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Файл: vendor/symfony/http-kernel/HttpCache/AbstractSurrogate.php
Строк: 195
<?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;

/**
 * Abstract class implementing Surrogate capabilities to Request and Response instances.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Robin Chalas <robin.chalas@gmail.com>
 */
abstract class AbstractSurrogate implements SurrogateInterface
{
    protected 
$contentTypes;

    
/**
     * @deprecated since Symfony 6.3
     */
    
protected $phpEscapeMap = [
        [
'<?''<%''<s''<S'],
        [
'<?php echo "<?"; ?>''<?php echo "<%"; ?>''<?php echo "<s"; ?>''<?php echo "<S"; ?>'],
    ];

    
/**
     * @param array $contentTypes An array of content-type that should be parsed for Surrogate information
     *                            (default: text/html, text/xml, application/xhtml+xml, and application/xml)
     */
    
public function __construct(array $contentTypes = ['text/html''text/xml''application/xhtml+xml''application/xml'])
    {
        
$this->contentTypes $contentTypes;
    }

    
/**
     * Returns a new cache strategy instance.
     */
    
public function createCacheStrategy(): ResponseCacheStrategyInterface
    
{
        return new 
ResponseCacheStrategy();
    }

    public function 
hasSurrogateCapability(Request $request): bool
    
{
        if (
null === $value $request->headers->get('Surrogate-Capability')) {
            return 
false;
        }

        return 
str_contains($valuesprintf('%s/1.0'strtoupper($this->getName())));
    }

    
/**
     * @return void
     */
    
public function addSurrogateCapability(Request $request)
    {
        
$current $request->headers->get('Surrogate-Capability');
        
$new sprintf('symfony="%s/1.0"'strtoupper($this->getName()));

        
$request->headers->set('Surrogate-Capability'$current $current.', '.$new $new);
    }

    public function 
needsParsing(Response $response): bool
    
{
        if (!
$control $response->headers->get('Surrogate-Control')) {
            return 
false;
        }

        
$pattern sprintf('#content="[^"]*%s/1.0[^"]*"#'strtoupper($this->getName()));

        return (bool) 
preg_match($pattern$control);
    }

    public function 
handle(HttpCache $cachestring $uristring $altbool $ignoreErrors): string
    
{
        
$subRequest Request::create($uriRequest::METHOD_GET, [], $cache->getRequest()->cookies->all(), [], $cache->getRequest()->server->all());

        try {
            
$response $cache->handle($subRequestHttpKernelInterface::SUB_REQUESTtrue);

            if (!
$response->isSuccessful() && Response::HTTP_NOT_MODIFIED !== $response->getStatusCode()) {
                throw new 
RuntimeException(sprintf('Error when rendering "%s" (Status code is %d).'$subRequest->getUri(), $response->getStatusCode()));
            }

            return 
$response->getContent();
        } catch (
Exception $e) {
            if (
$alt) {
                return 
$this->handle($cache$alt''$ignoreErrors);
            }

            if (!
$ignoreErrors) {
                throw 
$e;
            }
        }

        return 
'';
    }

    
/**
     * Remove the Surrogate from the Surrogate-Control header.
     *
     * @return void
     */
    
protected function removeFromControl(Response $response)
    {
        if (!
$response->headers->has('Surrogate-Control')) {
            return;
        }

        
$value $response->headers->get('Surrogate-Control');
        
$upperName strtoupper($this->getName());

        if (
sprintf('content="%s/1.0"'$upperName) == $value) {
            
$response->headers->remove('Surrogate-Control');
        } elseif (
preg_match(sprintf('#,s*content="%s/1.0"#'$upperName), $value)) {
            
$response->headers->set('Surrogate-Control'preg_replace(sprintf('#,s*content="%s/1.0"#'$upperName), ''$value));
        } elseif (
preg_match(sprintf('#content="%s/1.0",s*#'$upperName), $value)) {
            
$response->headers->set('Surrogate-Control'preg_replace(sprintf('#content="%s/1.0",s*#'$upperName), ''$value));
        }
    }

    protected static function 
generateBodyEvalBoundary(): string
    
{
        static 
$cookie;
        
$cookie hash('xxh128'$cookie ?? $cookie random_bytes(16), true);
        
$boundary base64_encode($cookie);

        
assert(HttpCache::BODY_EVAL_BOUNDARY_LENGTH === strlen($boundary));

        return 
$boundary;
    }
}
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