1 files changed, 112 insertions, 0 deletions
diff --git a/vendor/symfony/http-kernel/Fragment/AbstractSurrogateFragmentRenderer.php b/vendor/symfony/http-kernel/Fragment/AbstractSurrogateFragmentRenderer.php
new file mode 100644
index 0000000000..0d4d26b676
--- /dev/null
+++ b/vendor/symfony/http-kernel/Fragment/AbstractSurrogateFragmentRenderer.php
@@ -0,0 +1,112 @@
+<?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\Fragment;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Controller\ControllerReference;
+use Symfony\Component\HttpKernel\HttpCache\SurrogateInterface;
+use Symfony\Component\HttpKernel\UriSigner;
+
+/**
+ * Implements Surrogate rendering strategy.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class AbstractSurrogateFragmentRenderer extends RoutableFragmentRenderer
+{
+    private $surrogate;
+    private $inlineStrategy;
+    private $signer;
+
+    /**
+     * Constructor.
+     *
+     * The "fallback" strategy when surrogate is not available should always be an
+     * instance of InlineFragmentRenderer.
+     *
+     * @param SurrogateInterface        $surrogate      An Surrogate instance
+     * @param FragmentRendererInterface $inlineStrategy The inline strategy to use when the surrogate is not supported
+     * @param UriSigner                 $signer
+     */
+    public function __construct(SurrogateInterface $surrogate = null, FragmentRendererInterface $inlineStrategy, UriSigner $signer = null)
+    {
+        $this->surrogate = $surrogate;
+        $this->inlineStrategy = $inlineStrategy;
+        $this->signer = $signer;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * Note that if the current Request has no surrogate capability, this method
+     * falls back to use the inline rendering strategy.
+     *
+     * Additional available options:
+     *
+     *  * alt: an alternative URI to render in case of an error
+     *  * comment: a comment to add when returning the surrogate tag
+     *
+     * Note, that not all surrogate strategies support all options. For now
+     * 'alt' and 'comment' are only supported by ESI.
+     *
+     * @see Symfony\Component\HttpKernel\HttpCache\SurrogateInterface
+     */
+    public function render($uri, Request $request, array $options = array())
+    {
+        if (!$this->surrogate || !$this->surrogate->hasSurrogateCapability($request)) {
+            if ($uri instanceof ControllerReference && $this->containsNonScalars($uri->attributes)) {
+                @trigger_error('Passing non-scalar values as part of URI attributes to the ESI and SSI rendering strategies is deprecated since version 3.1, and will be removed in 4.0. Use a different rendering strategy or pass scalar values.', E_USER_DEPRECATED);
+            }
+
+            return $this->inlineStrategy->render($uri, $request, $options);
+        }
+
+        if ($uri instanceof ControllerReference) {
+            $uri = $this->generateSignedFragmentUri($uri, $request);
+        }
+
+        $alt = isset($options['alt']) ? $options['alt'] : null;
+        if ($alt instanceof ControllerReference) {
+            $alt = $this->generateSignedFragmentUri($alt, $request);
+        }
+
+        $tag = $this->surrogate->renderIncludeTag($uri, $alt, isset($options['ignore_errors']) ? $options['ignore_errors'] : false, isset($options['comment']) ? $options['comment'] : '');
+
+        return new Response($tag);
+    }
+
+    private function generateSignedFragmentUri($uri, Request $request)
+    {
+        if (null === $this->signer) {
+            throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.');
+        }
+
+        // we need to sign the absolute URI, but want to return the path only.
+        $fragmentUri = $this->signer->sign($this->generateFragmentUri($uri, $request, true));
+
+        return substr($fragmentUri, strlen($request->getSchemeAndHttpHost()));
+    }
+
+    private function containsNonScalars(array $values)
+    {
+        foreach ($values as $value) {
+            if (is_array($value) && $this->containsNonScalars($value)) {
+                return true;
+            } elseif (!is_scalar($value) && null !== $value) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}