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