4 * This file is part of the Symfony package.
6 * (c) Fabien Potencier <fabien@symfony.com>
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Symfony\Component\HttpKernel\Fragment;
14 use Symfony\Component\HttpFoundation\Request;
15 use Symfony\Component\HttpFoundation\Response;
16 use Symfony\Component\HttpKernel\Controller\ControllerReference;
17 use Symfony\Component\HttpKernel\HttpCache\SurrogateInterface;
18 use Symfony\Component\HttpKernel\UriSigner;
21 * Implements Surrogate rendering strategy.
23 * @author Fabien Potencier <fabien@symfony.com>
25 abstract class AbstractSurrogateFragmentRenderer extends RoutableFragmentRenderer
28 private $inlineStrategy;
32 * The "fallback" strategy when surrogate is not available should always be an
33 * instance of InlineFragmentRenderer.
35 * @param SurrogateInterface $surrogate An Surrogate instance
36 * @param FragmentRendererInterface $inlineStrategy The inline strategy to use when the surrogate is not supported
37 * @param UriSigner $signer
39 public function __construct(SurrogateInterface $surrogate = null, FragmentRendererInterface $inlineStrategy, UriSigner $signer = null)
41 $this->surrogate = $surrogate;
42 $this->inlineStrategy = $inlineStrategy;
43 $this->signer = $signer;
49 * Note that if the current Request has no surrogate capability, this method
50 * falls back to use the inline rendering strategy.
52 * Additional available options:
54 * * alt: an alternative URI to render in case of an error
55 * * comment: a comment to add when returning the surrogate tag
57 * Note, that not all surrogate strategies support all options. For now
58 * 'alt' and 'comment' are only supported by ESI.
60 * @see Symfony\Component\HttpKernel\HttpCache\SurrogateInterface
62 public function render($uri, Request $request, array $options = array())
64 if (!$this->surrogate || !$this->surrogate->hasSurrogateCapability($request)) {
65 if ($uri instanceof ControllerReference && $this->containsNonScalars($uri->attributes)) {
66 @trigger_error('Passing non-scalar values as part of URI attributes to the ESI and SSI rendering strategies is deprecated since Symfony 3.1, and will be removed in 4.0. Use a different rendering strategy or pass scalar values.', E_USER_DEPRECATED);
69 return $this->inlineStrategy->render($uri, $request, $options);
72 if ($uri instanceof ControllerReference) {
73 $uri = $this->generateSignedFragmentUri($uri, $request);
76 $alt = isset($options['alt']) ? $options['alt'] : null;
77 if ($alt instanceof ControllerReference) {
78 $alt = $this->generateSignedFragmentUri($alt, $request);
81 $tag = $this->surrogate->renderIncludeTag($uri, $alt, isset($options['ignore_errors']) ? $options['ignore_errors'] : false, isset($options['comment']) ? $options['comment'] : '');
83 return new Response($tag);
86 private function generateSignedFragmentUri($uri, Request $request)
88 if (null === $this->signer) {
89 throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.');
92 // we need to sign the absolute URI, but want to return the path only.
93 $fragmentUri = $this->signer->sign($this->generateFragmentUri($uri, $request, true));
95 return substr($fragmentUri, strlen($request->getSchemeAndHttpHost()));
98 private function containsNonScalars(array $values)
100 foreach ($values as $value) {
101 if (is_array($value)) {
102 return $this->containsNonScalars($value);
103 } elseif (!is_scalar($value) && null !== $value) {