.userAgent
 			mod.incognito = tc.incognito
+			mod.allowInsecureLocalhost = tc.allowInsecureLocalhost
 			mod.ignoreCertificateErrors = tc.ignoreCertificateErrors
 			mod.disableWebSecurity = tc.disableWebSecurity
 			mod.allowFileAccessFromFiles = tc.allowFileAccessFromFiles
+			mod.hostResolverRules = tc.hostResolverRules
 			mod.proxyServer = tc.proxyServer
 
 			if tc.allowList == nil {
@@ -451,13 +512,13 @@ func TestChromium_PDF(t *testing.T) {
 
 			outputDir, err := gotenberg.MkdirAll()
 			if err != nil {
-				t.Fatalf("test %d: expected error but got: %v", i, err)
+				t.Fatalf("test %s: expected error but got: %v", tc.name, err)
 			}
 
 			defer func() {
 				err := os.RemoveAll(outputDir)
 				if err != nil {
-					t.Fatalf("test %d: expected no error but got: %v", i, err)
+					t.Fatalf("test %s: expected no error but got: %v", tc.name, err)
 				}
 			}()
 
@@ -471,11 +532,11 @@ func TestChromium_PDF(t *testing.T) {
 			}
 
 			if tc.expectErr && err == nil {
-				t.Errorf("test %d: expected error but got: %v", i, err)
+				t.Errorf("test %s: expected error but got: %v", tc.name, err)
 			}
 
 			if !tc.expectErr && err != nil {
-				t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Errorf("test %s: expected no error but got: %v", tc.name, err)
 			}
 		}()
 	}

pkg/modules/chromium/routes.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -130,10 +129,8 @@ func convertURLRoute(chromium API, engine gotenberg.PDFEngine) api.Route {
 			form, options := FormDataChromiumPDFOptions(ctx)
 
 			var (
-				URL         string
+				URL       string
-				PDFformat   string
+				PDFformat string
-				linkPaths   []string
-				scriptPaths []string
 			)
 
 			err := form.
@@ -163,176 +160,12 @@ func convertURLRoute(chromium API, engine gotenberg.PDFEngine) api.Route {
 
 					return nil
 				}).
-				Paths([]string{".woff2", ".woff", ".ttf", ".css"}, &linkPaths).
-				Paths([]string{".js"}, &scriptPaths).
 				Validate()
 
 			if err != nil {
 				return fmt.Errorf("validate form data: %w", err)
 			}
 
-			// Thanks to Options.LinkTags and Options.ScriptTags, one may
-			// "hijack" the content of a remote HTML document (for instance, a
-			// website) by loading external assets like scripts or CSS
-			// stylesheets.
-			//
-			// There are two possibilities:
-			//
-			// 1. We auto-detect all files sent in the request that match the
-			// following file extensions: ".woff2", ".woff", ".ttf", ".css",
-			// ".css", and ".js".
-			//
-			// 2. The user has sent both files and a JSON mapping via the
-			// "extraLinkTags" and/or "extraScriptTags" form fields. In such a
-			// scenario, the JSON mapping has the priority for ordering, and
-			// files which are a not mapped are added at the end. The user may
-			// also have sent remote URLs in the JSON mapping.
-
-			// First, let's handle the HTML <link> elements.
-			hasExtraLinkTags := len(options.ExtraLinkTags) > 0
-			hasLinkPaths := len(linkPaths) > 0
-
-			if !hasExtraLinkTags && hasLinkPaths {
-				// First scenario: there is no JSON mapping, we simply add the
-				// paths.
-				options.ExtraLinkTags = make([]LinkTag, len(linkPaths))
-
-				for i, path := range linkPaths {
-					options.ExtraLinkTags[i] = LinkTag{
-						Href: filepath.Base(path),
-					}
-				}
-			} else if hasExtraLinkTags && hasLinkPaths {
-				// Second scenario: there are both files and a JSON mapping.
-
-				// First, find the filenames of the files.
-				filenames := make([]string, len(linkPaths))
-				for i, path := range linkPaths {
-					filenames[i] = filepath.Base(path)
-				}
-
-				var extraLinkTags []LinkTag
-
-				// Then, let's find the filenames that exist in the JSON
-				// mapping, plus the entries that do only exist in the JSON
-				// mapping.
-				for _, linkTagFromMapping := range options.ExtraLinkTags {
-					found := false
-
-					for _, filename := range filenames {
-						if linkTagFromMapping.Href == filename {
-							extraLinkTags = append(extraLinkTags, linkTagFromMapping)
-							found = true
-
-							break
-						}
-					}
-
-					if !found {
-						// This entry only exist in the JSON mapping.
-						extraLinkTags = append(extraLinkTags, linkTagFromMapping)
-					}
-				}
-
-				// Then, add the remaining filenames.
-				for _, filename := range filenames {
-					found := false
-
-					for _, linkTag := range extraLinkTags {
-						if linkTag.Href == filename {
-							found = true
-
-							break
-						}
-					}
-
-					if !found {
-						extraLinkTags = append(extraLinkTags, LinkTag{
-							Href: filename,
-						})
-					}
-				}
-
-				// Last but not least, update the options.
-				options.ExtraLinkTags = extraLinkTags
-			}
-
-			// Next, let's handle the HTML <script> elements.
-			hasExtraScriptTags := len(options.ExtraScriptTags) > 0
-			hasScriptPaths := len(scriptPaths) > 0
-
-			if !hasExtraScriptTags && hasScriptPaths {
-				// First scenario: there is no JSON mapping, we simply add the
-				// paths.
-				options.ExtraScriptTags = make([]ScriptTag, len(scriptPaths))
-
-				for i, path := range scriptPaths {
-					options.ExtraScriptTags[i] = ScriptTag{
-						Src: filepath.Base(path),
-					}
-				}
-			} else if hasExtraScriptTags && hasScriptPaths {
-				// Second scenario: there are both files and a JSON mapping.
-
-				// First, find the filenames of the files.
-				filenames := make([]string, len(scriptPaths))
-				for i, path := range scriptPaths {
-					filenames[i] = filepath.Base(path)
-				}
-
-				var extraScriptTags []ScriptTag
-
-				// Then, let's find the filenames that exist in the JSON
-				// mapping, plus the entries that do only exist in the JSON
-				// mapping.
-				for _, scriptTagFromMapping := range options.ExtraScriptTags {
-					found := false
-
-					for _, filename := range filenames {
-						if scriptTagFromMapping.Src == filename {
-							extraScriptTags = append(extraScriptTags, scriptTagFromMapping)
-							found = true
-
-							break
-						}
-					}
-
-					if !found {
-						// This entry only exist in the JSON mapping.
-						extraScriptTags = append(extraScriptTags, scriptTagFromMapping)
-					}
-				}
-
-				// Then, add the remaining filenames.
-				for _, filename := range filenames {
-					found := false
-
-					for _, scriptTag := range extraScriptTags {
-						if scriptTag.Src == filename {
-							found = true
-
-							break
-						}
-					}
-
-					if !found {
-						extraScriptTags = append(extraScriptTags, ScriptTag{
-							Src: filename,
-						})
-					}
-				}
-
-				// Last but not least, update the options.
-				options.ExtraScriptTags = extraScriptTags
-			}
-
-			// For both <link> and <script> HTML elements, other scenarios are:
-			//
-			// 1. No files and no JSON mapping.
-			// 2. No files but JSON mapping.
-			//
-			// Nothing to do in such cases.
-
 			err = convertURL(ctx, chromium, engine, URL, PDFformat, options)
 			if err != nil {
 				return fmt.Errorf("convert URL to PDF: %w", err)
@@ -437,7 +270,7 @@ func convertMarkdownRoute(chromium API, engine gotenberg.PDFEngine) api.Route {
 							return "", nil
 						}
 
-						b, err := ioutil.ReadFile(path)
+						b, err := os.ReadFile(path)
 						if err != nil {
 							return "", fmt.Errorf("read markdown file '%s': %w", filename, err)
 						}

pkg/modules/chromium/routes_test.go

@@ -3,7 +3,6 @@ package chromium
 import (
 	"context"
 	"errors"
-	"fmt"
 	"net/http"
 	"os"
 	"reflect"
@@ -17,16 +16,16 @@ import (
 
 func TestFormDataChromiumPDFOptions(t *testing.T) {
 	for i, tc := range []struct {
-		ctx     *api.MockContext
+		ctx     *api.ContextMock
 		options Options
 	}{
 		{
-			ctx:     &api.MockContext{Context: &api.Context{}},
+			ctx:     &api.ContextMock{Context: &api.Context{}},
 			options: DefaultOptions(),
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"extraHttpHeaders": {
 						"foo",
@@ -38,8 +37,8 @@ func TestFormDataChromiumPDFOptions(t *testing.T) {
 			options: DefaultOptions(),
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"extraHttpHeaders": {
 						`{"foo":"bar"}`,
@@ -58,8 +57,8 @@ func TestFormDataChromiumPDFOptions(t *testing.T) {
 			}(),
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"extraHttpHeaders": {
 						"foo",
@@ -71,8 +70,8 @@ func TestFormDataChromiumPDFOptions(t *testing.T) {
 			options: DefaultOptions(),
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"emulatedMediaType": {
 						"foo",
@@ -84,8 +83,8 @@ func TestFormDataChromiumPDFOptions(t *testing.T) {
 			options: DefaultOptions(),
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"emulatedMediaType": {
 						"screen",
@@ -112,7 +111,7 @@ func TestFormDataChromiumPDFOptions(t *testing.T) {
 
 func TestConvertURLHandler(t *testing.T) {
 	for i, tc := range []struct {
-		ctx                    *api.MockContext
+		ctx                    *api.ContextMock
 		api                    API
 		expectErr              bool
 		expectHTTPErr          bool
@@ -120,14 +119,14 @@ func TestConvertURLHandler(t *testing.T) {
 		expectOutputPathsCount int
 	}{
 		{
-			ctx:              &api.MockContext{Context: &api.Context{}},
+			ctx:              &api.ContextMock{Context: &api.Context{}},
 			expectErr:        true,
 			expectHTTPErr:    true,
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"url": {
 						"",
@@ -141,8 +140,8 @@ func TestConvertURLHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"url": {
 						"foo",
@@ -162,8 +161,8 @@ func TestConvertURLHandler(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"url": {
 						"foo",
@@ -183,8 +182,8 @@ func TestConvertURLHandler(t *testing.T) {
 			expectOutputPathsCount: 1,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"url": {
 						"foo",
@@ -209,92 +208,8 @@ func TestConvertURLHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
-				ctx.SetValues(map[string][]string{
-					"url": {
-						"foo",
-					},
-				})
-				ctx.SetFiles(map[string]string{
-					"b.css":  "/b.css",
-					"a.woff": "/a.woff",
-				})
-
-				return ctx
-			}(),
-			api: func() API {
-				chromiumAPI := struct{ ProtoAPI }{}
-				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, options Options) error {
-					expectOptions := DefaultOptions()
-					expectOptions.ExtraLinkTags = []LinkTag{
-						{
-							Href: "a.woff",
-						},
-						{
-							Href: "b.css",
-						},
-					}
-
-					if !reflect.DeepEqual(options, expectOptions) {
-						return fmt.Errorf("expected options %+v, but got: %+v", expectOptions, options)
-					}
-
-					return nil
-				}
-
-				return chromiumAPI
-			}(),
-			expectOutputPathsCount: 1,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-				ctx.SetValues(map[string][]string{
-					"url": {
-						"foo",
-					},
-					"extraLinkTags": {
-						`[{"href":"https://cdn.foo"},{"href":"b.css"}]`,
-					},
-				})
-				ctx.SetFiles(map[string]string{
-					"b.css":  "/b.css",
-					"a.woff": "/a.woff",
-				})
-
-				return ctx
-			}(),
-			api: func() API {
-				chromiumAPI := struct{ ProtoAPI }{}
-				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, options Options) error {
-					expectOptions := DefaultOptions()
-					expectOptions.ExtraLinkTags = []LinkTag{
-						{
-							Href: "https://cdn.foo",
-						},
-						{
-							Href: "b.css",
-						},
-						{
-							Href: "a.woff",
-						},
-					}
-
-					if !reflect.DeepEqual(options, expectOptions) {
-						return fmt.Errorf("expected options %+v, but got: %+v", expectOptions, options)
-					}
-
-					return nil
-				}
-
-				return chromiumAPI
-			}(),
-			expectOutputPathsCount: 1,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"url": {
 						"foo",
@@ -319,82 +234,25 @@ func TestConvertURLHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetValues(map[string][]string{
 					"url": {
 						"foo",
 					},
-				})
+					"extraLinkTags": {
-				ctx.SetFiles(map[string]string{
+						`[{"href":"https://cdn.foo/foo.css"},{"href":"https://cdn.bar/bar.css"}]`,
-					"b.js": "/b.js",
-					"a.js": "/a.js",
-				})
-
-				return ctx
-			}(),
-			api: func() API {
-				chromiumAPI := struct{ ProtoAPI }{}
-				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, options Options) error {
-					expectOptions := DefaultOptions()
-					expectOptions.ExtraScriptTags = []ScriptTag{
-						{
-							Src: "a.js",
-						},
-						{
-							Src: "b.js",
-						},
-					}
-
-					if !reflect.DeepEqual(options, expectOptions) {
-						return fmt.Errorf("expected options %+v, but got: %+v", expectOptions, options)
-					}
-
-					return nil
-				}
-
-				return chromiumAPI
-			}(),
-			expectOutputPathsCount: 1,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-				ctx.SetValues(map[string][]string{
-					"url": {
-						"foo",
 					},
 					"extraScriptTags": {
-						`[{"src":"https://cdn.foo"},{"src":"b.js"}]`,
+						`[{"src":"https://cdn.foo/foo.js"},{"src":"https://cdn.bar/bar.js"}]`,
 					},
 				})
-				ctx.SetFiles(map[string]string{
-					"b.js": "/b.js",
-					"a.js": "/a.js",
-				})
 
 				return ctx
 			}(),
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
-				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, options Options) error {
+				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
-					expectOptions := DefaultOptions()
-					expectOptions.ExtraScriptTags = []ScriptTag{
-						{
-							Src: "https://cdn.foo",
-						},
-						{
-							Src: "b.js",
-						},
-						{
-							Src: "a.js",
-						},
-					}
-
-					if !reflect.DeepEqual(options, expectOptions) {
-						return fmt.Errorf("expected options %+v, but got: %+v", expectOptions, options)
-					}
-
 					return nil
 				}
 
