other files

src/Bridge/Glide/Bundle/DecoratingApiServerFactory.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Bridge\Glide\Bundle;
+
+use League\Glide\ServerFactory;
+
+class DecoratingApiServerFactory extends ServerFactory
+{
+    public function getApi()
+    {
+        // @phpstan-ignore-next-line
+        return new SkippingMimeTypesApi(parent::getApi(), $this->config['skipped_types'] ?? []);
+    }
+
+    public static function create(array $config = [])
+    {
+        $server = parent::create($config);
+        $decoratedFactory = (new self($config));
+
+        $server->setApi($decoratedFactory->getApi());
+
+        return $server;
+    }
+}

src/Bridge/Glide/Bundle/Resources/config/services/services.yaml

@@ -24,7 +24,7 @@ services:
     League\Glide\Responses\SymfonyResponseFactory: ~
 
     League\Glide\Server:
-        factory: [League\Glide\ServerFactory, create]
+        factory: [App\Bridge\Glide\Bundle\DecoratingApiServerFactory, create]
         arguments:
             - ~ # $config set by the extension
 

src/Bridge/Glide/Bundle/SkippingMimeTypesApi.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Bridge\Glide\Bundle;
+
+use League\Glide\Api\ApiInterface;
+use Symfony\Component\Mime\MimeTypes;
+use Symfony\Component\Mime\MimeTypesInterface;
+
+/**
+ * An API implementation allowing to skip Glide resize on some specific MIME types
+ * (usually unsupported by Glide, or removing GIF animations for instance),
+ * but still allowing to pass through Glide's server and move the images to a properly public location.
+ */
+class SkippingMimeTypesApi implements ApiInterface
+{
+    public function __construct(
+        private ApiInterface $decorated,
+        private array $skippedTypes = ['image/gif'],
+        private MimeTypesInterface $types = new MimeTypes()
+    ) {
+    }
+
+    public function run($source, array $params): string
+    {
+        if (\in_array($this->types->guessMimeType($source), $this->skippedTypes, true)) {
+            return (string) file_get_contents($source);
+        }
+
+        return $this->decorated->run($source, $params);
+    }
+}