minor refactoring: using default scale from default options

Add support for Chrome scaling.

Makefile

@@ -58,7 +58,7 @@ image:
 
 # start the API using previously built Docker image.
 gotenberg:
-	docker run -it --rm -e MAXIMUM_WAIT_TIMEOUT=$(MAXIMUM_WAIT_TIMEOUT) -e MAXIMUM_WAIT_DELAY=$(MAXIMUM_WAIT_DELAY) -e MAXIMUM_WEBHOOK_URL_TIMEOUT=$(MAXIMUM_WEBHOOK_URL_TIMEOUT) -e DEFAULT_WEBHOOK_URL_TIMEOUT=$(DEFAULT_WEBHOOK_URL_TIMEOUT) -e MAXIMUM_WEBHOOK_URL_TIMEOUT=$(MAXIMUM_WEBHOOK_URL_TIMEOUT) -e DEFAULT_LISTEN_PORT=$(DEFAULT_LISTEN_PORT) -e DISABLE_GOOGLE_CHROME=$(DISABLE_GOOGLE_CHROME) -e DISABLE_UNOCONV=$(DISABLE_UNOCONV) -e LOG_LEVEL=$(LOG_LEVEL) -e ROOT_PATH=$(ROOT_PATH) -e DEFAULT_GOOGLE_CHROME_RPCC_BUFFER_SIZE=$(DEFAULT_GOOGLE_CHROME_RPCC_BUFFER_SIZE)  -p "$(DEFAULT_LISTEN_PORT):$(DEFAULT_LISTEN_PORT)" $(DOCKER_REPOSITORY)/gotenberg:$(VERSION)
+	docker run -it --rm -e MAXIMUM_WAIT_TIMEOUT=$(MAXIMUM_WAIT_TIMEOUT) -e MAXIMUM_WAIT_DELAY=$(MAXIMUM_WAIT_DELAY) -e MAXIMUM_WEBHOOK_URL_TIMEOUT=$(MAXIMUM_WEBHOOK_URL_TIMEOUT) -e DEFAULT_WEBHOOK_URL_TIMEOUT=$(DEFAULT_WEBHOOK_URL_TIMEOUT) -e MAXIMUM_WEBHOOK_URL_TIMEOUT=$(MAXIMUM_WEBHOOK_URL_TIMEOUT) -e DEFAULT_LISTEN_PORT=$(DEFAULT_LISTEN_PORT) -e DISABLE_GOOGLE_CHROME=$(DISABLE_GOOGLE_CHROME) -e DISABLE_UNOCONV=$(DISABLE_UNOCONV) -e LOG_LEVEL=$(LOG_LEVEL) -e ROOT_PATH=$(ROOT_PATH) -e DEFAULT_GOOGLE_CHROME_RPCC_BUFFER_SIZE=$(DEFAULT_GOOGLE_CHROME_RPCC_BUFFER_SIZE)  -p "$(DEFAULT_LISTEN_PORT):$(DEFAULT_LISTEN_PORT)" $(DOCKER_REGISTRY)/gotenberg:$(VERSION)
 
 # publish Gotenberg images according to version.
 publish:

build/docs/content/01-install.md

@@ -24,7 +24,7 @@ For instance:
 
 ```bash
 $ git clone https://github.com/thecodingmachine/gotenberg.git
-$ make publish GOTENBERG_USER_GID=your_custom_gid GOTENBERG_USER_UID=your_custom_uid DOCKER_REGISTRY=your_registry DOCKER_USER=registry_user DOCKER_PASSWORD=registry_password VERSION=6.1.0 
+$ make publish GOTENBERG_USER_GID=your_custom_gid GOTENBERG_USER_UID=your_custom_uid DOCKER_REGISTRY=your_registry DOCKER_USER=registry_user DOCKER_PASSWORD=registry_password VERSION=6.2.0
 ```
 
 > `master` branch is always up-to-date with the latest version of the API.

build/docs/content/04-html.md

@@ -243,11 +243,11 @@ $dest = 'result.pdf';
 $client->store($request, $dest);
 ```
 
-## Paper size, margins, orientation
+## Paper size, margins, orientation, scaling
 
 You may also customize the resulting PDF format.
 
-By default, it will be rendered with `A4` size, `1 inch` margins and `portrait` orientation.
+By default, it will be rendered with `A4` size, `1 inch` margins and `portrait` orientation and 100% (`1.0`) page scale.
 
 > Paper size and margins have to be provided in `inches`. Same for margins.
 
@@ -265,6 +265,7 @@ $ curl --request POST \
     --form marginLeft=0 \
     --form marginRight=0 \
     --form landscape=true \
+    --form scale=0.75 \
     -o result.pdf
 ```
 
