aleph1.co.uk Git - yaffs-website/blob - web/core/lib/Drupal/Core/EventSubscriber/EnforcedFormResponseSubscriber.php

   1 <?php
   2
   3 namespace Drupal\Core\EventSubscriber;
   4
   5 use Drupal\Core\Form\EnforcedResponse;
   6 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
   7 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
   8 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
   9 use Symfony\Component\HttpKernel\HttpKernelInterface;
  10 use Symfony\Component\HttpKernel\KernelEvents;
  11
  12 /**
  13  * Handle the EnforcedResponseException and deliver an EnforcedResponse.
  14  */
  15 class EnforcedFormResponseSubscriber implements EventSubscriberInterface {
  16
  17   /**
  18    * Replaces the response in case an EnforcedResponseException was thrown.
  19    */
  20   public function onKernelException(GetResponseForExceptionEvent $event) {
  21     if ($response = EnforcedResponse::createFromException($event->getException())) {
  22       // Setting the response stops the event propagation.
  23       $event->setResponse($response);
  24     }
  25   }
  26
  27   /**
  28    * Unwraps an enforced response.
  29    */
  30   public function onKernelResponse(FilterResponseEvent $event) {
  31     $response = $event->getResponse();
  32     if ($response instanceof EnforcedResponse && $event->getRequestType() === HttpKernelInterface::MASTER_REQUEST) {
  33       $event->setResponse($response->getResponse());
  34     }
  35   }
  36
  37   /**
  38    * {@inheritdoc}
  39    */
  40   public static function getSubscribedEvents() {
  41     $events[KernelEvents::EXCEPTION] = ['onKernelException', 128];
  42     $events[KernelEvents::RESPONSE] = ['onKernelResponse', 128];
  43
  44     return $events;
  45   }
  46
  47 }