home/alospiesjs/www/apis/youtube/vendor/symfony/http-kernel/EventListener/SurrogateListener.php000060400000003375151161241010027337 0ustar00 * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\HttpKernel\EventListener; use Symfony\Component\EventDispatcher\EventSubscriberInterface; use Symfony\Component\HttpKernel\Event\ResponseEvent; use Symfony\Component\HttpKernel\HttpCache\HttpCache; use Symfony\Component\HttpKernel\HttpCache\SurrogateInterface; use Symfony\Component\HttpKernel\KernelEvents; /** * SurrogateListener adds a Surrogate-Control HTTP header when the Response needs to be parsed for Surrogates. * * @author Fabien Potencier * * @final */ class SurrogateListener implements EventSubscriberInterface { private $surrogate; public function __construct(SurrogateInterface $surrogate = null) { $this->surrogate = $surrogate; } /** * Filters the Response. */ public function onKernelResponse(ResponseEvent $event) { if (!$event->isMainRequest()) { return; } $kernel = $event->getKernel(); $surrogate = $this->surrogate; if ($kernel instanceof HttpCache) { $surrogate = $kernel->getSurrogate(); if (null !== $this->surrogate && $this->surrogate->getName() !== $surrogate->getName()) { $surrogate = $this->surrogate; } } if (null === $surrogate) { return; } $surrogate->addSurrogateControl($event->getResponse()); } public static function getSubscribedEvents(): array { return [ KernelEvents::RESPONSE => 'onKernelResponse', ]; } }