[4.x]: DOMPDF not working on Craft Cloud

[timkelty]

What happened?

Thanks to @craig-lt for the report

The download PDF functionality is throwing a 500 error.
It seems to be related to the temp path DomPDF is trying to use for (custom) fonts.

This workaround seems to work for now:

Event::on(
Pdfs::class,
Pdfs::EVENT_MODIFY_RENDER_OPTIONS,
function(PdfRenderOptionsEvent $event) {
// Use Craft's designated temporary path, which is writable on Craft Cloud
$cloudTempPath = Craft::$app->getPath()->getTempPath();
$dompdfTempDir = $cloudTempPath . DIRECTORY_SEPARATOR . 'dompdf_temp';
$dompdfFontCacheDir = $cloudTempPath . DIRECTORY_SEPARATOR . 'dompdf_font_cache';

try {
FileHelper::createDirectory($dompdfTempDir);
FileHelper::createDirectory($dompdfFontCacheDir);
} catch (\yii\base\ErrorException $e) {
Craft::error("Could not create Dompdf temp/cache directories: " . $e->getMessage(), __METHOD__);
return; // Stop further processing in this listener
}

$event->options->setTempDir($dompdfTempDir);
$event->options->setFontCache($dompdfFontCacheDir);
$event->options->setFontDir($dompdfFontCacheDir);

// Set other helpful Dompdf options using setters
$event->options->setIsRemoteEnabled(true);
$event->options->setDefaultFont('sans-serif');
}
);

Craft CMS version

4.14.10

Craft Commerce version

4.8.2

PHP version

8.1

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions

[linear]

PT-2745 [4.x]: DOMPDF not working on Craft Cloud