chore(deps): update Go dependencies

.github/workflows/continuous_integration.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Run linters
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.60.3
+          version: v1.61.0
 
   tests:
     needs:

Makefile

@@ -11,9 +11,10 @@ DOCKER_REPOSITORY=gotenberg
 GOTENBERG_VERSION=snapshot
 GOTENBERG_USER_GID=1001
 GOTENBERG_USER_UID=1001
-NOTO_COLOR_EMOJI_VERSION=v2.042 # See https://github.com/googlefonts/noto-emoji/releases.
+NOTO_COLOR_EMOJI_VERSION=v2.047 # See https://github.com/googlefonts/noto-emoji/releases.
 PDFTK_VERSION=v3.3.3 # See https://gitlab.com/pdftk-java/pdftk/-/releases - Binary package.
-GOLANGCI_LINT_VERSION=v1.60.3 # See https://github.com/golangci/golangci-lint/releases.
+PDFCPU_VERSION=v0.8.1 # See https://github.com/pdfcpu/pdfcpu/releases.
+GOLANGCI_LINT_VERSION=v1.61.0 # See https://github.com/golangci/golangci-lint/releases.
 
 .PHONY: build
 build: ## Build the Gotenberg's Docker image
@@ -24,14 +25,17 @@ build: ## Build the Gotenberg's Docker image
 	--build-arg GOTENBERG_USER_UID=$(GOTENBERG_USER_UID) \
 	--build-arg NOTO_COLOR_EMOJI_VERSION=$(NOTO_COLOR_EMOJI_VERSION) \
 	--build-arg PDFTK_VERSION=$(PDFTK_VERSION) \
+	--build-arg PDFCPU_VERSION=$(PDFCPU_VERSION) \
 	-t $(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION) \
 	-f build/Dockerfile .
 
 GOTENBERG_GRACEFUL_SHUTDOWN_DURATION=30s
 API_PORT=3000
 API_PORT_FROM_ENV=
+API_BIND_IP=
 API_START_TIMEOUT=30s
 API_TIMEOUT=30s
+API_BODY_LIMIT=
 API_ROOT_PATH=/
 API_TRACE_HEADER=Gotenberg-Trace
 API_ENABLE_BASIC_AUTH=false
@@ -68,6 +72,10 @@ LOG_LEVEL=info
 LOG_FORMAT=auto
 LOG_FIELDS_PREFIX=
 PDFENGINES_ENGINES=
+PDFENGINES_MERGE_ENGINES=qpdf,pdfcpu,pdftk
+PDFENGINES_CONVERT_ENGINES=libreoffice-pdfengine
+PDFENGINES_READ_METADATA_ENGINES=exiftool
+PDFENGINES_WRITE_METADATA_ENGINES=exiftool
 PDFENGINES_DISABLE_ROUTES=false
 PROMETHEUS_NAMESPACE=gotenberg
 PROMETHEUS_COLLECT_INTERVAL=1s
@@ -94,15 +102,17 @@ run: ## Start a Gotenberg container
 	--gotenberg-graceful-shutdown-duration=$(GOTENBERG_GRACEFUL_SHUTDOWN_DURATION) \
 	--api-port=$(API_PORT) \
 	--api-port-from-env=$(API_PORT_FROM_ENV) \
+	--api-bind-ip=$(API_BIND_IP) \
 	--api-start-timeout=$(API_START_TIMEOUT) \
 	--api-timeout=$(API_TIMEOUT) \
+	--api-body-limit="$(API_BODY_LIMIT)" \
 	--api-root-path=$(API_ROOT_PATH) \
 	--api-trace-header=$(API_TRACE_HEADER) \
 	--api-enable-basic-auth=$(API_ENABLE_BASIC_AUTH) \
 	--api-download-from-allow-list=$(API-DOWNLOAD-FROM-ALLOW-LIST) \
-    --api-download-from-deny-list=$(API-DOWNLOAD-FROM-DENY-LIST) \
+	--api-download-from-deny-list=$(API-DOWNLOAD-FROM-DENY-LIST) \
-    --api-download-from-max-retry=$(API-DOWNLOAD-FROM-FROM-MAX-RETRY) \
+	--api-download-from-max-retry=$(API-DOWNLOAD-FROM-FROM-MAX-RETRY) \
-    --api-disable-download-from=$(API-DISABLE-DOWNLOAD-FROM) \
+	--api-disable-download-from=$(API-DISABLE-DOWNLOAD-FROM) \
 	--api-disable-health-check-logging=$(API_DISABLE_HEALTH_CHECK_LOGGING) \
 	--chromium-restart-after=$(CHROMIUM_RESTART_AFTER) \
 	--chromium-auto-start=$(CHROMIUM_AUTO_START) \
@@ -130,6 +140,10 @@ run: ## Start a Gotenberg container
 	--log-format=$(LOG_FORMAT) \
 	--log-fields-prefix=$(LOG_FIELDS_PREFIX) \
 	--pdfengines-engines=$(PDFENGINES_ENGINES) \
+	--pdfengines-merge-engines=$(PDFENGINES_MERGE_ENGINES) \
+	--pdfengines-convert-engines=$(PDFENGINES_CONVERT_ENGINES) \
+	--pdfengines-read-metadata-engines=$(PDFENGINES_READ_METADATA_ENGINES) \
+	--pdfengines-write-metadata-engines=$(PDFENGINES_WRITE_METADATA_ENGINES) \
 	--pdfengines-disable-routes=$(PDFENGINES_DISABLE_ROUTES) \
 	--prometheus-namespace=$(PROMETHEUS_NAMESPACE) \
 	--prometheus-collect-interval=$(PROMETHEUS_COLLECT_INTERVAL) \
@@ -195,6 +209,7 @@ release: ## Build the Gotenberg's Docker image and push it to a Docker repositor
 	$(GOTENBERG_USER_UID) \
 	$(NOTO_COLOR_EMOJI_VERSION) \
 	$(PDFTK_VERSION) \
+	$(PDFCPU_VERSION) \
 	$(DOCKER_REGISTRY) \
 	$(DOCKER_REPOSITORY) \
 	$(LINUX_AMD64_RELEASE)

build/Dockerfile

@@ -3,10 +3,35 @@
 # stage that uses them.
 ARG GOLANG_VERSION
 
+# ----------------------------------------------
+# pdfcpu binary build stage
+# ----------------------------------------------
+# Note: this stage is required as pdfcpu does not release an armhf variant by
+# default.
+
+FROM golang:$GOLANG_VERSION AS pdfcpu-binary-stage
+
+ARG PDFCPU_VERSION
+ENV CGO_ENABLED=0
+
+# Define the working directory outside of $GOPATH (we're using go modules).
+WORKDIR /home
+
+RUN curl -Ls "https://github.com/pdfcpu/pdfcpu/archive/refs/tags/$PDFCPU_VERSION.tar.gz" -o pdfcpu.tar.gz &&\
+    tar --strip-components=1 -xvzf pdfcpu.tar.gz
+
+# Install module dependencies.
+RUN go mod download &&\
+    go mod verify
+
+RUN go build -o pdfcpu -ldflags "-s -w -X 'main.version=$PDFCPU_VERSION' -X 'github.com/pdfcpu/pdfcpu/pkg/pdfcpu.VersionStr=$PDFCPU_VERSION' -X main.builtBy=gotenberg" ./cmd/pdfcpu &&\
+    # Verify installation.
+    ./pdfcpu version
+
 # ----------------------------------------------
 # Gotenberg binary build stage
 # ----------------------------------------------
-FROM golang:$GOLANG_VERSION AS binary-stage
+FROM golang:$GOLANG_VERSION AS gotenberg-binary-stage
 
 ARG GOTENBERG_VERSION
 ENV CGO_ENABLED=0
@@ -187,8 +212,11 @@ RUN \
 # https://github.com/arachnys/athenapdf/commit/ba25a8d80a25d08d58865519c4cd8756dc9a336d.
 COPY build/fonts.conf /etc/fonts/conf.d/100-gotenberg.conf
 
-# Copy the Gotenberg binary from the binary stage.
+# Copy the pdfcpu binary from the pdfcpu-binary-stage.
-COPY --from=binary-stage /home/gotenberg /usr/bin/
+COPY --from=pdfcpu-binary-stage /home/pdfcpu /usr/bin/
+
+# Copy the Gotenberg binary from the gotenberg-binary-stage.
+COPY --from=gotenberg-binary-stage /home/gotenberg /usr/bin/
 
 # Environment variables required by modules or else.
 ENV CHROMIUM_BIN_PATH=/usr/bin/chromium
@@ -197,6 +225,7 @@ ENV UNOCONVERTER_BIN_PATH=/usr/bin/unoconverter
 ENV PDFTK_BIN_PATH=/usr/bin/pdftk
 ENV QPDF_BIN_PATH=/usr/bin/qpdf
 ENV EXIFTOOL_BIN_PATH=/usr/bin/exiftool
+ENV PDFCPU_BIN_PATH=/usr/bin/pdfcpu
 
 USER gotenberg
 WORKDIR /home/gotenberg

go.mod

@@ -4,15 +4,15 @@ go 1.23.0
 
 require (
 	github.com/alexliesenfeld/health v0.8.0
-	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/andybalholm/brotli v1.1.1 // indirect
 	github.com/barasher/go-exiftool v1.10.0
-	github.com/chromedp/cdproto v0.0.0-20240919203636-12af5e8a671f
+	github.com/chromedp/cdproto v0.0.0-20241110205750-a72e6703cd9b
-	github.com/chromedp/chromedp v0.10.0
+	github.com/chromedp/chromedp v0.11.2
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-retryablehttp v0.7.7
-	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
 	github.com/labstack/echo/v4 v4.12.0
 	github.com/labstack/gommon v0.4.2
@@ -20,21 +20,19 @@ require (
 	github.com/mholt/archiver/v3 v3.5.1
 	github.com/microcosm-cc/bluemonday v1.0.27
 	github.com/nwaples/rardecode v1.1.3 // indirect
-	github.com/pdfcpu/pdfcpu v0.8.1
 	github.com/pierrec/lz4/v4 v4.1.21 // indirect
-	github.com/prometheus/client_golang v1.20.4
+	github.com/prometheus/client_golang v1.20.5
 	github.com/russross/blackfriday/v2 v2.1.0
 	github.com/spf13/pflag v1.0.5
 	github.com/ulikunitz/xz v0.5.12 // indirect
 	go.uber.org/multierr v1.11.0
 	go.uber.org/zap v1.27.0
-	golang.org/x/crypto v0.27.0 // indirect
+	golang.org/x/crypto v0.29.0 // indirect
-	golang.org/x/image v0.20.0 // indirect
+	golang.org/x/net v0.31.0
-	golang.org/x/net v0.29.0
+	golang.org/x/sync v0.9.0
-	golang.org/x/sync v0.8.0
+	golang.org/x/sys v0.27.0 // indirect
-	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/term v0.26.0
-	golang.org/x/term v0.24.0
+	golang.org/x/text v0.20.0
-	golang.org/x/text v0.18.0
 )
 
 require github.com/dlclark/regexp2 v1.11.4
@@ -43,29 +41,23 @@ require (
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/chromedp/sysutil v1.0.0 // indirect
+	github.com/chromedp/sysutil v1.1.0 // indirect
 	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.4.0 // indirect
 	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/gorilla/css v1.0.1 // indirect
-	github.com/hhrutter/lzw v1.0.0 // indirect
-	github.com/hhrutter/tiff v1.0.1 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.59.1 // indirect
+	github.com/prometheus/common v0.60.1 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasttemplate v1.2.2 // indirect
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
-	golang.org/x/time v0.6.0 // indirect
+	golang.org/x/time v0.8.0 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
+	google.golang.org/protobuf v1.35.2 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -1,8 +1,8 @@
 github.com/alexliesenfeld/health v0.8.0 h1:lCV0i+ZJPTbqP7LfKG7p3qZBl5VhelwUFCIVWl77fgk=
 github.com/alexliesenfeld/health v0.8.0/go.mod h1:TfNP0f+9WQVWMQRzvMUjlws4ceXKEL3WR+6Hp95HUFc=
 github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
-github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
+github.com/andybalholm/brotli v1.1.1 h1:PR2pgnyFznKEugtsUo0xLdDop5SKXd5Qf5ysW+7XdTA=
-github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
+github.com/andybalholm/brotli v1.1.1/go.mod h1:05ib4cKhjx3OQYUY22hTVd34Bc8upXjOLL2rKwwZBoA=
 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/barasher/go-exiftool v1.10.0 h1:f5JY5jc42M7tzR6tbL9508S2IXdIcG9QyieEXNMpIhs=
@@ -11,13 +11,12 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/chromedp/cdproto v0.0.0-20240801214329-3f85d328b335/go.mod h1:GKljq0VrfU4D5yc+2qA6OVr8pmO/MBbPEWqWQ/oqGEs=
+github.com/chromedp/cdproto v0.0.0-20241110205750-a72e6703cd9b h1:md1Gk5jkNE91SZxFDCMHmKqX0/GsEr1/VTejht0sCbY=
-github.com/chromedp/cdproto v0.0.0-20240919203636-12af5e8a671f h1:dEjjp+iN34En5Pl9XIi978DmR2/CMwuOxoPWtiHixKQ=
+github.com/chromedp/cdproto v0.0.0-20241110205750-a72e6703cd9b/go.mod h1:4XqMl3iIW08jtieURWL6Tt5924w21pxirC6th662XUM=
-github.com/chromedp/cdproto v0.0.0-20240919203636-12af5e8a671f/go.mod h1:GKljq0VrfU4D5yc+2qA6OVr8pmO/MBbPEWqWQ/oqGEs=
+github.com/chromedp/chromedp v0.11.2 h1:ZRHTh7DjbNTlfIv3NFTbB7eVeu5XCNkgrpcGSpn2oX0=
-github.com/chromedp/chromedp v0.10.0 h1:bRclRYVpMm/UVD76+1HcRW9eV3l58rFfy7AdBvKab1E=
+github.com/chromedp/chromedp v0.11.2/go.mod h1:lr8dFRLKsdTTWb75C/Ttol2vnBKOSnt0BW8R9Xaupi8=
-github.com/chromedp/chromedp v0.10.0/go.mod h1:ei/1ncZIqXX1YnAYDkxhD4gzBgavMEUu7JCKvztdomE=
+github.com/chromedp/sysutil v1.1.0 h1:PUFNv5EcprjqXZD9nJb9b/c9ibAbxiYo4exNWZyipwM=
-github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
+github.com/chromedp/sysutil v1.1.0/go.mod h1:WiThHUdltqCNKGc4gaU50XgYjwjYIhKWoHGPTUfWTJ8=
-github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -52,24 +51,16 @@ github.com/hashicorp/go-hclog v1.6.3 h1:Qr2kF+eVWjTiYmU7Y31tYlP1h0q/X3Nl3tPGdaB1
 github.com/hashicorp/go-hclog v1.6.3/go.mod h1:W4Qnvbt70Wk/zYJryRzDRU/4r0kIg0PVHBcfoyhpF5M=
 github.com/hashicorp/go-retryablehttp v0.7.7 h1:C8hUCYzor8PIfXHa4UrZkU4VvK8o9ISHxT2Q8+VepXU=
 github.com/hashicorp/go-retryablehttp v0.7.7/go.mod h1:pkQpWZeYWskR+D1tR2O5OcBFOxfA7DoAO6xtkuQnHTk=
-github.com/hhrutter/lzw v1.0.0 h1:laL89Llp86W3rRs83LvKbwYRx6INE8gDn0XNb1oXtm0=
-github.com/hhrutter/lzw v1.0.0/go.mod h1:2HC6DJSn/n6iAZfgM3Pg+cP1KxeWc3ezG8bBqW5+WEo=
-github.com/hhrutter/tiff v1.0.1 h1:MIus8caHU5U6823gx7C6jrfoEvfSTGtEFRiM8/LOzC0=
-github.com/hhrutter/tiff v1.0.1/go.mod h1:zU/dNgDm0cMIa8y8YwcYBeuEEveI4B0owqHyiPpJPHc=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.11.4/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
-github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
-github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
 github.com/klauspost/cpuid v1.2.0/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
 github.com/klauspost/pgzip v1.2.5/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
 github.com/klauspost/pgzip v1.2.6 h1:8RXeL5crjEUFnR2/Sn6GJNWtSQ3Dk8pq4CL3jvdDyjU=
 github.com/klauspost/pgzip v1.2.6/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
-github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
-github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
-github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
-github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/labstack/echo/v4 v4.12.0 h1:IKpw49IMryVB2p1a4dzwlhP1O2Tf2E0Ir/450lH+kI0=
@@ -85,8 +76,6 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mholt/archiver/v3 v3.5.1 h1:rDjOBX9JSF5BvoJGvjqK479aL70qh9DIpZCl+k7Clwo=
 github.com/mholt/archiver/v3 v3.5.1/go.mod h1:e3dqJ7H78uzsRSEACH1joayhuSyhnonssnDhppzS1L4=
 github.com/microcosm-cc/bluemonday v1.0.27 h1:MpEUotklkwCSLeH+Qdx1VJgNqLlpY2KXwXFM08ygZfk=
@@ -98,28 +87,19 @@ github.com/nwaples/rardecode v1.1.3 h1:cWCaZwfM5H7nAD6PyEdcVnczzV8i/JtotnyW/dD9l
 github.com/nwaples/rardecode v1.1.3/go.mod h1:5DzqNKiOdpKKBH87u8VlvAnPZMXcGRhxWkRpHbbfGS0=
 github.com/orisano/pixelmatch v0.0.0-20220722002657-fb0b55479cde h1:x0TT0RDC7UhAVbbWWBzr41ElhJx5tXPWkIHA2HWPRuw=
 github.com/orisano/pixelmatch v0.0.0-20220722002657-fb0b55479cde/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
-github.com/pdfcpu/pdfcpu v0.8.1 h1:AiWUb8uXlrXqJ73OmiYXBjDF0Qxt4OuM281eAfkAOMA=
-github.com/pdfcpu/pdfcpu v0.8.1/go.mod h1:M5SFotxdaw0fedxthpjbA/PADytAo6wJnGH0SSBWJ7s=
 github.com/pierrec/lz4/v4 v4.1.2/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/pierrec/lz4/v4 v4.1.21 h1:yOVMLb6qSIDP67pl/5F7RepeKYu/VmTyEXvuMI5d9mQ=
 github.com/pierrec/lz4/v4 v4.1.21/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.20.4 h1:Tgh3Yr67PaOv/uTqloMsCEdeuFTatm5zIq5+qNN23vI=
+github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
-github.com/prometheus/client_golang v1.20.4/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
+github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
 github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
-github.com/prometheus/common v0.59.1 h1:LXb1quJHWm1P6wq/U824uxYi4Sg0oGvNeUm1z5dJoX0=
+github.com/prometheus/common v0.60.1 h1:FUas6GcOw66yB/73KC+BOZoFJmbo/1pojoILArPAaSc=
-github.com/prometheus/common v0.59.1/go.mod h1:GpWM7dewqmVYcd7SmRaiWVe9SSqjf0UrwnYnpEZNuT0=
+github.com/prometheus/common v0.60.1/go.mod h1:h0LYf1R1deLSKtD4Vdg8gy4RuOvENW2J/h19V5NADQw=
 github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
-github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
-github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
-github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
-github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
-github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
@@ -140,38 +120,32 @@ github.com/valyala/fasttemplate v1.2.2 h1:lxLXG0uE3Qnshl9QyaK6XJxMXlQZELvChBOCmQ
 github.com/valyala/fasttemplate v1.2.2/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
 github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 h1:nIPpBwaJSVYIxUFsDv3M8ofmx9yWTog9BfvIu0q41lo=
 github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8/go.mod h1:HUYIGzjTL3rfEspMxjDjgmT5uz5wzYJKVo23qUhYTos=
+github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=
+github.com/xyproto/randomstring v1.0.5/go.mod h1:rgmS5DeNXLivK7YprL0pY+lTuhNQW3iGxZ18UQApw/E=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8=
 go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
-golang.org/x/crypto v0.27.0 h1:GXm2NjJrPaiv/h1tb2UH8QfgC/hOf/+z0p6PT8o1w7A=
+golang.org/x/crypto v0.29.0 h1:L5SG1JTTXupVV3n6sUqMTeWbjAyfPwoda2DLX8J8FrQ=
-golang.org/x/crypto v0.27.0/go.mod h1:1Xngt8kV6Dvbssa53Ziq6Eqn0HqbZi5Z6R0ZpwQzt70=
+golang.org/x/crypto v0.29.0/go.mod h1:+F4F4N5hv6v38hfeYwTdx20oUvLLc+QfrE9Ax9HtgRg=
-golang.org/x/image v0.20.0 h1:7cVCUjQwfL18gyBJOmYvptfSHS8Fb3YUDtfLIZ7Nbpw=
+golang.org/x/net v0.31.0 h1:68CPQngjLL0r2AlUKiSxtQFKvzRVbnzLwMUn5SzcLHo=
-golang.org/x/image v0.20.0/go.mod h1:0a88To4CYVBAHp5FXJm8o7QbUl37Vd85ply1vyD8auM=
+golang.org/x/net v0.31.0/go.mod h1:P4fl1q7dY2hnZFxEk4pPSkDHF+QqjitcnDjUQyMM+pM=
-golang.org/x/net v0.29.0 h1:5ORfpBpCs4HzDYoodCDBbwHzdR5UrLBZ3sOnUJmFoHo=
+golang.org/x/sync v0.9.0 h1:fEo0HyrW1GIgZdpbhCRO0PkJajUS5H9IFUztCgEo2jQ=
-golang.org/x/net v0.29.0/go.mod h1:gLkgy8jTGERgjzMic6DS9+SP0ajcu6Xu3Orq/SpETg0=
+golang.org/x/sync v0.9.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
-golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.27.0 h1:wBqf8DvsY9Y/2P8gAfPDEYNuS30J4lPHJxXSb/nJZ+s=
-golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/sys v0.27.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.26.0 h1:WEQa6V3Gja/BhNxg540hBip/kkaYtRg3cxg4oXSw4AU=
-golang.org/x/term v0.24.0 h1:Mh5cbb+Zk2hqqXNO7S1iTjEphVL+jb8ZWaqh/g+JWkM=
+golang.org/x/term v0.26.0/go.mod h1:Si5m1o57C5nBNQo5z1iq+XDijt21BDBDp2bK0QI8e3E=
-golang.org/x/term v0.24.0/go.mod h1:lOBK/LVxemqiMij05LGJ0tzNr8xlmwBRJ81PX6wVLH8=
+golang.org/x/text v0.20.0 h1:gK/Kv2otX8gz+wn7Rmb3vT96ZwuoxnQlY+HlJVj7Qug=
-golang.org/x/text v0.18.0 h1:XvMDiNzPAl0jr17s6W9lcaIhGUfUORdGCNsuLmPG224=
+golang.org/x/text v0.20.0/go.mod h1:D4IsuqiFMhST5bX19pQ9ikHC2GsaKyk/oF+pn3ducp4=
-golang.org/x/text v0.18.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+golang.org/x/time v0.8.0 h1:9i3RxcPv3PZnitoVGMPDKZSq1xW1gK1Xy3ArNOGZfEg=
-golang.org/x/time v0.6.0 h1:eTDhh4ZXt5Qf0augr54TN6suAUudPcawVZeIAPU7D4U=
+golang.org/x/time v0.8.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
-golang.org/x/time v0.6.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
-google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/gotenberg/flags.go

