Version 1

[yaffs-website] / vendor / symfony / http-kernel / EventListener / SurrogateListener.php

diff --git a/vendor/symfony/http-kernel/EventListener/SurrogateListener.php b/vendor/symfony/http-kernel/EventListener/SurrogateListener.php
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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\EventListener;
+
+use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
+use Symfony\Component\HttpKernel\HttpCache\SurrogateInterface;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * SurrogateListener adds a Surrogate-Control HTTP header when the Response needs to be parsed for Surrogates.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class SurrogateListener implements EventSubscriberInterface
+{
+    private $surrogate;
+
+    /**
+     * Constructor.
+     *
+     * @param SurrogateInterface $surrogate An SurrogateInterface instance
+     */
+    public function __construct(SurrogateInterface $surrogate = null)
+    {
+        $this->surrogate = $surrogate;
+    }
+
+    /**
+     * Filters the Response.
+     *
+     * @param FilterResponseEvent $event A FilterResponseEvent instance
+     */
+    public function onKernelResponse(FilterResponseEvent $event)
+    {
+        if (!$event->isMasterRequest() || null === $this->surrogate) {
+            return;
+        }
+
+        $this->surrogate->addSurrogateControl($event->getResponse());
+    }
+
+    public static function getSubscribedEvents()
+    {
+        return array(
+            KernelEvents::RESPONSE => 'onKernelResponse',
+        );
+    }
+}