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<?php |
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/* |
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* This file is part of the FOSHttpCache package. |
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* |
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* (c) FriendsOfSymfony <http://friendsofsymfony.github.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 FOS\HttpCache\SymfonyCache; |
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use Symfony\Component\HttpFoundation\Response; |
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use Symfony\Component\OptionsResolver\OptionsResolver; |
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/** |
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* Purge handler for the symfony built-in HttpCache. |
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* |
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* @author David Buchmann <[email protected]> |
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* |
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* {@inheritdoc} |
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*/ |
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class PurgeListener extends AccessControlledListener |
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{ |
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const DEFAULT_PURGE_METHOD = 'PURGE'; |
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/** |
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* The purge method to use. |
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* |
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* @var string |
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*/ |
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private $purgeMethod; |
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/** |
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* When creating the purge listener, you can configure an additional option. |
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* |
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* - purge_method: HTTP method that identifies purge requests. |
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* |
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* @param array $options Options to overwrite the default options |
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* |
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* @throws \InvalidArgumentException if unknown keys are found in $options |
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* |
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* @see AccessControlledListener::__construct |
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*/ |
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public function __construct(array $options = []) |
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{ |
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parent::__construct($options); |
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$this->purgeMethod = $this->getOptionsResolver()->resolve($options)['purge_method']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public static function getSubscribedEvents() |
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{ |
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return [ |
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Events::PRE_INVALIDATE => 'handlePurge', |
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]; |
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} |
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/** |
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* Look at unsafe requests and handle purge requests. |
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* |
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* Prevents access when the request comes from a non-authorized client. |
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* |
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* @param CacheEvent $event |
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*/ |
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public function handlePurge(CacheEvent $event) |
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{ |
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$request = $event->getRequest(); |
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if ($this->purgeMethod !== $request->getMethod()) { |
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return; |
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} |
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if (!$this->isRequestAllowed($request)) { |
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$event->setResponse(new Response('', 400)); |
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return; |
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} |
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// because symfony cache respects the scheme when caching and purging, we need to invalidate both variants |
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$uri = $request->getUri(); |
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$uri2 = 0 === strpos($uri, 'https://') |
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? preg_replace('https', 'http', $uri, 1) |
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: preg_replace('http', 'https', $uri, 1); |
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$store = $event->getKernel()->getStore(); |
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$response = new Response(); |
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2 |
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if ($store->purge($uri) |
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|| $store->purge($uri2) |
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) { |
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$response->setStatusCode(200, 'Purged'); |
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} else { |
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$response->setStatusCode(200, 'Not found'); |
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} |
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$event->setResponse($response); |
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} |
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/** |
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* Add the purge_method option. |
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* |
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* @return OptionsResolver |
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*/ |
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protected function getOptionsResolver() |
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{ |
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$resolver = parent::getOptionsResolver(); |
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$resolver->setDefault('purge_method', static::DEFAULT_PURGE_METHOD); |
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$resolver->setAllowedTypes('purge_method', 'string'); |
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return $resolver; |
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} |
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} |
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FriendsOfSymfony /
FOSHttpCache