@@ -168,33 +168,37 @@ func (f *ParsedFlags) MustDeprecatedDuration(deprecated string, newName string)
 	return f.MustDuration(newName)
 }
 
-// MustHumanReadableBytesString returns the human-readable bytes string of a
+// MustHumanReadableBytes returns the human-readable bytes string of a flag
-// flag given by name.
+// given by name.
 // It panics if an error occurs.
-func (f *ParsedFlags) MustHumanReadableBytesString(name string) string {
+func (f *ParsedFlags) MustHumanReadableBytes(name string) int64 {
 	val, err := f.GetString(name)
 	if err != nil {
 		panic(err)
 	}
 
-	_, err = bytes.Parse(val)
+	if val == "" {
+		return 0
+	}
+
+	b, err := bytes.Parse(val)
 	if err != nil {
 		panic(err)
 	}
 
-	return val
+	return b
 }
 
-// MustDeprecatedHumanReadableBytesString returns the human-readable bytes
+// MustDeprecatedHumanReadableBytes returns the human-readable bytes of a
-// string of a deprecated flag if it was explicitly set or the human-readable
+// deprecated flag if it was explicitly set or the human-readable bytes string
-// bytes string of the new flag.
+// of the new flag.
 // It panics if an error occurs.
-func (f *ParsedFlags) MustDeprecatedHumanReadableBytesString(deprecated string, newName string) string {
+func (f *ParsedFlags) MustDeprecatedHumanReadableBytes(deprecated string, newName string) int64 {
 	if f.Changed(deprecated) {
-		return f.MustHumanReadableBytesString(deprecated)
+		return f.MustHumanReadableBytes(deprecated)
 	}
 
-	return f.MustHumanReadableBytesString(newName)
+	return f.MustHumanReadableBytes(newName)
 }
 
 // MustRegexp returns the regular expression of a flag given by name.

pkg/gotenberg/flags_test.go

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

pkg/modules/api/api.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"net"
 	"net/http"
 	"sort"
 	"strings"
@@ -29,9 +30,11 @@ func init() {
 // middlewares or health checks.
 type Api struct {
 	port                      int
+	bindIp                    string
 	tlsCertFile               string
 	tlsKeyFile                string
 	startTimeout              time.Duration
+	bodyLimit                 int64
 	timeout                   time.Duration
 	rootPath                  string
 	traceHeader               string
@@ -170,10 +173,12 @@ func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 			fs := flag.NewFlagSet("api", flag.ExitOnError)
 			fs.Int("api-port", 3000, "Set the port on which the API should listen")
 			fs.String("api-port-from-env", "", "Set the environment variable with the port on which the API should listen - override the default port")
+			fs.String("api-bind-ip", "", "Set the IP address the API should bind to for incoming connections")
 			fs.String("api-tls-cert-file", "", "Path to the TLS/SSL certificate file - for HTTPS support")
 			fs.String("api-tls-key-file", "", "Path to the TLS/SSL key file - for HTTPS support")
 			fs.Duration("api-start-timeout", time.Duration(30)*time.Second, "Set the time limit for the API to start")
 			fs.Duration("api-timeout", time.Duration(30)*time.Second, "Set the time limit for requests")
+			fs.String("api-body-limit", "", "Set the body limit for multipart/form-data requests - it accepts values like 5MB, 1GB, etc")
 			fs.String("api-root-path", "/", "Set the root path of the API - for service discovery via URL paths")
 			fs.String("api-trace-header", "Gotenberg-Trace", "Set the header name to use for identifying requests")
 			fs.Bool("api-enable-basic-auth", false, "Enable basic authentication - will look for the GOTENBERG_API_BASIC_AUTH_USERNAME and GOTENBERG_API_BASIC_AUTH_PASSWORD environment variables")
@@ -192,10 +197,12 @@ func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 func (a *Api) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
 	a.port = flags.MustInt("api-port")
+	a.bindIp = flags.MustString("api-bind-ip")
 	a.tlsCertFile = flags.MustString("api-tls-cert-file")
 	a.tlsKeyFile = flags.MustString("api-tls-key-file")
 	a.startTimeout = flags.MustDuration("api-start-timeout")
 	a.timeout = flags.MustDuration("api-timeout")
+	a.bodyLimit = flags.MustHumanReadableBytes("api-body-limit")
 	a.rootPath = flags.MustString("api-root-path")
 	a.traceHeader = flags.MustString("api-trace-header")
 	a.downloadFromCfg = downloadFromConfig{
@@ -326,6 +333,10 @@ func (a *Api) Validate() error {
 		)
 	}
 
+	if a.bindIp != "" && net.ParseIP(a.bindIp) == nil {
+		err = multierr.Append(err, errors.New("IP must be a valid IP address"))
+	}
+
 	if (a.tlsCertFile != "" && a.tlsKeyFile == "") || (a.tlsCertFile == "" && a.tlsKeyFile != "") {
 		err = multierr.Append(err,
 			errors.New("both TLS certificate and key files must be set"),
@@ -455,7 +466,7 @@ func (a *Api) Start() error {
 		}
 
 		if route.IsMultipart {
-			middlewares = append(middlewares, contextMiddleware(a.fs, a.timeout, a.downloadFromCfg))
+			middlewares = append(middlewares, contextMiddleware(a.fs, a.timeout, a.bodyLimit, a.downloadFromCfg))
 
 			for _, externalMultipartMiddleware := range externalMultipartMiddlewares {
 				middlewares = append(middlewares, externalMultipartMiddleware.Handler)
@@ -519,11 +530,11 @@ func (a *Api) Start() error {
 		var err error
 		if a.tlsCertFile != "" && a.tlsKeyFile != "" {
 			// Start an HTTPS server (supports HTTP/2).
-			err = a.srv.StartTLS(fmt.Sprintf(":%d", a.port), a.tlsCertFile, a.tlsKeyFile)
+			err = a.srv.StartTLS(fmt.Sprintf("%s:%d", a.bindIp, a.port), a.tlsCertFile, a.tlsKeyFile)
 		} else {
 			// Start an HTTP/2 Cleartext (non-HTTPS) server.
 			server := &http2.Server{}
-			err = a.srv.StartH2CServer(fmt.Sprintf(":%d", a.port), server)
+			err = a.srv.StartH2CServer(fmt.Sprintf("%s:%d", a.bindIp, a.port), server)
 		}
 		if !errors.Is(err, http.ErrServerClosed) {
 			a.logger.Fatal(err.Error())
@@ -535,7 +546,11 @@ func (a *Api) Start() error {
 
 // StartupMessage returns a custom startup message.
 func (a *Api) StartupMessage() string {
-	return fmt.Sprintf("server listening on port %d", a.port)
+	ip := a.bindIp
+	if a.bindIp == "" {
+		ip = "[::]"
+	}
+	return fmt.Sprintf("server started on %s:%d", ip, a.port)
 }
 
 // Stop stops the HTTP server.

pkg/modules/api/api_test.go

@@ -57,6 +57,30 @@ func TestApi_Provision(t *testing.T) {
 			}(),
 			expectError: true,
 		},
+		{
+			scenario: "port from env: invalid environment variable value",
+			ctx: func() *gotenberg.Context {
+				fs := new(Api).Descriptor().FlagSet
+				err := fs.Parse([]string{"--api-port-from-env=PORT"})
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return gotenberg.NewContext(
+					gotenberg.ParsedFlags{
+						FlagSet: fs,
+					},
+					nil,
+				)
+			}(),
+			setEnv: func() {
+				err := os.Setenv("PORT", "foo")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+			},
+			expectError: true,
+		},
 		{
 			scenario: "basic auth: non-existing GOTENBERG_API_BASIC_AUTH_USERNAME environment variable",
 			ctx: func() *gotenberg.Context {
@@ -99,30 +123,6 @@ func TestApi_Provision(t *testing.T) {
 			},
 			expectError: true,
 		},
-		{
-			scenario: "port from env: invalid environment variable value",
-			ctx: func() *gotenberg.Context {
-				fs := new(Api).Descriptor().FlagSet
-				err := fs.Parse([]string{"--api-port-from-env=PORT"})
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return gotenberg.NewContext(
-					gotenberg.ParsedFlags{
-						FlagSet: fs,
-					},
-					nil,
-				)
-			}(),
-			setEnv: func() {
-				err := os.Setenv("PORT", "foo")
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-			},
-			expectError: true,
-		},
 		{
 			scenario: "no valid routers",
 			ctx: func() *gotenberg.Context {
@@ -462,6 +462,7 @@ func TestApi_Validate(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
 		port        int
+		bindIp      string
 		tlsCertFile string
 		tlsKeyFile  string
 		rootPath    string
@@ -473,6 +474,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid port (< 1)",
 			port:        0,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -482,6 +484,17 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid port (> 65535)",
 			port:        65536,
+			bindIp:      "127.0.0.1",
+			rootPath:    "/foo/",
+			traceHeader: "foo",
+			routes:      nil,
+			middlewares: nil,
+			expectError: true,
+		},
+		{
+			scenario:    "invalid IP",
+			port:        10,
+			bindIp:      "foo",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -491,6 +504,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid TLS files: only cert file provided",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			tlsCertFile: "cert.pem",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
@@ -501,6 +515,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid TLS files: only key file provided",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			tlsKeyFile:  "key.pem",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
@@ -511,6 +526,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid root path: missing / prefix",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -520,6 +536,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid root path: missing / suffix",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo",
 			traceHeader: "foo",
 			routes:      nil,
@@ -529,6 +546,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid trace header",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "",
 			routes:      nil,
@@ -538,6 +556,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: empty path",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -551,6 +570,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: missing / prefix in path",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -564,6 +584,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid multipart route: no /forms prefix in path",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -578,6 +599,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: no method",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -592,6 +614,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: nil handler",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -607,6 +630,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid route: path already existing",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -627,6 +651,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "invalid middleware: nil handler",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes:      nil,
@@ -641,6 +666,7 @@ func TestApi_Validate(t *testing.T) {
 		{
 			scenario:    "success",
 			port:        10,
+			bindIp:      "127.0.0.1",
 			rootPath:    "/foo/",
 			traceHeader: "foo",
 			routes: []Route{
@@ -694,6 +720,7 @@ func TestApi_Validate(t *testing.T) {
 		t.Run(tc.scenario, func(t *testing.T) {
 			mod := Api{
 				port:                tc.port,
+				bindIp:              tc.bindIp,
 				tlsCertFile:         tc.tlsCertFile,
 				tlsKeyFile:          tc.tlsKeyFile,
 				rootPath:            tc.rootPath,
@@ -918,15 +945,36 @@ func TestApi_Start(t *testing.T) {
 }
 
 func TestApi_StartupMessage(t *testing.T) {
-	mod := Api{
+	for _, tc := range []struct {
-		port: 3000,
+		scenario      string
-	}
+		port          int
+		bindIp        string
+		expectMessage string
+	}{
+		{
+			scenario:      "no custom IP",
+			port:          3000,
+			bindIp:        "",
+			expectMessage: "server started on [::]:3000",
+		},
+		{
+			scenario:      "custom IP",
+			port:          3000,
+			bindIp:        "127.0.0.1",
+			expectMessage: "server started on 127.0.0.1:3000",
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			mod := Api{
+				port:   tc.port,
+				bindIp: tc.bindIp,
+			}
 
-	actual := mod.StartupMessage()
+			actual := mod.StartupMessage()
-	expect := "server listening on port 3000"
+			if actual != tc.expectMessage {
-
+				t.Errorf("expected '%s' but got '%s'", tc.expectMessage, actual)
-	if actual != expect {
+			}
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
+		})
 	}
 }
 

pkg/modules/api/context.go

@@ -13,6 +13,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"sync/atomic"
 	"time"
 
 	"github.com/google/uuid"
@@ -50,6 +51,28 @@ type Context struct {
 	context.Context
 }
 
+type trackingReader struct {
+	R            io.Reader
+	AddReadBytes func(n int64) error
+}
+
+func (t *trackingReader) Read(p []byte) (int, error) {
+	n, err := t.R.Read(p)
+	if n > 0 {
+		errAddRead := t.AddReadBytes(int64(n))
+		if errAddRead != nil {
+			return n, fmt.Errorf("add read bytes: %w", errAddRead)
+		}
+	}
+	if err != nil {
+		// It's a common practice in Go to return io.EOF unwrapped to signal
+		// the end of a data stream. Wrapping it can lead to unexpected
+		// behavior in standard library functions.
+		return n, err
+	}
+	return n, nil
+}
+
 type downloadFrom struct {
 	// Url is the URL to download a file from.
 	Url string `json:"url"`
@@ -65,9 +88,25 @@ func (o *osPathRename) Rename(oldpath, newpath string) error {
 }
 
 // newContext returns a [Context] by parsing a "multipart/form-data" request.
-func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSystem, timeout time.Duration, downloadFromCfg downloadFromConfig, traceHeader, trace string) (*Context, context.CancelFunc, error) {
+func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSystem, timeout time.Duration, bodyLimit int64, downloadFromCfg downloadFromConfig, traceHeader, trace string) (*Context, context.CancelFunc, error) {
 	processCtx, processCancel := context.WithTimeout(context.Background(), timeout)
 
+	// We want to make sure the multipart/form-data does not exceed a given
+	// limit. We consider: form fields (keys, values, files) and files
+	// downloaded remotely ("download from" feature).
+	var totalBytesRead atomic.Int64
+
+	addReadBytes := func(n int64) error {
+		newTotal := totalBytesRead.Add(n)
+		if bodyLimit != 0 && newTotal > bodyLimit {
+			return WrapError(
+				fmt.Errorf("body limit reached (> %d)", bodyLimit),
+				NewSentinelHttpError(http.StatusRequestEntityTooLarge, http.StatusText(http.StatusRequestEntityTooLarge)),
+			)
+		}
+		return nil
+	}
+
 	ctx := &Context{
 		outputPaths: make([]string, 0),
 		cancelled:   false,
@@ -129,6 +168,19 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 		return nil, cancel, fmt.Errorf("get multipart form: %w", err)
 	}
 
+	// This will ensure we do not exceed the body limit.
+	var formValuesSize int64
+	for key, valArray := range form.Value {
+		formValuesSize += int64(len(key))
+		for _, val := range valArray {
+			formValuesSize += int64(len(val))
+		}
+	}
+	err = addReadBytes(formValuesSize)
+	if err != nil {
+		return nil, cancel, fmt.Errorf("add read bytes: %w", err)
+	}
+
 	dirPath, err := fs.MkdirAll()
 	if err != nil {
 		return nil, cancel, fmt.Errorf("create working directory: %w", err)
@@ -262,9 +314,12 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 					}
 				}()
 
