ClientErrorResponseSubscriber.php in Zircon Profile 8
Same filename and directory in other branches
Namespace
Drupal\Core\EventSubscriberFile
core/lib/Drupal/Core/EventSubscriber/ClientErrorResponseSubscriber.phpView source
<?php
/**
* @file
* Contains \Drupal\Core\EventSubscriber\ClientErrorResponseSubscriber.
*/
namespace Drupal\Core\EventSubscriber;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Cache\CacheableResponseInterface;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
/**
* Response subscriber to set the '4xx-response' cache tag on 4xx responses.
*/
class ClientErrorResponseSubscriber implements EventSubscriberInterface {
/**
* Sets the '4xx-response' cache tag on 4xx responses.
*
* @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;
}
if ($response
->isClientError()) {
$http_4xx_response_cacheability = new CacheableMetadata();
$http_4xx_response_cacheability
->setCacheTags([
'4xx-response',
]);
$response
->addCacheableDependency($http_4xx_response_cacheability);
}
}
/**
* {@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;
}
}
Classes
Name![]() |
Description |
---|---|
ClientErrorResponseSubscriber | Response subscriber to set the '4xx-response' cache tag on 4xx responses. |