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SurrogateInterface.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\HttpKernel\HttpCache;
013
014 use Symfony\Component\HttpFoundation\Request;
015 use Symfony\Component\HttpFoundation\Response;
016
017 interface SurrogateInterface
018 {
019 /**
020 * Returns surrogate name.
021 *
022 * @return string
023 */
024 public function getName();
025
026 /**
027 * Returns a new cache strategy instance.
028 *
029 * @return ResponseCacheStrategyInterface A ResponseCacheStrategyInterface instance
030 */
031 public function createCacheStrategy();
032
033 /**
034 * Checks that at least one surrogate has Surrogate capability.
035 *
036 * @param Request $request A Request instance
037 *
038 * @return bool true if one surrogate has Surrogate capability, false otherwise
039 */
040 public function hasSurrogateCapability(Request $request);
041
042 /**
043 * Adds Surrogate-capability to the given Request.
044 *
045 * @param Request $request A Request instance
046 */
047 public function addSurrogateCapability(Request $request);
048
049 /**
050 * Adds HTTP headers to specify that the Response needs to be parsed for Surrogate.
051 *
052 * This method only adds an Surrogate HTTP header if the Response has some Surrogate tags.
053 *
054 * @param Response $response A Response instance
055 */
056 public function addSurrogateControl(Response $response);
057
058 /**
059 * Checks that the Response needs to be parsed for Surrogate tags.
060 *
061 * @param Response $response A Response instance
062 *
063 * @return bool true if the Response needs to be parsed, false otherwise
064 */
065 public function needsParsing(Response $response);
066
067 /**
068 * Renders a Surrogate tag.
069 *
070 * @param string $uri A URI
071 * @param string $alt An alternate URI
072 * @param bool $ignoreErrors Whether to ignore errors or not
073 * @param string $comment A comment to add as an esi:include tag
074 *
075 * @return string
076 */
077 public function renderIncludeTag($uri, $alt = null, $ignoreErrors = true, $comment = '');
078
079 /**
080 * Replaces a Response Surrogate tags with the included resource content.
081 *
082 * @param Request $request A Request instance
083 * @param Response $response A Response instance
084 *
085 * @return Response
086 */
087 public function process(Request $request, Response $response);
088
089 /**
090 * Handles a Surrogate from the cache.
091 *
092 * @param HttpCache $cache An HttpCache instance
093 * @param string $uri The main URI
094 * @param string $alt An alternative URI
095 * @param bool $ignoreErrors Whether to ignore errors or not
096 *
097 * @return string
098 *
099 * @throws \RuntimeException
100 * @throws \Exception
101 */
102 public function handle(HttpCache $cache, $uri, $alt, $ignoreErrors);
103 }
104