-				_, err = io.Copy(out, resp.Body)
+				// This will ensure we do not exceed the body limit.
+				reader := &trackingReader{R: resp.Body, AddReadBytes: addReadBytes}
+
+				_, err = io.Copy(out, reader)
 				if err != nil {
-					return fmt.Errorf("copy downloaded file from '%s' to local file: %v", dl.Url, err)
+					return fmt.Errorf("copy downloaded file from '%s' to local file: %w", dl.Url, err)
 				}
 
 				ctx.files[filename] = path
@@ -292,6 +347,9 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 			}
 		}()
 
+		// This will ensure we do not exceed the body limit.
+		reader := &trackingReader{R: in, AddReadBytes: addReadBytes}
+
 		// Avoid directory traversal and make sure filename characters are
 		// normalized.
 		// See: https://github.com/gotenberg/gotenberg/issues/662.
@@ -309,7 +367,7 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 			}
 		}()
 
-		_, err = io.Copy(out, in)
+		_, err = io.Copy(out, reader)
 		if err != nil {
 			return fmt.Errorf("copy multipart file to local file: %w", err)
 		}
@@ -331,6 +389,7 @@ func newContext(echoCtx echo.Context, logger *zap.Logger, fs *gotenberg.FileSyst
 
 	ctx.Log().Debug(fmt.Sprintf("form fields: %+v", ctx.values))
 	ctx.Log().Debug(fmt.Sprintf("form files: %+v", ctx.files))
+	ctx.Log().Debug(fmt.Sprintf("total bytes: %d", totalBytesRead.Load()))
 
 	return ctx, cancel, err
 }

pkg/modules/api/context_test.go

@@ -95,6 +95,7 @@ func TestNewContext(t *testing.T) {
 	for _, tc := range []struct {
 		scenario         string
 		request          *http.Request
+		bodyLimit        int64
 		downloadFromCfg  downloadFromConfig
 		downloadFromSrv  *echo.Echo
 		expectContext    *Context
@@ -143,6 +144,95 @@ func TestNewContext(t *testing.T) {
 			expectHttpError:  true,
 			expectHttpStatus: http.StatusBadRequest,
 		},
+		{
+			scenario: "request entity too large: form values",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("key", "value")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			bodyLimit:        1,
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusRequestEntityTooLarge,
+		},
+		{
+			scenario: "request entity too large: downloadFrom",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				err := writer.WriteField("downloadFrom", `[{"url":"http://localhost:80/"}]`)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			bodyLimit: 45, // form values = 44 bytes.
+			downloadFromSrv: func() *echo.Echo {
+				srv := echo.New()
+				srv.HideBanner = true
+				srv.GET("/", func(c echo.Context) error {
+					c.Response().Header().Set(echo.HeaderContentDisposition, `attachment; filename="bar.txt"`)
+					c.Response().Header().Set(echo.HeaderContentType, "text/plain")
+					return c.String(http.StatusOK, http.StatusText(http.StatusOK))
+				})
+				return srv
+			}(),
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusRequestEntityTooLarge,
+		},
+		{
+			scenario: "request entity too large: form files",
+			request: func() *http.Request {
+				body := &bytes.Buffer{}
+				writer := multipart.NewWriter(body)
+				defer func() {
+					err := writer.Close()
+					if err != nil {
+						t.Fatalf("expected no error but got: %v", err)
+					}
+				}()
+				part, err := writer.CreateFormFile("foo.txt", "foo.txt")
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				_, err = part.Write([]byte("foo"))
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+				req := httptest.NewRequest(http.MethodPost, "/", body)
+				req.Header.Set(echo.HeaderContentType, writer.FormDataContentType())
+				return req
+			}(),
+			bodyLimit:        1,
+			downloadFromCfg:  defaultDownloadFromCfg,
+			expectError:      true,
+			expectHttpError:  true,
+			expectHttpStatus: http.StatusRequestEntityTooLarge,
+		},
 		{
 			scenario: "invalid downloadFrom form field: cannot unmarshal",
 			request: func() *http.Request {
@@ -458,7 +548,7 @@ func TestNewContext(t *testing.T) {
 			}
 
 			handler := func(c echo.Context) error {
-				ctx, cancel, err := newContext(c, zap.NewNop(), gotenberg.NewFileSystem(), time.Duration(10)*time.Second, tc.downloadFromCfg, "Gotenberg-Trace", "123")
+				ctx, cancel, err := newContext(c, zap.NewNop(), gotenberg.NewFileSystem(), time.Duration(10)*time.Second, tc.bodyLimit, tc.downloadFromCfg, "Gotenberg-Trace", "123")
 				defer cancel()
 				// Context already cancelled.
 				defer cancel()

pkg/modules/api/middlewares.go

@@ -236,7 +236,7 @@ func basicAuthMiddleware(username, password string) echo.MiddlewareFunc {
 //
 //	ctx := c.Get("context").(*api.Context)
 //	cancel := c.Get("cancel").(context.CancelFunc)
-func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration, downloadFromCfg downloadFromConfig) echo.MiddlewareFunc {
+func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration, bodyLimit int64, downloadFromCfg downloadFromConfig) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			logger := c.Get("logger").(*zap.Logger)
@@ -245,7 +245,7 @@ func contextMiddleware(fs *gotenberg.FileSystem, timeout time.Duration, download
 
 			// We create a context with a timeout so that underlying processes are
 			// able to stop early and handle correctly a timeout scenario.
-			ctx, cancel, err := newContext(c, logger, fs, timeout, downloadFromCfg, traceHeader, trace)
+			ctx, cancel, err := newContext(c, logger, fs, timeout, bodyLimit, downloadFromCfg, traceHeader, trace)
 			if err != nil {
 				cancel()
 

pkg/modules/api/middlewares_test.go

@@ -462,7 +462,7 @@ func TestContextMiddleware(t *testing.T) {
 		c.Set("trace", "foo")
 		c.Set("startTime", time.Now())
 
-		err := contextMiddleware(gotenberg.NewFileSystem(), time.Duration(10)*time.Second, downloadFromConfig{})(tc.next)(c)
+		err := contextMiddleware(gotenberg.NewFileSystem(), time.Duration(10)*time.Second, 0, downloadFromConfig{})(tc.next)(c)
 
 		if tc.expectErr && err == nil {
 			t.Errorf("test %d: expected error but got: %v", i, err)

pkg/modules/chromium/browser.go

@@ -228,7 +228,6 @@ func (b *chromiumBrowser) pdf(ctx context.Context, logger *zap.Logger, url, outp
 		disableJavaScriptActionFunc(logger, b.arguments.disableJavaScript),
 		setCookiesActionFunc(logger, options.Cookies),
 		userAgentOverride(logger, options.UserAgent),
-		extraHttpHeadersActionFunc(logger, options.ExtraHttpHeaders),
 		navigateActionFunc(logger, url, options.SkipNetworkIdleEvent),
 		hideDefaultWhiteBackgroundActionFunc(logger, options.OmitBackground, options.PrintBackground),
 		forceExactColorsActionFunc(),
@@ -252,7 +251,6 @@ func (b *chromiumBrowser) screenshot(ctx context.Context, logger *zap.Logger, ur
 		disableJavaScriptActionFunc(logger, b.arguments.disableJavaScript),
 		setCookiesActionFunc(logger, options.Cookies),
 		userAgentOverride(logger, options.UserAgent),
-		extraHttpHeadersActionFunc(logger, options.ExtraHttpHeaders),
 		navigateActionFunc(logger, url, options.SkipNetworkIdleEvent),
 		hideDefaultWhiteBackgroundActionFunc(logger, options.OmitBackground, true),
 		forceExactColorsActionFunc(),
@@ -291,17 +289,35 @@ func (b *chromiumBrowser) do(ctx context.Context, logger *zap.Logger, url string
 	defer taskCancel()
 
 	// We validate all others requests against our allow / deny lists.
-	// If a request does not pass the validation, we make it fail.
+	// If a request does not pass the validation, we make it fail. It also set
-	listenForEventRequestPaused(taskCtx, logger, b.arguments.allowList, b.arguments.denyList)
+	// the extra HTTP headers, if any.
+	// See https://github.com/gotenberg/gotenberg/issues/1011.
+	listenForEventRequestPaused(taskCtx, logger, eventRequestPausedOptions{
+		allowList:        b.arguments.allowList,
+		denyList:         b.arguments.denyList,
+		extraHttpHeaders: options.ExtraHttpHeaders,
+	})
 
 	var (
-		invalidHttpStatusCode   error
+		invalidHttpStatusCode           error
-		invalidHttpStatusCodeMu sync.RWMutex
+		invalidHttpStatusCodeMu         sync.RWMutex
+		invalidResourceHttpStatusCode   error
+		invalidResourceHttpStatusCodeMu sync.RWMutex
 	)
 
-	// See https://github.com/gotenberg/gotenberg/issues/613.
+	// See:
-	if len(options.FailOnHttpStatusCodes) != 0 {
+	// https://github.com/gotenberg/gotenberg/issues/613.
-		listenForEventResponseReceived(taskCtx, logger, url, options.FailOnHttpStatusCodes, &invalidHttpStatusCode, &invalidHttpStatusCodeMu)
+	// https://github.com/gotenberg/gotenberg/issues/1021.
+	if len(options.FailOnHttpStatusCodes) != 0 || len(options.FailOnResourceHttpStatusCodes) != 0 {
+		listenForEventResponseReceived(taskCtx, logger, eventResponseReceivedOptions{
+			mainPageUrl:                     url,
+			failOnHttpStatusCodes:           options.FailOnHttpStatusCodes,
+			invalidHttpStatusCode:           &invalidHttpStatusCode,
+			invalidHttpStatusCodeMu:         &invalidHttpStatusCodeMu,
+			failOnResourceOnHttpStatusCode:  options.FailOnResourceHttpStatusCodes,
+			invalidResourceHttpStatusCode:   &invalidResourceHttpStatusCode,
+			invalidResourceHttpStatusCodeMu: &invalidResourceHttpStatusCodeMu,
+		})
 	}
 
 	var (
@@ -315,14 +331,22 @@ func (b *chromiumBrowser) do(ctx context.Context, logger *zap.Logger, url string
 	}
 
 	var (
-		loadingFailed   error
+		loadingFailed           error
-		loadingFailedMu sync.RWMutex
+		loadingFailedMu         sync.RWMutex
+		resourceLoadingFailed   error
+		resourceLoadingFailedMu sync.RWMutex
 	)
 
 	// See:
-	// https://github.com/gotenberg/gotenberg/issues/913
+	// https://github.com/gotenberg/gotenberg/issues/913.
-	// https://github.com/gotenberg/gotenberg/issues/959
+	// https://github.com/gotenberg/gotenberg/issues/959.
-	listenForEventLoadingFailed(taskCtx, logger, &loadingFailed, &loadingFailedMu)
+	// https://github.com/gotenberg/gotenberg/issues/1021.
+	listenForEventLoadingFailed(taskCtx, logger, eventLoadingFailedOptions{
+		loadingFailed:           &loadingFailed,
+		loadingFailedMu:         &loadingFailedMu,
+		resourceLoadingFailed:   &resourceLoadingFailed,
+		resourceLoadingFailedMu: &resourceLoadingFailedMu,
+	})
 
 	err = chromedp.Run(taskCtx, tasks...)
 	if err != nil {
@@ -351,6 +375,14 @@ func (b *chromiumBrowser) do(ctx context.Context, logger *zap.Logger, url string
 		return fmt.Errorf("%v: %w", invalidHttpStatusCode, ErrInvalidHttpStatusCode)
 	}
 
+	// See https://github.com/gotenberg/gotenberg/issues/1021.
+	invalidResourceHttpStatusCodeMu.RLock()
+	defer invalidResourceHttpStatusCodeMu.RUnlock()
+
+	if invalidResourceHttpStatusCode != nil {
+		return fmt.Errorf("%v: %w", invalidResourceHttpStatusCode, ErrInvalidResourceHttpStatusCode)
+	}
+
 	// See https://github.com/gotenberg/gotenberg/issues/262.
 	consoleExceptionsMu.RLock()
 	defer consoleExceptionsMu.RUnlock()
@@ -360,8 +392,8 @@ func (b *chromiumBrowser) do(ctx context.Context, logger *zap.Logger, url string
 	}
 
 	// See:
-	// https://github.com/gotenberg/gotenberg/issues/913
+	// https://github.com/gotenberg/gotenberg/issues/913.
-	// https://github.com/gotenberg/gotenberg/issues/959
+	// https://github.com/gotenberg/gotenberg/issues/959.
 	loadingFailedMu.RLock()
 	defer loadingFailedMu.RUnlock()
 
@@ -369,6 +401,13 @@ func (b *chromiumBrowser) do(ctx context.Context, logger *zap.Logger, url string
 		return fmt.Errorf("%v: %w", loadingFailed, ErrLoadingFailed)
 	}
 
+	// See https://github.com/gotenberg/gotenberg/issues/1021.
+	if options.FailOnResourceLoadingFailed {
+		if resourceLoadingFailed != nil {
+			return fmt.Errorf("%v: %w", resourceLoadingFailed, ErrResourceLoadingFailed)
+		}
+	}
+
 	return nil
 }
 

pkg/modules/chromium/browser_test.go

@@ -379,7 +379,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 			},
 		},
 		{
-			scenario: "skip networkIdle event",
+			scenario: "do not skip networkIdle event",
 			browser: newChromiumBrowser(
 				browserArguments{
 					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
@@ -404,13 +404,13 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 				return fs
 			}(),
 			options: PdfOptions{
-				Options: Options{SkipNetworkIdleEvent: true},
+				Options: Options{SkipNetworkIdleEvent: false},
 			},
 			noDeadline:  false,
 			start:       true,
 			expectError: false,
 			expectedLogEntries: []string{
-				"skipping network idle event",
+				"event networkIdle fired",
 			},
 		},
 		{
@@ -446,6 +446,44 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 			expectError:   true,
 			expectedError: ErrInvalidHttpStatusCode,
 		},
+		{
+			scenario: "ErrInvalidResourceHttpStatusCode",
+			browser: newChromiumBrowser(
+				browserArguments{
+					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
+					wsUrlReadTimeout: 5 * time.Second,
+					allowList:        regexp2.MustCompile("", 0),
+					denyList:         regexp2.MustCompile("", 0),
+				},
+			),
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem()
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/style.css", fs.WorkingDirPath()), []byte("body{font-family: Arial, Helvetica, sans-serif;}"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<html><head><link rel=\"stylesheet\" type=\"text/css\" href=\"style.css\"></head><body><h1>ErrInvalidResourceHttpStatusCode</h1></body></html>"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			options: PdfOptions{
+				Options: Options{FailOnResourceHttpStatusCodes: []int64{200}},
+			},
+			noDeadline:    false,
+			start:         true,
+			expectError:   true,
+			expectedError: ErrInvalidResourceHttpStatusCode,
+		},
 		{
 			scenario: "ErrConsoleExceptions",
 			browser: newChromiumBrowser(
@@ -505,6 +543,39 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 			expectError:   true,
 			expectedError: ErrLoadingFailed,
 		},
+		{
+			scenario: "ErrResourceLoadingFailed",
+			browser: newChromiumBrowser(
+				browserArguments{
+					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
+					wsUrlReadTimeout: 5 * time.Second,
+					allowList:        regexp2.MustCompile("", 0),
+					denyList:         regexp2.MustCompile("", 0),
+				},
+			),
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem()
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<html><head><link rel=\"stylesheet\" type=\"text/css\" href=\"http://localhost:100/style.css\"></head><body><h1>ErrResourceLoadingFailed</h1></body></html>"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			options: PdfOptions{
+				Options: Options{FailOnResourceLoadingFailed: true},
+			},
+			noDeadline:    false,
+			start:         true,
+			expectError:   true,
+			expectedError: ErrResourceLoadingFailed,
+		},
 		{
 			scenario: "clear cache",
 			browser: newChromiumBrowser(
@@ -702,8 +773,21 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 				return fs
 			}(),
 			options: PdfOptions{
-				Options: Options{ExtraHttpHeaders: map[string]string{
+				Options: Options{ExtraHttpHeaders: []ExtraHttpHeader{
-					"X-Foo": "Bar",
+					{
+						Name:  "X-Foo",
+						Value: "foo",
+					},
+					{
+						Name:  "X-Bar",
+						Value: "bar",
+						Scope: regexp2.MustCompile(`.*index\.html.*`, 0),
+					},
+					{
+						Name:  "X-Baz",
+						Value: "baz",
+						Scope: regexp2.MustCompile(`.*another\.html.*`, 0),
+					},
 				}},
 			},
 			noDeadline:  false,
@@ -711,6 +795,10 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 			expectError: false,
 			expectedLogEntries: []string{
 				"extra HTTP headers:",
+				"extra HTTP header 'X-Foo' will be set for request URL",
+				"extra HTTP header 'X-Bar' (scoped) will be set for request URL",
+				"extra HTTP header 'X-Baz' (scoped) will not be set for request URL",
+				"setting extra HTTP headers for request URL",
 			},
 		},
 		{
@@ -1225,6 +1313,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 				"no cookies to set",
 				"no extra HTTP headers",
 				"navigate to",
+				"skipping network idle event",
 				"default white background not hidden",
 				"no emulated media type",
 				"no wait delay",
@@ -1452,7 +1541,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 			},
 		},
 		{
-			scenario: "skip networkIdle event",
+			scenario: "do not skip networkIdle event",
 			browser: newChromiumBrowser(
 				browserArguments{
 					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
@@ -1477,13 +1566,13 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 				return fs
 			}(),
 			options: ScreenshotOptions{
-				Options: Options{SkipNetworkIdleEvent: true},
+				Options: Options{SkipNetworkIdleEvent: false},
 			},
 			noDeadline:  false,
 			start:       true,
 			expectError: false,
 			expectedLogEntries: []string{
-				"skipping network idle event",
+				"event networkIdle fired",
 			},
 		},
 		{
@@ -1519,6 +1608,44 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 			expectError:   true,
 			expectedError: ErrInvalidHttpStatusCode,
 		},
+		{
+			scenario: "ErrInvalidResourceHttpStatusCode",
+			browser: newChromiumBrowser(
+				browserArguments{
+					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
+					wsUrlReadTimeout: 5 * time.Second,
+					allowList:        regexp2.MustCompile("", 0),
+					denyList:         regexp2.MustCompile("", 0),
+				},
+			),
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem()
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/style.css", fs.WorkingDirPath()), []byte("body{font-family: Arial, Helvetica, sans-serif;}"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<html><head><link rel=\"stylesheet\" type=\"text/css\" href=\"style.css\"></head><body><h1>ErrInvalidResourceHttpStatusCode</h1></body></html>"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			options: ScreenshotOptions{
+				Options: Options{FailOnResourceHttpStatusCodes: []int64{299}},
+			},
+			noDeadline:    false,
+			start:         true,
+			expectError:   true,
+			expectedError: ErrInvalidResourceHttpStatusCode,
+		},
 		{
 			scenario: "ErrConsoleExceptions",
 			browser: newChromiumBrowser(
@@ -1562,7 +1689,6 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 					denyList:         regexp2.MustCompile("", 0),
 				},
 			),
-
 			fs: func() *gotenberg.FileSystem {
 				fs := gotenberg.NewFileSystem()
 
