Mercurial > hg > isophonics-drupal-site
view core/lib/Drupal/Core/EventSubscriber/HtmlResponsePlaceholderStrategySubscriber.php @ 13:5fb285c0d0e3
Update Drupal core to 8.4.7 via Composer. Security update; I *think* we've
been lucky to get away with this so far, as we don't support self-registration
which seems to be used by the so-called "drupalgeddon 2" attack that 8.4.5
was vulnerable to.
author | Chris Cannam |
---|---|
date | Mon, 23 Apr 2018 09:33:26 +0100 |
parents | 4c8ae668cc8c |
children |
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<?php namespace Drupal\Core\EventSubscriber; use Drupal\Core\Render\HtmlResponse; use Drupal\Core\Render\Placeholder\PlaceholderStrategyInterface; use Symfony\Component\HttpKernel\Event\FilterResponseEvent; use Symfony\Component\HttpKernel\KernelEvents; use Symfony\Component\EventDispatcher\EventSubscriberInterface; /** * HTML response subscriber to allow for different placeholder strategies. * * This allows core and contrib to coordinate how to render placeholders; * e.g. an EsiRenderStrategy could replace the placeholders with ESI tags, * while e.g. a BigPipeRenderStrategy could store the placeholders in a * BigPipe service and render them after the main content has been sent to * the client. */ class HtmlResponsePlaceholderStrategySubscriber implements EventSubscriberInterface { /** * The placeholder strategy to use. * * @var \Drupal\Core\Render\Placeholder\PlaceholderStrategyInterface */ protected $placeholderStrategy; /** * Constructs a HtmlResponsePlaceholderStrategySubscriber object. * * @param \Drupal\Core\Render\Placeholder\PlaceholderStrategyInterface $placeholder_strategy * The placeholder strategy to use. */ public function __construct(PlaceholderStrategyInterface $placeholder_strategy) { $this->placeholderStrategy = $placeholder_strategy; } /** * Processes placeholders for HTML responses. * * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event * The event to process. */ public function onRespond(FilterResponseEvent $event) { $response = $event->getResponse(); if (!$response instanceof HtmlResponse) { return; } $attachments = $response->getAttachments(); if (empty($attachments['placeholders'])) { return; } $attachments['placeholders'] = $this->placeholderStrategy->processPlaceholders($attachments['placeholders']); $response->setAttachments($attachments); } /** * {@inheritdoc} */ public static function getSubscribedEvents() { // Run shortly before HtmlResponseSubscriber. $events[KernelEvents::RESPONSE][] = ['onRespond', 5]; return $events; } }