Load the dumped HTML from a public URL instead of the file:// method.

The file:// method introduces CORS issues when loading local files like fonts. By going through the
web server we can load anything we want without issues.

src/Service/PdfGenerator.php

@@ -5,18 +5,25 @@
 namespace Dreadnip\ChromePdfBundle\Service;
 
 use HeadlessChromium\BrowserFactory;
+use HeadlessChromium\Page;
 use Symfony\Component\Filesystem\Filesystem;
+use Symfony\Component\HttpFoundation\RequestStack;
 
 final class PdfGenerator
 {
     private BrowserFactory $browserFactory;
+    private RequestStack $requestStack;
     private Filesystem $fileSystem;
 
+    private const TEMP_FOLDER = 'tmp/';
+
     public function __construct(
         BrowserFactory $browserFactory,
+        RequestStack $requestStack,
         Filesystem $fileSystem
     ) {
         $this->browserFactory = $browserFactory;
+        $this->requestStack = $requestStack;
         $this->fileSystem = $fileSystem;
     }
 
@@ -28,25 +35,32 @@ public function __construct(
      * @param array $options The PDF options you want to use during the PDF creation
      *
      * @return string
+     * @throws \Exception
      */
-    public function generate(string $html, string $path, array $options = []): string
+    public function generate(string $html, string $path, array $printOptions = [], array $browserOptions = []): string
     {
         /*
          * Chrome can't load HTML straight from a string so we have to
          * save the passed HTML to a temp file and read it from there.
          */
         $tempPath = $this->generateTemporaryFilePath();
+
+        $tempUrl = $this->getAbsoluteUrl($tempPath);
+
         $this->fileSystem->dumpFile($tempPath, $html);
 
-        $browser = $this->browserFactory->createBrowser();
+        $browser = $this->browserFactory->createBrowser($browserOptions);
 
         try {
             $page = $browser->createPage();
-            $page->navigate('file://' . $tempPath)->waitForNavigation();
 
-            $pdf = $page->pdf($options);
+            /*
+             * We check for "network idle" instead of "load" by default to avoid
+             * missing resources like images and webfonts that can take a split second longer to load
+             */
+            $page->navigate($tempUrl)->waitForNavigation(Page::NETWORK_IDLE);
 
-            $pdf->saveToFile($path);
+            $page->pdf($printOptions)->saveToFile($path);
 
             // Clean up the temp file
             $this->fileSystem->remove($tempPath);
@@ -58,12 +72,24 @@ public function generate(string $html, string $path, array $options = []): strin
     }
 
     /**
-     * Generates a temporary file name in the system temp dir
+     * Generates a temporary file name in your project's public folder
      *
      * @return string
+     * @throws \Exception
      */
     private function generateTemporaryFilePath(): string
     {
-        return sys_get_temp_dir() . '/' . bin2hex(random_bytes(32)) . '.html';
+        return self::TEMP_FOLDER . bin2hex(random_bytes(32)) . '.html';
+    }
+
+    /**
+     * Return the absolute URL for our temporary dump file
+     *
+     * @param string $tempPath
+     * @return string
+     */
+    private function getAbsoluteUrl(string $tempPath): string
+    {
+        return $this->requestStack->getCurrentRequest()->getSchemeAndHttpHost() . '/' . $tempPath;
     }
 }