@@ -1579,6 +1705,39 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 			expectError:   true,
 			expectedError: ErrLoadingFailed,
 		},
+		{
+			scenario: "ErrResourceLoadingFailed",
+			browser: newChromiumBrowser(
+				browserArguments{
+					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
+					wsUrlReadTimeout: 5 * time.Second,
+					allowList:        regexp2.MustCompile("", 0),
+					denyList:         regexp2.MustCompile("", 0),
+				},
+			),
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem()
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<html><head><link rel=\"stylesheet\" type=\"text/css\" href=\"http://localhost:100/style.css\"></head><body><h1>ErrResourceLoadingFailed</h1></body></html>"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			options: ScreenshotOptions{
+				Options: Options{FailOnResourceLoadingFailed: true},
+			},
+			noDeadline:    false,
+			start:         true,
+			expectError:   true,
+			expectedError: ErrResourceLoadingFailed,
+		},
 		{
 			scenario: "clear cache",
 			browser: newChromiumBrowser(
@@ -1715,6 +1874,41 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 				"set cookie",
 			},
 		},
+		{
+			scenario: "user agent override",
+			browser: newChromiumBrowser(
+				browserArguments{
+					binPath:          os.Getenv("CHROMIUM_BIN_PATH"),
+					wsUrlReadTimeout: 5 * time.Second,
+					allowList:        regexp2.MustCompile("", 0),
+					denyList:         regexp2.MustCompile("", 0),
+				},
+			),
+			fs: func() *gotenberg.FileSystem {
+				fs := gotenberg.NewFileSystem()
+
+				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
+				if err != nil {
+					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+				}
+
+				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>User-Agent override</h1>"), 0o755)
+				if err != nil {
+					t.Fatalf("expected no error but got: %v", err)
+				}
+
+				return fs
+			}(),
+			options: ScreenshotOptions{
+				Options: Options{UserAgent: "foo"},
+			},
+			noDeadline:  false,
+			start:       true,
+			expectError: false,
+			expectedLogEntries: []string{
+				fmt.Sprintf("user agent override: foo"),
+			},
+		},
 		{
 			scenario: "extra HTTP headers",
 			browser: newChromiumBrowser(
@@ -1741,8 +1935,21 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 				return fs
 			}(),
 			options: ScreenshotOptions{
-				Options: Options{ExtraHttpHeaders: map[string]string{
+				Options: Options{ExtraHttpHeaders: []ExtraHttpHeader{
-					"X-Foo": "Bar",
+					{
+						Name:  "X-Foo",
+						Value: "foo",
+					},
+					{
+						Name:  "X-Bar",
+						Value: "bar",
+						Scope: regexp2.MustCompile(`.*index\.html.*`, 0),
+					},
+					{
+						Name:  "X-Baz",
+						Value: "baz",
+						Scope: regexp2.MustCompile(`.*another\.html.*`, 0),
+					},
 				}},
 			},
 			noDeadline:  false,
@@ -1750,6 +1957,10 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 			expectError: false,
 			expectedLogEntries: []string{
 				"extra HTTP headers:",
+				"extra HTTP header 'X-Foo' will be set for request URL",
+				"extra HTTP header 'X-Bar' (scoped) will be set for request URL",
+				"extra HTTP header 'X-Baz' (scoped) will not be set for request URL",
+				"setting extra HTTP headers for request URL",
 			},
 		},
 		{
@@ -2184,6 +2395,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 				"no user agent override",
 				"no extra HTTP headers",
 				"navigate to",
+				"skipping network idle event",
 				"default white background not hidden",
 				"no emulated media type",
 				"no wait delay",

pkg/modules/chromium/chromium.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/alexliesenfeld/health"
 	"github.com/chromedp/cdproto/network"
+	"github.com/dlclark/regexp2"
 	flag "github.com/spf13/pflag"
 	"go.uber.org/zap"
 
@@ -37,14 +38,22 @@ var (
 	// matches with one of the entry in [Options.FailOnHttpStatusCodes].
 	ErrInvalidHttpStatusCode = errors.New("invalid HTTP status code")
 
+	// ErrInvalidResourceHttpStatusCode happens when the status code from one
+	// or more resources matches with one of the entry in
+	// [Options.FailOnResourceHttpStatusCodes].
+	ErrInvalidResourceHttpStatusCode = errors.New("invalid resource HTTP status code")
+
 	// ErrConsoleExceptions happens when there are exceptions in the Chromium
 	// console. It also happens only if the [Options.FailOnConsoleExceptions]
 	// is set to true.
 	ErrConsoleExceptions = errors.New("console exceptions")
 
-	// ErrLoadingFailed happens when a URL failed to load.
+	// ErrLoadingFailed happens when the main page failed to load.
 	ErrLoadingFailed = errors.New("loading failed")
 
+	// ErrResourceLoadingFailed happens when one or more resources failed to load.
+	ErrResourceLoadingFailed = errors.New("resource loading failed")
+
 	// PDF specific.
 
 	// ErrOmitBackgroundWithoutPrintBackground happens if
@@ -85,6 +94,14 @@ type Options struct {
 	// code from the main page matches with one of its entries.
 	FailOnHttpStatusCodes []int64
 
+	// FailOnResourceHttpStatusCodes sets if the conversion should fail if the
+	// status code from at least one resource matches with one if its entries.
+	FailOnResourceHttpStatusCodes []int64
+
+	// FailOnResourceLoadingFailed sets if the conversion should fail like the
+	// main page if Chromium fails to load at least one resource.
+	FailOnResourceLoadingFailed bool
+
 	// FailOnConsoleExceptions sets if the conversion should fail if there are
 	// exceptions in the Chromium console.
 	FailOnConsoleExceptions bool
@@ -109,7 +126,7 @@ type Options struct {
 
 	// ExtraHttpHeaders are extra HTTP headers to send by Chromium while
 	// loading he HTML document.
-	ExtraHttpHeaders map[string]string
+	ExtraHttpHeaders []ExtraHttpHeader
 
 	// EmulatedMediaType is the media type to emulate, either "screen" or
 	// "print".
@@ -123,17 +140,19 @@ type Options struct {
 // DefaultOptions returns the default values for Options.
 func DefaultOptions() Options {
 	return Options{
-		SkipNetworkIdleEvent:    false,
+		SkipNetworkIdleEvent:          true,
-		FailOnHttpStatusCodes:   []int64{499, 599},
+		FailOnHttpStatusCodes:         []int64{499, 599},
-		FailOnConsoleExceptions: false,
+		FailOnResourceHttpStatusCodes: nil,
-		WaitDelay:               0,
+		FailOnResourceLoadingFailed:   false,
-		WaitWindowStatus:        "",
+		FailOnConsoleExceptions:       false,
-		WaitForExpression:       "",
+		WaitDelay:                     0,
-		Cookies:                 nil,
+		WaitWindowStatus:              "",
-		UserAgent:               "",
+		WaitForExpression:             "",
-		ExtraHttpHeaders:        nil,
+		Cookies:                       nil,
-		EmulatedMediaType:       "",
+		UserAgent:                     "",
-		OmitBackground:          false,
+		ExtraHttpHeaders:              nil,
+		EmulatedMediaType:             "",
+		OmitBackground:                false,
 	}
 }
 
@@ -194,26 +213,31 @@ type PdfOptions struct {
 	// PreferCssPageSize defines whether to prefer page size as defined by CSS.
 	// If false, the content will be scaled to fit the paper size.
 	PreferCssPageSize bool
+
+	// GenerateDocumentOutline defines whether the document outline should be
+	// embedded into the PDF.
+	GenerateDocumentOutline bool
 }
 
 // DefaultPdfOptions returns the default values for PdfOptions.
 func DefaultPdfOptions() PdfOptions {
 	return PdfOptions{
-		Options:           DefaultOptions(),
+		Options:                 DefaultOptions(),
-		Landscape:         false,
+		Landscape:               false,
-		PrintBackground:   false,
+		PrintBackground:         false,
-		Scale:             1.0,
+		Scale:                   1.0,
-		SinglePage:        false,
+		SinglePage:              false,
-		PaperWidth:        8.5,
+		PaperWidth:              8.5,
-		PaperHeight:       11,
+		PaperHeight:             11,
-		MarginTop:         0.39,
+		MarginTop:               0.39,
-		MarginBottom:      0.39,
+		MarginBottom:            0.39,
-		MarginLeft:        0.39,
+		MarginLeft:              0.39,
-		MarginRight:       0.39,
+		MarginRight:             0.39,
-		PageRanges:        "",
+		PageRanges:              "",
-		HeaderTemplate:    "<html><head></head><body></body></html>",
+		HeaderTemplate:          "<html><head></head><body></body></html>",
-		FooterTemplate:    "<html><head></head><body></body></html>",
+		FooterTemplate:          "<html><head></head><body></body></html>",
-		PreferCssPageSize: false,
+		PreferCssPageSize:       false,
+		GenerateDocumentOutline: false,
 	}
 }
 
@@ -289,6 +313,22 @@ type Cookie struct {
 	SameSite network.CookieSameSite `json:"sameSite,omitempty"`
 }
 
+// ExtraHttpHeader are extra HTTP headers to send by Chromium.
+type ExtraHttpHeader struct {
+	// Name is the header name.
+	// Required.
+	Name string
+
+	// Value is the header value.
+	// Required.
+	Value string
+
+	// Scope is the header scope. If nil, the header will be applied to ALL
+	// requests from the page.
+	// Optional.
+	Scope *regexp2.Regexp
+}
+
 // Api helps to interact with Chromium for converting HTML documents to PDF.
 type Api interface {
 	Pdf(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error

pkg/modules/chromium/events.go

@@ -3,6 +3,7 @@ package chromium
 import (
 	"context"
 	"fmt"
+	"net/http"
 	"slices"
 	"sync"
 
@@ -20,10 +21,22 @@ import (
 	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
 )
 
+type eventRequestPausedOptions struct {
+	allowList, denyList *regexp2.Regexp
+	extraHttpHeaders    []ExtraHttpHeader
+}
+
 // listenForEventRequestPaused listens for requests to check if they are
-// allowed or not.network.SetBlockedURLS()
+// allowed or not.  It also set the extra HTTP headers, if any.
+// See https://github.com/gotenberg/gotenberg/issues/1011.
 // TODO: https://chromedevtools.github.io/devtools-protocol/tot/Network/#method-setBlockedURLs (experimental for now).
-func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowList *regexp2.Regexp, denyList *regexp2.Regexp) {
+func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, options eventRequestPausedOptions) {
+	if len(options.extraHttpHeaders) == 0 {
+		logger.Debug("no extra HTTP headers")
+	} else {
+		logger.Debug(fmt.Sprintf("extra HTTP headers: %+v", options.extraHttpHeaders))
+	}
+
 	chromedp.ListenTarget(ctx, func(ev interface{}) {
 		switch e := ev.(type) {
 		case *fetch.EventRequestPaused:
@@ -37,7 +50,7 @@ func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowL
 					return
 				}
 
-				err := gotenberg.FilterDeadline(allowList, denyList, e.Request.URL, deadline)
+				err := gotenberg.FilterDeadline(options.allowList, options.denyList, e.Request.URL, deadline)
 				if err != nil {
 					logger.Warn(err.Error())
 					allow = false
@@ -46,33 +59,114 @@ func listenForEventRequestPaused(ctx context.Context, logger *zap.Logger, allowL
 				cctx := chromedp.FromContext(ctx)
 				executorCtx := cdp.WithExecutor(ctx, cctx.Target)
 
-				if allow {
+				if !allow {
-					req := fetch.ContinueRequest(e.RequestID)
+					req := fetch.FailRequest(e.RequestID, network.ErrorReasonAccessDenied)
 					err = req.Do(executorCtx)
 					if err != nil {
-						logger.Error(fmt.Sprintf("continue request: %s", err))
+						logger.Error(fmt.Sprintf("fail request: %s", err))
 					}
 					return
 				}
 
-				req := fetch.FailRequest(e.RequestID, network.ErrorReasonAccessDenied)
+				req := fetch.ContinueRequest(e.RequestID)
+
+				var extraHttpHeadersToSet []ExtraHttpHeader
+				if len(options.extraHttpHeaders) > 0 {
+					// The user want to set extra HTTP headers.
+
+					// First, we have to check if at least one header has to be
+					// set for current request.
+					for _, header := range options.extraHttpHeaders {
+						if header.Scope == nil {
+							// Non-scoped header.
+							logger.Debug(fmt.Sprintf("extra HTTP header '%s' will be set for request URL '%s'", header.Name, e.Request.URL))
+							extraHttpHeadersToSet = append(extraHttpHeadersToSet, header)
+							continue
+						}
+
+						ok, err := header.Scope.MatchString(e.Request.URL)
+						if err != nil {
+							logger.Error(fmt.Sprintf("fail to match extra HTTP header '%s' scope with URL '%s': %s", header.Name, e.Request.URL, err))
+						} else if ok {
+							logger.Debug(fmt.Sprintf("extra HTTP header '%s' (scoped) will be set for request URL '%s'", header.Name, e.Request.URL))
+							extraHttpHeadersToSet = append(extraHttpHeadersToSet, header)
+						} else {
+							logger.Debug(fmt.Sprintf("scoped extra HTTP header '%s' (scoped) will not be set for request URL '%s'", header.Name, e.Request.URL))
+						}
+					}
+				}
+
+				if len(extraHttpHeadersToSet) > 0 {
+					logger.Debug(fmt.Sprintf("setting extra HTTP headers for request URL '%s': %+v", e.Request.URL, extraHttpHeadersToSet))
+
+					originalHeaders := e.Request.Headers
+					headers := make(map[string]string)
+
+					for key, value := range originalHeaders {
+						strValue, ok := value.(string)
+						if ok {
+							headers[key] = strValue
+						} else {
+							logger.Error(fmt.Sprintf("ignoring header '%s' for URL '%s' since it cannot be cast to a string", key, e.Request.URL))
+						}
+					}
+
+					var headersEntries []*fetch.HeaderEntry
+					for key, value := range headers {
+						headersEntries = append(headersEntries, &fetch.HeaderEntry{
+							Name:  key,
+							Value: value,
+						})
+					}
+					for _, header := range extraHttpHeadersToSet {
+						headersEntries = append(headersEntries, &fetch.HeaderEntry{
+							Name:  header.Name,
+							Value: header.Value,
+						})
+					}
+
+					req.Headers = headersEntries
+				}
+
 				err = req.Do(executorCtx)
 				if err != nil {
-					logger.Error(fmt.Sprintf("fail request: %s", err))
+					logger.Error(fmt.Sprintf("continue request: %s", err))
 				}
 			}()
 		}
 	})
 }
 
+type eventResponseReceivedOptions struct {
+	mainPageUrl                     string
+	failOnHttpStatusCodes           []int64
+	invalidHttpStatusCode           *error
+	invalidHttpStatusCodeMu         *sync.RWMutex
+	failOnResourceOnHttpStatusCode  []int64
+	invalidResourceHttpStatusCode   *error
+	invalidResourceHttpStatusCodeMu *sync.RWMutex
+}
+
 // listenForEventResponseReceived listens for an invalid HTTP status code that
-// is returned by the main page.
+// is returned by the main page or by one or more resources.
-// See https://github.com/gotenberg/gotenberg/issues/613.
+// See:
-func listenForEventResponseReceived(ctx context.Context, logger *zap.Logger, url string, failOnHttpStatusCodes []int64, invalidHttpStatusCode *error, invalidHttpStatusCodeMu *sync.RWMutex) {
+// https://github.com/gotenberg/gotenberg/issues/613.
+// https://github.com/gotenberg/gotenberg/issues/1021.
+func listenForEventResponseReceived(
+	ctx context.Context,
+	logger *zap.Logger,
+	options eventResponseReceivedOptions,
+) {
 	for _, code := range []int64{199, 299, 399, 499, 599} {
-		if slices.Contains(failOnHttpStatusCodes, code) {
+		if slices.Contains(options.failOnHttpStatusCodes, code) {
 			for i := code - 99; i <= code; i++ {
-				failOnHttpStatusCodes = append(failOnHttpStatusCodes, i)
+				options.failOnHttpStatusCodes = append(options.failOnHttpStatusCodes, i)
+			}
+		}
+
+		if slices.Contains(options.failOnResourceOnHttpStatusCode, code) {
+			for i := code - 99; i <= code; i++ {
+				options.failOnResourceOnHttpStatusCode = append(options.failOnResourceOnHttpStatusCode, i)
 			}
 		}
 	}
@@ -80,41 +174,53 @@ func listenForEventResponseReceived(ctx context.Context, logger *zap.Logger, url
 	chromedp.ListenTarget(ctx, func(ev interface{}) {
 		switch ev := ev.(type) {
 		case *network.EventResponseReceived:
-			if ev.Response.URL != url {
+			if ev.Response.URL == options.mainPageUrl {
+				logger.Debug(fmt.Sprintf("event EventResponseReceived fired for main page: %+v", ev.Response))
+
+				if slices.Contains(options.failOnHttpStatusCodes, ev.Response.Status) {
+					options.invalidHttpStatusCodeMu.Lock()
+					defer options.invalidHttpStatusCodeMu.Unlock()
+
+					*options.invalidHttpStatusCode = fmt.Errorf("%d: %s", ev.Response.Status, ev.Response.StatusText)
+				}
+
 				return
 			}
 
-			logger.Debug(fmt.Sprintf("event EventResponseReceived fired for main page: %+v", ev.Response))
+			logger.Debug(fmt.Sprintf("event EventResponseReceived fired for a resource: %+v", ev.Response))
 
-			if slices.Contains(failOnHttpStatusCodes, ev.Response.Status) {
+			if slices.Contains(options.failOnResourceOnHttpStatusCode, ev.Response.Status) {
-				invalidHttpStatusCodeMu.Lock()
+				options.invalidResourceHttpStatusCodeMu.Lock()
-				defer invalidHttpStatusCodeMu.Unlock()
+				defer options.invalidResourceHttpStatusCodeMu.Unlock()
 
-				*invalidHttpStatusCode = fmt.Errorf("%d: %s", ev.Response.Status, ev.Response.StatusText)
+				*options.invalidResourceHttpStatusCode = multierr.Append(
+					*options.invalidResourceHttpStatusCode,
+					fmt.Errorf("%s - %d: %s", ev.Response.URL, ev.Response.Status, http.StatusText(int(ev.Response.Status))),
+				)
 			}
 		}
 	})
 }
 