@@ -442,7 +300,7 @@ func TestConvertURLHandler(t *testing.T) {
 
 func TestConvertHTMLHandler(t *testing.T) {
 	for i, tc := range []struct {
-		ctx                    *api.MockContext
+		ctx                    *api.ContextMock
 		api                    API
 		expectErr              bool
 		expectHTTPErr          bool
@@ -450,14 +308,14 @@ func TestConvertHTMLHandler(t *testing.T) {
 		expectOutputPathsCount int
 	}{
 		{
-			ctx:              &api.MockContext{Context: &api.Context{}},
+			ctx:              &api.ContextMock{Context: &api.Context{}},
 			expectErr:        true,
 			expectHTTPErr:    true,
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"foo.html": "/foo/foo.html",
 				})
@@ -469,8 +327,8 @@ func TestConvertHTMLHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html": "/foo/foo.html",
 				})
@@ -488,8 +346,8 @@ func TestConvertHTMLHandler(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html": "/foo/foo.html",
 				})
@@ -546,7 +404,7 @@ func TestConvertHTMLHandler(t *testing.T) {
 
 func TestConvertMarkdownHandler(t *testing.T) {
 	for i, tc := range []struct {
-		ctx                    *api.MockContext
+		ctx                    *api.ContextMock
 		api                    API
 		outputDir              string
 		expectErr              bool
@@ -555,14 +413,14 @@ func TestConvertMarkdownHandler(t *testing.T) {
 		expectOutputPathsCount int
 	}{
 		{
-			ctx:              &api.MockContext{Context: &api.Context{}},
+			ctx:              &api.ContextMock{Context: &api.Context{}},
 			expectErr:        true,
 			expectHTTPErr:    true,
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"foo.html": "/foo/foo.html",
 				})
@@ -574,8 +432,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html": "/foo/foo.html",
 				})
@@ -587,8 +445,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html":  "/foo/foo.html",
 					"markdown.md": "/foo/markdown.md",
@@ -599,8 +457,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html":   "/tests/test/testdata/chromium/markdown/sample2/index.html",
 					"markdown1.md": "/foo/markdown1.md",
@@ -613,8 +471,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html":   "/tests/test/testdata/chromium/markdown/sample1/index.html",
 					"markdown1.md": "/foo/markdown1.md",
@@ -633,8 +491,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"index.html":   "/tests/test/testdata/chromium/markdown/sample1/index.html",
 					"markdown1.md": "/tests/test/testdata/chromium/markdown/sample1/markdown1.md",
@@ -655,8 +513,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 
 				ctx.SetDirPath("/tmp/foo")
 				ctx.SetFiles(map[string]string{
@@ -680,8 +538,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 
 				ctx.SetDirPath("/tmp/foo")
 				ctx.SetFiles(map[string]string{
@@ -705,8 +563,8 @@ func TestConvertMarkdownHandler(t *testing.T) {
 			expectOutputPathsCount: 1,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 
 				ctx.SetDirPath("/tmp/foo")
 				ctx.SetFiles(map[string]string{
@@ -784,7 +642,7 @@ func TestConvertMarkdownHandler(t *testing.T) {
 
 func TestConvertURL(t *testing.T) {
 	for i, tc := range []struct {
-		ctx                    *api.MockContext
+		ctx                    *api.ContextMock
 		api                    API
 		engine                 gotenberg.PDFEngine
 		PDFformat              string
@@ -795,7 +653,7 @@ func TestConvertURL(t *testing.T) {
 		expectOutputPathsCount int
 	}{
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -810,7 +668,7 @@ func TestConvertURL(t *testing.T) {
 			expectHTTPStatus: http.StatusForbidden,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -823,7 +681,7 @@ func TestConvertURL(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -843,7 +701,7 @@ func TestConvertURL(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -858,7 +716,7 @@ func TestConvertURL(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -873,7 +731,7 @@ func TestConvertURL(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -888,7 +746,7 @@ func TestConvertURL(t *testing.T) {
 			expectHTTPStatus: http.StatusConflict,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -901,7 +759,7 @@ func TestConvertURL(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -924,7 +782,7 @@ func TestConvertURL(t *testing.T) {
 			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -945,7 +803,7 @@ func TestConvertURL(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {
@@ -966,8 +824,8 @@ func TestConvertURL(t *testing.T) {
 			expectOutputPathsCount: 1,
 		},
 		{
-			ctx: func() *api.MockContext {
+			ctx: func() *api.ContextMock {
-				ctx := &api.MockContext{Context: &api.Context{}}
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetCancelled(true)
 
 				return ctx
@@ -984,7 +842,7 @@ func TestConvertURL(t *testing.T) {
 			expectErr: true,
 		},
 		{
-			ctx: &api.MockContext{Context: &api.Context{}},
+			ctx: &api.ContextMock{Context: &api.Context{}},
 			api: func() API {
 				chromiumAPI := struct{ ProtoAPI }{}
 				chromiumAPI.pdf = func(_ context.Context, _ *zap.Logger, _, _ string, _ Options) error {

pkg/modules/chromium/stream.go

@@ -0,0 +1,117 @@
+package chromium
+
+import (
+	"bytes"
+	"context"
+	"encoding/base64"
+	"fmt"
+	"io"
+	"strings"
+
+	"github.com/chromedp/cdproto/cdp"
+	cdprotoio "github.com/chromedp/cdproto/io"
+)
+
+// Credits: https://raw.githubusercontent.com/mafredri/cdp/3c5eab7ffc5cbee667b0a813ce470ac423792811/protocol/io/stream_reader.go.
+type streamReader struct {
+	ctx    context.Context
+	handle cdprotoio.StreamHandle
+	r      io.Reader
+	pos    int
+	eof    bool
+}
+
+// Read a chunk of the stream.
+func (reader *streamReader) Read(p []byte) (n int, err error) {
+	if reader.r != nil {
+		// Continue reading from buffer.
+		return reader.read(p)
+	}
+
+	if reader.eof {
+		return 0, io.EOF
+	}
+
+	if len(p) == 0 {
+		return 0, nil
+	}
+
+	// Chromium might have an off-by-one when deciding the maximum size (at
+	// least for base64 encoded data), usually it will overflow. We subtract
+	// one to make sure it fits into p.
+	size := len(p) - 1
+	if size < 1 {
+		// Safety-check to avoid crashing Chrome (e.g. via SetSize(-1)).
+		size = 1
+	}
+
+	reply, err := reader.next(reader.pos, size)
+	if err != nil {
+		return 0, err
+	}
+
+	reader.eof = reply.EOF
+
+	switch {
+	case reply.Base64encoded:
+		b := []byte(reply.Data)
+		size := base64.StdEncoding.DecodedLen(len(b))
+
+		// Safety-check for fast-path to avoid panics.
+		if len(p) >= size {
+			n, err = base64.StdEncoding.Decode(p, b)
+			reader.pos += n
+
+			return n, err
+		}
+
+		reader.r = base64.NewDecoder(base64.StdEncoding, bytes.NewReader(b))
+	default:
+		reader.r = strings.NewReader(reply.Data)
+	}
+
+	return reader.read(p)
+}
+
+// Close closes the stream, discard any temporary backing storage.
+func (reader *streamReader) Close() error {
+	err := cdprotoio.Close(reader.handle).Do(reader.ctx)
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("close Chromium stream: %w", err)
+}
+
+func (reader *streamReader) next(pos, size int) (cdprotoio.ReadReturns, error) {
+	params := cdprotoio.
+		Read(reader.handle).
+		WithOffset(int64(pos)).
+		WithSize(int64(size))
+
+	var res cdprotoio.ReadReturns
+	err := cdp.Execute(reader.ctx, cdprotoio.CommandRead, params, &res)
+
+	if err == nil {
+		return res, nil
+	}
+
+	return res, fmt.Errorf("execute IO.read command: %w", err)
+}
+
+func (reader *streamReader) read(p []byte) (n int, err error) {
+	n, err = reader.r.Read(p)
+	reader.pos += n
+
+	if !reader.eof && err == io.EOF {
+		reader.r = nil
+		err = nil
+	}
+
+	return n, err
+}
+
+// Interface guards.
+var (
+	_ io.Reader = (*streamReader)(nil)
+)

pkg/modules/gc/gc.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"os/signal"
 	"path/filepath"
 	"strings"
 	"sync"
@@ -202,19 +201,10 @@ func (gc *GarbageCollector) Stop(ctx context.Context) error {
 	}
 
 	// Block until the context is done so that other module may gracefully stop
-	// before we do a shutdown cleanup. We skip this step if we receive a
+	// before we do a shutdown cleanup.
-	// SIGINT in the meantime.
 	gc.logger.Debug("wait for the end of grace duration")
 
-	quit := make(chan os.Signal, 1)
+	<-ctx.Done()
-	signal.Notify(quit, os.Interrupt)
-
-	select {
-	case <-quit:
-		return nil
-	case <-ctx.Done():
-		break
-	}
 
 	gc.ticker.Stop()
 	gc.done <- true

pkg/modules/libreoffice/doc.go

@@ -1,3 +1,3 @@
 // Package libreoffice provides a module which adds a route for converting
-// document to PDF with LibreOffice.
+// documents to PDF with LibreOffice.
 package libreoffice

pkg/modules/libreoffice/libreoffice.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
+	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	flag "github.com/spf13/pflag"
 )
 
@@ -16,7 +16,7 @@ func init() {
 // LibreOffice is a module which provides a route for converting documents to
 // PDF with LibreOffice.
 type LibreOffice struct {
-	unoconv       unoconv.API
+	unoAPI        uno.API
 	engine        gotenberg.PDFEngine
 	disableRoutes bool
 }
@@ -40,17 +40,17 @@ func (mod *LibreOffice) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
 	mod.disableRoutes = flags.MustBool("libreoffice-disable-routes")
 
-	provider, err := ctx.Module(new(unoconv.Provider))
+	provider, err := ctx.Module(new(uno.Provider))
 	if err != nil {
-		return fmt.Errorf("get unoconv provider: %w", err)
+		return fmt.Errorf("get unoAPI provider: %w", err)
 	}
 
-	uno, err := provider.(unoconv.Provider).Unoconv()
+	unoAPI, err := provider.(uno.Provider).UNO()
 	if err != nil {
-		return fmt.Errorf("get unoconv API: %w", err)
+		return fmt.Errorf("get unoAPI API: %w", err)
 	}
 
-	mod.unoconv = uno
+	mod.unoAPI = unoAPI
 
 	provider, err = ctx.Module(new(gotenberg.PDFEngineProvider))
 	if err != nil {
@@ -74,7 +74,7 @@ func (mod LibreOffice) Routes() ([]api.Route, error) {
 	}
 
 	return []api.Route{
-		convertRoute(mod.unoconv, mod.engine),
+		convertRoute(mod.unoAPI, mod.engine),
 	}, nil
 }
 

pkg/modules/libreoffice/libreoffice_test.go

@@ -1,68 +1,14 @@
 package libreoffice
 
 import (
-	"context"
 	"errors"
 	"reflect"
 	"testing"
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
+	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
-	"go.uber.org/zap"
 )
 
-type ProtoModule struct {
-	descriptor func() gotenberg.ModuleDescriptor
-}
-
-func (mod ProtoModule) Descriptor() gotenberg.ModuleDescriptor {
-	return mod.descriptor()
-}
-
-type ProtoUnoconvProvider struct {
-	ProtoModule
-	unoconv func() (unoconv.API, error)
-}
-
-func (mod ProtoUnoconvProvider) Unoconv() (unoconv.API, error) {
-	return mod.unoconv()
-}
-
-type ProtoUnoconvAPI struct {
-	pdf        func(_ context.Context, _ *zap.Logger, _, _ string, _ unoconv.Options) error
-	extensions func() []string
-}
-
-func (mod ProtoUnoconvAPI) PDF(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options unoconv.Options) error {
-	return mod.pdf(ctx, logger, inputPath, outputPath, options)
-}
-
-func (mod ProtoUnoconvAPI) Extensions() []string {
-	return mod.extensions()
-}
-
-type ProtoPDFEngineProvider struct {
-	ProtoModule
-	pdfEngine func() (gotenberg.PDFEngine, error)
-}
-
-func (mod ProtoPDFEngineProvider) PDFEngine() (gotenberg.PDFEngine, error) {
-	return mod.pdfEngine()
-}
-
-type ProtoPDFEngine struct {
-	merge   func(_ context.Context, _ *zap.Logger, _ []string, _ string) error
-	convert func(_ context.Context, _ *zap.Logger, _, _, _ string) error
-}
-
-func (mod ProtoPDFEngine) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-	return mod.merge(ctx, logger, inputPaths, outputPath)
-}
-
-func (mod ProtoPDFEngine) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-	return mod.convert(ctx, logger, format, inputPath, outputPath)
-}
-
 func TestLibreOffice_Descriptor(t *testing.T) {
 	descriptor := LibreOffice{}.Descriptor()
 
@@ -75,15 +21,38 @@ func TestLibreOffice_Descriptor(t *testing.T) {
 }
 
 func TestLibreOffice_Provision(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx       *gotenberg.Context
+		name               string
-		expectErr bool
+		ctx                *gotenberg.Context
+		expectProvisionErr bool
 	}{
 		{
+			name: "nominal behavior",
 			ctx: func() *gotenberg.Context {
-				mod := struct{ ProtoModule }{}
+				provider1 := struct {
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
+					uno.ProviderMock
+				}{}
+				provider1.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider1
+					}}
+				}
+				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
 				}
 
 				return gotenberg.NewContext(
@@ -91,41 +60,36 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						mod.Descriptor(),
+						provider1.Descriptor(),
+						provider2.Descriptor(),
 					},
 				)
 			}(),
-			expectErr: true,
 		},
 		{
-			ctx: func() *gotenberg.Context {
+			name: "no UNO API provider",
-				mod := struct{ ProtoUnoconvProvider }{}
+			ctx: gotenberg.NewContext(
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
+				gotenberg.ParsedFlags{
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
+					FlagSet: new(LibreOffice).Descriptor().FlagSet,
-				}
+				},
-				mod.unoconv = func() (unoconv.API, error) {
+				[]gotenberg.ModuleDescriptor{},
-					return nil, errors.New("foo")
+			),
-				}
+			expectProvisionErr: true,
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: new(LibreOffice).Descriptor().FlagSet,
-					},
-					[]gotenberg.ModuleDescriptor{
-						mod.Descriptor(),
-					},
-				)
-			}(),
-			expectErr: true,
 		},
 		{
+			name: "no API from UNO API provider",
 			ctx: func() *gotenberg.Context {
-				mod := struct{ ProtoUnoconvProvider }{}
+				provider := struct {
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
+					uno.ProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
 				}
-				mod.unoconv = func() (unoconv.API, error) {
+				provider.UNOMock = func() (uno.API, error) {
-					return struct{ ProtoUnoconvAPI }{}, nil
+					return uno.APIMock{}, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
@@ -133,28 +97,26 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						mod.Descriptor(),
+						provider.Descriptor(),
 					},
 				)
 			}(),
-			expectErr: true,
+			expectProvisionErr: true,
 		},
 		{
+			name: "no PDF engine provider",
 			ctx: func() *gotenberg.Context {
-				mod1 := struct{ ProtoUnoconvProvider }{}
+				provider := struct {
-				mod1.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod1 }}
+					uno.ProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
 				}
-				mod1.unoconv = func() (unoconv.API, error) {
+				provider.UNOMock = func() (uno.API, error) {
-					return struct{ ProtoUnoconvAPI }{}, nil
+					return uno.APIMock{}, nil
-				}
-
-				mod2 := struct{ ProtoPDFEngineProvider }{}
-				mod2.descriptor = func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod2 }}
-				}
-				mod2.pdfEngine = func() (gotenberg.PDFEngine, error) {
-					return nil, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
@@ -162,29 +124,39 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						mod1.Descriptor(),
+						provider.Descriptor(),
-						mod2.Descriptor(),
 					},
 				)
 			}(),
-			expectErr: true,
+			expectProvisionErr: true,
 		},
 		{
+			name: "no PDF engine from PDF engine provider",
 			ctx: func() *gotenberg.Context {
-				mod1 := struct{ ProtoUnoconvProvider }{}
+				provider1 := struct {
-				mod1.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod1 }}
+					uno.ProviderMock
+				}{}
+				provider1.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider1
+					}}
 				}
-				mod1.unoconv = func() (unoconv.API, error) {
+				provider1.UNOMock = func() (uno.API, error) {
-					return struct{ ProtoUnoconvAPI }{}, nil
+					return uno.APIMock{}, nil
 				}
 
