www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/big_pipe/tests/modules/big_pipe_test/src/EventSubscriber/BigPipeTestSubscriber.php

   1 <?php
   2
   3 namespace Drupal\big_pipe_test\EventSubscriber;
   4
   5 use Drupal\Core\Render\AttachmentsInterface;
   6 use Drupal\Core\Render\HtmlResponse;
   7 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
   8 use Symfony\Component\HttpKernel\KernelEvents;
   9 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  10
  11 class BigPipeTestSubscriber implements EventSubscriberInterface {
  12
  13   /**
  14    * @see \Drupal\big_pipe_test\BigPipeTestController::responseException()
  15    *
  16    * @var string
  17    */
  18   const CONTENT_TRIGGER_EXCEPTION = 'NOPE!NOPE!NOPE!';
  19
  20   /**
  21    * Triggers exception for embedded HTML/AJAX responses with certain content.
  22    *
  23    * @see \Drupal\big_pipe_test\BigPipeTestController::responseException()
  24    *
  25    * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
  26    *   The event to process.
  27    *
  28    * @throws \Exception
  29    */
  30   public function onRespondTriggerException(FilterResponseEvent $event) {
  31     $response = $event->getResponse();
  32
  33     if (!$response instanceof AttachmentsInterface) {
  34       return;
  35     }
  36
  37     $attachments = $response->getAttachments();
  38     if (!isset($attachments['big_pipe_placeholders']) && !isset($attachments['big_pipe_nojs_placeholders'])) {
  39       if (strpos($response->getContent(), static::CONTENT_TRIGGER_EXCEPTION) !== FALSE) {
  40         throw new \Exception('Oh noes!');
  41       }
  42     }
  43   }
  44
  45   /**
  46    * Exposes all BigPipe placeholders (JS and no-JS) via headers for testing.
  47    *
  48    * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
  49    *   The event to process.
  50    */
  51   public function onRespondSetBigPipeDebugPlaceholderHeaders(FilterResponseEvent $event) {
  52     $response = $event->getResponse();
  53     if (!$response instanceof HtmlResponse) {
  54       return;
  55     }
  56
  57     $attachments = $response->getAttachments();
  58
  59     $response->headers->set('BigPipe-Test-Placeholders', '<none>');
  60     $response->headers->set('BigPipe-Test-No-Js-Placeholders', '<none>');
  61
  62     if (!empty($attachments['big_pipe_placeholders'])) {
  63       $response->headers->set('BigPipe-Test-Placeholders', implode(' ', array_keys($attachments['big_pipe_placeholders'])));
  64     }
  65
  66     if (!empty($attachments['big_pipe_nojs_placeholders'])) {
  67       $response->headers->set('BigPipe-Test-No-Js-Placeholders', implode(' ', array_map('rawurlencode', array_keys($attachments['big_pipe_nojs_placeholders']))));
  68     }
  69   }
  70
  71   /**
  72    * {@inheritdoc}
  73    */
  74   public static function getSubscribedEvents() {
  75     // Run just before \Drupal\big_pipe\EventSubscriber\HtmlResponseBigPipeSubscriber::onRespond().
  76     $events[KernelEvents::RESPONSE][] = ['onRespondSetBigPipeDebugPlaceholderHeaders', -9999];
  77
  78     // Run just after \Drupal\big_pipe\EventSubscriber\HtmlResponseBigPipeSubscriber::onRespond().
  79     $events[KernelEvents::RESPONSE][] = ['onRespondTriggerException', -10001];
  80
  81     return $events;
  82   }
  83
  84 }