@@ -279,6 +280,7 @@ req := gotenberg.NewHTMLRequest(index)
 req.PaperSize(gotenberg.A4)
 req.Margins(gotenberg.NoMargins)
 req.Landscape(true)
+req.Scale(0.75)
 dest := "result.pdf"
 c.Store(req, dest)
 ```
@@ -297,6 +299,7 @@ $request = new HTMLRequest($index);
 $request->setPaperSize(Request::A4);
 $request->setMargins(Request::NO_MARGINS);
 $request->setLandscape(true);
+$request->setScale(0.75);
 $dest = 'result.pdf';
 $client->store($request, $dest);
 ```

docs/index.html

@@ -675,19 +675,19 @@ $dest = 'result.pdf';
 $client->store($request, $dest);
 </pre>
 
-<h2 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation" href="#html.paper_size_margins_orientation">
+<h2 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation_scaling" href="#html.paper_size_margins_orientation_scaling">
 	<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-link"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg>
-</a>Paper size, margins, orientation</h2>
+</a>Paper size, margins, orientation, scaling</h2>
 
 <p>You may also customize the resulting PDF format.</p>
 
-<p>By default, it will be rendered with <code>A4</code> size, <code>1 inch</code> margins and <code>portrait</code> orientation.</p>
+<p>By default, it will be rendered with <code>A4</code> size, <code>1 inch</code> margins and <code>portrait</code> orientation and 100% (<code>1.0</code>) page scale.</p>
 
 <blockquote>
 <p>Paper size and margins have to be provided in <code>inches</code>. Same for margins.</p>
 </blockquote>
 
-<h3 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation.c_url" href="#html.paper_size_margins_orientation.c_url">
+<h3 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation_scaling.c_url" href="#html.paper_size_margins_orientation_scaling.c_url">
 	<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-link"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg>
 </a>cURL</h3>
 
@@ -702,10 +702,11 @@ $client-&gt;store($request, $dest);
 </span><span class="se"></span>    --form <span class="nv">marginLeft</span><span class="o">=</span><span class="m">0</span> <span class="se">\
 </span><span class="se"></span>    --form <span class="nv">marginRight</span><span class="o">=</span><span class="m">0</span> <span class="se">\
 </span><span class="se"></span>    --form <span class="nv">landscape</span><span class="o">=</span><span class="nb">true</span> <span class="se">\
+</span><span class="se"></span>    --form <span class="nv">scale</span><span class="o">=</span>0.75 <span class="se">\
 </span><span class="se"></span>    -o result.pdf
 </pre>
 
-<h3 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation.go" href="#html.paper_size_margins_orientation.go">
+<h3 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation_scaling.go" href="#html.paper_size_margins_orientation_scaling.go">
 	<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-link"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg>
 </a>Go</h3>
 
@@ -717,11 +718,12 @@ $client-&gt;store($request, $dest);
 <span class="nx">req</span><span class="p">.</span><span class="nf">PaperSize</span><span class="p">(</span><span class="nx">gotenberg</span><span class="p">.</span><span class="nx">A4</span><span class="p">)</span>
 <span class="nx">req</span><span class="p">.</span><span class="nf">Margins</span><span class="p">(</span><span class="nx">gotenberg</span><span class="p">.</span><span class="nx">NoMargins</span><span class="p">)</span>
 <span class="nx">req</span><span class="p">.</span><span class="nf">Landscape</span><span class="p">(</span><span class="kc">true</span><span class="p">)</span>
+<span class="nx">req</span><span class="p">.</span><span class="nf">Scale</span><span class="p">(</span><span class="mf">0.75</span><span class="p">)</span>
 <span class="nx">dest</span> <span class="o">:=</span> <span class="s">&#34;result.pdf&#34;</span>
 <span class="nx">c</span><span class="p">.</span><span class="nf">Store</span><span class="p">(</span><span class="nx">req</span><span class="p">,</span> <span class="nx">dest</span><span class="p">)</span>
 </pre>
 
-<h3 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation.php" href="#html.paper_size_margins_orientation.php">
+<h3 class="Heading"><a class="Anchor" aria-hidden="true" id="html.paper_size_margins_orientation_scaling.php" href="#html.paper_size_margins_orientation_scaling.php">
 	<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-link"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg>
 </a>PHP</h3>
 