-				mod2 := struct{ ProtoPDFEngineProvider }{}
+				provider2 := struct {
-				mod2.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return mod2 }}
+					gotenberg.PDFEngineProviderMock
+				}{}
+				provider2.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module {
+						return provider2
+					}}
 				}
-				mod2.pdfEngine = func() (gotenberg.PDFEngine, error) {
+				provider2.PDFEngineMock = func() (gotenberg.PDFEngine, error) {
-					return struct{ ProtoPDFEngine }{}, nil
+					return gotenberg.PDFEngineMock{}, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
@@ -192,59 +164,60 @@ func TestLibreOffice_Provision(t *testing.T) {
 						FlagSet: new(LibreOffice).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						mod1.Descriptor(),
+						provider1.Descriptor(),
-						mod2.Descriptor(),
+						provider2.Descriptor(),
 					},
 				)
 			}(),
+			expectProvisionErr: true,
 		},
-	} {
+	}
-		mod := new(LibreOffice)
-		err := mod.Provision(tc.ctx)
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			mod := new(LibreOffice)
+			err := mod.Provision(tc.ctx)
 
-		if !tc.expectErr && err != nil {
+			if tc.expectProvisionErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Error("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 TestLibreOffice_Routes(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		expectRoutes  int
+		name              string
-		disableRoutes bool
+		mod               LibreOffice
+		expectRoutesCount int
 	}{
 		{
-			expectRoutes: 1,
+			name:              "route not disabled",
+			mod:               LibreOffice{},
+			expectRoutesCount: 1,
 		},
 		{
-			disableRoutes: true,
+			name: "route disabled",
+			mod: LibreOffice{
+				disableRoutes: true,
+			},
 		},
-	} {
+	}
-		mod := new(LibreOffice)
-		mod.disableRoutes = tc.disableRoutes
 
-		routes, err := mod.Routes()
+	for _, tc := range tests {
-		if err != nil {
+		t.Run(tc.name, func(t *testing.T) {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
+			routes, err := tc.mod.Routes()
-		}
+			if err != nil {
+				t.Fatalf("expected no error from mod.Routes(), but got: %v", err)
+			}
 
-		if tc.expectRoutes != len(routes) {
+			if tc.expectRoutesCount != len(routes) {
-			t.Errorf("test %d: expected %d routes but got %d", i, tc.expectRoutes, len(routes))
+				t.Errorf("expected %d routes from mod.Routes(), but got %d", tc.expectRoutesCount, len(routes))
-		}
+			}
+		})
 	}
 }
-
-// Interface guards.
-var (
-	_ gotenberg.Module            = (*ProtoModule)(nil)
-	_ unoconv.Provider            = (*ProtoUnoconvProvider)(nil)
-	_ gotenberg.Module            = (*ProtoUnoconvProvider)(nil)
-	_ unoconv.API                 = (*ProtoUnoconvAPI)(nil)
-	_ gotenberg.PDFEngineProvider = (*ProtoPDFEngineProvider)(nil)
-	_ gotenberg.Module            = (*ProtoPDFEngineProvider)(nil)
-	_ gotenberg.PDFEngine         = (*ProtoPDFEngine)(nil)
-)

pkg/modules/libreoffice/pdfengine/doc.go

@@ -1,3 +1,4 @@
-// Package pdfengine provides a module which abstracts the CLI tool unoconv and
+// Package pdfengine provides a module which interacts with the UNO
-// implements the gotenberg.PDFEngine interface.
+// (Universal Network Objects) API and implements the gotenberg.PDFEngine
+// interface.
 package pdfengine

pkg/modules/libreoffice/pdfengine/pdfengine.go

@@ -2,75 +2,76 @@ package pdfengine
 
 import (
 	"context"
+	"errors"
 	"fmt"
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
+	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	"go.uber.org/zap"
 )
 
 func init() {
-	gotenberg.MustRegisterModule(UnoconvPDFEngine{})
+	gotenberg.MustRegisterModule(UNO{})
 }
 
-// UnoconvPDFEngine abstracts the CLI tool unoconv and implements the
+// UNO interacts with the UNO (Universal Network Objects) API and implements
-// gotenberg.PDFEngine interface.
+// the gotenberg.PDFEngine interface.
-type UnoconvPDFEngine struct {
+type UNO struct {
-	unoconv unoconv.API
+	unoAPI uno.API
 }
 
-// Descriptor returns a UnoconvPDFEngine's module descriptor.
+// Descriptor returns a UNO's module descriptor.
-func (UnoconvPDFEngine) Descriptor() gotenberg.ModuleDescriptor {
+func (UNO) Descriptor() gotenberg.ModuleDescriptor {
 	return gotenberg.ModuleDescriptor{
-		ID:  "unoconv-pdfengine",
+		ID:  "uno-pdfengine",
-		New: func() gotenberg.Module { return new(UnoconvPDFEngine) },
+		New: func() gotenberg.Module { return new(UNO) },
 	}
 }
 
 // Provision sets the module properties.
-func (engine *UnoconvPDFEngine) Provision(ctx *gotenberg.Context) error {
+func (engine *UNO) Provision(ctx *gotenberg.Context) error {
-	provider, err := ctx.Module(new(unoconv.Provider))
+	provider, err := ctx.Module(new(uno.Provider))
 	if err != nil {
 		return fmt.Errorf("get unoconv provider: %w", err)
 	}
 
-	uno, err := provider.(unoconv.Provider).Unoconv()
+	unoAPI, err := provider.(uno.Provider).UNO()
 	if err != nil {
 		return fmt.Errorf("get unoconv API: %w", err)
 	}
 
-	engine.unoconv = uno
+	engine.unoAPI = unoAPI
 
 	return nil
 }
 
 // Merge is not available for this PDF engine.
-func (engine UnoconvPDFEngine) Merge(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+func (engine UNO) Merge(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
 	return fmt.Errorf("merge PDFs with unoconv: %w", gotenberg.ErrPDFEngineMethodNotAvailable)
 }
 
 // Convert converts the given PDF to a specific PDF format. Currently, only the
-// PDF/A-1 format is available. If another PDF format is requested, it returns
+// PDF/A-1a, PDF/A-2b and PDF/A-3b formats are available. If another PDF format
-// a gotenberg.ErrPDFFormatNotAvailable error.
+// is requested, it returns a gotenberg.ErrPDFFormatNotAvailable error.
-func (engine UnoconvPDFEngine) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+func (engine UNO) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-	if format != gotenberg.FormatPDFA1a {
+	err := engine.unoAPI.PDF(ctx, logger, inputPath, outputPath, uno.Options{
-		return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, gotenberg.ErrPDFFormatNotAvailable)
+		PDFformat: format,
-	}
-
-	err := engine.unoconv.PDF(ctx, logger, inputPath, outputPath, unoconv.Options{
-		PDFArchive: true,
 	})
 
 	if err == nil {
 		return nil
 	}
 
+	if errors.Is(err, uno.ErrInvalidPDFformat) {
+		return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, gotenberg.ErrPDFFormatNotAvailable)
+	}
+
 	return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, err)
 }
 
 // Interface guards.
 var (
-	_ gotenberg.Module      = (*UnoconvPDFEngine)(nil)
+	_ gotenberg.Module      = (*UNO)(nil)
-	_ gotenberg.Provisioner = (*UnoconvPDFEngine)(nil)
+	_ gotenberg.Provisioner = (*UNO)(nil)
-	_ gotenberg.PDFEngine   = (*UnoconvPDFEngine)(nil)
+	_ gotenberg.PDFEngine   = (*UNO)(nil)
 )

pkg/modules/libreoffice/pdfengine/pdfengine_test.go

@@ -7,191 +7,168 @@ import (
 	"testing"
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
+	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
-	flag "github.com/spf13/pflag"
 	"go.uber.org/zap"
 )
 
-type ProtoModule struct {
+func TestUNO_Descriptor(t *testing.T) {
-	descriptor func() gotenberg.ModuleDescriptor
+	descriptor := UNO{}.Descriptor()
-}
-
-func (mod ProtoModule) Descriptor() gotenberg.ModuleDescriptor {
-	return mod.descriptor()
-}
-
-type ProtoUnoconvProvider struct {
-	ProtoModule
-	unoconv func() (unoconv.API, error)
-}
-
-func (mod ProtoUnoconvProvider) Unoconv() (unoconv.API, error) {
-	return mod.unoconv()
-}
-
-type ProtoUnoconvAPI struct {
-	pdf func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options unoconv.Options) error
-}
-
-func (mod ProtoUnoconvAPI) PDF(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options unoconv.Options) error {
-	return mod.pdf(ctx, logger, inputPath, outputPath, options)
-}
-
-func (mod ProtoUnoconvAPI) Extensions() []string {
-	return nil
-}
-
-func TestUnoconvPDFEngine_Descriptor(t *testing.T) {
-	descriptor := UnoconvPDFEngine{}.Descriptor()
 
 	actual := reflect.TypeOf(descriptor.New())
-	expect := reflect.TypeOf(new(UnoconvPDFEngine))
+	expect := reflect.TypeOf(new(UNO))
 
 	if actual != expect {
 		t.Errorf("expected '%s' but got '%s'", expect, actual)
 	}
 }
 
-func TestUnoconvPDFEngine_Provision(t *testing.T) {
+func TestUNO_Provider(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx       *gotenberg.Context
+		name               string
-		expectErr bool
+		ctx                *gotenberg.Context
+		expectProvisionErr bool
 	}{
 		{
+			name: "nominal behavior",
 			ctx: func() *gotenberg.Context {
-				mod := struct{ ProtoModule }{}
+				provider := struct {
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
+					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: flag.NewFlagSet("foo", flag.ExitOnError),
+						FlagSet: new(UNO).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						mod.Descriptor(),
+						provider.Descriptor(),
 					},
 				)
 			}(),
-			expectErr: true,
 		},
 		{
-			ctx: func() *gotenberg.Context {
+			name: "no UNO API provider",
-				mod := struct{ ProtoUnoconvProvider }{}
+			ctx: gotenberg.NewContext(
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
+				gotenberg.ParsedFlags{
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
+					FlagSet: new(UNO).Descriptor().FlagSet,
-				}
+				},
-				mod.unoconv = func() (unoconv.API, error) {
+				[]gotenberg.ModuleDescriptor{},
-					return nil, errors.New("foo")
+			),
-				}
+			expectProvisionErr: true,
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: flag.NewFlagSet("foo", flag.ExitOnError),
-					},
-					[]gotenberg.ModuleDescriptor{
-						mod.Descriptor(),
-					},
-				)
-			}(),
-			expectErr: true,
 		},
 		{
+			name: "no API from UNO API provider",
 			ctx: func() *gotenberg.Context {
-				mod := struct{ ProtoUnoconvProvider }{}
+				provider := struct {
-				mod.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return mod }}
+					uno.ProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
 				}
-				mod.unoconv = func() (unoconv.API, error) {
+				provider.UNOMock = func() (uno.API, error) {
-					return struct{ ProtoUnoconvAPI }{}, nil
+					return uno.APIMock{}, errors.New("foo")
 				}
 
 				return gotenberg.NewContext(
 					gotenberg.ParsedFlags{
-						FlagSet: flag.NewFlagSet("foo", flag.ExitOnError),
+						FlagSet: new(UNO).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
-						mod.Descriptor(),
+						provider.Descriptor(),
 					},
 				)
 			}(),
+			expectProvisionErr: true,
 		},
-	} {
+	}
-		mod := new(UnoconvPDFEngine)
-		err := mod.Provision(tc.ctx)
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			mod := new(UNO)
+			err := mod.Provision(tc.ctx)
 
-		if !tc.expectErr && err != nil {
+			if tc.expectProvisionErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Error("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 TestUnoconvPDFEngine_Merge(t *testing.T) {
+func TestUNO_Merge(t *testing.T) {
-	mod := new(UnoconvPDFEngine)
+	mod := new(UNO)
-	err := mod.Merge(context.TODO(), zap.NewNop(), nil, "")
+	err := mod.Merge(context.Background(), zap.NewNop(), nil, "")
 
 	if !errors.Is(err, gotenberg.ErrPDFEngineMethodNotAvailable) {
-		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPDFEngineMethodNotAvailable, err)
+		t.Errorf("expected error %v from mod.Merge(), but got: %v", gotenberg.ErrPDFEngineMethodNotAvailable, err)
 	}
 }
 
-func TestUnoconvPDFEngine_Convert(t *testing.T) {
+func TestUNO_Convert(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		api       unoconv.API
+		name             string
-		format    string
+		mod              UNO
-		expectErr bool
+		expectConvertErr bool
 	}{
 		{
-			format:    "",
+			name: "nominal behavior",
-			expectErr: true,
+			mod: UNO{
+				unoAPI: uno.APIMock{
+					PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options uno.Options) error {
+						return nil
+					},
+				},
+			},
 		},
 		{
-			api: func() unoconv.API {
+			name: "invalid PDF format",
-				unoconvAPI := struct{ ProtoUnoconvAPI }{}
+			mod: UNO{
-				unoconvAPI.pdf = func(_ context.Context, _ *zap.Logger, _, __ string, _ unoconv.Options) error {
+				unoAPI: uno.APIMock{
-					return errors.New("foo")
+					PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options uno.Options) error {
-				}
+						return uno.ErrInvalidPDFformat
-
+					},
-				return unoconvAPI
+				},
-			}(),
+			},
-			format:    gotenberg.FormatPDFA1a,
+			expectConvertErr: true,
-			expectErr: true,
 		},
 		{
-			api: func() unoconv.API {
+			name: "convert fail",
-				unoconvAPI := struct{ ProtoUnoconvAPI }{}
+			mod: UNO{
-				unoconvAPI.pdf = func(_ context.Context, _ *zap.Logger, _, __ string, _ unoconv.Options) error {
+				unoAPI: uno.APIMock{
-					return nil
+					PDFMock: func(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options uno.Options) error {
-				}
+						return errors.New("foo")
-
+					},
-				return unoconvAPI
+				},
-			}(),
+			},
-			format: gotenberg.FormatPDFA1a,
+			expectConvertErr: true,
 		},
-	} {
+	}
-		mod := new(UnoconvPDFEngine)
-		mod.unoconv = tc.api
 
-		err := mod.Convert(context.TODO(), zap.NewNop(), tc.format, "", "")
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.mod.Convert(context.Background(), zap.NewNop(), "", "", "")
 
-		if tc.expectErr && err == nil {
+			if tc.expectConvertErr && err == nil {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+				t.Errorf("expected mod.Convert() error, but got none")
-		}
+			}
 
-		if !tc.expectErr && err != nil {
+			if !tc.expectConvertErr && err != nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Fatalf("expected no error from mod.Convert(), but got: %v", err)
-		}
+			}
+		})
 	}
 }
-
-// Interface guards.
-var (
-	_ gotenberg.Module = (*ProtoModule)(nil)
-	_ unoconv.Provider = (*ProtoUnoconvProvider)(nil)
-	_ gotenberg.Module = (*ProtoUnoconvProvider)(nil)
-	_ unoconv.API      = (*ProtoUnoconvAPI)(nil)
-)

pkg/modules/libreoffice/routes.go

@@ -7,13 +7,13 @@ import (
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
-	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
+	"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	"github.com/labstack/echo/v4"
 )
 