+type eventLoadingFailedOptions struct {
+	loadingFailed           *error
+	loadingFailedMu         *sync.RWMutex
+	resourceLoadingFailed   *error
+	resourceLoadingFailedMu *sync.RWMutex
+}
+
 // listenForEventLoadingFailed listens for an event indicating that the main
-// page failed to load.
+// page or one or more resources failed to load.
 // See:
 // https://github.com/gotenberg/gotenberg/issues/913.
 // https://github.com/gotenberg/gotenberg/issues/959.
-func listenForEventLoadingFailed(ctx context.Context, logger *zap.Logger, loadingFailed *error, loadingFailedMu *sync.RWMutex) {
+// https://github.com/gotenberg/gotenberg/issues/1021.
+func listenForEventLoadingFailed(ctx context.Context, logger *zap.Logger, options eventLoadingFailedOptions) {
 	chromedp.ListenTarget(ctx, func(ev interface{}) {
 		switch ev := ev.(type) {
 		case *network.EventLoadingFailed:
 			logger.Debug(fmt.Sprintf("event EventLoadingFailed fired: %+v", ev.ErrorText))
 
-			if ev.Type != network.ResourceTypeDocument {
-				logger.Debug("skip EventLoadingFailed: is not resource type Document")
-				return
-			}
-
-			// Supposition: except iframe, an event loading failed with a
-			// resource type Document is about the main page.
-
 			// We are looking for common errors.
 			// TODO: sufficient?
 			errors := []string{
@@ -128,16 +234,35 @@ func listenForEventLoadingFailed(ctx context.Context, logger *zap.Logger, loadin
 				"net::ERR_ADDRESS_UNREACHABLE",
 				"net::ERR_BLOCKED_BY_CLIENT",
 				"net::ERR_BLOCKED_BY_RESPONSE",
+				"net::ERR_FILE_NOT_FOUND",
 			}
 			if !slices.Contains(errors, ev.ErrorText) {
 				logger.Debug(fmt.Sprintf("skip EventLoadingFailed: '%s' is not part of %+v", ev.ErrorText, errors))
 				return
 			}
 
-			loadingFailedMu.Lock()
+			if ev.Type == network.ResourceTypeDocument {
-			defer loadingFailedMu.Unlock()
+				// Supposition: except iframe, an event loading failed with a
+				// resource type Document is about the main page.
+				logger.Debug("event EventLoadingFailed fired for main page")
 
-			*loadingFailed = fmt.Errorf("%s", ev.ErrorText)
+				options.loadingFailedMu.Lock()
+				defer options.loadingFailedMu.Unlock()
+
+				*options.loadingFailed = fmt.Errorf("%s", ev.ErrorText)
+
+				return
+			}
+
+			logger.Debug("event EventLoadingFailed fired for a resource")
+
+			options.resourceLoadingFailedMu.Lock()
+			defer options.resourceLoadingFailedMu.Unlock()
+
+			*options.resourceLoadingFailed = multierr.Append(
+				*options.resourceLoadingFailed,
+				fmt.Errorf("resource %s: %s", ev.Type, ev.ErrorText),
+			)
 		}
 	})
 }

pkg/modules/chromium/routes.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/dlclark/regexp2"
 	"github.com/labstack/echo/v4"
 	"github.com/microcosm-cc/bluemonday"
 	"github.com/russross/blackfriday/v2"
@@ -28,17 +29,19 @@ func FormDataChromiumOptions(ctx *api.Context) (*api.FormData, Options) {
 	defaultOptions := DefaultOptions()
 
 	var (
-		skipNetworkIdleEvent    bool
+		skipNetworkIdleEvent          bool
-		failOnHttpStatusCodes   []int64
+		failOnHttpStatusCodes         []int64
-		failOnConsoleExceptions bool
+		failOnResourceHttpStatusCodes []int64
-		waitDelay               time.Duration
+		failOnResourceLoadingFailed   bool
-		waitWindowStatus        string
+		failOnConsoleExceptions       bool
-		waitForExpression       string
+		waitDelay                     time.Duration
-		cookies                 []Cookie
+		waitWindowStatus              string
-		userAgent               string
+		waitForExpression             string
-		extraHttpHeaders        map[string]string
+		cookies                       []Cookie
-		emulatedMediaType       string
+		userAgent                     string
-		omitBackground          bool
+		extraHttpHeaders              []ExtraHttpHeader
+		emulatedMediaType             string
+		omitBackground                bool
 	)
 
 	form := ctx.FormData().
@@ -56,6 +59,20 @@ func FormDataChromiumOptions(ctx *api.Context) (*api.FormData, Options) {
 
 			return nil
 		}).
+		Custom("failOnResourceHttpStatusCodes", func(value string) error {
+			if value == "" {
+				failOnResourceHttpStatusCodes = defaultOptions.FailOnResourceHttpStatusCodes
+				return nil
+			}
+
+			err := json.Unmarshal([]byte(value), &failOnResourceHttpStatusCodes)
+			if err != nil {
+				return fmt.Errorf("unmarshal failOnResourceHttpStatusCodes: %w", err)
+			}
+
+			return nil
+		}).
+		Bool("failOnResourceLoadingFailed", &failOnResourceLoadingFailed, defaultOptions.FailOnResourceLoadingFailed).
 		Bool("failOnConsoleExceptions", &failOnConsoleExceptions, defaultOptions.FailOnConsoleExceptions).
 		Duration("waitDelay", &waitDelay, defaultOptions.WaitDelay).
 		String("waitWindowStatus", &waitWindowStatus, defaultOptions.WaitWindowStatus).
@@ -86,12 +103,59 @@ func FormDataChromiumOptions(ctx *api.Context) (*api.FormData, Options) {
 				return nil
 			}
 
-			err := json.Unmarshal([]byte(value), &extraHttpHeaders)
+			var headers map[string]string
+			err := json.Unmarshal([]byte(value), &headers)
 			if err != nil {
 				return fmt.Errorf("unmarshal extraHttpHeaders: %w", err)
 			}
 
-			return nil
+			for k, v := range headers {
+				var scope string
+				var valueTokens []string
+				var invalidScopeToken bool
+
+				tokens := strings.Split(v, ";")
+				for _, token := range tokens {
+					if strings.HasPrefix(strings.ToLower(strings.TrimSpace(token)), "scope") {
+						tokenNoSpaces := strings.Join(strings.Fields(token), "")
+						parts := strings.SplitN(tokenNoSpaces, "=", 2)
+
+						if len(parts) == 2 && strings.ToLower(parts[0]) == "scope" && parts[1] != "" {
+							scope = parts[1]
+						} else {
+							err = multierr.Append(err, fmt.Errorf("invalid scope '%s' for header '%s'", scope, k))
+							invalidScopeToken = true
+							break
+						}
+					} else {
+						if token != "" {
+							valueTokens = append(valueTokens, token)
+						}
+					}
+				}
+
+				if invalidScopeToken {
+					continue
+				}
+
+				var scopeRegexp *regexp2.Regexp
+				if len(scope) > 0 {
+					p, errCompile := regexp2.Compile(scope, 0)
+					if errCompile != nil {
+						err = multierr.Append(err, fmt.Errorf("invalid scope regex pattern for header '%s': %w", k, errCompile))
+						continue
+					}
+					scopeRegexp = p
+				}
+
+				extraHttpHeaders = append(extraHttpHeaders, ExtraHttpHeader{
+					Name:  k,
+					Value: strings.Join(valueTokens, "; "),
+					Scope: scopeRegexp,
+				})
+			}
+
+			return err
 		}).
 		Custom("emulatedMediaType", func(value string) error {
 			if value == "" {
@@ -110,17 +174,19 @@ func FormDataChromiumOptions(ctx *api.Context) (*api.FormData, Options) {
 		Bool("omitBackground", &omitBackground, defaultOptions.OmitBackground)
 
 	options := Options{
-		SkipNetworkIdleEvent:    skipNetworkIdleEvent,
+		SkipNetworkIdleEvent:          skipNetworkIdleEvent,
-		FailOnHttpStatusCodes:   failOnHttpStatusCodes,
+		FailOnHttpStatusCodes:         failOnHttpStatusCodes,
-		FailOnConsoleExceptions: failOnConsoleExceptions,
+		FailOnResourceHttpStatusCodes: failOnResourceHttpStatusCodes,
-		WaitDelay:               waitDelay,
+		FailOnResourceLoadingFailed:   failOnResourceLoadingFailed,
-		WaitWindowStatus:        waitWindowStatus,
+		FailOnConsoleExceptions:       failOnConsoleExceptions,
-		WaitForExpression:       waitForExpression,
+		WaitDelay:                     waitDelay,
-		Cookies:                 cookies,
+		WaitWindowStatus:              waitWindowStatus,
-		UserAgent:               userAgent,
+		WaitForExpression:             waitForExpression,
-		ExtraHttpHeaders:        extraHttpHeaders,
+		Cookies:                       cookies,
-		EmulatedMediaType:       emulatedMediaType,
+		UserAgent:                     userAgent,
-		OmitBackground:          omitBackground,
+		ExtraHttpHeaders:              extraHttpHeaders,
+		EmulatedMediaType:             emulatedMediaType,
+		OmitBackground:                omitBackground,
 	}
 
 	return form, options
@@ -139,6 +205,7 @@ func FormDataChromiumPdfOptions(ctx *api.Context) (*api.FormData, PdfOptions) {
 		pageRanges                                       string
 		headerTemplate, footerTemplate                   string
 		preferCssPageSize                                bool
+		generateDocumentOutline                          bool
 	)
 
 	form.
@@ -155,24 +222,26 @@ func FormDataChromiumPdfOptions(ctx *api.Context) (*api.FormData, PdfOptions) {
 		String("nativePageRanges", &pageRanges, defaultPdfOptions.PageRanges).
 		Content("header.html", &headerTemplate, defaultPdfOptions.HeaderTemplate).
 		Content("footer.html", &footerTemplate, defaultPdfOptions.FooterTemplate).
-		Bool("preferCssPageSize", &preferCssPageSize, defaultPdfOptions.PreferCssPageSize)
+		Bool("preferCssPageSize", &preferCssPageSize, defaultPdfOptions.PreferCssPageSize).
+		Bool("generateDocumentOutline", &generateDocumentOutline, defaultPdfOptions.GenerateDocumentOutline)
 
 	pdfOptions := PdfOptions{
-		Options:           options,
+		Options:                 options,
-		Landscape:         landscape,
+		Landscape:               landscape,
-		PrintBackground:   printBackground,
+		PrintBackground:         printBackground,
-		Scale:             scale,
+		Scale:                   scale,
-		SinglePage:        singlePage,
+		SinglePage:              singlePage,
-		PaperWidth:        paperWidth,
+		PaperWidth:              paperWidth,
-		PaperHeight:       paperHeight,
+		PaperHeight:             paperHeight,
-		MarginTop:         marginTop,
+		MarginTop:               marginTop,
-		MarginBottom:      marginBottom,
+		MarginBottom:            marginBottom,
-		MarginLeft:        marginLeft,
+		MarginLeft:              marginLeft,
-		MarginRight:       marginRight,
+		MarginRight:             marginRight,
-		PageRanges:        pageRanges,
+		PageRanges:              pageRanges,
-		HeaderTemplate:    headerTemplate,
+		HeaderTemplate:          headerTemplate,
-		FooterTemplate:    footerTemplate,
+		FooterTemplate:          footerTemplate,
-		PreferCssPageSize: preferCssPageSize,
+		PreferCssPageSize:       preferCssPageSize,
+		GenerateDocumentOutline: generateDocumentOutline,
 	}
 
 	return form, pdfOptions
@@ -678,12 +747,22 @@ func handleChromiumError(err error, options Options) error {
 		)
 	}
 
+	if errors.Is(err, ErrInvalidResourceHttpStatusCode) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Invalid HTTP status code from resources:\n%s", strings.ReplaceAll(err.Error(), fmt.Sprintf(": %s", ErrInvalidResourceHttpStatusCode.Error()), "")),
+			),
+		)
+	}
+
 	if errors.Is(err, ErrConsoleExceptions) {
 		return api.WrapError(
 			err,
 			api.NewSentinelHttpError(
 				http.StatusConflict,
-				fmt.Sprintf("Chromium console exceptions:\n %s", strings.ReplaceAll(err.Error(), ErrConsoleExceptions.Error(), "")),
+				fmt.Sprintf("Chromium console exceptions:\n%s", strings.ReplaceAll(err.Error(), ErrConsoleExceptions.Error(), "")),
 			),
 		)
 	}
@@ -698,5 +777,15 @@ func handleChromiumError(err error, options Options) error {
 		)
 	}
 
+	if errors.Is(err, ErrResourceLoadingFailed) {
+		return api.WrapError(
+			err,
+			api.NewSentinelHttpError(
+				http.StatusConflict,
+				fmt.Sprintf("Chromium failed to load resources: %v", strings.ReplaceAll(err.Error(), fmt.Sprintf(": %s", ErrResourceLoadingFailed.Error()), "")),
+			),
+		)
+	}
+
 	return err
 }

pkg/modules/chromium/routes_test.go

@@ -7,8 +7,10 @@ import (
 	"net/http"
 	"os"
 	"reflect"
+	"sort"
 	"testing"
 
+	"github.com/dlclark/regexp2"
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
 	"go.uber.org/zap"
@@ -19,14 +21,18 @@ import (
 
 func TestFormDataChromiumOptions(t *testing.T) {
 	for _, tc := range []struct {
-		scenario        string
+		scenario                string
-		ctx             *api.ContextMock
+		ctx                     *api.ContextMock
-		expectedOptions Options
+		expectedOptions         Options
+		compareWithoutDeepEqual bool
+		expectValidationError   bool
 	}{
 		{
-			scenario:        "no custom form fields",
+			scenario:                "no custom form fields",
-			ctx:             &api.ContextMock{Context: new(api.Context)},
+			ctx:                     &api.ContextMock{Context: new(api.Context)},
-			expectedOptions: DefaultOptions(),
+			expectedOptions:         DefaultOptions(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   false,
 		},
 		{
 			scenario: "invalid failOnHttpStatusCodes form field",
@@ -44,6 +50,8 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				options.FailOnHttpStatusCodes = nil
 				return options
 			}(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
 		},
 		{
 			scenario: "valid failOnHttpStatusCodes form field",
@@ -61,6 +69,46 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				options.FailOnHttpStatusCodes = []int64{399, 499, 599}
 				return options
 			}(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   false,
+		},
+		{
+			scenario: "invalid failOnResourceHttpStatusCodes form field",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetValues(map[string][]string{
+					"failOnResourceHttpStatusCodes": {
+						"foo",
+					},
+				})
+				return ctx
+			}(),
+			expectedOptions: func() Options {
+				options := DefaultOptions()
+				options.FailOnResourceHttpStatusCodes = nil
+				return options
+			}(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
+		},
+		{
+			scenario: "valid failOnResourceHttpStatusCodes form field",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetValues(map[string][]string{
+					"failOnResourceHttpStatusCodes": {
+						`[399,499,599]`,
+					},
+				})
+				return ctx
+			}(),
+			expectedOptions: func() Options {
+				options := DefaultOptions()
+				options.FailOnResourceHttpStatusCodes = []int64{399, 499, 599}
+				return options
+			}(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   false,
 		},
 		{
 			scenario: "invalid cookies form field",
@@ -73,7 +121,9 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				})
 				return ctx
 			}(),
-			expectedOptions: DefaultOptions(),
+			expectedOptions:         DefaultOptions(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
 		},
 		{
 			scenario: "invalid cookies form field (missing required values)",
@@ -93,6 +143,8 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				options.Cookies = []Cookie{{}}
 				return options
 			}(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
 		},
 		{
 			scenario: "valid cookies form field",
@@ -114,9 +166,11 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				}}
 				return options
 			}(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   false,
 		},
 		{
-			scenario: "invalid extraHttpHeaders form field",
+			scenario: "invalid extraHttpHeaders form field: cannot unmarshall",
 			ctx: func() *api.ContextMock {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetValues(map[string][]string{
@@ -126,7 +180,39 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				})
 				return ctx
 			}(),
-			expectedOptions: DefaultOptions(),
+			expectedOptions:         DefaultOptions(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
+		},
+		{
+			scenario: "invalid extraHttpHeaders form field: invalid scope",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetValues(map[string][]string{
+					"extraHttpHeaders": {
+						`{"foo":"bar;scope;;"}`,
+					},
+				})
+				return ctx
+			}(),
+			expectedOptions:         DefaultOptions(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
+		},
+		{
+			scenario: "invalid extraHttpHeaders form field: invalid scope regex pattern",
+			ctx: func() *api.ContextMock {
+				ctx := &api.ContextMock{Context: new(api.Context)}
+				ctx.SetValues(map[string][]string{
+					"extraHttpHeaders": {
+						`{"foo":"bar;scope=*."}`,
+					},
+				})
+				return ctx
+			}(),
+			expectedOptions:         DefaultOptions(),
+			compareWithoutDeepEqual: false,
+			expectValidationError:   true,
 		},
 		{
 			scenario: "valid extraHttpHeaders form field",
@@ -134,18 +220,28 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				ctx := &api.ContextMock{Context: new(api.Context)}
 				ctx.SetValues(map[string][]string{
 					"extraHttpHeaders": {
-						`{"foo":"bar"}`,
+						`{"foo":"bar","baz":"qux;scope=https?:\\/\\/([a-zA-Z0-9-]+\\.)*qux\\.com\\/.*"}`,
 					},
 				})
 				return ctx
 			}(),
 			expectedOptions: func() Options {
 				options := DefaultOptions()
-				options.ExtraHttpHeaders = map[string]string{
+				options.ExtraHttpHeaders = []ExtraHttpHeader{
-					"foo": "bar",
+					{
+						Name:  "foo",
+						Value: "bar",
+					},
+					{
+						Name:  "baz",
+						Value: "qux",
+						Scope: regexp2.MustCompile(`https?:\/\/([a-zA-Z0-9-]+\.)*qux\.com\/.*`, 0),
+					},
 				}
 				return options
 			}(),
+			compareWithoutDeepEqual: true,
+			expectValidationError:   false,
 		},
 		{
 			scenario: "invalid emulatedMediaType form field",
@@ -158,7 +254,8 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				})
 				return ctx
 			}(),
-			expectedOptions: DefaultOptions(),
+			expectedOptions:       DefaultOptions(),
+			expectValidationError: true,
 		},
 		{
 			scenario: "valid emulatedMediaType form field",
@@ -176,14 +273,61 @@ func TestFormDataChromiumOptions(t *testing.T) {
 				options.EmulatedMediaType = "screen"
 				return options
 			}(),
+			expectValidationError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			tc.ctx.SetLogger(zap.NewNop())
-			_, actual := FormDataChromiumOptions(tc.ctx.Context)
+			form, actual := FormDataChromiumOptions(tc.ctx.Context)
 
