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1 <?php
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2
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3 namespace Drupal\Core\EventSubscriber;
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4
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5 use Drupal\Core\Render\HtmlResponse;
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6 use Drupal\Core\Render\AttachmentsResponseProcessorInterface;
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7 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
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8 use Symfony\Component\HttpKernel\KernelEvents;
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9 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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10
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11 /**
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12 * Response subscriber to handle HTML responses.
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13 */
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14 class HtmlResponseSubscriber implements EventSubscriberInterface {
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15
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16 /**
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17 * The HTML response attachments processor service.
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18 *
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19 * @var \Drupal\Core\Render\AttachmentsResponseProcessorInterface
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20 */
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21 protected $htmlResponseAttachmentsProcessor;
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22
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23 /**
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24 * Constructs a HtmlResponseSubscriber object.
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25 *
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26 * @param \Drupal\Core\Render\AttachmentsResponseProcessorInterface $html_response_attachments_processor
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27 * The HTML response attachments processor service.
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28 */
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29 public function __construct(AttachmentsResponseProcessorInterface $html_response_attachments_processor) {
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30 $this->htmlResponseAttachmentsProcessor = $html_response_attachments_processor;
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31 }
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32
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33 /**
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34 * Processes attachments for HtmlResponse responses.
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35 *
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36 * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
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37 * The event to process.
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38 */
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39 public function onRespond(FilterResponseEvent $event) {
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40 $response = $event->getResponse();
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41 if (!$response instanceof HtmlResponse) {
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42 return;
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43 }
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44
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45 $event->setResponse($this->htmlResponseAttachmentsProcessor->processAttachments($response));
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46 }
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47
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48 /**
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49 * {@inheritdoc}
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50 */
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51 public static function getSubscribedEvents() {
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52 $events[KernelEvents::RESPONSE][] = ['onRespond'];
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53 return $events;
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54 }
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55
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56 }
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