Add feature to have chrome ignore certificate errors when printing using an URL.

cmd/gotenberg/main.go

@@ -28,7 +28,7 @@ func main() {
 	systemLogger.DebugOpf(op, "configuration: %+v", config)
 	if !config.DisableGoogleChrome() {
 		// start Google Chrome headless.
-		if err := chrome.Start(systemLogger); err != nil {
+		if err := chrome.Start(systemLogger, config.IgnoreCertificateErrors()); err != nil {
 			systemLogger.FatalOp(op, err)
 		}
 	}

internal/pkg/chrome/chrome.go

@@ -16,11 +16,11 @@ import (
 )
 
 // Start starts Google Chrome headless in background.
-func Start(logger xlog.Logger) error {
+func Start(logger xlog.Logger, urlIgnoreCertificateErrors bool) error {
 	const op string = "chrome.Start"
 	logger.DebugOp(op, "starting new Google Chrome headless process on port 9222...")
 	resolver := func() error {
-		cmd, err := cmd(logger)
+		cmd, err := cmd(logger, urlIgnoreCertificateErrors)
 		if err != nil {
 			return err
 		}
@@ -32,7 +32,7 @@ func Start(logger xlog.Logger) error {
 		// if the process failed to start correctly,
 		// we have to restart it.
 		if !isViable(logger) {
-			return restart(logger, cmd.Process)
+			return restart(logger, cmd.Process, urlIgnoreCertificateErrors)
 		}
 		return nil
 	}
@@ -42,7 +42,7 @@ func Start(logger xlog.Logger) error {
 	return nil
 }
 
-func cmd(logger xlog.Logger) (*exec.Cmd, error) {
+func cmd(logger xlog.Logger, urlIgnoreCertificateErrors bool) (*exec.Cmd, error) {
 	const op string = "chrome.cmd"
 	binary := "google-chrome-stable"
 	args := []string{
@@ -66,6 +66,11 @@ func cmd(logger xlog.Logger) (*exec.Cmd, error) {
 		"--mute-audio",
 		"--no-first-run",
 	}
+
+	if urlIgnoreCertificateErrors {
+		args = append(args, "--ignore-certificate-errors")
+	}
+
 	cmd, err := xexec.Command(logger, binary, args...)
 	if err != nil {
 		return nil, xerror.New(op, err)
@@ -93,7 +98,7 @@ func kill(logger xlog.Logger, proc *os.Process) error {
 	return nil
 }
 
-func restart(logger xlog.Logger, proc *os.Process) error {
+func restart(logger xlog.Logger, proc *os.Process, urlIgnoreCertificateErrors bool) error {
 	const op string = "chrome.restart"
 	logger.DebugOp(op, "restarting Google Chrome headless process using port 9222...")
 	resolver := func() error {
@@ -101,7 +106,7 @@ func restart(logger xlog.Logger, proc *os.Process) error {
 		if err := kill(logger, proc); err != nil {
 			return err
 		}
-		cmd, err := cmd(logger)
+		cmd, err := cmd(logger, urlIgnoreCertificateErrors)
 		if err != nil {
 			return err
 		}
@@ -113,7 +118,7 @@ func restart(logger xlog.Logger, proc *os.Process) error {
 		// if the process failed to restart correctly,
 		// we have to restart it again.
 		if !isViable(logger) {
-			return restart(logger, cmd.Process)
+			return restart(logger, cmd.Process, urlIgnoreCertificateErrors)
 		}
 		return nil
 	}

internal/pkg/conf/conf.go

@@ -40,6 +40,8 @@ const (
 	// DefaultGoogleChromeRpccBufferSizeEnvVar contains the name
 	// of the environment variable "DEFAULT_GOOGLE_CHROME_RPCC_BUFFER_SIZE".
 	DefaultGoogleChromeRpccBufferSizeEnvVar string = "DEFAULT_GOOGLE_CHROME_RPCC_BUFFER_SIZE"
+	// Allow self signed certificates when using a remote url
+	URLIgnoreCertificateErrorsEnvVar string = "URL_IGNORE_CERTIFICATE_ERRORS"
 )
 
 // Config contains the application
@@ -53,6 +55,7 @@ type Config struct {
 	defaultListenPort                 int64
 	disableGoogleChrome               bool
 	disableUnoconv                    bool
+	urlIgnoreCertificateErrors        bool
 	logLevel                          xlog.Level
 	rootPath                          string
 	maximumGoogleChromeRpccBufferSize int64
@@ -75,6 +78,7 @@ func DefaultConfig() Config {
 		rootPath:                          "/",
 		maximumGoogleChromeRpccBufferSize: 104857600, // ~100 MB
 		defaultGoogleChromeRpccBufferSize: 1048576,   // 1 MB
+		urlIgnoreCertificateErrors:        false,
 	}
 }
 
@@ -188,6 +192,14 @@ func FromEnv() (Config, error) {
 		if err != nil {
 			return c, err
 		}
+		urlIgnoreCertificateErrors, err := xassert.BoolFromEnv(
+			URLIgnoreCertificateErrorsEnvVar,
+			c.urlIgnoreCertificateErrors,
+		)
+		c.urlIgnoreCertificateErrors = urlIgnoreCertificateErrors
+		if err != nil {
+			return c, err
+		}
 		return c, nil
 	}
 	result, err := resolver()
@@ -274,3 +286,10 @@ func (c Config) MaximumGoogleChromeRpccBufferSize() int64 {
 func (c Config) DefaultGoogleChromeRpccBufferSize() int64 {
 	return c.defaultGoogleChromeRpccBufferSize
 }
+
+// IgnoreCertificateErrors returns true if
+// Google Chrome should ignore certificate errors
+// in case of self signed certificates for example.
+func (c Config) IgnoreCertificateErrors() bool {
+	return c.urlIgnoreCertificateErrors
+}

test/cmd/chrome.go

@@ -14,7 +14,7 @@ func main() {
 		systemLogger.FatalOp(op, err)
 	}
 	// start Google Chrome headless.
-	if err := chrome.Start(systemLogger); err != nil {
+	if err := chrome.Start(systemLogger, config.IgnoreCertificateErrors()); err != nil {
 		systemLogger.FatalOp(op, err)
 	}
 }