-			if !reflect.DeepEqual(actual, tc.expectedOptions) {
+			if tc.compareWithoutDeepEqual {
-				t.Fatalf("expected %+v but got: %+v", tc.expectedOptions, actual)
+				if len(tc.expectedOptions.ExtraHttpHeaders) != len(actual.ExtraHttpHeaders) {
+					t.Fatalf("expected %d extra HTTP headers, but got %d", len(tc.expectedOptions.ExtraHttpHeaders), len(actual.ExtraHttpHeaders))
+				}
+
+				sort.Slice(tc.expectedOptions.ExtraHttpHeaders, func(i, j int) bool {
+					return tc.expectedOptions.ExtraHttpHeaders[i].Name < tc.expectedOptions.ExtraHttpHeaders[j].Name
+				})
+				sort.Slice(actual.ExtraHttpHeaders, func(i, j int) bool {
+					return actual.ExtraHttpHeaders[i].Name < actual.ExtraHttpHeaders[j].Name
+				})
+
+				for i := range tc.expectedOptions.ExtraHttpHeaders {
+					if tc.expectedOptions.ExtraHttpHeaders[i].Name != actual.ExtraHttpHeaders[i].Name {
+						t.Fatalf("expected '%s' extra HTTP header, but got '%s'", tc.expectedOptions.ExtraHttpHeaders[i].Name, tc.expectedOptions.ExtraHttpHeaders[i].Name)
+					}
+
+					if tc.expectedOptions.ExtraHttpHeaders[i].Value != actual.ExtraHttpHeaders[i].Value {
+						t.Fatalf("expected '%s' as value for extra HTTP header '%s', but got '%s'", tc.expectedOptions.ExtraHttpHeaders[i].Value, tc.expectedOptions.ExtraHttpHeaders[i].Name, actual.ExtraHttpHeaders[i].Value)
+					}
+
+					var expectedScope string
+					if tc.expectedOptions.ExtraHttpHeaders[i].Scope != nil {
+						expectedScope = tc.expectedOptions.ExtraHttpHeaders[i].Scope.String()
+					}
+					var actualScope string
+					if actual.ExtraHttpHeaders[i].Scope != nil {
+						actualScope = actual.ExtraHttpHeaders[i].Scope.String()
+					}
+
+					if expectedScope != actualScope {
+						t.Fatalf("expected '%s' as scope for extra HTTP header '%s', but got '%s'", expectedScope, tc.expectedOptions.ExtraHttpHeaders[i].Name, actualScope)
+					}
+				}
+			} else {
+				if !reflect.DeepEqual(actual, tc.expectedOptions) {
+					t.Fatalf("expected %+v but got: %+v", tc.expectedOptions, actual)
+				}
+			}
+
+			err := form.Validate()
+
+			if tc.expectValidationError && err == nil {
+				t.Fatal("expected validation error but got none", err)
+			}
+
+			if !tc.expectValidationError && err != nil {
+				t.Fatalf("expected no validation error but got: %v", err)
 			}
 		})
 	}
@@ -191,14 +335,16 @@ func TestFormDataChromiumOptions(t *testing.T) {
 
 func TestFormDataChromiumPdfOptions(t *testing.T) {
 	for _, tc := range []struct {
-		scenario        string
+		scenario              string
-		ctx             *api.ContextMock
+		ctx                   *api.ContextMock
-		expectedOptions PdfOptions
+		expectedOptions       PdfOptions
+		expectValidationError bool
 	}{
 		{
-			scenario:        "no custom form fields",
+			scenario:              "no custom form fields",
-			ctx:             &api.ContextMock{Context: new(api.Context)},
+			ctx:                   &api.ContextMock{Context: new(api.Context)},
-			expectedOptions: DefaultPdfOptions(),
+			expectedOptions:       DefaultPdfOptions(),
+			expectValidationError: false,
 		},
 		{
 			scenario: "custom form fields (Options & PdfOptions)",
@@ -220,29 +366,42 @@ func TestFormDataChromiumPdfOptions(t *testing.T) {
 				options.EmulatedMediaType = "screen"
 				return options
 			}(),
+			expectValidationError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			tc.ctx.SetLogger(zap.NewNop())
-			_, actual := FormDataChromiumPdfOptions(tc.ctx.Context)
+			form, actual := FormDataChromiumPdfOptions(tc.ctx.Context)
 
 			if !reflect.DeepEqual(actual, tc.expectedOptions) {
 				t.Fatalf("expected %+v but got: %+v", tc.expectedOptions, actual)
 			}
+
+			err := form.Validate()
+
+			if tc.expectValidationError && err == nil {
+				t.Fatal("expected validation error but got none", err)
+			}
+
+			if !tc.expectValidationError && err != nil {
+				t.Fatalf("expected no validation error but got: %v", err)
+			}
 		})
 	}
 }
 
 func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 	for _, tc := range []struct {
-		scenario        string
+		scenario              string
-		ctx             *api.ContextMock
+		ctx                   *api.ContextMock
-		expectedOptions ScreenshotOptions
+		expectedOptions       ScreenshotOptions
+		expectValidationError bool
 	}{
 		{
-			scenario:        "no custom form fields",
+			scenario:              "no custom form fields",
-			ctx:             &api.ContextMock{Context: new(api.Context)},
+			ctx:                   &api.ContextMock{Context: new(api.Context)},
-			expectedOptions: DefaultScreenshotOptions(),
+			expectedOptions:       DefaultScreenshotOptions(),
+			expectValidationError: false,
 		},
 		{
 			scenario: "invalid format form field",
@@ -260,6 +419,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Format = ""
 				return options
 			}(),
+			expectValidationError: true,
 		},
 		{
 			scenario: "valid png format form field",
@@ -277,6 +437,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Format = "png"
 				return options
 			}(),
+			expectValidationError: false,
 		},
 		{
 			scenario: "valid jpeg format form field",
@@ -294,6 +455,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Format = "jpeg"
 				return options
 			}(),
+			expectValidationError: false,
 		},
 		{
 			scenario: "valid webp format form field",
@@ -311,6 +473,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Format = "webp"
 				return options
 			}(),
+			expectValidationError: false,
 		},
 		{
 			scenario: "invalid quality form field (not an integer)",
@@ -328,6 +491,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Quality = 0
 				return options
 			}(),
+			expectValidationError: true,
 		},
 		{
 			scenario: "invalid quality form field (< 0)",
@@ -345,6 +509,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Quality = 0
 				return options
 			}(),
+			expectValidationError: true,
 		},
 		{
 			scenario: "invalid quality form field (> 100)",
@@ -362,6 +527,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Quality = 0
 				return options
 			}(),
+			expectValidationError: true,
 		},
 		{
 			scenario: "valid quality form field",
@@ -379,6 +545,7 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.Quality = 50
 				return options
 			}(),
+			expectValidationError: false,
 		},
 		{
 			scenario: "custom form fields (Options & ScreenshotOptions)",
@@ -412,29 +579,42 @@ func TestFormDataChromiumScreenshotOptions(t *testing.T) {
 				options.EmulatedMediaType = "screen"
 				return options
 			}(),
+			expectValidationError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			tc.ctx.SetLogger(zap.NewNop())
-			_, actual := FormDataChromiumScreenshotOptions(tc.ctx.Context)
+			form, actual := FormDataChromiumScreenshotOptions(tc.ctx.Context)
 
 			if !reflect.DeepEqual(actual, tc.expectedOptions) {
 				t.Fatalf("expected %+v but got: %+v", tc.expectedOptions, actual)
 			}
+
+			err := form.Validate()
+
+			if tc.expectValidationError && err == nil {
+				t.Fatal("expected validation error but got none", err)
+			}
+
+			if !tc.expectValidationError && err != nil {
+				t.Fatalf("expected no validation error but got: %v", err)
+			}
 		})
 	}
 }
 
 func TestFormDataChromiumPdfFormats(t *testing.T) {
 	for _, tc := range []struct {
-		scenario           string
+		scenario              string
-		ctx                *api.ContextMock
+		ctx                   *api.ContextMock
-		expectedPdfFormats gotenberg.PdfFormats
+		expectedPdfFormats    gotenberg.PdfFormats
+		expectValidationError bool
 	}{
 		{
-			scenario:           "no custom form fields",
+			scenario:              "no custom form fields",
-			ctx:                &api.ContextMock{Context: new(api.Context)},
+			ctx:                   &api.ContextMock{Context: new(api.Context)},
-			expectedPdfFormats: gotenberg.PdfFormats{},
+			expectedPdfFormats:    gotenberg.PdfFormats{},
+			expectValidationError: false,
 		},
 		{
 			scenario: "pdfa and pdfua form fields",
@@ -450,30 +630,44 @@ func TestFormDataChromiumPdfFormats(t *testing.T) {
 				})
 				return ctx
 			}(),
-			expectedPdfFormats: gotenberg.PdfFormats{PdfA: "foo", PdfUa: true},
+			expectedPdfFormats:    gotenberg.PdfFormats{PdfA: "foo", PdfUa: true},
+			expectValidationError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			tc.ctx.SetLogger(zap.NewNop())
-			actual := FormDataChromiumPdfFormats(tc.ctx.Context.FormData())
+			form := tc.ctx.Context.FormData()
+			actual := FormDataChromiumPdfFormats(form)
 
 			if !reflect.DeepEqual(actual, tc.expectedPdfFormats) {
 				t.Fatalf("expected %+v but got: %+v", tc.expectedPdfFormats, actual)
 			}
+
+			err := form.Validate()
+
+			if tc.expectValidationError && err == nil {
+				t.Fatal("expected validation error but got none", err)
+			}
+
+			if !tc.expectValidationError && err != nil {
+				t.Fatalf("expected no validation error but got: %v", err)
+			}
 		})
 	}
 }
 
 func TestFormDataPdfMetadata(t *testing.T) {
 	for _, tc := range []struct {
-		scenario         string
+		scenario              string
-		ctx              *api.ContextMock
+		ctx                   *api.ContextMock
-		expectedMetadata map[string]interface{}
+		expectedMetadata      map[string]interface{}
+		expectValidationError bool
 	}{
 		{
-			scenario:         "no metadata form field",
+			scenario:              "no metadata form field",
-			ctx:              &api.ContextMock{Context: new(api.Context)},
+			ctx:                   &api.ContextMock{Context: new(api.Context)},
-			expectedMetadata: nil,
+			expectedMetadata:      nil,
+			expectValidationError: false,
 		},
 		{
 			scenario: "invalid metadata form field",
@@ -486,7 +680,8 @@ func TestFormDataPdfMetadata(t *testing.T) {
 				})
 				return ctx
 			}(),
-			expectedMetadata: nil,
+			expectedMetadata:      nil,
+			expectValidationError: true,
 		},
 		{
 			scenario: "valid metadata form field",
@@ -502,15 +697,27 @@ func TestFormDataPdfMetadata(t *testing.T) {
 			expectedMetadata: map[string]interface{}{
 				"foo": "bar",
 			},
+			expectValidationError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			tc.ctx.SetLogger(zap.NewNop())
-			actual := FormDataPdfMetadata(tc.ctx.Context.FormData())
+			form := tc.ctx.Context.FormData()
+			actual := FormDataPdfMetadata(form)
 
 			if !reflect.DeepEqual(actual, tc.expectedMetadata) {
 				t.Fatalf("expected %+v but got: %+v", tc.expectedMetadata, actual)
 			}
+
+			err := form.Validate()
+
+			if tc.expectValidationError && err == nil {
+				t.Fatal("expected validation error but got none", err)
+			}
+
+			if !tc.expectValidationError && err != nil {
+				t.Fatalf("expected no validation error but got: %v", err)
+			}
 		})
 	}
 }
@@ -1423,6 +1630,18 @@ func TestConvertUrl(t *testing.T) {
 			expectHttpStatus:       http.StatusConflict,
 			expectOutputPathsCount: 0,
 		},
+		{
+			scenario: "ErrInvalidResourceHttpStatusCode",
+			ctx:      &api.ContextMock{Context: new(api.Context)},
+			api: &ApiMock{PdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
+				return ErrInvalidResourceHttpStatusCode
+			}},
+			options:                DefaultPdfOptions(),
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusConflict,
+			expectOutputPathsCount: 0,
+		},
 		{
 			scenario: "ErrConsoleExceptions",
 			ctx:      &api.ContextMock{Context: new(api.Context)},
@@ -1447,6 +1666,18 @@ func TestConvertUrl(t *testing.T) {
 			expectHttpStatus:       http.StatusBadRequest,
 			expectOutputPathsCount: 0,
 		},
+		{
+			scenario: "ErrResourceLoadingFailed",
+			ctx:      &api.ContextMock{Context: new(api.Context)},
+			api: &ApiMock{PdfMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options PdfOptions) error {
+				return ErrResourceLoadingFailed
+			}},
+			options:                DefaultPdfOptions(),
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusConflict,
+			expectOutputPathsCount: 0,
+		},
 		{
 			scenario: "error from Chromium",
 			ctx:      &api.ContextMock{Context: new(api.Context)},
@@ -1633,6 +1864,18 @@ func TestScreenshotUrl(t *testing.T) {
 			expectHttpStatus:       http.StatusConflict,
 			expectOutputPathsCount: 0,
 		},
+		{
+			scenario: "ErrInvalidResourceHttpStatusCode",
+			ctx:      &api.ContextMock{Context: new(api.Context)},
+			api: &ApiMock{ScreenshotMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+				return ErrInvalidResourceHttpStatusCode
+			}},
+			options:                DefaultScreenshotOptions(),
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusConflict,
+			expectOutputPathsCount: 0,
+		},
 		{
 			scenario: "ErrConsoleExceptions",
 			ctx:      &api.ContextMock{Context: new(api.Context)},
@@ -1657,6 +1900,18 @@ func TestScreenshotUrl(t *testing.T) {
 			expectHttpStatus:       http.StatusBadRequest,
 			expectOutputPathsCount: 0,
 		},
+		{
+			scenario: "ErrResourceLoadingFailed",
+			ctx:      &api.ContextMock{Context: new(api.Context)},
+			api: &ApiMock{ScreenshotMock: func(ctx context.Context, logger *zap.Logger, url, outputPath string, options ScreenshotOptions) error {
+				return ErrResourceLoadingFailed
+			}},
+			options:                DefaultScreenshotOptions(),
+			expectError:            true,
+			expectHttpError:        true,
+			expectHttpStatus:       http.StatusConflict,
+			expectOutputPathsCount: 0,
+		},
 		{
 			scenario: "error from Chromium",
 			ctx:      &api.ContextMock{Context: new(api.Context)},

pkg/modules/chromium/tasks.go

@@ -48,6 +48,7 @@ func printToPdfActionFunc(logger *zap.Logger, outputPath string, options PdfOpti
 			WithMarginRight(options.MarginRight).
 			WithPageRanges(pageRanges).
 			WithPreferCSSPageSize(options.PreferCssPageSize).
+			WithGenerateDocumentOutline(options.GenerateDocumentOutline).
 			// Does not seem to work.
 			// See https://github.com/gotenberg/gotenberg/issues/831.
 			WithGenerateTaggedPDF(false)
@@ -298,28 +299,33 @@ func userAgentOverride(logger *zap.Logger, userAgent string) chromedp.ActionFunc
 	}
 }
 
-func extraHttpHeadersActionFunc(logger *zap.Logger, extraHttpHeaders map[string]string) chromedp.ActionFunc {
+// This code has been replaced with the listenForEventRequestPaused function.
-	return func(ctx context.Context) error {
+// Indeed, the user may want to scope the headers per domain, but using
-		if len(extraHttpHeaders) == 0 {
+// network.SetExtraHTTPHeaders set the headers for ALL requests from the page.
-			logger.Debug("no extra HTTP headers")
+// See https://github.com/gotenberg/gotenberg/issues/1011.
-			return nil
+//
-		}
+//func extraHttpHeadersActionFunc(logger *zap.Logger, extraHttpHeaders map[string]string) chromedp.ActionFunc {
-
+//	return func(ctx context.Context) error {
-		logger.Debug(fmt.Sprintf("extra HTTP headers: %+v", extraHttpHeaders))
+//		if len(extraHttpHeaders) == 0 {
-
+//			logger.Debug("no extra HTTP headers")
-		headers := make(network.Headers, len(extraHttpHeaders))
+//			return nil
-		for key, value := range extraHttpHeaders {
+//		}
-			headers[key] = value
+//
-		}
+//		logger.Debug(fmt.Sprintf("extra HTTP headers: %+v", extraHttpHeaders))
-
+//
-		err := network.SetExtraHTTPHeaders(headers).Do(ctx)
+//		headers := make(network.Headers, len(extraHttpHeaders))
-		if err == nil {
+//		for key, value := range extraHttpHeaders {
-			return nil
+//			headers[key] = value
-		}
+//		}
-
+//
-		return fmt.Errorf("set extra HTTP headers: %w", err)
+//		err := network.SetExtraHTTPHeaders(headers).Do(ctx)
-	}
+//		if err == nil {
-}
+//			return nil
+//		}
+//
+//		return fmt.Errorf("set extra HTTP headers: %w", err)
+//	}
+//}
 
 func navigateActionFunc(logger *zap.Logger, url string, skipNetworkIdleEvent bool) chromedp.ActionFunc {
 	return func(ctx context.Context) error {

pkg/modules/libreoffice/routes.go

@@ -191,14 +191,14 @@ func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) ap
 					if errors.Is(err, libreofficeapi.ErrUnoException) {
 						return api.WrapError(
 							fmt.Errorf("convert to PDF: %w", err),
-							api.NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("LibreOffice failed to process the document: possible causes include malformed page ranges '%s' (nativePageRanges) or the document might not be password-protected, but the exact cause is uncertain", options.PageRanges)),
+							api.NewSentinelHttpError(http.StatusBadRequest, fmt.Sprintf("LibreOffice failed to process a document: possible causes include malformed page ranges '%s' (nativePageRanges), or, if a password has been provided, it may not be required. In any case, the exact cause is uncertain.", options.PageRanges)),
 						)
 					}
 
 					if errors.Is(err, libreofficeapi.ErrRuntimeException) {
 						return api.WrapError(
 							fmt.Errorf("convert to PDF: %w", err),
-							api.NewSentinelHttpError(http.StatusBadRequest, "LibreOffice failed to process a document: a password may be invalid or required, but the exact cause is uncertain"),
+							api.NewSentinelHttpError(http.StatusBadRequest, "LibreOffice failed to process a document: a password may be required, or, if one has been given, it is invalid. In any case, the exact cause is uncertain."),
 						)
 					}
 

pkg/modules/pdfcpu/doc.go

@@ -1,5 +1,5 @@
 // Package pdfcpu provides an implementation of the gotenberg.PdfEngine
-// interface using the pdfcpu library. This package allows for:
+// interface using the pdfcpu command-line tool. This package allows for:
 //
 // 1. The merging of PDF files.
 //

pkg/modules/pdfcpu/pdfcpu.go

@@ -2,11 +2,10 @@ package pdfcpu
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"os"
 
-	pdfcpuAPI "github.com/pdfcpu/pdfcpu/pkg/api"
-	pdfcpuLog "github.com/pdfcpu/pdfcpu/pkg/log"
-	pdfcpuConfig "github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model"
 	"go.uber.org/zap"
 
 	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
@@ -16,10 +15,10 @@ func init() {
 	gotenberg.MustRegisterModule(new(PdfCpu))
 }
 