 // convertRoute returns an api.Route which can convert LibreOffice documents
 // to PDF.
-func convertRoute(uno unoconv.API, engine gotenberg.PDFEngine) api.Route {
+func convertRoute(unoAPI uno.API, engine gotenberg.PDFEngine) api.Route {
 	return api.Route{
 		Method:      http.MethodPost,
 		Path:        "/forms/libreoffice/convert",
@@ -27,15 +27,17 @@ func convertRoute(uno unoconv.API, engine gotenberg.PDFEngine) api.Route {
 				landscape          bool
 				nativePageRanges   string
 				nativePDFA1aFormat bool
+				nativePDFformat    string
 				PDFformat          string
 				merge              bool
 			)
 
 			err := ctx.FormData().
-				MandatoryPaths(uno.Extensions(), &inputPaths).
+				MandatoryPaths(unoAPI.Extensions(), &inputPaths).
 				Bool("landscape", &landscape, false).
 				String("nativePageRanges", &nativePageRanges, "").
 				Bool("nativePdfA1aFormat", &nativePDFA1aFormat, false).
+				String("nativePdfFormat", &nativePDFformat, "").
 				String("pdfFormat", &PDFformat, "").
 				Bool("merge", &merge, false).
 				Validate()
@@ -44,13 +46,35 @@ func convertRoute(uno unoconv.API, engine gotenberg.PDFEngine) api.Route {
 				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 values"),
+					errors.New("got both 'pdfFormat' and 'nativePdfA1aFormat' form fields"),
-					api.NewSentinelHTTPError(http.StatusBadRequest, "Both 'pdfFormat' and 'nativePdfA1aFormat' form values are provided"),
+					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
+			}
+
 			// Alright, let's convert each document to PDF.
 
 			outputPaths := make([]string, len(inputPaths))
@@ -58,16 +82,16 @@ func convertRoute(uno unoconv.API, engine gotenberg.PDFEngine) api.Route {
 			for i, inputPath := range inputPaths {
 				outputPaths[i] = ctx.GeneratePath(".pdf")
 
-				options := unoconv.Options{
+				options := uno.Options{
 					Landscape:  landscape,
 					PageRanges: nativePageRanges,
-					PDFArchive: nativePDFA1aFormat,
+					PDFformat:  nativePDFformat,
 				}
 
-				err = uno.PDF(ctx, ctx.Log(), inputPath, outputPaths[i], options)
+				err = unoAPI.PDF(ctx, ctx.Log(), inputPath, outputPaths[i], options)
 
 				if err != nil {
-					if errors.Is(err, unoconv.ErrMalformedPageRanges) {
+					if errors.Is(err, uno.ErrMalformedPageRanges) {
 						return api.WrapError(
 							fmt.Errorf("convert to PDF: %w", err),
 							api.NewSentinelHTTPError(http.StatusBadRequest, fmt.Sprintf("Malformed page ranges '%s' (nativePageRanges)", options.PageRanges)),
@@ -92,10 +116,8 @@ func convertRoute(uno unoconv.API, engine gotenberg.PDFEngine) api.Route {
 				// Now, let's check if the client want to convert this result
 				// PDF to a specific PDF format.
 
-				// Note: nativePdfA1aFormat has not been specified if we reach
+				// Note: nativePdfA1aFormat/nativePdfFormat have not been
-				// this part of the code. Indeed, the handler returns early on
+				// specified if PDFformat is not empty.
-				// an error if both nativePdfA1aFormat and pdfFormat are
-				// present.
 
 				if PDFformat != "" {
 					convertInputPath := outputPath
@@ -135,9 +157,8 @@ func convertRoute(uno unoconv.API, engine gotenberg.PDFEngine) api.Route {
 			// 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 has not been specified if we reach this
+			// Note: nativePdfA1aFormat/nativePdfFormat have not been
-			// part of the code. Indeed, the handler returns early on an error
+			// specified if PDFformat is not empty.
-			// if both nativePdfA1aFormat and pdfFormat are present.
 
 			if PDFformat != "" {
 				convertOutputPaths := make([]string, len(outputPaths))

pkg/modules/libreoffice/uno/doc.go

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

pkg/modules/libreoffice/uno/freeport.go

@@ -0,0 +1,31 @@
+package uno
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+
+	"go.uber.org/zap"
+)
+
+func freePort(logger *zap.Logger) (int, error) {
+	netListener, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		return 0, fmt.Errorf("listen on the local network address: %w", err)
+	}
+	defer func() {
+		err := netListener.Close()
+		if err != nil {
+			logger.Error(fmt.Sprintf("close network listener: %s", err.Error()))
+		}
+	}()
+
+	addr := netListener.Addr().String()
+
+	_, portStr, err := net.SplitHostPort(addr)
+	if err != nil {
+		return 0, fmt.Errorf("get free port from host: %w", err)
+	}
+
+	return strconv.Atoi(portStr)
+}

pkg/modules/libreoffice/uno/listener.go

@@ -0,0 +1,379 @@
+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

@@ -0,0 +1,431 @@
+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

@@ -0,0 +1,36 @@
+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

@@ -0,0 +1,42 @@
+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

@@ -0,0 +1,512 @@
+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",
+	}
+}
+
+// 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

@@ -0,0 +1,817 @@
+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 := 76
+
+	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/libreoffice/unoconv/doc.go

@@ -1,2 +0,0 @@
-// Package unoconv provides a module which abstracts the CLI tool unoconv.
-package unoconv

pkg/modules/libreoffice/unoconv/unoconv.go

@@ -1,326 +0,0 @@
-package unoconv
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"net"
-	"os"
-	"strconv"
-	"strings"
-	"sync"
-
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"go.uber.org/zap"
-)
-
-func init() {
-	gotenberg.MustRegisterModule(Unoconv{})
-}
-
-// ErrMalformedPageRanges happens if the page ranges option cannot be
-// interpreted by LibreOffice.
-var ErrMalformedPageRanges = errors.New("page ranges are malformed")
-
-// Unoconv is a module which provides an API to interact with unoconv.
-type Unoconv struct {
-	binPath string
-}
-
-// 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
-
-	// PDFArchive allows to convert the resulting PDF to PDF/A-1a.
-	// In a module, prefer the Convert method from the gotenberg.PDFEngine
-	// interface.
-	// Optional.
-	PDFArchive bool
-}
-
-// API is an abstraction on top of unoconv.
-//
-// See https://github.com/unoconv/unoconv.
-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(unoconv.Provider))
-//		uno, _      := provider.(unoconv.Provider).Unoconv()
-//	}
-type Provider interface {
-	Unoconv() (API, error)
-}
-
-// Descriptor returns a Unoconv's module descriptor.
-func (Unoconv) Descriptor() gotenberg.ModuleDescriptor {
-	return gotenberg.ModuleDescriptor{
-		ID:  "unoconv",
-		New: func() gotenberg.Module { return new(Unoconv) },
-	}
-}
-
-// Provision sets the module properties. It returns an error if the environment
-// variable UNOCONV_BIN_PATH is not set.
-func (mod *Unoconv) Provision(_ *gotenberg.Context) error {
-	binPath, ok := os.LookupEnv("UNOCONV_BIN_PATH")
-	if !ok {
-		return errors.New("UNOCONV_BIN_PATH environment variable is not set")
-	}
-
-	mod.binPath = binPath
-
-	return nil
-}
-
-// Validate validates the module properties.
-func (mod Unoconv) Validate() error {
-	_, err := os.Stat(mod.binPath)
-	if os.IsNotExist(err) {
-		return fmt.Errorf("unoconv binary path does not exist: %w", err)
-	}
-
-	return nil
-}
-
-// Metrics returns the metrics.
-func (mod Unoconv) Metrics() ([]gotenberg.Metric, error) {
-	return []gotenberg.Metric{
-		{
-			Name:        "unoconv_active_instances_count",
-			Description: "Current number of active LibreOffice instances.",
-			Read: func() float64 {
-				activeInstancesCountMu.RLock()
-				defer activeInstancesCountMu.RUnlock()
-
-				return activeInstancesCount
-			},
-		},
-	}, nil
-}
-
-// Unoconv returns an API for interacting with unoconv.
-func (mod Unoconv) Unoconv() (API, error) {
-	return mod, nil
-}
-
-// PDF converts a document to PDF. It creates a dedicated LibreOffice instance
-// thanks to a custom user profile directory and a free port. Substantial calls
-// to this method may increase CPU and memory usage drastically. In such a
-// scenario, the given context may also be done before the end of the
-// conversion.
-func (mod Unoconv) PDF(ctx context.Context, logger *zap.Logger, inputPath, outputPath string, options Options) error {
-	port, err := func() (int, error) {
-		listener, err := net.Listen("tcp", "127.0.0.1:0")
-		if err != nil {
-			return 0, fmt.Errorf("listen on the local network address: %w", err)
-		}
-		defer func() {
-			err := listener.Close()
-			if err != nil {
-				logger.Error(fmt.Sprintf("close listener: %s", err.Error()))
-			}
-		}()
-
-		addr := listener.Addr().String()
-
-		_, portStr, err := net.SplitHostPort(addr)
-		if err != nil {
-			return 0, fmt.Errorf("get free port from host: %w", err)
-		}
-
-		return strconv.Atoi(portStr)
-	}()
-
-	if err != nil {
-		return fmt.Errorf("get free port: %w", err)
-	}
-
-	userProfileDirPath := gotenberg.NewDirPath()
-
-	args := []string{
-		"--user-profile",
-		fmt.Sprintf("//%s", userProfileDirPath),
-		"--port",
-		fmt.Sprintf("%d", port),
-		"--format",
-		"pdf",
-	}
-
-	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.PDFArchive {
-		args = append(args, "--export", "SelectPdfVersion=1")
-	}
-
-	args = append(args, "--output", outputPath, inputPath)
-
-	cmd, err := gotenberg.CommandContext(ctx, logger, mod.binPath, 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()
-
-	err = cmd.Exec()
-
-	activeInstancesCountMu.Lock()
-	activeInstancesCount -= 1
-	activeInstancesCountMu.Unlock()
-
-	// Always remove the user profile directory created by LibreOffice.
-	// See https://github.com/gotenberg/gotenberg/issues/192.
-	go func() {
-		logger.Debug(fmt.Sprintf("remove user profile directory '%s'", userProfileDirPath))
-
-		err := os.RemoveAll(userProfileDirPath)
-		if err != nil {
-			logger.Error(fmt.Sprintf("remove user profile directory: %s", err))
-		}
-	}()
-
-	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 strings.Contains(err.Error(), "exit status 5") && options.PageRanges != "" {
-		return ErrMalformedPageRanges
-	}
-
-	// Possible errors:
-	// 1. Unoconv/LibreOffice failed for some reason.
-	// 2. Context done.
-	//
-	// On the second scenario, LibreOffice might not had 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 with unoconv.
-func (mod Unoconv) 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",
-	}
-}
-
-var (
-	activeInstancesCount   float64
-	activeInstancesCountMu sync.RWMutex
-)
-
-// Interface guards.
-var (
-	_ gotenberg.Module          = (*Unoconv)(nil)
-	_ gotenberg.Provisioner     = (*Unoconv)(nil)
-	_ gotenberg.Validator       = (*Unoconv)(nil)
-	_ gotenberg.MetricsProvider = (*Unoconv)(nil)
-	_ API                       = (*Unoconv)(nil)
-	_ Provider                  = (*Unoconv)(nil)
-)

pkg/modules/libreoffice/unoconv/unoconv_test.go

@@ -1,175 +0,0 @@
-package unoconv
-
-import (
-	"context"
-	"os"
-	"reflect"
-	"testing"
-
-	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
-	"go.uber.org/zap"
-)
-
-func TestUnoconv_Descriptor(t *testing.T) {
-	descriptor := Unoconv{}.Descriptor()
-
-	actual := reflect.TypeOf(descriptor.New())
-	expect := reflect.TypeOf(new(Unoconv))
-
-	if actual != expect {
-		t.Errorf("expected '%'s' but got '%s'", expect, actual)
-	}
-}
-
-func TestUnoconv_Provision(t *testing.T) {
-	mod := new(Unoconv)
-	ctx := gotenberg.NewContext(gotenberg.ParsedFlags{}, nil)
-
-	err := mod.Provision(ctx)
-	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
-	}
-}
-
-func TestUnoconv_Validate(t *testing.T) {
-	for i, tc := range []struct {
-		binPath   string
-		expectErr bool
-	}{
-		{
-			expectErr: true,
-		},
-		{
-			binPath:   "/foo",
-			expectErr: true,
-		},
-		{
-			binPath: os.Getenv("UNOCONV_BIN_PATH"),
-		},
-	} {
-		mod := new(Unoconv)
-		mod.binPath = tc.binPath
-		err := mod.Validate()
-
-		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 TestChromium_Metrics(t *testing.T) {
-	metrics, err := new(Unoconv).Metrics()
-	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
-	}
-
-	if len(metrics) != 1 {
-		t.Errorf("expected %d metrics, but got %d", 1, len(metrics))
-	}
-
-	actual := metrics[0].Read()
-	if actual != 0 {
-		t.Errorf("expected %d unoconv instances, but got %f", 0, actual)
-	}
-}
-
-func TestUnoconv_Unoconv(t *testing.T) {
-	mod := new(Unoconv)
-
-	_, err := mod.Unoconv()
-	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
-	}
-}
-
-func TestUnoconv_PDF(t *testing.T) {
-	for i, tc := range []struct {
-		ctx       context.Context
-		logger    *zap.Logger
-		inputPath string
-		options   Options
-		expectErr bool
-	}{
-		{
-			logger:    zap.NewNop(),
-			expectErr: true,
-		},
-		{
-			ctx:       context.Background(),
-			logger:    zap.NewExample(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				Landscape:  true,
-				PageRanges: "1-2",
-				PDFArchive: true,
-			},
-		},
-		{
-			ctx:       context.Background(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			options: Options{
-				PageRanges: "foo",
-			},
-			expectErr: true,
-		},
-		{
-			ctx: func() context.Context {
-				ctx, cancel := context.WithCancel(context.TODO())
-				defer cancel()
-
-				return ctx
-			}(),
-			logger:    zap.NewNop(),
-			inputPath: "/tests/test/testdata/libreoffice/sample1.docx",
-			expectErr: true,
-		},
-	} {
-		func() {
-			mod := new(Unoconv)
-
-			err := mod.Provision(nil)
-			if err != nil {
-				t.Fatalf("test %d: expected error but got: %v", i, err)
-			}
-
-			outputDir, err := gotenberg.MkdirAll()
-			if err != nil {
-				t.Fatalf("test %d: expected error but got: %v", i, err)
-			}
-
-			defer func() {
-				err := os.RemoveAll(outputDir)
-				if err != nil {
-					t.Fatalf("test %d: expected no error but got: %v", i, err)
-				}
-			}()
-
-			err = mod.PDF(tc.ctx, tc.logger, tc.inputPath, outputDir+"/foo.pdf", tc.options)
-
-			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 TestUnoconv_Extensions(t *testing.T) {
-	mod := new(Unoconv)
-	extensions := mod.Extensions()
-
-	actual := len(extensions)
-	expect := 76
-
-	if actual != expect {
-		t.Errorf("expected %d extensions but got %d", expect, actual)
-	}
-}

pkg/modules/pdfengines/multi_test.go

@@ -3,213 +3,178 @@ package pdfengines
 import (
 	"context"
 	"errors"
-	"reflect"
 	"testing"
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	"go.uber.org/zap"
 )
 
