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Файл: gapps/vendor/symfony/http-kernel/HttpCache/Ssi.php
Строк: 233
<?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 SymfonyComponentHttpKernelHttpCache;

use 
SymfonyComponentHttpFoundationRequest;
use 
SymfonyComponentHttpFoundationResponse;
use 
SymfonyComponentHttpKernelHttpKernelInterface;

/**
 * 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 $requestResponse $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();

        
$chunks preg_split('#<!--#includes+(.*?)s*-->#'$content, -1PREG_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], $matchesPREG_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 $cache->handle($subRequestHttpKernelInterface::SUB_REQUESTtrue);

            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;
            }
        }
    }
}
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