src/EventSubscriber/PreviewFileSubscriber.php line 22

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  1. <?php
  3. // src/EventSubscriber/PreviewFileSubscriber.php
  5. namespace App\EventSubscriber;
  7. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  8. use Symfony\Component\HttpFoundation\BinaryFileResponse;
  9. use Symfony\Component\HttpFoundation\Request;
  10. use Symfony\Component\HttpFoundation\ResponseHeaderBag;
  11. use Symfony\Component\HttpKernel\Event\ResponseEvent;
  12. use Symfony\Component\HttpKernel\KernelEvents;
  14. class PreviewFileSubscriber implements EventSubscriberInterface {
  16.     public static function getSubscribedEvents(): array {
  17.         return [
  18.             KernelEvents::RESPONSE => 'onKernelResponse',
  19.         ];
  20.     }
  22.     public function onKernelResponse(ResponseEvent $event): void {
  23.         $request = $event->getRequest();
  24.         $response = $event->getResponse();
  26.         if (!$request->query->getBoolean('preview')) {
  27.             return;
  28.         }
  30.         if (!$response instanceof BinaryFileResponse) {
  31.             return;
  32.         }
  34.         // Cambia a inline para mostrarlo en navegador
  35.         $response->setContentDisposition(
  36.                 ResponseHeaderBag::DISPOSITION_INLINE,
  37.                 $response->getFile()->getFilename()
  38.         );
  40.         // Extras: Añadir metadatos como cabeceras personalizadas
  41.         $file = $response->getFile();
  42.         $response->headers->set('X-File-Name', $file->getFilename());
  43.         $response->headers->set('X-File-Size', $file->getSize());
  44.         $response->headers->set('X-File-Extension', $file->getExtension());
  45.         $response->headers->set('X-File-Mime', mime_content_type($file->getPathname()));
  46.     }
  47. }