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<?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\Fragment; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\HttpKernel\Controller\ControllerReference; use Symfony\Component\HttpKernel\HttpCache\SurrogateInterface; use Symfony\Component\HttpKernel\UriSigner; /** * Implements Surrogate rendering strategy. * * @author Fabien Potencier <fabien@symfony.com> */ abstract class AbstractSurrogateFragmentRenderer extends RoutableFragmentRenderer { private $surrogate; private $inlineStrategy; private $signer; /** * Constructor. * * The "fallback" strategy when surrogate is not available should always be an * instance of InlineFragmentRenderer. * * @param SurrogateInterface $surrogate An Surrogate instance * @param FragmentRendererInterface $inlineStrategy The inline strategy to use when the surrogate is not supported * @param UriSigner $signer */ public function __construct(SurrogateInterface $surrogate = null, FragmentRendererInterface $inlineStrategy, UriSigner $signer = null) { $this->surrogate = $surrogate; $this->inlineStrategy = $inlineStrategy; $this->signer = $signer; } /** * {@inheritdoc} * * Note that if the current Request has no surrogate capability, this method * falls back to use the inline rendering strategy. * * Additional available options: * * * alt: an alternative URI to render in case of an error * * comment: a comment to add when returning the surrogate tag * * Note, that not all surrogate strategies support all options. For now * 'alt' and 'comment' are only supported by ESI. * * @see Symfony\Component\HttpKernel\HttpCache\SurrogateInterface */ public function render($uri, Request $request, array $options = array()) { if (!$this->surrogate || !$this->surrogate->hasSurrogateCapability($request)) { return $this->inlineStrategy->render($uri, $request, $options); } if ($uri instanceof ControllerReference) { $uri = $this->generateSignedFragmentUri($uri, $request); } $alt = isset($options['alt']) ? $options['alt'] : null; if ($alt instanceof ControllerReference) { $alt = $this->generateSignedFragmentUri($alt, $request); } $tag = $this->surrogate->renderIncludeTag($uri, $alt, isset($options['ignore_errors']) ? $options['ignore_errors'] : false, isset($options['comment']) ? $options['comment'] : ''); return new Response($tag); } private function generateSignedFragmentUri($uri, Request $request) { if (null === $this->signer) { throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.'); } // we need to sign the absolute URI, but want to return the path only. $fragmentUri = $this->signer->sign($this->generateFragmentUri($uri, $request, true)); return substr($fragmentUri, strlen($request->getSchemeAndHttpHost())); } }