-func TestNewMultiPDFEngines(t *testing.T) {
-	engine1 := &ProtoPDFEngine{
-		merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
-			return nil
-		},
-		convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-			return nil
-		},
-	}
-
-	engine2 := &ProtoPDFEngine{
-		merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
-			return errors.New("foo")
-		},
-		convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-			return errors.New("foo")
-		},
-	}
-
-	multi := newMultiPDFEngines(engine1, engine2)
-
-	if len(multi.engines) != 2 {
-		t.Fatalf("expected %d engines but got %d", 2, len(multi.engines))
-	}
-
-	if !reflect.DeepEqual(engine1, multi.engines[0]) {
-		t.Errorf("expected %v, but got: %v", engine1, multi.engines[0])
-	}
-
-	if !reflect.DeepEqual(engine2, multi.engines[1]) {
-		t.Errorf("expected %v, but got: %v", engine2, multi.engines[1])
-	}
-}
-
 func TestMultiPDFEngines_Merge(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx       context.Context
+		name           string
-		engines   []gotenberg.PDFEngine
+		engine         *multiPDFEngines
-		expectErr bool
+		ctx            context.Context
+		expectMergeErr bool
 	}{
 		{
-			ctx: context.TODO(),
+			name: "nominal behavior",
-			engines: func() []gotenberg.PDFEngine {
+			engine: newMultiPDFEngines(
-				return []gotenberg.PDFEngine{
+				gotenberg.PDFEngineMock{
-					ProtoPDFEngine{
+					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+						return nil
-							return nil
-						},
 					},
-				}
+				},
-			}(),
+			),
+			ctx: context.Background(),
 		},
 		{
-			ctx: context.TODO(),
+			name: "at least one engine does not return an error",
-			engines: func() []gotenberg.PDFEngine {
+			engine: newMultiPDFEngines(
-				return []gotenberg.PDFEngine{
+				gotenberg.PDFEngineMock{
-					ProtoPDFEngine{
+					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+						return errors.New("foo")
-							return errors.New("foo")
-						},
 					},
-					ProtoPDFEngine{
+				},
-						merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+				gotenberg.PDFEngineMock{
-							return nil
+					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						},
+						return nil
 					},
-				}
+				},
-			}(),
+			),
+			ctx: context.Background(),
 		},
 		{
-			ctx: context.TODO(),
+			name: "all engines return an error",
-			engines: func() []gotenberg.PDFEngine {
+			engine: newMultiPDFEngines(
-				return []gotenberg.PDFEngine{
+				gotenberg.PDFEngineMock{
-					ProtoPDFEngine{
+					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+						return errors.New("foo")
-							return errors.New("foo")
-						},
 					},
-					ProtoPDFEngine{
+				},
-						merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+				gotenberg.PDFEngineMock{
-							return errors.New("bar")
+					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-						},
+						return errors.New("foo")
 					},
-				}
+				},
-			}(),
+			),
-			expectErr: true,
+			ctx:            context.Background(),
+			expectMergeErr: true,
 		},
 		{
+			name: "context expired",
+			engine: newMultiPDFEngines(
+				gotenberg.PDFEngineMock{
+					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+						return nil
+					},
+				},
+			),
 			ctx: func() context.Context {
-				ctx, cancel := context.WithCancel(context.TODO())
+				ctx, cancel := context.WithCancel(context.Background())
-				defer cancel()
+				cancel()
 
 				return ctx
 			}(),
-			engines: func() []gotenberg.PDFEngine {
+			expectMergeErr: true,
-				return []gotenberg.PDFEngine{
-					ProtoPDFEngine{
-						merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
-							return nil
-						},
-					},
-				}
-			}(),
-			expectErr: true,
 		},
-	} {
+	}
-		multi := newMultiPDFEngines(tc.engines...)
-		err := multi.Merge(tc.ctx, nil, nil, "")
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			err := tc.engine.Merge(tc.ctx, zap.NewNop(), nil, "")
 
-		if !tc.expectErr && err != nil {
+			if tc.expectMergeErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Errorf("expected engine.Merge() error, but got none")
-		}
+			}
+
+			if !tc.expectMergeErr && err != nil {
+				t.Errorf("expected no error from engine.Merge(), but got: %v", err)
+			}
+		})
 	}
 }
 
 func TestMultiPDFEngines_Convert(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx       context.Context
+		name             string
-		engines   []gotenberg.PDFEngine
+		engine           *multiPDFEngines
-		expectErr bool
+		ctx              context.Context
+		expectConvertErr bool
 	}{
 		{
-			ctx: context.TODO(),
+			name: "nominal behavior",
-			engines: func() []gotenberg.PDFEngine {
+			engine: newMultiPDFEngines(
-				return []gotenberg.PDFEngine{
+				gotenberg.PDFEngineMock{
-					ProtoPDFEngine{
+					ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-						convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+						return nil
-							return nil
-						},
 					},
-				}
+				},
-			}(),
+			),
+			ctx: context.Background(),
 		},
 		{
-			ctx: context.TODO(),
+			name: "at least one engine does not return an error",
-			engines: func() []gotenberg.PDFEngine {
+			engine: newMultiPDFEngines(
-				return []gotenberg.PDFEngine{
+				gotenberg.PDFEngineMock{
-					ProtoPDFEngine{
+					ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-						convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+						return errors.New("foo")
-							return errors.New("foo")
-						},
 					},
-					ProtoPDFEngine{
+				},
-						convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+				gotenberg.PDFEngineMock{
-							return nil
+					ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-						},
+						return nil
 					},
-				}
+				},
-			}(),
+			),
+			ctx: context.Background(),
 		},
 		{
-			ctx: context.TODO(),
+			name: "all engines return an error",
-			engines: func() []gotenberg.PDFEngine {
+			engine: newMultiPDFEngines(
-				return []gotenberg.PDFEngine{
+				gotenberg.PDFEngineMock{
-					ProtoPDFEngine{
+					ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-						convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+						return errors.New("foo")
-							return errors.New("foo")
-						},
 					},
-					ProtoPDFEngine{
+				},
-						convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+				gotenberg.PDFEngineMock{
-							return errors.New("bar")
+					ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-						},
+						return errors.New("foo")
 					},
-				}
+				},
-			}(),
+			),
-			expectErr: true,
+			ctx:              context.Background(),
+			expectConvertErr: true,
 		},
 		{
+			name: "context expired",
+			engine: newMultiPDFEngines(
+				gotenberg.PDFEngineMock{
+					ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+						return nil
+					},
+				},
+			),
 			ctx: func() context.Context {
-				ctx, cancel := context.WithCancel(context.TODO())
+				ctx, cancel := context.WithCancel(context.Background())
-				defer cancel()
+				cancel()
 
 				return ctx
 			}(),
-			engines: func() []gotenberg.PDFEngine {
+			expectConvertErr: true,
-				return []gotenberg.PDFEngine{
-					ProtoPDFEngine{
-						convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-							return nil
-						},
-					},
-				}
-			}(),
-			expectErr: true,
 		},
-	} {
+	}
-		multi := newMultiPDFEngines(tc.engines...)
-		err := multi.Convert(tc.ctx, nil, "", "", "")
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			err := tc.engine.Convert(tc.ctx, zap.NewNop(), "", "", "")
 
-		if !tc.expectErr && err != nil {
+			if tc.expectConvertErr && err == nil {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+				t.Errorf("expected engine.Convert() error, but got none")
-		}
+			}
+
+			if !tc.expectConvertErr && err != nil {
+				t.Errorf("expected no error from engine.Convert(), but got: %v", err)
+			}
+		})
 	}
 }

pkg/modules/pdfengines/pdfengines.go

@@ -3,6 +3,7 @@ package pdfengines
 import (
 	"errors"
 	"fmt"
+	"strings"
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
@@ -36,7 +37,7 @@ func (PDFEngines) Descriptor() gotenberg.ModuleDescriptor {
 		ID: "pdfengines",
 		FlagSet: func() *flag.FlagSet {
 			fs := flag.NewFlagSet("pdfengines", flag.ExitOnError)
-			fs.StringSlice("pdfengines-engines", make([]string, 0), "Set the PDF engines - all by default")
+			fs.StringSlice("pdfengines-engines", make([]string, 0), "Set the PDF engines and their order - all by default")
 			fs.Bool("pdfengines-disable-routes", false, "Disable the routes")
 
 			return fs
@@ -52,6 +53,18 @@ func (mod *PDFEngines) Provision(ctx *gotenberg.Context) error {
 	names := flags.MustStringSlice("pdfengines-engines")
 	mod.disableRoutes = flags.MustBool("pdfengines-disable-routes")
 
+	loggerProvider, err := ctx.Module(new(gotenberg.LoggerProvider))
+	if err != nil {
+		return fmt.Errorf("get logger provider: %w", err)
+	}
+
+	logger, err := loggerProvider.(gotenberg.LoggerProvider).Logger(mod)
+	if err != nil {
+		return fmt.Errorf("get logger: %w", err)
+	}
+
+	logger = logger.Named("pdfengines")
+
 	engines, err := ctx.Modules(new(gotenberg.PDFEngine))
 	if err != nil {
 		return fmt.Errorf("get PDF engines: %w", err)
@@ -67,6 +80,13 @@ func (mod *PDFEngines) Provision(ctx *gotenberg.Context) error {
 		// Selection from user.
 		mod.names = names
 
+		for i, name := range names {
+			logger.Warn("unoconv-pdfengine is deprecated; prefer uno-pdfengine instead")
+			if name == "unoconv-pdfengine" {
+				mod.names[i] = "uno-pdfengine"
+			}
+		}
+
 		return nil
 	}
 
@@ -118,14 +138,25 @@ func (mod PDFEngines) Validate() error {
 	return fmt.Errorf("non-existing PDF engine(s): %s - available PDF engine(s): %s", nonExistingEngines, availableEngines)
 }
 
+// SystemMessages returns one message with the selected gotenberg.PDFEngine
+// modules.
+func (mod PDFEngines) SystemMessages() []string {
+	return []string{
+		strings.Join(mod.names[:], " "),
+	}
+}
+
 // PDFEngine returns a gotenberg.PDFEngine.
 func (mod PDFEngines) PDFEngine() (gotenberg.PDFEngine, error) {
-	engines := make([]gotenberg.PDFEngine, len(mod.engines))
+	engines := make([]gotenberg.PDFEngine, len(mod.names))
 
-	i := 0
+	for i, name := range mod.names {
-	for _, engine := range mod.engines {
+		for _, engine := range mod.engines {
-		engines[i] = engine
+			if name == engine.(gotenberg.Module).Descriptor().ID {
-		i++
+				engines[i] = engine
+				break
+			}
+		}
 	}
 
 	return newMultiPDFEngines(engines...), nil
@@ -155,6 +186,7 @@ var (
 	_ gotenberg.Module            = (*PDFEngines)(nil)
 	_ gotenberg.Provisioner       = (*PDFEngines)(nil)
 	_ gotenberg.Validator         = (*PDFEngines)(nil)
+	_ gotenberg.SystemLogger      = (*PDFEngines)(nil)
 	_ gotenberg.PDFEngineProvider = (*PDFEngines)(nil)
 	_ api.Router                  = (*PDFEngines)(nil)
 )

pkg/modules/pdfengines/pdfengines_test.go

@@ -1,47 +1,16 @@
 package pdfengines
 
 import (
-	"context"
 	"errors"
 	"reflect"
+	"strings"
 	"testing"
 
 	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
 	"go.uber.org/zap"
 )
 
-type ProtoModule struct {
+func TestPDFEngines_Descriptor(t *testing.T) {
-	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 ProtoPDFEngine struct {
-	ProtoValidator
-	merge   func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error
-	convert func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error
-}
-
-func (mod ProtoPDFEngine) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-	return mod.merge(ctx, logger, inputPaths, outputPath)
-}
-
-func (mod ProtoPDFEngine) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-	return mod.convert(ctx, logger, format, inputPath, outputPath)
-}
-
-func TestPDFEngine_Descriptor(t *testing.T) {
 	descriptor := PDFEngines{}.Descriptor()
 
 	actual := reflect.TypeOf(descriptor.New())
@@ -52,71 +21,98 @@ func TestPDFEngine_Descriptor(t *testing.T) {
 	}
 }
 
-func TestPDFEngine_Provision(t *testing.T) {
+func TestPDFEngines_Provision(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx                *gotenberg.Context
+		name                 string
-		expectNames        []string
+		ctx                  *gotenberg.Context
-		expectEnginesCount int
+		expectPDFEngineNames []string
-		expectErr          bool
+		expectProvisionErr   bool
 	}{
 		{
+			name: "no selection from user",
 			ctx: func() *gotenberg.Context {
-				engine := struct{ ProtoPDFEngine }{}
+				provider := struct {
-				engine.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return engine }}
+					gotenberg.LoggerProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
+				}
+				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
+					return zap.NewNop(), nil
+				}
+
+				engine := struct {
+					gotenberg.ModuleMock
+					gotenberg.ValidatorMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return engine }}
+				}
+				engine.ValidateMock = func() error {
+					return nil
 				}
-				engine.validate = func() error { return errors.New("foo") }
 
 				return gotenberg.NewContext(
 					gotenberg.ParsedFlags{
 						FlagSet: new(PDFEngines).Descriptor().FlagSet,
 					},
 					[]gotenberg.ModuleDescriptor{
+						provider.Descriptor(),
 						engine.Descriptor(),
 					},
 				)
 			}(),
-			expectErr: true,
+			expectPDFEngineNames: []string{"bar"},
 		},
 		{
+			name: "selection from user",
 			ctx: func() *gotenberg.Context {
-				engine := struct{ ProtoPDFEngine }{}
+				provider := struct {
-				engine.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return engine }}
+					gotenberg.LoggerProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
+				}
+				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
+					return zap.NewNop(), nil
 				}
-				engine.validate = func() error { return nil }
 
-				return gotenberg.NewContext(
+				engine1 := struct {
-					gotenberg.ParsedFlags{
+					gotenberg.ModuleMock
-						FlagSet: new(PDFEngines).Descriptor().FlagSet,
+					gotenberg.ValidatorMock
-					},
+					gotenberg.PDFEngineMock
-					[]gotenberg.ModuleDescriptor{
+				}{}
-						engine.Descriptor(),
+				engine1.DescriptorMock = func() gotenberg.ModuleDescriptor {
-					},
-				)
-			}(),
-			expectNames:        []string{"foo"},
-			expectEnginesCount: 1,
-		},
-		{
-			ctx: func() *gotenberg.Context {
-				engine1 := struct{ ProtoPDFEngine }{}
-				engine1.descriptor = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "a", New: func() gotenberg.Module { return engine1 }}
 				}
-				engine1.validate = func() error { return nil }
+				engine1.ValidateMock = func() error {
+					return nil
+				}
 