@@ -736,6 +738,7 @@ $request = new HTMLRequest($index);
 $request-&gt;setPaperSize(Request::A4);
 $request-&gt;setMargins(Request::NO_MARGINS);
 $request-&gt;setLandscape(true);
+$request-&gt;setScale(0.75);
 $dest = &#39;result.pdf&#39;;
 $client-&gt;store($request, $dest);
 </pre>

go.mod

@@ -8,20 +8,23 @@ require (
 	github.com/gorilla/websocket v1.4.1 // indirect
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
-	github.com/labstack/echo/v4 v4.1.10
+	github.com/labstack/echo/v4 v4.1.11
 	github.com/labstack/gommon v0.3.0
-	github.com/mafredri/cdp v0.24.2
+	github.com/mafredri/cdp v0.25.0
-	github.com/mattn/go-isatty v0.0.9
+	github.com/mattn/go-colorable v0.1.4 // indirect
+	github.com/mattn/go-isatty v0.0.11
 	github.com/microcosm-cc/bluemonday v1.0.2
 	github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2
 	github.com/russross/blackfriday/v2 v2.0.1
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/sirupsen/logrus v1.4.2
 	github.com/stretchr/testify v1.4.0
-	golang.org/x/crypto v0.0.0-20190927123631-a832865fa7ad // indirect
+	github.com/valyala/fasttemplate v1.1.0 // indirect
-	golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3 // indirect
+	golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413 // indirect
+	golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553 // indirect
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
-	golang.org/x/sys v0.0.0-20190927073244-c990c680b611 // indirect
+	golang.org/x/sys v0.0.0-20191210023423-ac6580df4449 // indirect
 	golang.org/x/text v0.3.2
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	gopkg.in/yaml.v2 v2.2.7 // indirect
 )

go.sum

@@ -18,18 +18,22 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/labstack/echo/v4 v4.1.10 h1:/yhIpO50CBInUbE/nHJtGIyhBv0dJe2cDAYxc3V3uMo=
+github.com/labstack/echo/v4 v4.1.11 h1:z0BZoArY4FqdpUEl+wlHp4hnr/oSR6MTmQmv8OHSoww=
-github.com/labstack/echo/v4 v4.1.10/go.mod h1:i541M3Fj6f76NZtHSj7TXnyM8n2gaodfvfxNnFqi74g=
+github.com/labstack/echo/v4 v4.1.11/go.mod h1:i541M3Fj6f76NZtHSj7TXnyM8n2gaodfvfxNnFqi74g=
 github.com/labstack/gommon v0.3.0 h1:JEeO0bvc78PKdyHxloTKiF8BD5iGrH8T6MSeGvSgob0=
 github.com/labstack/gommon v0.3.0/go.mod h1:MULnywXg0yavhxWKc+lOruYdAhDwPK9wf0OL7NoOu+k=
-github.com/mafredri/cdp v0.24.2 h1:Rzhj/EQw9opbiwUpNML7P+4Hvf0/nSYPaDbiCEpILOM=
+github.com/mafredri/cdp v0.25.0 h1:nXhdpjP8Nrhw+9jnMlljEF6xs2B3vXI/wSiKDOvOXGs=
-github.com/mafredri/cdp v0.24.2/go.mod h1:hgdiA0yp1uqhSaDOHJWPgXpMbh+LAfUdD9vbN2AM8gE=
+github.com/mafredri/cdp v0.25.0/go.mod h1:hgdiA0yp1uqhSaDOHJWPgXpMbh+LAfUdD9vbN2AM8gE=
 github.com/mattn/go-colorable v0.1.2 h1:/bC9yWikZXAL9uJdulbSfyVNIR3n3trXl+v8+1sx8mU=
 github.com/mattn/go-colorable v0.1.2/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
+github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
+github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-isatty v0.0.8 h1:HLtExJ+uU2HOZ+wI0Tt5DtUDrx8yhUqDcp7fYERX4CE=
 github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
 github.com/mattn/go-isatty v0.0.9 h1:d5US/mDsogSGW37IV293h//ZFaeajb69h+EHFsv2xGg=
 github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
+github.com/mattn/go-isatty v0.0.11 h1:FxPOTFNqGkuDUGi3H/qkUbQO4ZiBa2brKq5r0l8TGeM=
+github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
 github.com/microcosm-cc/bluemonday v1.0.2 h1:5lPfLTTAvAbtS0VqT+94yOtFnGfUWYyx0+iToC3Os3s=
 github.com/microcosm-cc/bluemonday v1.0.2/go.mod h1:iVP4YcDBq+n/5fb23BhYFvIMq/leAFZyRl6bYmGDlGc=
 github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2 h1:JhzVVoYvbOACxoUmOs6V/G4D5nPVUW73rKvXxP4XUJc=
@@ -51,15 +55,17 @@ github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6Kllzaw
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasttemplate v1.0.1 h1:tY9CJiPnMXf1ERmG2EyK7gNUd+c6RKGD0IfU8WdUSz8=
 github.com/valyala/fasttemplate v1.0.1/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
+github.com/valyala/fasttemplate v1.1.0 h1:RZqt0yGBsps8NGvLSGW804QQqCUYYLsaOjTVHy1Ocw4=
+github.com/valyala/fasttemplate v1.1.0/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 h1:HuIa8hRrWRSrqYzx1qI49NNxhdi2PrY7gxVSq1JjLDc=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190927123631-a832865fa7ad h1:5E5raQxcv+6CZ11RrBYQe5WRbUIWpScjh0kvHZkZIrQ=
+golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413 h1:ULYEB3JvPRE/IfO+9uO7vKV/xzVTO7XPAwm8xbf4w2g=
-golang.org/x/crypto v0.0.0-20190927123631-a832865fa7ad/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3 h1:6KET3Sqa7fkVfD63QnAM81ZeYg5n4HwApOJkufONnHA=
+golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553 h1:efeOvDhwQ29Dj3SdAV/MJf8oukgn+8D8WgaCaRMchF8=
-golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -68,14 +74,17 @@ golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a h1:aYOabOQFp6Vj6W1F80affTUvO9UxmJRx8K0gsfABByQ=
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190927073244-c990c680b611 h1:q9u40nxWT5zRClI/uU9dHCiYGottAg6Nzz4YUQyHxdA=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190927073244-c990c680b611/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191210023423-ac6580df4449 h1:gSbV7h1NRL2G1xTg/owz62CST1oJBmxy4QpMMregXVQ=
+golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

