function FinishResponseSubscriber::onAllResponds

Sets extra headers on any responses, also subrequest ones.

Parameters

\Symfony\Component\HttpKernel\Event\ResponseEvent $event: The event to process.

File

core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php, line 68

Class

FinishResponseSubscriber

Response subscriber to handle finished responses.

Namespace

Code

public function onAllResponds(ResponseEvent $event) {
    $response = $event->getResponse();
    // Always add the 'http_response' cache tag to be able to invalidate every
    // response, for example after rebuilding routes.
    if ($response instanceof CacheableResponseInterface) {
        $response->getCacheableMetadata()
            ->addCacheTags([
            'http_response',
        ]);
    }
}