-				engine2 := struct{ ProtoPDFEngine }{}
+				engine2 := struct {
-				engine2.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
+					gotenberg.ValidatorMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine2.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "b", New: func() gotenberg.Module { return engine2 }}
 				}
-				engine2.validate = func() error { return nil }
+				engine2.ValidateMock = func() error {
+					return nil
+				}
 
 				fs := new(PDFEngines).Descriptor().FlagSet
 				err := fs.Parse([]string{"--pdfengines-engines=b", "--pdfengines-engines=a"})
 
 				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
+					t.Fatalf("expected no error from fs.Parse(), but got: %v", err)
 				}
 
 				return gotenberg.NewContext(
@@ -124,33 +120,47 @@ func TestPDFEngine_Provision(t *testing.T) {
 						FlagSet: fs,
 					},
 					[]gotenberg.ModuleDescriptor{
+						provider.Descriptor(),
 						engine1.Descriptor(),
 						engine2.Descriptor(),
 					},
 				)
 			}(),
-			expectNames:        []string{"b", "a"},
+			expectPDFEngineNames: []string{"b", "a"},
-			expectEnginesCount: 2,
 		},
 		{
+			name: "user select deprecated unoconv-pdfengine",
 			ctx: func() *gotenberg.Context {
-				engine1 := struct{ ProtoPDFEngine }{}
+				provider := struct {
-				engine1.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "a", New: func() gotenberg.Module { return engine1 }}
+					gotenberg.LoggerProviderMock
+				}{}
+				provider.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module {
+						return provider
+					}}
+				}
+				provider.LoggerMock = func(mod gotenberg.Module) (*zap.Logger, error) {
+					return zap.NewNop(), nil
 				}
-				engine1.validate = func() error { return nil }
 
-				engine2 := struct{ ProtoPDFEngine }{}
+				engine := struct {
-				engine2.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
-					return gotenberg.ModuleDescriptor{ID: "b", New: func() gotenberg.Module { return engine2 }}
+					gotenberg.ValidatorMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "uno-pdfengine", New: func() gotenberg.Module { return engine }}
+				}
+				engine.ValidateMock = func() error {
+					return nil
 				}
-				engine2.validate = func() error { return nil }
 
 				fs := new(PDFEngines).Descriptor().FlagSet
-				err := fs.Parse([]string{"--pdfengines-engines=b"})
+				err := fs.Parse([]string{"--pdfengines-engines=unoconv-pdfengine"})
 
 				if err != nil {
-					t.Fatalf("expected error but got: %v", err)
+					t.Fatalf("expected no error from fs.Parse(), but got: %v", err)
 				}
 
 				return gotenberg.NewContext(
@@ -158,56 +168,136 @@ func TestPDFEngine_Provision(t *testing.T) {
 						FlagSet: fs,
 					},
 					[]gotenberg.ModuleDescriptor{
-						engine1.Descriptor(),
+						provider.Descriptor(),
-						engine2.Descriptor(),
+						engine.Descriptor(),
 					},
 				)
 			}(),
-			expectNames:        []string{"b"},
+			expectPDFEngineNames: []string{"uno-pdfengine"},
-			expectEnginesCount: 2,
 		},
-	} {
+		{
-		mod := new(PDFEngines)
+			name: "no logger provider",
-		err := mod.Provision(tc.ctx)
+			ctx: func() *gotenberg.Context {
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: new(PDFEngines).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")
+				}
 
-		if tc.expectErr && err == nil {
+				return gotenberg.NewContext(
-			t.Errorf("test %d: expected error but got: %v", i, err)
+					gotenberg.ParsedFlags{
-		}
+						FlagSet: new(PDFEngines).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{
+						provider.Descriptor(),
+					},
+				)
+			}(),
+			expectProvisionErr: true,
+		},
+		{
+			name: "no valid PDF engines",
+			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
+				}
 
-		if !tc.expectErr && err != nil {
+				engine := struct {
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+					gotenberg.ModuleMock
-		}
+					gotenberg.ValidatorMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine.DescriptorMock = func() gotenberg.ModuleDescriptor {
+					return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return engine }}
+				}
+				engine.ValidateMock = func() error {
+					return errors.New("foo")
+				}
 
-		if len(tc.expectNames) != len(mod.names) {
+				return gotenberg.NewContext(
-			t.Errorf("test %d: expected %d names but got %d", i, len(tc.expectNames), len(mod.names))
+					gotenberg.ParsedFlags{
-		}
+						FlagSet: new(PDFEngines).Descriptor().FlagSet,
+					},
+					[]gotenberg.ModuleDescriptor{
+						provider.Descriptor(),
+						engine.Descriptor(),
+					},
+				)
+			}(),
+			expectProvisionErr: true,
+		},
+	}
 
-		if tc.expectEnginesCount != len(mod.engines) {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected %d engines but got %d", i, tc.expectEnginesCount, len(mod.engines))
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			mod := new(PDFEngines)
+			err := mod.Provision(tc.ctx)
 
-		for index, name := range mod.names {
+			if tc.expectProvisionErr && err == nil {
-			if name != tc.expectNames[index] {
+				t.Fatal("expected mod.Provision() error, but got none")
-				t.Errorf("test %d: expected name at index %d to be %s, but got: %s", i, index, name, tc.expectNames[index])
 			}
-		}
+
+			if !tc.expectProvisionErr && err != nil {
+				t.Fatalf("expected no error from mod.Provision(), but got: %v", err)
+			}
+
+			if len(tc.expectPDFEngineNames) != len(mod.names) {
+				t.Errorf("expected %d names but got %d", len(tc.expectPDFEngineNames), len(mod.names))
+			}
+
+			for index, name := range mod.names {
+				if name != tc.expectPDFEngineNames[index] {
+					t.Errorf("expected name at index %d to be %s, but got: %s", index, name, tc.expectPDFEngineNames[index])
+				}
+			}
+		})
 	}
 }
 
-func TestPDFEngine_Validate(t *testing.T) {
+func TestPDFEngines_Validate(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		names     []string
+		name              string
-		engines   []gotenberg.PDFEngine
+		names             []string
-		expectErr bool
+		engines           []gotenberg.PDFEngine
+		expectValidateErr bool
 	}{
 		{
-			expectErr: true,
+			name:  "existing PDF engine",
-		},
-		{
 			names: []string{"foo"},
 			engines: func() []gotenberg.PDFEngine {
-				engine := struct{ ProtoPDFEngine }{}
+				engine := struct {
-				engine.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return engine }}
 				}
 
@@ -217,15 +307,22 @@ func TestPDFEngine_Validate(t *testing.T) {
 			}(),
 		},
 		{
+			name:  "non-existing bar PDF engine",
 			names: []string{"foo", "bar", "baz"},
 			engines: func() []gotenberg.PDFEngine {
-				engine1 := struct{ ProtoPDFEngine }{}
+				engine1 := struct {
-				engine1.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine1.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return engine1 }}
 				}
 
-				engine2 := struct{ ProtoPDFEngine }{}
+				engine2 := struct {
-				engine2.descriptor = func() gotenberg.ModuleDescriptor {
+					gotenberg.ModuleMock
+					gotenberg.PDFEngineMock
+				}{}
+				engine2.DescriptorMock = func() gotenberg.ModuleDescriptor {
 					return gotenberg.ModuleDescriptor{ID: "baz", New: func() gotenberg.Module { return engine2 }}
 				}
 
@@ -234,71 +331,115 @@ func TestPDFEngine_Validate(t *testing.T) {
 					engine2,
 				}
 			}(),
-			expectErr: true,
+			expectValidateErr: true,
 		},
-	} {
+		{
-		mod := new(PDFEngines)
+			name:              "no PDF engine",
-		mod.names = tc.names
+			expectValidateErr: true,
-		mod.engines = tc.engines
+		},
-		err := mod.Validate()
+	}
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			mod := PDFEngines{
+				names:   tc.names,
+				engines: tc.engines,
+			}
 
-		if !tc.expectErr && err != nil {
+			err := mod.Validate()
-			t.Errorf("test %d: expected no error but got: %v", i, err)
+
-		}
+			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 TestPDFEngine_PDFEngine(t *testing.T) {
+func TestPDFEngines_SystemMessages(t *testing.T) {
 	mod := new(PDFEngines)
-	mod.engines = []gotenberg.PDFEngine{
+	mod.names = []string{"foo", "bar"}
-		struct{ ProtoPDFEngine }{},
+
+	messages := mod.SystemMessages()
+	if len(messages) != 1 {
+		t.Errorf("expected one and only one message from mod.SystemMessages(), but got %d", len(messages))
+	}
+
+	expect := strings.Join(mod.names[:], " ")
+	if messages[0] != expect {
+		t.Errorf("expected message '%s' from mod.SystemMessages(), but got '%s'", expect, messages[0])
+	}
+}
+
+func TestPDFEngines_PDFEngine(t *testing.T) {
+	mod := PDFEngines{
+		names: []string{"foo", "bar"},
+		engines: func() []gotenberg.PDFEngine {
+			engine1 := struct {
+				gotenberg.ModuleMock
+				gotenberg.PDFEngineMock
+			}{}
+			engine1.DescriptorMock = func() gotenberg.ModuleDescriptor {
+				return gotenberg.ModuleDescriptor{ID: "foo", New: func() gotenberg.Module { return engine1 }}
+			}
+
+			engine2 := struct {
+				gotenberg.ModuleMock
+				gotenberg.PDFEngineMock
+			}{}
+			engine2.DescriptorMock = func() gotenberg.ModuleDescriptor {
+				return gotenberg.ModuleDescriptor{ID: "bar", New: func() gotenberg.Module { return engine2 }}
+			}
+
+			return []gotenberg.PDFEngine{
+				engine1,
+				engine2,
+			}
+		}(),
 	}
 
 	_, err := mod.PDFEngine()
 	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
+		t.Errorf("expected no error from mod.PDFEngine, but got: %v", err)
 	}
 }
 
-func TestPDFEngine_Routes(t *testing.T) {
+func TestPDFEngines_Routes(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		expectRoutes  int
+		name              string
-		disableRoutes bool
+		mod               PDFEngines
+		expectRoutesCount int
 	}{
 		{
-			expectRoutes: 2,
+			name: "route not disabled",
+			mod: PDFEngines{
+				engines: []gotenberg.PDFEngine{
+					gotenberg.PDFEngineMock{},
+				},
+			},
+			expectRoutesCount: 2,
 		},
 		{
-			disableRoutes: true,
+			name: "route disabled",
+			mod: PDFEngines{
+				disableRoutes: true,
+			},
 		},
-	} {
+	}
-		mod := new(PDFEngines)
-		mod.engines = []gotenberg.PDFEngine{
-			struct{ ProtoPDFEngine }{},
-		}
-		mod.disableRoutes = tc.disableRoutes
 
-		routes, err := mod.Routes()
+	for _, tc := range tests {
-		if err != nil {
+		t.Run(tc.name, func(t *testing.T) {
-			t.Fatalf("test %d: expected no error but got: %v", i, err)
+			routes, err := tc.mod.Routes()
-		}
+			if err != nil {
+				t.Fatalf("expected no error from mod.Routes(), but got: %v", err)
+			}
 
-		if tc.expectRoutes != len(routes) {
+			if tc.expectRoutesCount != len(routes) {
-			t.Errorf("test %d: expected %d routes but got %d", i, tc.expectRoutes, len(routes))
+				t.Errorf("expected %d routes from mod.Routes(), but got %d", tc.expectRoutesCount, len(routes))
-		}
+			}
+		})
 	}
 }
-
-// Interface guards.
-var (
-	_ gotenberg.Module    = (*ProtoModule)(nil)
-	_ gotenberg.Validator = (*ProtoValidator)(nil)
-	_ gotenberg.Module    = (*ProtoValidator)(nil)
-	_ gotenberg.PDFEngine = (*ProtoPDFEngine)(nil)
-	_ gotenberg.Module    = (*ProtoPDFEngine)(nil)
-	_ gotenberg.Validator = (*ProtoPDFEngine)(nil)
-)

pkg/modules/pdfengines/routes_test.go

@@ -13,8 +13,9 @@ import (
 )
 
 func TestMergeHandler(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx                    *api.MockContext
+		name                   string
+		ctx                    *api.ContextMock
 		engine                 gotenberg.PDFEngine
 		expectErr              bool
 		expectHTTPErr          bool
@@ -22,34 +23,75 @@ func TestMergeHandler(t *testing.T) {
 		expectOutputPathsCount int
 	}{
 		{
-			ctx:              &api.MockContext{Context: &api.Context{}},
+			name: "nominal behavior",
-			expectErr:        true,
+			ctx: func() *api.ContextMock {
-			expectHTTPErr:    true,
+				ctx := &api.ContextMock{Context: &api.Context{}}
-			expectHTTPStatus: http.StatusBadRequest,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-
 				ctx.SetFiles(map[string]string{
 					"foo.pdf": "/foo/foo.pdf",
 				})
 
 				return ctx
 			}(),
-			engine: func() gotenberg.PDFEngine {
+			engine: gotenberg.PDFEngineMock{
-				return &ProtoPDFEngine{
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+					return nil
-						return errors.New("foo")
+				},
-					},
+			},
-				}
+			expectOutputPathsCount: 1,
+		},
+		{
+			name:             "invalid form data: no PDF",
+			ctx:              &api.ContextMock{Context: &api.Context{}},
+			expectErr:        true,
+			expectHTTPErr:    true,
+			expectHTTPStatus: http.StatusBadRequest,
+		},
+		{
+			name: "merge fail",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+				})
+
+				return ctx
 			}(),
+			engine: gotenberg.PDFEngineMock{
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					return errors.New("foo")
+				},
+			},
 			expectErr: true,
 		},
 		{
-			ctx: func() *api.MockContext {
+			name: "nominal behavior with a PDF format",
-				ctx := &api.MockContext{Context: &api.Context{}}
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+				})
+				ctx.SetValues(map[string][]string{
+					"pdfFormat": {
+						gotenberg.FormatPDFA1a,
+					},
+				})
 
+				return ctx
+			}(),
+			engine: gotenberg.PDFEngineMock{
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					return nil
+				},
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+					return nil
+				},
+			},
+			expectOutputPathsCount: 1,
+		},
+		{
+			name: "convert to PDF format fail",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"foo.pdf": "/foo/foo.pdf",
 				})
@@ -61,24 +103,20 @@ func TestMergeHandler(t *testing.T) {
 
 				return ctx
 			}(),
-			engine: func() gotenberg.PDFEngine {
+			engine: gotenberg.PDFEngineMock{
-				return &ProtoPDFEngine{
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+					return nil
-						return nil
+				},
-					},
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+					return errors.New("foo")
-						return gotenberg.ErrPDFFormatNotAvailable
+				},
-					},
+			},
-				}
+			expectErr: true,
-			}(),
-			expectErr:        true,
-			expectHTTPErr:    true,
-			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			name: "invalid PDF format",
-				ctx := &api.MockContext{Context: &api.Context{}}
+			ctx: func() *api.ContextMock {
-
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"foo.pdf": "/foo/foo.pdf",
 				})
@@ -90,125 +128,82 @@ func TestMergeHandler(t *testing.T) {
 
 				return ctx
 			}(),
-			engine: func() gotenberg.PDFEngine {
+			engine: gotenberg.PDFEngineMock{
-				return &ProtoPDFEngine{
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+					return nil
-						return nil
+				},
-					},
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+					return gotenberg.ErrPDFFormatNotAvailable
-						return errors.New("foo")
+				},
-					},
+			},
-				}
+			expectErr:        true,
-			}(),
+			expectHTTPErr:    true,
-			expectErr: true,
+			expectHTTPStatus: http.StatusBadRequest,
 		},
 		{
-			ctx: func() *api.MockContext {
+			name: "cannot add output paths",
-				ctx := &api.MockContext{Context: &api.Context{}}
+			ctx: func() *api.ContextMock {
-
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+				})
 				ctx.SetCancelled(true)
-				ctx.SetFiles(map[string]string{
-					"foo.pdf": "/foo/foo.pdf",
-				})
 
 				return ctx
 			}(),
-			engine: func() gotenberg.PDFEngine {
+			engine: gotenberg.PDFEngineMock{
-				return &ProtoPDFEngine{
+				MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
+					return nil
-						return nil
+				},
-					},
+			},
-				}
-			}(),
 			expectErr: true,
 		},
-		{
+	}
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
 
