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