-// PdfCpu abstracts the pdfcpu library and implements the [gotenberg.PdfEngine]
+// PdfCpu abstracts the CLI tool pdfcpu and implements the
-// interface.
+// [gotenberg.PdfEngine] interface.
 type PdfCpu struct {
-	conf *pdfcpuConfig.Configuration
+	binPath string
 }
 
 // Descriptor returns a [PdfCpu]'s module descriptor.
@@ -32,16 +31,38 @@ func (engine *PdfCpu) Descriptor() gotenberg.ModuleDescriptor {
 
 // Provision sets the engine properties.
 func (engine *PdfCpu) Provision(ctx *gotenberg.Context) error {
-	pdfcpuConfig.ConfigPath = "disable"
+	binPath, ok := os.LookupEnv("PDFCPU_BIN_PATH")
-	pdfcpuLog.DisableLoggers()
+	if !ok {
-	engine.conf = pdfcpuConfig.NewDefaultConfiguration()
+		return errors.New("PDFCPU_BIN_PATH environment variable is not set")
+	}
+
+	engine.binPath = binPath
+
+	return nil
+}
+
+// Validate validates the module properties.
+func (engine *PdfCpu) Validate() error {
+	_, err := os.Stat(engine.binPath)
+	if os.IsNotExist(err) {
+		return fmt.Errorf("pdfcpu binary path does not exist: %w", err)
+	}
 
 	return nil
 }
 
 // Merge combines multiple PDFs into a single PDF.
 func (engine *PdfCpu) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-	err := pdfcpuAPI.MergeCreateFile(inputPaths, outputPath, false, engine.conf)
+	var args []string
+	args = append(args, "merge", outputPath)
+	args = append(args, inputPaths...)
+
+	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
+	if err != nil {
+		return fmt.Errorf("create command: %w", err)
+	}
+
+	_, err = cmd.Exec()
 	if err == nil {
 		return nil
 	}
@@ -68,5 +89,6 @@ func (engine *PdfCpu) WriteMetadata(ctx context.Context, logger *zap.Logger, met
 var (
 	_ gotenberg.Module      = (*PdfCpu)(nil)
 	_ gotenberg.Provisioner = (*PdfCpu)(nil)
+	_ gotenberg.Validator   = (*PdfCpu)(nil)
 	_ gotenberg.PdfEngine   = (*PdfCpu)(nil)
 )

pkg/modules/pdfcpu/pdfcpu_test.go

@@ -33,14 +33,59 @@ func TestPdfCpu_Provision(t *testing.T) {
 	}
 }
 
+func TestPdfCpu_Validate(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		binPath     string
+		expectError bool
+	}{
+		{
+			scenario:    "empty bin path",
+			binPath:     "",
+			expectError: true,
+		},
+		{
+			scenario:    "bin path does not exist",
+			binPath:     "/foo",
+			expectError: true,
+		},
+		{
+			scenario:    "validate success",
+			binPath:     os.Getenv("PDFTK_BIN_PATH"),
+			expectError: false,
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			engine := new(PdfCpu)
+			engine.binPath = tc.binPath
+			err := engine.Validate()
+
+			if !tc.expectError && err != nil {
+				t.Fatalf("expected no error but got: %v", err)
+			}
+
+			if tc.expectError && err == nil {
+				t.Fatal("expected error but got none")
+			}
+		})
+	}
+}
+
 func TestPdfCpu_Merge(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
+		ctx         context.Context
 		inputPaths  []string
 		expectError bool
 	}{
+		{
+			scenario:    "invalid context",
+			ctx:         nil,
+			expectError: true,
+		},
 		{
 			scenario: "invalid input path",
+			ctx:      context.TODO(),
 			inputPaths: []string{
 				"foo",
 			},
@@ -48,6 +93,7 @@ func TestPdfCpu_Merge(t *testing.T) {
 		},
 		{
 			scenario: "single file success",
+			ctx:      context.TODO(),
 			inputPaths: []string{
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 			},
@@ -55,10 +101,12 @@ func TestPdfCpu_Merge(t *testing.T) {
 		},
 		{
 			scenario: "many files success",
+			ctx:      context.TODO(),
 			inputPaths: []string{
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 				"/tests/test/testdata/pdfengines/sample2.pdf",
 			},
+			expectError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
@@ -81,7 +129,7 @@ func TestPdfCpu_Merge(t *testing.T) {
 				}
 			}()
 
-			err = engine.Merge(nil, nil, tc.inputPaths, outputDir+"/foo.pdf")
+			err = engine.Merge(tc.ctx, zap.NewNop(), tc.inputPaths, outputDir+"/foo.pdf")
 
 			if !tc.expectError && err != nil {
 				t.Fatalf("expected no error but got: %v", err)

pkg/modules/pdfengines/multi.go

@@ -12,12 +12,23 @@ import (
 )
 
 type multiPdfEngines struct {
-	engines []gotenberg.PdfEngine
+	mergeEngines       []gotenberg.PdfEngine
+	convertEngines     []gotenberg.PdfEngine
+	readMedataEngines  []gotenberg.PdfEngine
+	writeMedataEngines []gotenberg.PdfEngine
 }
 
-func newMultiPdfEngines(engines ...gotenberg.PdfEngine) *multiPdfEngines {
+func newMultiPdfEngines(
+	mergeEngines,
+	convertEngines,
+	readMetadataEngines,
+	writeMedataEngines []gotenberg.PdfEngine,
+) *multiPdfEngines {
 	return &multiPdfEngines{
-		engines: engines,
+		mergeEngines:       mergeEngines,
+		convertEngines:     convertEngines,
+		readMedataEngines:  readMetadataEngines,
+		writeMedataEngines: writeMedataEngines,
 	}
 }
 
@@ -27,7 +38,7 @@ func (multi *multiPdfEngines) Merge(ctx context.Context, logger *zap.Logger, inp
 	var err error
 	errChan := make(chan error, 1)
 
-	for _, engine := range multi.engines {
+	for _, engine := range multi.mergeEngines {
 		go func(engine gotenberg.PdfEngine) {
 			errChan <- engine.Merge(ctx, logger, inputPaths, outputPath)
 		}(engine)
@@ -52,7 +63,7 @@ func (multi *multiPdfEngines) Convert(ctx context.Context, logger *zap.Logger, f
 	var err error
 	errChan := make(chan error, 1)
 
-	for _, engine := range multi.engines {
+	for _, engine := range multi.convertEngines {
 		go func(engine gotenberg.PdfEngine) {
 			errChan <- engine.Convert(ctx, logger, formats, inputPath, outputPath)
 		}(engine)
@@ -80,16 +91,16 @@ func (multi *multiPdfEngines) ReadMetadata(ctx context.Context, logger *zap.Logg
 	var err error
 	var mu sync.Mutex // to safely append errors.
 
-	resultChan := make(chan readMetadataResult, len(multi.engines))
+	resultChan := make(chan readMetadataResult, len(multi.readMedataEngines))
 
-	for _, engine := range multi.engines {
+	for _, engine := range multi.readMedataEngines {
 		go func(engine gotenberg.PdfEngine) {
 			metadata, err := engine.ReadMetadata(ctx, logger, inputPath)
 			resultChan <- readMetadataResult{metadata: metadata, err: err}
 		}(engine)
 	}
 
-	for range multi.engines {
+	for range multi.readMedataEngines {
 		select {
 		case result := <-resultChan:
 			if result.err != nil {
@@ -111,7 +122,7 @@ func (multi *multiPdfEngines) WriteMetadata(ctx context.Context, logger *zap.Log
 	var err error
 	errChan := make(chan error, 1)
 
-	for _, engine := range multi.engines {
+	for _, engine := range multi.writeMedataEngines {
 		go func(engine gotenberg.PdfEngine) {
 			errChan <- engine.WriteMetadata(ctx, logger, metadata, inputPath)
 		}(engine)

pkg/modules/pdfengines/multi_test.go

@@ -20,11 +20,16 @@ func TestMultiPdfEngines_Merge(t *testing.T) {
 		{
 			scenario: "nominal behavior",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				[]gotenberg.PdfEngine{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					&gotenberg.PdfEngineMock{
-						return nil
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return nil
+						},
 					},
 				},
+				nil,
+				nil,
+				nil,
 			),
 			ctx:         context.Background(),
 			expectError: false,
@@ -32,16 +37,21 @@ func TestMultiPdfEngines_Merge(t *testing.T) {
 		{
 			scenario: "at least one engine does not return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				[]gotenberg.PdfEngine{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					&gotenberg.PdfEngineMock{
-						return errors.New("foo")
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					},
+							return errors.New("foo")
-				},
+						},
-				&gotenberg.PdfEngineMock{
+					},
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					&gotenberg.PdfEngineMock{
-						return nil
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return nil
+						},
 					},
 				},
+				nil,
+				nil,
+				nil,
 			),
 			ctx:         context.Background(),
 			expectError: false,
@@ -49,16 +59,21 @@ func TestMultiPdfEngines_Merge(t *testing.T) {
 		{
 			scenario: "all engines return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				[]gotenberg.PdfEngine{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					&gotenberg.PdfEngineMock{
-						return errors.New("foo")
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
-					},
+							return errors.New("foo")
-				},
+						},
-				&gotenberg.PdfEngineMock{
+					},
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					&gotenberg.PdfEngineMock{
-						return errors.New("foo")
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return errors.New("foo")
+						},
 					},
 				},
+				nil,
+				nil,
+				nil,
 			),
 			ctx:         context.Background(),
 			expectError: true,
@@ -66,11 +81,16 @@ func TestMultiPdfEngines_Merge(t *testing.T) {
 		{
 			scenario: "context expired",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				[]gotenberg.PdfEngine{
-					MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+					&gotenberg.PdfEngineMock{
-						return nil
+						MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
+							return nil
+						},
 					},
 				},
+				nil,
+				nil,
+				nil,
 			),
 			ctx: func() context.Context {
 				ctx, cancel := context.WithCancel(context.Background())
@@ -105,43 +125,58 @@ func TestMultiPdfEngines_Convert(t *testing.T) {
 		{
 			scenario: "nominal behavior",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+				[]gotenberg.PdfEngine{
-						return nil
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return nil
+						},
 					},
 				},
+				nil,
+				nil,
 			),
 			ctx: context.Background(),
 		},
 		{
 			scenario: "at least one engine does not return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+				[]gotenberg.PdfEngine{
-						return errors.New("foo")
+					&gotenberg.PdfEngineMock{
-					},
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-				},
+							return errors.New("foo")
-				&gotenberg.PdfEngineMock{
+						},
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+					},
-						return nil
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return nil
+						},
 					},
 				},
+				nil,
+				nil,
 			),
 			ctx: context.Background(),
 		},
 		{
 			scenario: "all engines return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+				[]gotenberg.PdfEngine{
-						return errors.New("foo")
+					&gotenberg.PdfEngineMock{
-					},
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
-				},
+							return errors.New("foo")
-				&gotenberg.PdfEngineMock{
+						},
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+					},
-						return errors.New("foo")
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return errors.New("foo")
+						},
 					},
 				},
+				nil,
+				nil,
 			),
 			ctx:         context.Background(),
 			expectError: true,
@@ -149,11 +184,16 @@ func TestMultiPdfEngines_Convert(t *testing.T) {
 		{
 			scenario: "context expired",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+				[]gotenberg.PdfEngine{
-						return nil
+					&gotenberg.PdfEngineMock{
+						ConvertMock: func(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
+							return nil
+						},
 					},
 				},
+				nil,
+				nil,
 			),
 			ctx: func() context.Context {
 				ctx, cancel := context.WithCancel(context.Background())
@@ -188,43 +228,58 @@ func TestMultiPdfEngines_ReadMetadata(t *testing.T) {
 		{
 			scenario: "nominal behavior",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+				nil,
-						return make(map[string]interface{}), nil
+				[]gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return make(map[string]interface{}), nil
+						},
 					},
 				},
+				nil,
 			),
 			ctx: context.Background(),
 		},
 		{
 			scenario: "at least one engine does not return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+				nil,
-						return nil, errors.New("foo")
+				[]gotenberg.PdfEngine{
-					},
+					&gotenberg.PdfEngineMock{
-				},
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
-				&gotenberg.PdfEngineMock{
+							return nil, errors.New("foo")
-					ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+						},
-						return make(map[string]interface{}), nil
+					},
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return make(map[string]interface{}), nil
+						},
 					},
 				},
+				nil,
 			),
 			ctx: context.Background(),
 		},
 		{
 			scenario: "all engines return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+				nil,
-						return nil, errors.New("foo")
+				[]gotenberg.PdfEngine{
-					},
+					&gotenberg.PdfEngineMock{
-				},
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
-				&gotenberg.PdfEngineMock{
+							return nil, errors.New("foo")
-					ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+						},
-						return nil, errors.New("foo")
+					},
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return nil, errors.New("foo")
+						},
 					},
 				},
+				nil,
 			),
 			ctx:         context.Background(),
 			expectError: true,
@@ -232,11 +287,16 @@ func TestMultiPdfEngines_ReadMetadata(t *testing.T) {
 		{
 			scenario: "context expired",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+				nil,
-						return make(map[string]interface{}), nil
+				[]gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						ReadMetadataMock: func(ctx context.Context, logger *zap.Logger, inputPath string) (map[string]interface{}, error) {
+							return make(map[string]interface{}), nil
+						},
 					},
 				},
+				nil,
 			),
 			ctx: func() context.Context {
 				ctx, cancel := context.WithCancel(context.Background())
@@ -271,9 +331,14 @@ func TestMultiPdfEngines_WriteMetadata(t *testing.T) {
 		{
 			scenario: "nominal behavior",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+				nil,
-						return nil
+				nil,
+				[]gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return nil
+						},
 					},
 				},
 			),
@@ -282,14 +347,19 @@ func TestMultiPdfEngines_WriteMetadata(t *testing.T) {
 		{
 			scenario: "at least one engine does not return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+				nil,
-						return errors.New("foo")
+				nil,
+				[]gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return errors.New("foo")
+						},
 					},
-				},
+					&gotenberg.PdfEngineMock{
-				&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
-					WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return nil
-						return nil
+						},
 					},
 				},
 			),
@@ -298,14 +368,19 @@ func TestMultiPdfEngines_WriteMetadata(t *testing.T) {
 		{
 			scenario: "all engines return an error",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+				nil,
-						return errors.New("foo")
+				nil,
+				[]gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return errors.New("foo")
+						},
 					},
-				},
+					&gotenberg.PdfEngineMock{
-				&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
-					WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return errors.New("foo")
-						return errors.New("foo")
+						},
 					},
 				},
 			),
@@ -315,9 +390,14 @@ func TestMultiPdfEngines_WriteMetadata(t *testing.T) {
 		{
 			scenario: "context expired",
 			engine: newMultiPdfEngines(
-				&gotenberg.PdfEngineMock{
+				nil,
-					WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+				nil,
-						return nil
+				nil,
+				[]gotenberg.PdfEngine{
+					&gotenberg.PdfEngineMock{
+						WriteMetadataMock: func(ctx context.Context, logger *zap.Logger, metadata map[string]interface{}, inputPath string) error {
+							return nil
+						},
 					},
 				},
 			),

pkg/modules/pdfengines/pdfengines.go

@@ -27,9 +27,12 @@ func init() {
 // the [api.Router] interface to expose relevant PDF processing routes if
 // enabled.
 type PdfEngines struct {
-	names         []string
+	mergeNames        []string
-	engines       []gotenberg.PdfEngine
+	convertNames      []string
-	disableRoutes bool
+	readMetadataNames []string
+	writeMedataNames  []string
+	engines           []gotenberg.PdfEngine
+	disableRoutes     bool
 }
 
 // Descriptor returns a PdfEngines' module descriptor.
@@ -38,9 +41,18 @@ func (mod *PdfEngines) Descriptor() gotenberg.ModuleDescriptor {
 		ID: "pdfengines",
 		FlagSet: func() *flag.FlagSet {
 			fs := flag.NewFlagSet("pdfengines", flag.ExitOnError)
-			fs.StringSlice("pdfengines-engines", make([]string, 0), "Set the PDF engines and their order - all by default")
+			fs.StringSlice("pdfengines-merge-engines", []string{"qpdf", "pdfcpu", "pdftk"}, "Set the PDF engines and their order for the merge feature - empty means all")
+			fs.StringSlice("pdfengines-convert-engines", []string{"libreoffice-pdfengine"}, "Set the PDF engines and their order for the convert feature - empty means all")
+			fs.StringSlice("pdfengines-read-metadata-engines", []string{"exiftool"}, "Set the PDF engines and their order for the read metadata feature - empty means all")
+			fs.StringSlice("pdfengines-write-metadata-engines", []string{"exiftool"}, "Set the PDF engines and their order for the write metadata feature - empty means all")
 			fs.Bool("pdfengines-disable-routes", false, "Disable the routes")
 
+			fs.StringSlice("pdfengines-engines", make([]string, 0), "Set the default PDF engines and their default order - all by default")
+			err := fs.MarkDeprecated("pdfengines-engines", "use other flags for a more granular selection of PDF engines per method")
+			if err != nil {
+				panic(err)
+			}
+
 			return fs
 		}(),
 		New: func() gotenberg.Module { return new(PdfEngines) },
@@ -51,7 +63,10 @@ func (mod *PdfEngines) Descriptor() gotenberg.ModuleDescriptor {
 // selected by the user thanks to the "engines" flag.
 func (mod *PdfEngines) Provision(ctx *gotenberg.Context) error {
 	flags := ctx.ParsedFlags()
-	names := flags.MustStringSlice("pdfengines-engines")
+	mergeNames := flags.MustStringSlice("pdfengines-merge-engines")
+	convertNames := flags.MustStringSlice("pdfengines-convert-engines")
+	readMetadataNames := flags.MustStringSlice("pdfengines-read-metadata-engines")
+	writeMetadataNames := flags.MustStringSlice("pdfengines-write-metadata-engines")
 	mod.disableRoutes = flags.MustBool("pdfengines-disable-routes")
 
 	engines, err := ctx.Modules(new(gotenberg.PdfEngine))
@@ -65,26 +80,37 @@ func (mod *PdfEngines) Provision(ctx *gotenberg.Context) error {
 		mod.engines[i] = engine.(gotenberg.PdfEngine)
 	}
 
-	if len(names) > 0 {
+	defaultNames := make([]string, len(mod.engines))
-		// Selection from user.
+	for i, engine := range mod.engines {
-		mod.names = names
+		defaultNames[i] = engine.(gotenberg.Module).Descriptor().ID
-
-		// Example in case of deprecated module name.
-		//for i, name := range names {
-		//	if name == "unoconv-pdfengine" || name == "uno-pdfengine" {
-		//		logger.Warn(fmt.Sprintf("%s is deprecated; prefer libreoffice-pdfengine instead", name))
-		//		mod.names[i] = "libreoffice-pdfengine"
-		//	}
-		//}
-
-		return nil
 	}
 
-	// No selection from user, use all PDF engines available.
+	// Example in case of deprecated module name.
-	mod.names = make([]string, len(mod.engines))
+	//for i, name := range defaultNames {
+	//	if name == "unoconv-pdfengine" || name == "uno-pdfengine" {
+	//		logger.Warn(fmt.Sprintf("%s is deprecated; prefer libreoffice-pdfengine instead", name))
+	//		mod.defaultNames[i] = "libreoffice-pdfengine"
+	//	}
+	//}
 
-	for i, engine := range mod.engines {
+	mod.mergeNames = defaultNames
-		mod.names[i] = engine.(gotenberg.Module).Descriptor().ID
+	if len(mergeNames) > 0 {
+		mod.mergeNames = mergeNames
+	}
+
+	mod.convertNames = defaultNames
+	if len(convertNames) > 0 {
+		mod.convertNames = convertNames
+	}
+
+	mod.readMetadataNames = defaultNames
+	if len(readMetadataNames) > 0 {
+		mod.readMetadataNames = readMetadataNames
+	}
+
+	mod.writeMedataNames = defaultNames
+	if len(writeMetadataNames) > 0 {
+		mod.writeMedataNames = writeMetadataNames
 	}
 
 	return nil
@@ -105,22 +131,40 @@ func (mod *PdfEngines) Validate() error {
 	}
 
 	nonExistingEngines := make([]string, 0)
+	findNonExistingEngines := func(names []string) {
+		for _, name := range names {
+			engineExists := false
 
-	for _, name := range mod.names {
+			for _, engine := range mod.engines {
-		engineExists := false
+				if name == engine.(gotenberg.Module).Descriptor().ID {
+					engineExists = true
+					break
+				}
+			}
 
-		for _, engine := range mod.engines {
+			if engineExists {
-			if name == engine.(gotenberg.Module).Descriptor().ID {
+				continue
-				engineExists = true
+			}
-				break
+
+			alreadyInSlice := false
+			for _, engine := range nonExistingEngines {
+				if engine == name {
+					alreadyInSlice = true
+					break
+				}
+			}
+
+			if !alreadyInSlice {
+				nonExistingEngines = append(nonExistingEngines, name)
 			}
 		}
-
-		if !engineExists {
-			nonExistingEngines = append(nonExistingEngines, name)
-		}
 	}
 
+	findNonExistingEngines(mod.mergeNames)
+	findNonExistingEngines(mod.convertNames)
+	findNonExistingEngines(mod.readMetadataNames)
+	findNonExistingEngines(mod.writeMedataNames)
+
 	if len(nonExistingEngines) == 0 {
 		return nil
 	}
@@ -132,24 +176,35 @@ func (mod *PdfEngines) Validate() error {
 // modules.
 func (mod *PdfEngines) SystemMessages() []string {
 	return []string{
-		strings.Join(mod.names[:], " "),
+		fmt.Sprintf("merge engines - %s", strings.Join(mod.mergeNames[:], " ")),
+		fmt.Sprintf("convert engines - %s", strings.Join(mod.convertNames[:], " ")),
+		fmt.Sprintf("read metadata engines - %s", strings.Join(mod.readMetadataNames[:], " ")),
+		fmt.Sprintf("write medata engines - %s", strings.Join(mod.writeMedataNames[:], " ")),
 	}
 }
 
 // PdfEngine returns a [gotenberg.PdfEngine].
 func (mod *PdfEngines) PdfEngine() (gotenberg.PdfEngine, error) {
-	engines := make([]gotenberg.PdfEngine, len(mod.names))
+	engines := func(names []string) []gotenberg.PdfEngine {
-
+		list := make([]gotenberg.PdfEngine, len(names))
-	for i, name := range mod.names {
+		for i, name := range names {
-		for _, engine := range mod.engines {
+			for _, engine := range mod.engines {
-			if name == engine.(gotenberg.Module).Descriptor().ID {
+				if name == engine.(gotenberg.Module).Descriptor().ID {
-				engines[i] = engine
+					list[i] = engine
-				break
+					break
+				}
 			}
 		}
+
+		return list
 	}
 
-	return newMultiPdfEngines(engines...), nil
+	return newMultiPdfEngines(
+		engines(mod.mergeNames),
+		engines(mod.convertNames),
+		engines(mod.readMetadataNames),
+		engines(mod.writeMedataNames),
+	), nil
 }
 
 // Routes returns the HTTP routes.

pkg/modules/pdfengines/pdfengines_test.go

@@ -2,6 +2,7 @@ package pdfengines
 
 import (
 	"errors"
+	"fmt"
 	"reflect"
 	"strings"
 	"testing"
@@ -22,10 +23,13 @@ func TestPdfEngines_Descriptor(t *testing.T) {
 
 func TestPdfEngines_Provision(t *testing.T) {
 	for _, tc := range []struct {
-		scenario           string
+		scenario                        string
-		ctx                *gotenberg.Context
+		ctx                             *gotenberg.Context
-		expectedPdfEngines []string
+		expectedMergePdfEngines         []string
-		expectError        bool
+		expectedConvertPdfEngines       []string
+		expectedReadMetadataPdfEngines  []string
+		expectedWriteMetadataPdfEngines []string
+		expectError                     bool
 	}{
 		{
 			scenario: "no selection from user",
@@ -61,8 +65,11 @@ func TestPdfEngines_Provision(t *testing.T) {
 					},
 				)
 			}(),
-			expectedPdfEngines: []string{"bar"},
+			expectedMergePdfEngines:         []string{"qpdf", "pdfcpu", "pdftk"},
-			expectError:        false,
+			expectedConvertPdfEngines:       []string{"libreoffice-pdfengine"},
+			expectedReadMetadataPdfEngines:  []string{"exiftool"},
+			expectedWriteMetadataPdfEngines: []string{"exiftool"},
+			expectError:                     false,
 		},
 		{
 			scenario: "selection from user",
@@ -100,7 +107,7 @@ func TestPdfEngines_Provision(t *testing.T) {
 				}
 
 				fs := new(PdfEngines).Descriptor().FlagSet
-				err := fs.Parse([]string{"--pdfengines-engines=b", "--pdfengines-engines=a"})
+				err := fs.Parse([]string{"--pdfengines-merge-engines=b", "--pdfengines-convert-engines=b", "--pdfengines-read-metadata-engines=a", "--pdfengines-write-metadata-engines=a"})
 				if err != nil {
 					t.Fatalf("expected no error but got: %v", err)
 				}
@@ -116,8 +123,12 @@ func TestPdfEngines_Provision(t *testing.T) {
 					},
 				)
 			}(),
-			expectedPdfEngines: []string{"b", "a"},
+
-			expectError:        false,
+			expectedMergePdfEngines:         []string{"b"},
+			expectedConvertPdfEngines:       []string{"b"},
+			expectedReadMetadataPdfEngines:  []string{"a"},
+			expectedWriteMetadataPdfEngines: []string{"a"},
+			expectError:                     false,
 		},
 		{
 			scenario: "no valid PDF engine",
@@ -167,13 +178,43 @@ func TestPdfEngines_Provision(t *testing.T) {
 				t.Fatal("expected error but got none")
 			}
 
-			if len(tc.expectedPdfEngines) != len(mod.names) {
+			if len(tc.expectedMergePdfEngines) != len(mod.mergeNames) {
-				t.Fatalf("expected %d names but got %d", len(tc.expectedPdfEngines), len(mod.names))
+				t.Fatalf("expected %d merge names but got %d", len(tc.expectedMergePdfEngines), len(mod.mergeNames))
 			}
 
-			for index, name := range mod.names {
+			if len(tc.expectedConvertPdfEngines) != len(mod.convertNames) {
-				if name != tc.expectedPdfEngines[index] {
+				t.Fatalf("expected %d convert names but got %d", len(tc.expectedConvertPdfEngines), len(mod.convertNames))
-					t.Fatalf("expected scenario at index %d to be %s, but got: %s", index, name, tc.expectedPdfEngines[index])
+			}
+
+			if len(tc.expectedReadMetadataPdfEngines) != len(mod.readMetadataNames) {
+				t.Fatalf("expected %d read metadata names but got %d", len(tc.expectedReadMetadataPdfEngines), len(mod.readMetadataNames))
+			}
+
+			if len(tc.expectedWriteMetadataPdfEngines) != len(mod.writeMedataNames) {
+				t.Fatalf("expected %d write metadata names but got %d", len(tc.expectedWriteMetadataPdfEngines), len(mod.writeMedataNames))
+			}
+
+			for index, name := range mod.mergeNames {
+				if name != tc.expectedMergePdfEngines[index] {
+					t.Fatalf("expected merge name at index %d to be %s, but got: %s", index, name, tc.expectedMergePdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.convertNames {
+				if name != tc.expectedConvertPdfEngines[index] {
+					t.Fatalf("expected convert name at index %d to be %s, but got: %s", index, name, tc.expectedConvertPdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.readMetadataNames {
+				if name != tc.expectedReadMetadataPdfEngines[index] {
+					t.Fatalf("expected read metadata name at index %d to be %s, but got: %s", index, name, tc.expectedReadMetadataPdfEngines[index])
+				}
+			}
+
+			for index, name := range mod.writeMedataNames {
+				if name != tc.expectedWriteMetadataPdfEngines[index] {
+					t.Fatalf("expected write metadat name at index %d to be %s, but got: %s", index, name, tc.expectedWriteMetadataPdfEngines[index])
 				}
 			}
 		})
@@ -239,8 +280,11 @@ func TestPdfEngines_Validate(t *testing.T) {
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			mod := PdfEngines{
-				names:   tc.names,
+				mergeNames:        tc.names,
-				engines: tc.engines,
+				convertNames:      tc.names,
+				readMetadataNames: tc.names,
+				writeMedataNames:  tc.names,
+				engines:           tc.engines,
 			}
 
 			err := mod.Validate()
@@ -258,22 +302,36 @@ func TestPdfEngines_Validate(t *testing.T) {
 
 func TestPdfEngines_SystemMessages(t *testing.T) {
 	mod := new(PdfEngines)
-	mod.names = []string{"foo", "bar"}
+	mod.mergeNames = []string{"foo", "bar"}
+	mod.convertNames = []string{"foo", "bar"}
+	mod.readMetadataNames = []string{"foo", "bar"}
+	mod.writeMedataNames = []string{"foo", "bar"}
 
 	messages := mod.SystemMessages()
-	if len(messages) != 1 {
+	if len(messages) != 4 {
 		t.Errorf("expected one and only one message, but got %d", len(messages))
 	}
 
-	expect := strings.Join(mod.names[:], " ")
+	expect := []string{
-	if messages[0] != expect {
+		fmt.Sprintf("merge engines - %s", strings.Join(mod.mergeNames[:], " ")),
-		t.Errorf("expected message '%s', but got '%s'", expect, messages[0])
+		fmt.Sprintf("convert engines - %s", strings.Join(mod.convertNames[:], " ")),
+		fmt.Sprintf("read metadata engines - %s", strings.Join(mod.readMetadataNames[:], " ")),
+		fmt.Sprintf("write medata engines - %s", strings.Join(mod.writeMedataNames[:], " ")),
+	}
+
+	for i, message := range messages {
+		if message != expect[i] {
+			t.Errorf("expected message at index %d to be %s, but got %s", i, message, expect[i])
+		}
 	}
 }
 
 func TestPdfEngines_PdfEngine(t *testing.T) {
 	mod := PdfEngines{
-		names: []string{"foo", "bar"},
+		mergeNames:        []string{"foo", "bar"},
+		convertNames:      []string{"foo", "bar"},
+		readMetadataNames: []string{"foo", "bar"},
+		writeMedataNames:  []string{"foo", "bar"},
 		engines: func() []gotenberg.PdfEngine {
 			engine1 := &struct {
 				gotenberg.ModuleMock

pkg/modules/pdftk/pdftk.go

@@ -45,7 +45,7 @@ func (engine *PdfTk) Provision(ctx *gotenberg.Context) error {
 func (engine *PdfTk) Validate() error {
 	_, err := os.Stat(engine.binPath)
 	if os.IsNotExist(err) {
-		return fmt.Errorf("PdfTk binary path does not exist: %w", err)
+		return fmt.Errorf("PDFtk binary path does not exist: %w", err)
 	}
 
 	return nil

pkg/modules/pdftk/pdftk_test.go

@@ -97,6 +97,7 @@ func TestPdfTk_Merge(t *testing.T) {
 			inputPaths: []string{
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 			},
+			expectError: false,
 		},
 		{
 			scenario: "many files success",
@@ -105,6 +106,7 @@ func TestPdfTk_Merge(t *testing.T) {
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 				"/tests/test/testdata/pdfengines/sample2.pdf",
 			},
+			expectError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {

pkg/modules/qpdf/qpdf_test.go

@@ -97,6 +97,7 @@ func TestQPdf_Merge(t *testing.T) {
 			inputPaths: []string{
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 			},
+			expectError: false,
 		},
 		{
 			scenario: "many files success",
@@ -105,6 +106,7 @@ func TestQPdf_Merge(t *testing.T) {
 				"/tests/test/testdata/pdfengines/sample1.pdf",
 				"/tests/test/testdata/pdfengines/sample2.pdf",
 			},
+			expectError: false,
 		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {

pkg/modules/webhook/middleware.go

@@ -113,13 +113,19 @@ func webhookMiddleware(w *Webhook) api.Middleware {
 						}
 					}
 
+					// Retrieve values from echo.Context before it get recycled.
+					// See https://github.com/gotenberg/gotenberg/issues/1000.
+					startTime := c.Get("startTime").(time.Time)
+					traceHeader := c.Get("traceHeader").(string)
+					trace := c.Get("trace").(string)
+
 					client := &client{
 						url:              webhookUrl,
 						method:           webhookMethod,
 						errorUrl:         webhookErrorUrl,
 						errorMethod:      webhookErrorMethod,
 						extraHttpHeaders: extraHttpHeaders,
-						startTime:        c.Get("startTime").(time.Time),
+						startTime:        startTime,
 
 						client: &retryablehttp.Client{
 							HTTPClient: &http.Client{
@@ -157,8 +163,8 @@ func webhookMiddleware(w *Webhook) api.Middleware {
 						}
 
 						headers := map[string]string{
-							echo.HeaderContentType:        echo.MIMEApplicationJSON,
+							echo.HeaderContentType: echo.MIMEApplicationJSON,
-							c.Get("traceHeader").(string): c.Get("trace").(string),
+							traceHeader:            trace,
 						}
 
 						err = client.send(bytes.NewReader(b), headers, true)
@@ -236,7 +242,7 @@ func webhookMiddleware(w *Webhook) api.Middleware {
 							echo.HeaderContentDisposition: fmt.Sprintf("attachement; filename=%q", ctx.OutputFilename(outputPath)),
 							echo.HeaderContentType:        http.DetectContentType(fileHeader),
 							echo.HeaderContentLength:      strconv.FormatInt(fileStat.Size(), 10),
-							c.Get("traceHeader").(string): c.Get("trace").(string),
+							traceHeader:                   trace,
 						}
 
 						// Send the output file to the webhook.

scripts/release.sh

@@ -9,9 +9,10 @@ GOTENBERG_USER_GID="$3"
 GOTENBERG_USER_UID="$4"
 NOTO_COLOR_EMOJI_VERSION="$5"
 PDFTK_VERSION="$6"
-DOCKER_REGISTRY="$7"
+PDFCPU_VERSION="$7"
-DOCKER_REPOSITORY="$8"
+DOCKER_REGISTRY="$8"
-LINUX_AMD64_RELEASE="$9"
+DOCKER_REPOSITORY="$9"
+LINUX_AMD64_RELEASE="${10}"
 
 # Find out if given version is "semver".
 GOTENBERG_VERSION="${GOTENBERG_VERSION//v}"
@@ -65,6 +66,7 @@ docker buildx build \
   --build-arg GOTENBERG_USER_UID="$GOTENBERG_USER_UID" \
   --build-arg NOTO_COLOR_EMOJI_VERSION="$NOTO_COLOR_EMOJI_VERSION" \
   --build-arg PDFTK_VERSION="$PDFTK_VERSION" \
+  --build-arg PDFCPU_VERSION="$PDFCPU_VERSION" \
   $PLATFORM_FLAG \
   "${TAGS[@]}" \
   --push \

test/testdata/chromium/html/index.html

@@ -2,6 +2,12 @@
 <html lang="en">
 <head>
     <meta charset="utf-8">
+    <!-- net::ERR_FILE_NOT_FOUND -->
+    <link rel="stylesheet" type="text/css" href="doesnotexist.css">
+    <!-- net::ERR_CONNECTION_REFUSED -->
+    <link rel="stylesheet" type="text/css" href="http://localhost:100/style.css">
+    <!-- 400 Bad Request -->
+    <link rel="stylesheet" type="text/css" href="https://httpstat.us/400">
     <link rel="stylesheet" type="text/css" href="style.css">
     <link href="https://fonts.googleapis.com/css?family=Montserrat" rel="stylesheet">
     <title>Gutenberg</title>
@@ -23,7 +29,7 @@
 
     <blockquote cite="https://sites.google.com/site/johanngutenbergper5/q">
         <p>It is a press, certainly, but a press from which shall flow in inexhaustible streams...Through it, God will spread His Word. A spring of truth shall flow from it: like a new star it shall scatter the darkness of ignorance, and cause a light heretofore unknown to shine amongst men.</p>
-        <footer>— <a href="https://sites.google.com/site/johanngutenbergper5/q">Johannes Gutenberg</a></cite></footer>
+        <footer>— <a href="https://sites.google.com/site/johanngutenbergper5/q">Johannes Gutenberg</a></footer>
     </blockquote>
 </div>
 

test/testdata/chromium/markdown/index.html

@@ -2,6 +2,12 @@
 <html lang="en">
 <head>
     <meta charset="utf-8">
+    <!-- net::ERR_FILE_NOT_FOUND -->
+    <link rel="stylesheet" type="text/css" href="doesnotexist.css">
+    <!-- net::ERR_CONNECTION_REFUSED -->
+    <link rel="stylesheet" type="text/css" href="http://localhost:100/style.css">
+    <!-- 400 Bad Request -->
+    <link rel="stylesheet" type="text/css" href="https://httpstat.us/400">
     <link rel="stylesheet" type="text/css" href="style.css">
     <link href="https://fonts.googleapis.com/css?family=Montserrat" rel="stylesheet">
     <title>Gutenberg</title>
@@ -15,7 +21,7 @@
 
     <blockquote cite="https://sites.google.com/site/johanngutenbergper5/q">
         <p>It is a press, certainly, but a press from which shall flow in inexhaustible streams...Through it, God will spread His Word. A spring of truth shall flow from it: like a new star it shall scatter the darkness of ignorance, and cause a light heretofore unknown to shine amongst men.</p>
-        <footer>— <a href="https://sites.google.com/site/johanngutenbergper5/q">Johannes Gutenberg</a></cite></footer>
+        <footer>— <a href="https://sites.google.com/site/johanngutenbergper5/q">Johannes Gutenberg</a></footer>
     </blockquote>
 </div>