-				ctx.SetFiles(map[string]string{
+	for _, tc := range tests {
-					"foo.pdf": "/foo/foo.pdf",
+		t.Run(tc.name, func(t *testing.T) {
-				})
+			c := echo.New().NewContext(nil, nil)
-				ctx.SetValues(map[string][]string{
+			c.Set("context", tc.ctx.Context)
-					"pdfFormat": {
-						"foo",
-					},
-				})
 
-				return ctx
+			err := mergeRoute(tc.engine).Handler(c)
-			}(),
-			engine: func() gotenberg.PDFEngine {
-				return &ProtoPDFEngine{
-					merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
-						return nil
-					},
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-						return nil
-					},
-				}
-			}(),
-			expectOutputPathsCount: 1,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
 
-				ctx.SetFiles(map[string]string{
+			if tc.expectErr && err == nil {
-					"foo.pdf": "/foo/foo.pdf",
+				t.Fatal("expected error from merge handler, but got none")
-				})
-
-				return ctx
-			}(),
-			engine: func() gotenberg.PDFEngine {
-				return &ProtoPDFEngine{
-					merge: func(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
-						return nil
-					},
-				}
-			}(),
-			expectOutputPathsCount: 1,
-		},
-	} {
-		c := echo.New().NewContext(nil, nil)
-		c.Set("context", tc.ctx.Context)
-
-		err := mergeRoute(tc.engine).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 api.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.expectOutputPathsCount != len(tc.ctx.OutputPaths()) {
+			if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected %d output paths but got %d", i, tc.expectOutputPathsCount, len(tc.ctx.OutputPaths()))
+				t.Fatalf("expected no error from merge handler, but got: %v", err)
-		}
+			}
+
+			var httpErr api.HTTPError
+			isHTTPErr := errors.As(err, &httpErr)
+
+			if tc.expectHTTPErr && !isHTTPErr {
+				t.Errorf("expected HTTP error from merge handler, but got: %v", err)
+			}
+
+			if !tc.expectHTTPErr && isHTTPErr {
+				t.Errorf("expected no HTTP error from merge handler, but got one: %v", httpErr)
+			}
+
+			if err != nil && tc.expectHTTPErr && isHTTPErr {
+				status, _ := httpErr.HTTPError()
+				if status != tc.expectHTTPStatus {
+					t.Errorf("expected %d HTTP status code from merge handler, but got %d", tc.expectHTTPStatus, status)
+				}
+			}
+
+			if tc.expectOutputPathsCount != len(tc.ctx.OutputPaths()) {
+				t.Errorf("expected %d output paths from merge handler, but got %d", tc.expectOutputPathsCount, len(tc.ctx.OutputPaths()))
+			}
+		})
 	}
 }
 
 func TestConvertHandler(t *testing.T) {
-	for i, tc := range []struct {
+	tests := []struct {
-		ctx                    *api.MockContext
+		name                   string
+		ctx                    *api.ContextMock
 		engine                 gotenberg.PDFEngine
 		expectErr              bool
 		expectHTTPErr          bool
@@ -216,132 +211,109 @@ func TestConvertHandler(t *testing.T) {
 		expectOutputPathsCount int
 	}{
 		{
-			ctx:              &api.MockContext{Context: &api.Context{}},
+			name: "nominal behavior",
-			expectErr:        true,
+			ctx: func() *api.ContextMock {
-			expectHTTPErr:    true,
+				ctx := &api.ContextMock{Context: &api.Context{}}
-			expectHTTPStatus: http.StatusBadRequest,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-				ctx.SetValues(map[string][]string{
-					"pdfFormat": {
-						"foo",
-					},
-				})
-
-				return ctx
-			}(),
-			expectErr:        true,
-			expectHTTPErr:    true,
-			expectHTTPStatus: http.StatusBadRequest,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-
 				ctx.SetFiles(map[string]string{
 					"foo.pdf": "/foo/foo.pdf",
 				})
 				ctx.SetValues(map[string][]string{
 					"pdfFormat": {
-						"foo",
+						gotenberg.FormatPDFA1a,
 					},
 				})
 
 				return ctx
 			}(),
-			engine: func() gotenberg.PDFEngine {
+			engine: gotenberg.PDFEngineMock{
-				return &ProtoPDFEngine{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+					return nil
-						return gotenberg.ErrPDFFormatNotAvailable
+				},
-					},
+			},
-				}
-			}(),
-			expectErr:        true,
-			expectHTTPErr:    true,
-			expectHTTPStatus: http.StatusBadRequest,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-
-				ctx.SetFiles(map[string]string{
-					"foo.pdf": "/foo/foo.pdf",
-				})
-				ctx.SetValues(map[string][]string{
-					"pdfFormat": {
-						"foo",
-					},
-				})
-
-				return ctx
-			}(),
-			engine: func() gotenberg.PDFEngine {
-				return &ProtoPDFEngine{
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-						return errors.New("foo")
-					},
-				}
-			}(),
-			expectErr: true,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-
-				ctx.SetCancelled(true)
-				ctx.SetFiles(map[string]string{
-					"foo.pdf": "/foo/foo.pdf",
-				})
-				ctx.SetValues(map[string][]string{
-					"pdfFormat": {
-						"foo",
-					},
-				})
-
-				return ctx
-			}(),
-			engine: func() gotenberg.PDFEngine {
-				return &ProtoPDFEngine{
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-						return nil
-					},
-				}
-			}(),
-			expectErr: true,
-		},
-		{
-			ctx: func() *api.MockContext {
-				ctx := &api.MockContext{Context: &api.Context{}}
-
-				ctx.SetFiles(map[string]string{
-					"foo.pdf": "/foo/foo.pdf",
-				})
-				ctx.SetValues(map[string][]string{
-					"pdfFormat": {
-						"foo",
-					},
-				})
-
-				return ctx
-			}(),
-			engine: func() gotenberg.PDFEngine {
-				return &ProtoPDFEngine{
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
-						return nil
-					},
-				}
-			}(),
 			expectOutputPathsCount: 1,
 		},
 		{
-			ctx: func() *api.MockContext {
+			name: "nominal behavior, but with 3 PDFs",
-				ctx := &api.MockContext{Context: &api.Context{}}
+			ctx: func() *api.ContextMock {
-
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+					"bar.pdf": "/bar/bar.pdf",
+					"baz.pdf": "/baz/baz.pdf",
+				})
+				ctx.SetValues(map[string][]string{
+					"pdfFormat": {
+						gotenberg.FormatPDFA1a,
+					},
+				})
+
+				return ctx
+			}(),
+			engine: gotenberg.PDFEngineMock{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+					return nil
+				},
+			},
+			expectOutputPathsCount: 3,
+		},
+		{
+			name: "invalid form data: no PDF",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetValues(map[string][]string{
+					"pdfFormat": {
+						gotenberg.FormatPDFA1a,
+					},
+				})
+
+				return ctx
+			}(),
+			expectErr:        true,
+			expectHTTPErr:    true,
+			expectHTTPStatus: http.StatusBadRequest,
+		},
+		{
+			name: "invalid form data: no PDF format",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+				})
+
+				return ctx
+			}(),
+			expectErr:        true,
+			expectHTTPErr:    true,
+			expectHTTPStatus: http.StatusBadRequest,
+		},
+		{
+			name: "convert to PDF format fail",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+				})
+				ctx.SetValues(map[string][]string{
+					"pdfFormat": {
+						gotenberg.FormatPDFA1a,
+					},
+				})
+
+				return ctx
+			}(),
+			engine: gotenberg.PDFEngineMock{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+					return errors.New("foo")
+				},
+			},
+			expectErr: true,
+		},
+		{
+			name: "PDF format not available",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
 				ctx.SetFiles(map[string]string{
 					"foo.pdf": "/foo/foo.pdf",
-					"bar.pdf": "/foo/bar.pdf",
 				})
 				ctx.SetValues(map[string][]string{
 					"pdfFormat": {
@@ -351,49 +323,76 @@ func TestConvertHandler(t *testing.T) {
 
 				return ctx
 			}(),
-			engine: func() gotenberg.PDFEngine {
+			engine: gotenberg.PDFEngineMock{
-				return &ProtoPDFEngine{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
-					convert: func(_ context.Context, _ *zap.Logger, _, _, _ string) error {
+					return gotenberg.ErrPDFFormatNotAvailable
-						return nil
+				},
-					},
+			},
-				}
+			expectErr:        true,
-			}(),
+			expectHTTPErr:    true,
-			expectOutputPathsCount: 2,
+			expectHTTPStatus: http.StatusBadRequest,
 		},
-	} {
+		{
-		c := echo.New().NewContext(nil, nil)
+			name: "cannot add output paths",
-		c.Set("context", tc.ctx.Context)
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: &api.Context{}}
+				ctx.SetFiles(map[string]string{
+					"foo.pdf": "/foo/foo.pdf",
+				})
+				ctx.SetValues(map[string][]string{
+					"pdfFormat": {
+						gotenberg.FormatPDFA1a,
+					},
+				})
+				ctx.SetCancelled(true)
 
-		err := convertRoute(tc.engine).Handler(c)
+				return ctx
+			}(),
+			engine: gotenberg.PDFEngineMock{
+				ConvertMock: func(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
+					return nil
+				},
+			},
+			expectErr: true,
+		},
+	}
 
-		if tc.expectErr && err == nil {
+	for _, tc := range tests {
-			t.Errorf("test %d: expected error but got: %v", i, err)
+		t.Run(tc.name, func(t *testing.T) {
-		}
+			c := echo.New().NewContext(nil, nil)
+			c.Set("context", tc.ctx.Context)
 
-		if !tc.expectErr && err != nil {
+			err := convertRoute(tc.engine).Handler(c)
-			t.Errorf("test %d: expected no error but got: %v", i, err)
-		}
 
-		var httpErr api.HTTPError
+			if tc.expectErr && err == nil {
-		isHTTPErr := errors.As(err, &httpErr)
+				t.Fatal("expected error from convert handler, but got none")
-
-		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.expectOutputPathsCount != len(tc.ctx.OutputPaths()) {
+			if !tc.expectErr && err != nil {
-			t.Errorf("test %d: expected %d output paths but got %d", i, tc.expectOutputPathsCount, len(tc.ctx.OutputPaths()))
+				t.Fatalf("expected no error from convert handler, but got: %v", err)
-		}
+			}
+
+			var httpErr api.HTTPError
+			isHTTPErr := errors.As(err, &httpErr)
+
+			if tc.expectHTTPErr && !isHTTPErr {
+				t.Errorf("expected HTTP error from convert handler, but got: %v", err)
+			}
+
+			if !tc.expectHTTPErr && isHTTPErr {
+				t.Errorf("expected no HTTP error from convert handler, but got one: %v", httpErr)
+			}
+
+			if err != nil && tc.expectHTTPErr && isHTTPErr {
+				status, _ := httpErr.HTTPError()
+				if status != tc.expectHTTPStatus {
+					t.Errorf("expected %d HTTP status code from convert handler, but got %d", tc.expectHTTPStatus, status)
+				}
+			}
+
+			if tc.expectOutputPathsCount != len(tc.ctx.OutputPaths()) {
+				t.Errorf("expected %d output paths from convert handler, but got %d", tc.expectOutputPathsCount, len(tc.ctx.OutputPaths()))
+			}
+		})
 	}
 }

pkg/modules/pdftk/pdftk.go

@@ -83,7 +83,7 @@ func (engine PDFtk) Merge(ctx context.Context, logger *zap.Logger, inputPaths []
 	activeInstancesCount += 1
 	activeInstancesCountMu.Unlock()
 
-	err = cmd.Exec()
+	_, err = cmd.Exec()
 
 	activeInstancesCountMu.Lock()
 	activeInstancesCount -= 1

pkg/modules/pdftk/pdftk_test.go

@@ -65,11 +65,11 @@ func TestPDFtk_Validate(t *testing.T) {
 func TestPDFtk_Metrics(t *testing.T) {
 	metrics, err := new(PDFtk).Metrics()
 	if err != nil {
-		t.Errorf("expected no error but got: %v", err)
+		t.Fatalf("expected no error but got: %v", err)
 	}
 
 	if len(metrics) != 1 {
-		t.Errorf("expected %d metrics, but got %d", 1, len(metrics))
+		t.Fatalf("expected %d metrics, but got %d", 1, len(metrics))
 	}
 
 	actual := metrics[0].Read()

pkg/modules/prometheus/prometheus.go

@@ -150,7 +150,7 @@ func (mod Prometheus) Start() error {
 // StartupMessage returns a custom startup message.
 func (mod Prometheus) StartupMessage() string {
 	if mod.disableCollect {
-		return "application not started (collect disabled by user)"
+		return "collect disabled"
 	}
 
 	return "collecting metrics"

pkg/modules/prometheus/prometheus_test.go

@@ -296,8 +296,8 @@ func TestPrometheus_StartupMessage(t *testing.T) {
 		expectMessage  string
 	}{
 		{
-			expectMessage:  "application not started (collect disabled by user)",
 			disableCollect: true,
+			expectMessage:  "collect disabled",
 		},
 		{
 			expectMessage: "collecting metrics",

pkg/modules/qpdf/doc.go

@@ -0,0 +1,3 @@
+// Package qpdf provides a module which abstracts the CLI tool QPDF and
+// implements the gotenberg.PDFEngine interface.
+package qpdf

