Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\EventSubscriber;
Chris@0: 
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
Chris@0: use Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException;
Chris@0: use Symfony\Component\HttpKernel\KernelEvents;
Chris@0: 
Chris@0: /**
Chris@0:  * Throws 406 if requesting non-HTML format and controller returns render array.
Chris@0:  */
Chris@0: class RenderArrayNonHtmlSubscriber implements EventSubscriberInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * Throws an HTTP 406 error if client requested a non-HTML format.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent $event
Chris@0:    *   The event to process.
Chris@0:    */
Chris@0:   public function onRespond(GetResponseForControllerResultEvent $event) {
Chris@0:     $request = $event->getRequest();
Chris@0:     $result = $event->getControllerResult();
Chris@0: 
Chris@0:     // If this is a render array then we assume that the router went with the
Chris@0:     // generic controller and not one with a format. If the format requested is
Chris@0:     // not HTML though, we can also assume that the requested format is invalid
Chris@0:     // so we provide a 406 response.
Chris@0:     if (is_array($result) && $request->getRequestFormat() !== 'html') {
Chris@0:       throw new NotAcceptableHttpException('Not acceptable format: ' . $request->getRequestFormat());
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function getSubscribedEvents() {
Chris@0:     $events[KernelEvents::VIEW][] = ['onRespond', -10];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }