Version 1

[yaffs-website] / vendor / symfony / http-kernel / HttpCache / Ssi.php

diff --git a/vendor/symfony/http-kernel/HttpCache/Ssi.php b/vendor/symfony/http-kernel/HttpCache/Ssi.php
new file mode 100644 (file)
index 0000000..5f7ee10
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+++ b/vendor/symfony/http-kernel/HttpCache/Ssi.php
@@ -0,0 +1,194 @@
+<?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\HttpCache;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
+
+/**
+ * Ssi implements the SSI capabilities to Request and Response instances.
+ *
+ * @author Sebastian Krebs <krebs.seb@gmail.com>
+ */
+class Ssi implements SurrogateInterface
+{
+    private $contentTypes;
+    private $phpEscapeMap = array(
+        array('<?', '<%', '<s', '<S'),
+        array('<?php echo "<?"; ?>', '<?php echo "<%"; ?>', '<?php echo "<s"; ?>', '<?php echo "<S"; ?>'),
+    );
+
+    /**
+     * Constructor.
+     *
+     * @param array $contentTypes An array of content-type that should be parsed for SSI information
+     *                            (default: text/html, text/xml, application/xhtml+xml, and application/xml)
+     */
+    public function __construct(array $contentTypes = array('text/html', 'text/xml', 'application/xhtml+xml', 'application/xml'))
+    {
+        $this->contentTypes = $contentTypes;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'ssi';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function createCacheStrategy()
+    {
+        return new ResponseCacheStrategy();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasSurrogateCapability(Request $request)
+    {
+        if (null === $value = $request->headers->get('Surrogate-Capability')) {
+            return false;
+        }
+
+        return false !== strpos($value, 'SSI/1.0');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addSurrogateCapability(Request $request)
+    {
+        $current = $request->headers->get('Surrogate-Capability');
+        $new = 'symfony2="SSI/1.0"';
+
+        $request->headers->set('Surrogate-Capability', $current ? $current.', '.$new : $new);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addSurrogateControl(Response $response)
+    {
+        if (false !== strpos($response->getContent(), '<!--#include')) {
+            $response->headers->set('Surrogate-Control', 'content="SSI/1.0"');
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function needsParsing(Response $response)
+    {
+        if (!$control = $response->headers->get('Surrogate-Control')) {
+            return false;
+        }
+
+        return (bool) preg_match('#content="[^"]*SSI/1.0[^"]*"#', $control);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function renderIncludeTag($uri, $alt = null, $ignoreErrors = true, $comment = '')
+    {
+        return sprintf('<!--#include virtual="%s" -->', $uri);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(Request $request, Response $response)
+    {
+        $type = $response->headers->get('Content-Type');
+        if (empty($type)) {
+            $type = 'text/html';
+        }
+
+        $parts = explode(';', $type);
+        if (!in_array($parts[0], $this->contentTypes)) {
+            return $response;
+        }
+
+        // we don't use a proper XML parser here as we can have SSI tags in a plain text response
+        $content = $response->getContent();
+
+        $chunks = preg_split('#<!--\#include\s+(.*?)\s*-->#', $content, -1, PREG_SPLIT_DELIM_CAPTURE);
+        $chunks[0] = str_replace($this->phpEscapeMap[0], $this->phpEscapeMap[1], $chunks[0]);
+
+        $i = 1;
+        while (isset($chunks[$i])) {
+            $options = array();
+            preg_match_all('/(virtual)="([^"]*?)"/', $chunks[$i], $matches, PREG_SET_ORDER);
+            foreach ($matches as $set) {
+                $options[$set[1]] = $set[2];
+            }
+
+            if (!isset($options['virtual'])) {
+                throw new \RuntimeException('Unable to process an SSI tag without a "virtual" attribute.');
+            }
+
+            $chunks[$i] = sprintf('<?php echo $this->surrogate->handle($this, %s, \'\', false) ?>'."\n",
+                var_export($options['virtual'], true)
+            );
+            ++$i;
+            $chunks[$i] = str_replace($this->phpEscapeMap[0], $this->phpEscapeMap[1], $chunks[$i]);
+            ++$i;
+        }
+        $content = implode('', $chunks);
+
+        $response->setContent($content);
+        $response->headers->set('X-Body-Eval', 'SSI');
+
+        // remove SSI/1.0 from the Surrogate-Control header
+        if ($response->headers->has('Surrogate-Control')) {
+            $value = $response->headers->get('Surrogate-Control');
+            if ('content="SSI/1.0"' == $value) {
+                $response->headers->remove('Surrogate-Control');
+            } elseif (preg_match('#,\s*content="SSI/1.0"#', $value)) {
+                $response->headers->set('Surrogate-Control', preg_replace('#,\s*content="SSI/1.0"#', '', $value));
+            } elseif (preg_match('#content="SSI/1.0",\s*#', $value)) {
+                $response->headers->set('Surrogate-Control', preg_replace('#content="SSI/1.0",\s*#', '', $value));
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function handle(HttpCache $cache, $uri, $alt, $ignoreErrors)
+    {
+        $subRequest = Request::create($uri, 'get', array(), $cache->getRequest()->cookies->all(), array(), $cache->getRequest()->server->all());
+
+        try {
+            $response = $cache->handle($subRequest, HttpKernelInterface::SUB_REQUEST, true);
+
+            if (!$response->isSuccessful()) {
+                throw new \RuntimeException(sprintf('Error when rendering "%s" (Status code is %s).', $subRequest->getUri(), $response->getStatusCode()));
+            }
+
+            return $response->getContent();
+        } catch (\Exception $e) {
+            if ($alt) {
+                return $this->handle($cache, $alt, '', $ignoreErrors);
+            }
+
+            if (!$ignoreErrors) {
+                throw $e;
+            }
+        }
+    }
+}