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<?php
namespace Drupal\Core\EventSubscriber;
use Drupal\Core\Render\HtmlResponse;
use Drupal\Core\Render\AttachmentsResponseProcessorInterface;
use Symfony\Component\HttpKernel\Event\ResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
/**
* Response subscriber to handle HTML responses.
*/
class HtmlResponseSubscriber implements EventSubscriberInterface {
/**
* The HTML response attachments processor service.
*
* @var \Drupal\Core\Render\AttachmentsResponseProcessorInterface
*/
protected $htmlResponseAttachmentsProcessor;
/**
* Constructs a HtmlResponseSubscriber object.
*
* @param \Drupal\Core\Render\AttachmentsResponseProcessorInterface $html_response_attachments_processor
* The HTML response attachments processor service.
*/
public function __construct(AttachmentsResponseProcessorInterface $html_response_attachments_processor) {
$this->htmlResponseAttachmentsProcessor = $html_response_attachments_processor;
}
/**
* Processes attachments for HtmlResponse responses.
*
* @param \Symfony\Component\HttpKernel\Event\ResponseEvent $event
* The event to process.
*/
public function onRespond(ResponseEvent $event) {
$response = $event->getResponse();
if (!$response instanceof HtmlResponse) {
return;
}
$event->setResponse($this->htmlResponseAttachmentsProcessor->processAttachments($response));
}
/**
* {@inheritdoc}
*/
public static function getSubscribedEvents(): array {
$events[KernelEvents::RESPONSE][] = ['onRespond'];
return $events;
}
}
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