Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\HttpKernel\HttpCache;
Chris@0: 
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: use Symfony\Component\HttpFoundation\Response;
Chris@0: 
Chris@0: /**
Chris@0:  * Ssi implements the SSI capabilities to Request and Response instances.
Chris@0:  *
Chris@0:  * @author Sebastian Krebs <krebs.seb@gmail.com>
Chris@0:  */
Chris@0: class Ssi extends AbstractSurrogate
Chris@0: {
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getName()
Chris@0:     {
Chris@0:         return 'ssi';
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function addSurrogateControl(Response $response)
Chris@0:     {
Chris@0:         if (false !== strpos($response->getContent(), '<!--#include')) {
Chris@0:             $response->headers->set('Surrogate-Control', 'content="SSI/1.0"');
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function renderIncludeTag($uri, $alt = null, $ignoreErrors = true, $comment = '')
Chris@0:     {
Chris@0:         return sprintf('<!--#include virtual="%s" -->', $uri);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function process(Request $request, Response $response)
Chris@0:     {
Chris@0:         $type = $response->headers->get('Content-Type');
Chris@0:         if (empty($type)) {
Chris@0:             $type = 'text/html';
Chris@0:         }
Chris@0: 
Chris@0:         $parts = explode(';', $type);
Chris@17:         if (!\in_array($parts[0], $this->contentTypes)) {
Chris@0:             return $response;
Chris@0:         }
Chris@0: 
Chris@0:         // we don't use a proper XML parser here as we can have SSI tags in a plain text response
Chris@0:         $content = $response->getContent();
Chris@0: 
Chris@0:         $chunks = preg_split('#<!--\#include\s+(.*?)\s*-->#', $content, -1, PREG_SPLIT_DELIM_CAPTURE);
Chris@0:         $chunks[0] = str_replace($this->phpEscapeMap[0], $this->phpEscapeMap[1], $chunks[0]);
Chris@0: 
Chris@0:         $i = 1;
Chris@0:         while (isset($chunks[$i])) {
Chris@17:             $options = [];
Chris@0:             preg_match_all('/(virtual)="([^"]*?)"/', $chunks[$i], $matches, PREG_SET_ORDER);
Chris@0:             foreach ($matches as $set) {
Chris@0:                 $options[$set[1]] = $set[2];
Chris@0:             }
Chris@0: 
Chris@0:             if (!isset($options['virtual'])) {
Chris@0:                 throw new \RuntimeException('Unable to process an SSI tag without a "virtual" attribute.');
Chris@0:             }
Chris@0: 
Chris@0:             $chunks[$i] = sprintf('<?php echo $this->surrogate->handle($this, %s, \'\', false) ?>'."\n",
Chris@0:                 var_export($options['virtual'], true)
Chris@0:             );
Chris@0:             ++$i;
Chris@0:             $chunks[$i] = str_replace($this->phpEscapeMap[0], $this->phpEscapeMap[1], $chunks[$i]);
Chris@0:             ++$i;
Chris@0:         }
Chris@0:         $content = implode('', $chunks);
Chris@0: 
Chris@0:         $response->setContent($content);
Chris@0:         $response->headers->set('X-Body-Eval', 'SSI');
Chris@0: 
Chris@0:         // remove SSI/1.0 from the Surrogate-Control header
Chris@0:         $this->removeFromControl($response);
Chris@0:     }
Chris@0: }