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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\EventSubscriber\RouteAccessResponseSubscriber. | |
| */ | |
| namespace Drupal\Core\EventSubscriber; | |
| use Drupal\Core\Cache\CacheableResponseInterface; | |
| use Drupal\Core\Routing\AccessAwareRouterInterface; | |
| use Symfony\Component\HttpKernel\Event\FilterResponseEvent; | |
| use Symfony\Component\HttpKernel\KernelEvents; | |
| use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
| /** | |
| * Response subscriber to bubble the route's access result's cacheability. | |
| * | |
| * During routing, access checking is performed. The corresponding access result | |
| * is stored in the Request object's attributes, just like the matching route | |
| * object is. In case of a cacheable response, the route's access result also | |
| * determined the content of the response, and therefore the cacheability of the | |
| * route's access result should also be applied to the resulting response. | |
| * | |
| * @see \Drupal\Core\Routing\AccessAwareRouterInterface::ACCESS_RESULT | |
| * @see \Drupal\Core\Routing\AccessAwareRouter::matchRequest() | |
| * @see \Drupal\Core\Routing\AccessAwareRouter::checkAccess() | |
| */ | |
| class RouteAccessResponseSubscriber implements EventSubscriberInterface { | |
| /** | |
| * Bubbles the route's access result' cacheability metadata. | |
| * | |
| * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event | |
| * The event to process. | |
| */ | |
| public function onRespond(FilterResponseEvent $event) { | |
| if (!$event->isMasterRequest()) { | |
| return; | |
| } | |
| $response = $event->getResponse(); | |
| if (!$response instanceof CacheableResponseInterface) { | |
| return; | |
| } | |
| $request = $event->getRequest(); | |
| $access_result = $request->attributes->get(AccessAwareRouterInterface::ACCESS_RESULT); | |
| $response->addCacheableDependency($access_result); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public static function getSubscribedEvents() { | |
| // Priority 10, so that it runs before FinishResponseSubscriber, which will | |
| // expose the cacheability metadata in the form of headers. | |
| $events[KernelEvents::RESPONSE][] = ['onRespond', 10]; | |
| return $events; | |
| } | |
| } |