pkg/modules/qpdf/qpdf.go

@@ -0,0 +1,117 @@
+package qpdf
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"sync"
+
+	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"go.uber.org/zap"
+)
+
+func init() {
+	gotenberg.MustRegisterModule(QPDF{})
+}
+
+// QPDF abstracts the CLI tool QPDF and implements the gotenberg.PDFEngine
+// interface.
+type QPDF struct {
+	binPath string
+}
+
+// Descriptor returns a QPDF's module descriptor.
+func (QPDF) Descriptor() gotenberg.ModuleDescriptor {
+	return gotenberg.ModuleDescriptor{
+		ID:  "qpdf",
+		New: func() gotenberg.Module { return new(QPDF) },
+	}
+}
+
+// Provision sets the modules properties. It returns an error if the
+// environment variable QPDF_BIN_PATH is not set.
+func (engine *QPDF) Provision(_ *gotenberg.Context) error {
+	binPath, ok := os.LookupEnv("QPDF_BIN_PATH")
+	if !ok {
+		return errors.New("QPDF_BIN_PATH environment variable is not set")
+	}
+
+	engine.binPath = binPath
+
+	return nil
+}
+
+// Validate validates the module properties.
+func (engine QPDF) Validate() error {
+	_, err := os.Stat(engine.binPath)
+	if os.IsNotExist(err) {
+		return fmt.Errorf("QPDF binary path does not exist: %w", err)
+	}
+
+	return nil
+}
+
+// Metrics returns the metrics.
+func (engine QPDF) Metrics() ([]gotenberg.Metric, error) {
+	return []gotenberg.Metric{
+		{
+			Name:        "qpdf_active_instances_count",
+			Description: "Current number of active QPDF instances.",
+			Read: func() float64 {
+				activeInstancesCountMu.RLock()
+				defer activeInstancesCountMu.RUnlock()
+
+				return activeInstancesCount
+			},
+		},
+	}, nil
+}
+
+// Merge merges the given PDFs into a unique PDF.
+func (engine QPDF) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+	var args []string
+	args = append(args, "--empty")
+	args = append(args, "--pages")
+	args = append(args, inputPaths...)
+	args = append(args, "--", outputPath)
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return fmt.Errorf("create command: %w", err)
+	}
+
+	activeInstancesCountMu.Lock()
+	activeInstancesCount += 1
+	activeInstancesCountMu.Unlock()
+
+	_, err = cmd.Exec()
+
+	activeInstancesCountMu.Lock()
+	activeInstancesCount -= 1
+	activeInstancesCountMu.Unlock()
+
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("merge PDFs with QPDF: %w", err)
+}
+
+// Convert is not available for this PDF engine.
+func (engine QPDF) Convert(_ context.Context, _ *zap.Logger, format, _, _ string) error {
+	return fmt.Errorf("convert PDF to '%s' with QPDF: %w", format, gotenberg.ErrPDFEngineMethodNotAvailable)
+}
+
+var (
+	activeInstancesCount   float64
+	activeInstancesCountMu sync.RWMutex
+)
+
+var (
+	_ gotenberg.Module          = (*QPDF)(nil)
+	_ gotenberg.Provisioner     = (*QPDF)(nil)
+	_ gotenberg.Validator       = (*QPDF)(nil)
+	_ gotenberg.MetricsProvider = (*QPDF)(nil)
+	_ gotenberg.PDFEngine       = (*QPDF)(nil)
+)

pkg/modules/qpdf/qpdf_test.go

@@ -0,0 +1,152 @@
+package qpdf
+
+import (
+	"context"
+	"errors"
+	"os"
+	"reflect"
+	"testing"
+
+	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"go.uber.org/zap"
+)
+
+func TestQPDF_Descriptor(t *testing.T) {
+	descriptor := QPDF{}.Descriptor()
+
+	actual := reflect.TypeOf(descriptor.New())
+	expect := reflect.TypeOf(new(QPDF))
+
+	if actual != expect {
+		t.Errorf("expected '%s' but got '%s'", expect, actual)
+	}
+}
+
+func TestQPDF_Provision(t *testing.T) {
+	mod := new(QPDF)
+	ctx := gotenberg.NewContext(gotenberg.ParsedFlags{}, nil)
+
+	err := mod.Provision(ctx)
+	if err != nil {
+		t.Errorf("expected no error but got: %v", err)
+	}
+}
+
+func TestQPDF_Validate(t *testing.T) {
+	for i, tc := range []struct {
+		binPath   string
+		expectErr bool
+	}{
+		{
+			expectErr: true,
+		},
+		{
+			binPath:   "/foo",
+			expectErr: true,
+		},
+		{
+			binPath: os.Getenv("QPDF_BIN_PATH"),
+		},
+	} {
+		mod := new(QPDF)
+		mod.binPath = tc.binPath
+		err := mod.Validate()
+
+		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 TestQPDF_Metrics(t *testing.T) {
+	metrics, err := new(QPDF).Metrics()
+	if err != nil {
+		t.Errorf("expected no error but got: %v", err)
+	}
+
+	if len(metrics) != 1 {
+		t.Errorf("expected %d metrics, but got %d", 1, len(metrics))
+	}
+
+	actual := metrics[0].Read()
+	if actual != 0 {
+		t.Errorf("expected %d QPDF instances, but got %f", 0, actual)
+	}
+}
+
+func TestQPDF_Merge(t *testing.T) {
+	for i, tc := range []struct {
+		ctx        context.Context
+		inputPaths []string
+		expectErr  bool
+	}{
+		{
+			ctx: context.TODO(),
+			inputPaths: []string{
+				"/tests/test/testdata/pdfengines/sample1.pdf",
+			},
+		},
+		{
+			ctx: context.TODO(),
+			inputPaths: []string{
+				"/tests/test/testdata/pdfengines/sample1.pdf",
+				"/tests/test/testdata/pdfengines/sample2.pdf",
+			},
+		},
+		{
+			ctx:       nil,
+			expectErr: true,
+		},
+		{
+			ctx: context.TODO(),
+			inputPaths: []string{
+				"foo",
+			},
+			expectErr: true,
+		},
+	} {
+		func() {
+			mod := new(QPDF)
+
+			err := mod.Provision(nil)
+			if err != nil {
+				t.Fatalf("test %d: expected error but got: %v", i, err)
+			}
+
+			outputDir, err := gotenberg.MkdirAll()
+			if err != nil {
+				t.Fatalf("test %d: expected error but got: %v", i, err)
+			}
+
+			defer func() {
+				err := os.RemoveAll(outputDir)
+				if err != nil {
+					t.Fatalf("test %d: expected no error but got: %v", i, err)
+				}
+			}()
+
+			err = mod.Merge(tc.ctx, zap.NewNop(), tc.inputPaths, outputDir+"/foo.pdf")
+
+			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 TestQPDF_Convert(t *testing.T) {
+	mod := new(QPDF)
+	err := mod.Convert(context.TODO(), zap.NewNop(), "", "", "")
+
+	if !errors.Is(err, gotenberg.ErrPDFEngineMethodNotAvailable) {
+		t.Errorf("expected error %v, but got: %v", gotenberg.ErrPDFEngineMethodNotAvailable, err)
+	}
+}

pkg/modules/webhook/middleware.go

@@ -143,7 +143,7 @@ func webhookMiddleware(w Webhook) api.Middleware {
 
 						client: &retryablehttp.Client{
 							HTTPClient: &http.Client{
-								Timeout: c.Get("writeTimeout").(time.Duration),
+								Timeout: w.clientTimeout,
 							},
 							RetryMax:     w.maxRetry,
 							RetryWaitMin: w.retryMinWait,

pkg/modules/webhook/middleware_test.go

@@ -6,7 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"math/rand"
 	"mime/multipart"
 	"net/http"
@@ -252,7 +252,7 @@ func TestWebhookMiddlewareGuards(t *testing.T) {
 
 		c := srv.NewContext(tc.request, httptest.NewRecorder())
 
-		ctx := &api.MockContext{Context: &api.Context{}}
+		ctx := &api.ContextMock{Context: &api.Context{}}
 		ctx.SetEchoContext(c)
 
 		c.Set("context", ctx.Context)
@@ -324,6 +324,7 @@ func TestWebhookMiddlewareAsynchronousProcess(t *testing.T) {
 			maxRetry:       0,
 			retryMinWait:   0,
 			retryMaxWait:   0,
+			clientTimeout:  time.Duration(30) * time.Second,
 			disable:        false,
 		}
 	}
@@ -397,9 +398,8 @@ func TestWebhookMiddlewareAsynchronousProcess(t *testing.T) {
 			c.Set("traceHeader", "Gotenberg-Trace")
 			c.Set("trace", "foo")
 			c.Set("startTime", time.Now())
-			c.Set("writeTimeout", time.Duration(10)*time.Second)
 
-			ctx := &api.MockContext{Context: &api.Context{}}
+			ctx := &api.ContextMock{Context: &api.Context{}}
 			ctx.SetLogger(zap.NewNop())
 			ctx.SetEchoContext(c)
 
@@ -450,7 +450,7 @@ func TestWebhookMiddlewareAsynchronousProcess(t *testing.T) {
 						}
 
 						if contentType == echo.MIMEApplicationJSONCharsetUTF8 {
-							body, err := ioutil.ReadAll(c.Request().Body)
+							body, err := io.ReadAll(c.Request().Body)
 							if err != nil {
 								errChan <- err
 								return nil
@@ -489,7 +489,7 @@ func TestWebhookMiddlewareAsynchronousProcess(t *testing.T) {
 							t.Errorf("test %d: expected '%s' '%s' to contain '%s'", i, echo.HeaderContentDisposition, contentDisposition, tc.expectWebhookFilename)
 						}
 
-						body, err := ioutil.ReadAll(c.Request().Body)
+						body, err := io.ReadAll(c.Request().Body)
 						if err != nil {
 							errChan <- err
 							return nil

pkg/modules/webhook/webhook.go

@@ -25,6 +25,7 @@ type Webhook struct {
 	maxRetry       int
 	retryMinWait   time.Duration
 	retryMaxWait   time.Duration
+	clientTimeout  time.Duration
 	disable        bool
 }
 
@@ -55,7 +56,7 @@ func (Webhook) Descriptor() gotenberg.ModuleDescriptor {
 			err = multierr.Append(err, fs.MarkDeprecated("api-disable-webhook", "use webhook-disable instead"))
 
 			if err != nil {
-				panic(fmt.Errorf("create deprecated flags for webhook module: %v", err))
+				panic(fmt.Errorf("create deprecated flags for the webhook module: %v", err))
 			}
 
 			// New flags.
@@ -66,6 +67,7 @@ func (Webhook) Descriptor() gotenberg.ModuleDescriptor {
 			fs.Int("webhook-max-retry", 4, "Set the maximum number of retries for the webhook feature")
 			fs.Duration("webhook-retry-min-wait", time.Duration(1)*time.Second, "Set the minimum duration to wait before trying to call the webhook again")
 			fs.Duration("webhook-retry-max-wait", time.Duration(30)*time.Second, "Set the maximum duration to wait before trying to call the webhook again")
+			fs.Duration("webhook-client-timeout", time.Duration(30)*time.Second, "Set the time limit for requests to the webhook")
 			fs.Bool("webhook-disable", false, "Disable the webhook feature")
 
 			return fs
@@ -84,6 +86,7 @@ func (w *Webhook) Provision(ctx *gotenberg.Context) error {
 	w.maxRetry = flags.MustDeprecatedInt("api-webhook-max-retry", "webhook-max-retry")
 	w.retryMinWait = flags.MustDeprecatedDuration("api-webhook-retry-min-wait", "webhook-retry-min-wait")
 	w.retryMaxWait = flags.MustDeprecatedDuration("api-webhook-retry-min-wait", "webhook-retry-max-wait")
+	w.clientTimeout = flags.MustDuration("webhook-client-timeout")
 	w.disable = flags.MustDeprecatedBool("api-disable-webhook", "webhook-disable")
 
 	return nil

pkg/standard/imports.go

@@ -7,11 +7,12 @@ import (
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/gc"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/pdfengine"
-	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
+	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/logging"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/pdfcpu"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/pdfengines"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/pdftk"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/prometheus"
+	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/qpdf"
 	_ "github.com/gotenberg/gotenberg/v7/pkg/modules/webhook"
 )

scripts/release.sh

@@ -6,8 +6,9 @@ GOLANG_VERSION="$1"
 GOTENBERG_VERSION="$2"
 GOTENBERG_USER_GID="$3"
 GOTENBERG_USER_UID="$4"
-PDFTK_VERSION="$5"
+NOTO_COLOR_EMOJI_VERSION="$5"
-DOCKER_REPOSITORY="$6"
+PDFTK_VERSION="$6"
+DOCKER_REPOSITORY="$7"
 
 GOTENBERG_VERSION="${GOTENBERG_VERSION//v}"
 SEMVER=( ${GOTENBERG_VERSION//./ } )
@@ -23,6 +24,7 @@ docker buildx build \
   --build-arg GOTENBERG_VERSION="$GOTENBERG_VERSION" \
   --build-arg GOTENBERG_USER_GID="$GOTENBERG_USER_GID" \
   --build-arg GOTENBERG_USER_UID="$GOTENBERG_USER_UID" \
+  --build-arg NOTO_COLOR_EMOJI_VERSION="$NOTO_COLOR_EMOJI_VERSION" \
   --build-arg PDFTK_VERSION="$PDFTK_VERSION" \
   --platform linux/amd64 \
   --platform linux/arm64 \
@@ -36,13 +38,11 @@ docker buildx build \
   -f build/Dockerfile .
 
 # Cloud Run variant.
+# Only linux/amd64! See https://github.com/gotenberg/gotenberg/issues/505#issuecomment-1264679278.
 docker buildx build \
   --build-arg DOCKER_REPOSITORY="$DOCKER_REPOSITORY" \
   --build-arg GOTENBERG_VERSION="$GOTENBERG_VERSION" \
   --platform linux/amd64 \
-  --platform linux/arm64 \
-  --platform linux/arm/v7 \
-  --platform linux/386 \
   -t "$DOCKER_REPOSITORY/gotenberg:latest-cloudrun" \
   -t "$DOCKER_REPOSITORY/gotenberg:${SEMVER[0]}-cloudrun" \
   -t "$DOCKER_REPOSITORY/gotenberg:${SEMVER[0]}.${SEMVER[1]}-cloudrun" \

test/Dockerfile

@@ -3,7 +3,7 @@ ARG DOCKER_REPOSITORY
 ARG GOTENBERG_VERSION
 ARG GOLANGCI_LINT_VERSION
 
-FROM golang:$GOLANG_VERSION-stretch as golang
+FROM golang:$GOLANG_VERSION-bullseye as golang
 
 # We're extending the Gotenberg's Docker image because our code relies on external
 # dependencies like Google Chrome, LibreOffice, etc.
@@ -42,4 +42,4 @@ RUN apt-get update -qq &&\
 # Pristine working directory.
 WORKDIR /tests
 
-ENTRYPOINT [ "docker-entrypoint.sh" ]
+ENTRYPOINT [ "/usr/bin/tini", "--", "docker-entrypoint.sh" ]

test/gotest.sh

@@ -2,5 +2,6 @@
 
 set -x
 
-go test -race -covermode=atomic -coverprofile=/tests/coverage.txt ./...
+# TODO: remove -buildvcs=false when fix for https://github.com/golang/go/issues/51723 is live.
+go test -buildvcs=false -race -covermode=atomic -coverprofile=/tests/coverage.txt ./...
 go tool cover -html=coverage.txt -o /tests/coverage.html

test/testdata/chromium/html/sample11/index.html

@@ -1,12 +0,0 @@
-<!doctype html>
-<html lang="en">
-<head>
-    <meta charset=v"utf-8">
-    <title>Gutenberg</title>
-</head>
-<body>
-
-<p id="extra">Extra link tags <span id="not">not</span> working</p>
-
-</body>
-</html>

test/testdata/chromium/html/sample11/script.js

@@ -1,2 +0,0 @@
-let extra = document.getElementById('extra')
-extra.innerText = extra.innerText + ' and extra JavaScript tags too!'

test/testdata/chromium/html/sample11/style.css

@@ -1,14 +0,0 @@
-@font-face {
-    font-family: 'Local';
-    src: url('font.woff') format('woff');
-    font-weight: normal;
-    font-style: normal;
-}
-
-#extra {
-    font-family: 'Local'
-}
-
-#not {
-    display: none;
-}