vendor/nelmio/cors-bundle/EventListener/CacheableResponseVaryListener.php line 12

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  1. <?php
  3. namespace Nelmio\CorsBundle\EventListener;
  5. use Symfony\Component\HttpKernel\Event\ResponseEvent;
  7. /**
  8.  * When a response is cacheable the `Vary` header has to include `Origin`.
  9.  */
  10. final class CacheableResponseVaryListener
  11. {
  12.     public function onResponse(ResponseEvent $event)
  13.     {
  14.         $response = $event->getResponse();
  16.         if (!$response->isCacheable()) {
  17.             return;
  18.         }
  20.         if (!\in_array('Origin', $response->getVary(), true)) {
  21.             $response->setVary(array_merge(['Origin'], $response->getVary()));
  22.         }
  23.     }
  24. }