Файл: vendor/symfony/http-kernel/HttpCache/AbstractSurrogate.php
Строк: 185
<?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
{
/**
* @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(
protected array $contentTypes = ['text/html', 'text/xml', 'application/xhtml+xml', 'application/xml'],
) {
}
/**
* Returns a new cache strategy instance.
*/
public function createCacheStrategy(): ResponseCacheStrategyInterface
{
return new ResponseCacheStrategy();
}
public function hasSurrogateCapability(Request $request): bool
{
if (null === $value = $request->headers->get('Surrogate-Capability')) {
return false;
}
return str_contains($value, sprintf('%s/1.0', strtoupper($this->getName())));
}
public function addSurrogateCapability(Request $request): void
{
$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 $cache, string $uri, string $alt, bool $ignoreErrors): string
{
$subRequest = Request::create($uri, 'GET', [], $cache->getRequest()->cookies->all(), [], $cache->getRequest()->server->all());
try {
$response = $cache->handle($subRequest, HttpKernelInterface::SUB_REQUEST, true);
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.
*/
protected function removeFromControl(Response $response): void
{
if (!$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;
}
}