internal/app/xhttp/handler_test.go

@@ -538,7 +538,8 @@ func TestOfficeHandler(t *testing.T) {
 	srv := New(config)
 	endpoint := officeEndpoint(config)
 	// should return 200.
-	body, contentType := test.OfficeMultipartForm(t, nil)
+	// note: increased the wait timeout as it happens to timeout from time to time.
+	body, contentType := test.OfficeMultipartForm(t, map[string]string{string(resource.WaitTimeoutArgKey): "30"})
 	req := httptest.NewRequest(http.MethodPost, endpoint, body)
 	req.Header.Set(echo.HeaderContentType, contentType)
 	test.AssertStatusCode(t, http.StatusOK, srv, req)

internal/app/xhttp/option.go

@@ -56,6 +56,10 @@ func chromePrinterOptions(r resource.Resource, config conf.Config) (printer.Chro
 		if err != nil {
 			return printer.ChromePrinterOptions{}, err
 		}
+		scale, err := resource.ScaleArg(r, config)
+		if err != nil {
+			return printer.ChromePrinterOptions{}, err
+		}
 		return printer.ChromePrinterOptions{
 			WaitTimeout:       waitTimeout,
 			WaitDelay:         waitDelay,
@@ -71,6 +75,7 @@ func chromePrinterOptions(r resource.Resource, config conf.Config) (printer.Chro
 			PageRanges:        pageRanges,
 			RpccBufferSize:    googleChromeRpccBufferSize,
 			CustomHTTPHeaders: make(map[string]string),
+			Scale:             scale,
 		}, nil
 	}
 	opts, err := resolver()

internal/app/xhttp/pkg/resource/arg.go

@@ -57,6 +57,9 @@ const (
 	// GoogleChromeRpccBufferSizeArgKey is the key
 	// of the argument "googleChromeRpccBufferSize".
 	GoogleChromeRpccBufferSizeArgKey ArgKey = "googleChromeRpccBufferSize"
+	// ScaleArgKey is the key
+	// of the argument "scale".
+	ScaleArgKey ArgKey = "scale"
 )
 
 /*
@@ -81,6 +84,7 @@ func ArgKeys() []ArgKey {
 		LandscapeArgKey,
 		PageRangesArgKey,
 		GoogleChromeRpccBufferSizeArgKey,
+		ScaleArgKey,
 	}
 }
 
