aleph1.co.uk Git - yaffs-website/blob - web/modules/contrib/http2_server_push/src/Render/HtmlResponseAttachmentsProcessor.php

   1 <?php
   2
   3 namespace Drupal\http2_server_push\Render;
   4
   5 use Drupal\Core\Render\AttachmentsInterface;
   6 use Drupal\Core\Render\AttachmentsResponseProcessorInterface;
   7 use Symfony\Component\HttpFoundation\RequestStack;
   8
   9 /**
  10  * Decorates the HTML response attachments processor service, adds Server Push.
  11  *
  12  * @see \Drupal\http2_server_push\Asset\CssCollectionRenderer
  13  * @see \Drupal\http2_server_push\Asset\JsCollectionRenderer
  14  */
  15 class HtmlResponseAttachmentsProcessor implements AttachmentsResponseProcessorInterface {
  16
  17   /**
  18    * The decorated HTML response attachments processor service.
  19    *
  20    * @var \Drupal\Core\Render\AttachmentsResponseProcessorInterface
  21    */
  22   protected $htmlResponseAttachmentsProcessor;
  23
  24   /**
  25    * The request stack.
  26    *
  27    * @var \Symfony\Component\HttpFoundation\RequestStack
  28    */
  29   protected $requestStack;
  30
  31   /**
  32    * Constructs a HtmlResponseAttachmentsProcessor object.
  33    *
  34    * @param \Drupal\Core\Render\AttachmentsResponseProcessorInterface $html_response_attachments_processor
  35    *   The decorated HTML response attachments processor service.
  36    * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
  37    *   The request stack.
  38    */
  39   public function __construct(AttachmentsResponseProcessorInterface $html_response_attachments_processor, RequestStack $request_stack) {
  40     $this->htmlResponseAttachmentsProcessor = $html_response_attachments_processor;
  41     $this->requestStack = $request_stack;
  42   }
  43
  44   /**
  45    * {@inheritdoc}
  46    */
  47   public function processAttachments(AttachmentsInterface $response) {
  48     $response = $this->htmlResponseAttachmentsProcessor->processAttachments($response);
  49
  50     $request = $this->requestStack->getCurrentRequest();
  51     if ($request->attributes->has('http2_server_push_link_headers')) {
  52       $link_headers = $request->attributes->get('http2_server_push_link_headers');
  53       $response->headers->set('Link', $link_headers, FALSE);
  54     }
  55
  56     return $response;
  57   }
  58
  59 }