@@ -294,3 +298,22 @@ func GoogleChromeRpccBufferSizeArg(r Resource, config conf.Config) (int64, error
 	}
 	return result, nil
 }
+
+/*
+ScaleArg is a helper for retrieving
+the "scale" argument as float64.
+*/
+func ScaleArg(r Resource, config conf.Config) (float64, error) {
+	const op string = "resource.ScaleArg"
+	opts := printer.DefaultChromePrinterOptions(config)
+	result, err := r.Float64Arg(
+		ScaleArgKey,
+		opts.Scale,
+		xassert.Float64NotInferiorTo(0.1),
+		xassert.Float64NotSuperiorTo(2.0),
+	)
+	if err != nil {
+		return result, xerror.New(op, err)
+	}
+	return result, nil
+}

internal/app/xhttp/pkg/resource/arg_test.go

@@ -26,6 +26,7 @@ func TestArgKeys(t *testing.T) {
 		LandscapeArgKey,
 		PageRangesArgKey,
 		GoogleChromeRpccBufferSizeArgKey,
+		ScaleArgKey,
 	}
 	assert.Equal(t, expected, ArgKeys())
 }
@@ -346,3 +347,50 @@ func TestGoogleChromeRpccBufferSizeArg(t *testing.T) {
 	err = r.Close()
 	assert.Nil(t, err)
 }
+
+func TestScaleArg(t *testing.T) {
+	const (
+		resourceDirectoryName string  = "foo"
+		defaultValue          float64 = 1.0
+	)
+	var expected float64
+	logger := test.DebugLogger()
+	config := conf.DefaultConfig()
+	r, err := New(logger, resourceDirectoryName)
+	assert.Nil(t, err)
+	// argument does not exist.
+	expected = defaultValue
+	v, err := ScaleArg(r, config)
+	assert.Nil(t, err)
+	assert.Equal(t, expected, v)
+	// argument exist.
+	expected = 0.5
+	r.WithArg(ScaleArgKey, "0.5")
+	v, err = ScaleArg(r, config)
+	assert.Nil(t, err)
+	assert.Equal(t, expected, v)
+	// should not be OK as argument
+	// value is < 0.1.
+	expected = defaultValue
+	r.WithArg(ScaleArgKey, "-1.0")
+	v, err = ScaleArg(r, config)
+	test.AssertError(t, err)
+	assert.Equal(t, expected, v)
+	// should not be OK as argument
+	// value is > 2.0.
+	expected = defaultValue
+	r.WithArg(ScaleArgKey, "2.1")
+	v, err = ScaleArg(r, config)
+	test.AssertError(t, err)
+	assert.Equal(t, expected, v)
+	// should not be OK as
+	// argument value is invalid.
+	expected = defaultValue
+	r.WithArg(ScaleArgKey, "foo")
+	v, err = ScaleArg(r, config)
+	test.AssertError(t, err)
+	assert.Equal(t, expected, v)
+	// finally...
+	err = r.Close()
+	assert.Nil(t, err)
+}

internal/pkg/chrome/chrome.go

@@ -48,8 +48,11 @@ func cmd(logger xlog.Logger) (*exec.Cmd, error) {
 	args := []string{
 		"--no-sandbox",
 		"--headless",
-		// see https://github.com/GoogleChrome/puppeteer/issues/2410.
+		// see https://github.com/thecodingmachine/gotenberg/issues/157.
-		"--font-render-hinting=medium",
+		"--disable-dev-shm-usage",
+		// See https://github.com/puppeteer/puppeteer/issues/661
+		// and https://github.com/puppeteer/puppeteer/issues/2410.
+		"--font-render-hinting=none",
 		"--remote-debugging-port=9222",
 		"--disable-gpu",
 		"--disable-translate",

internal/pkg/printer/chrome.go

@@ -45,6 +45,7 @@ type ChromePrinterOptions struct {
 	PageRanges        string
 	RpccBufferSize    int64
 	CustomHTTPHeaders map[string]string
+	Scale             float64
 }
 
 // DefaultChromePrinterOptions returns the default
@@ -66,6 +67,7 @@ func DefaultChromePrinterOptions(config conf.Config) ChromePrinterOptions {
 		PageRanges:        "",
 		RpccBufferSize:    config.DefaultGoogleChromeRpccBufferSize(),
 		CustomHTTPHeaders: make(map[string]string),
+		Scale:             1.0,
 	}
 }
 
@@ -176,7 +178,8 @@ func (p chromePrinter) Print(destination string) error {
 			SetDisplayHeaderFooter(true).
 			SetHeaderTemplate(p.opts.HeaderHTML).
 			SetFooterTemplate(p.opts.FooterHTML).
-			SetPrintBackground(true)
+			SetPrintBackground(true).
+			SetScale(p.opts.Scale)
 		if p.opts.PageRanges != "" {
 			printToPdfArgs.SetPageRanges(p.opts.PageRanges)
 		}