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<?php |
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/* |
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* This file is part of the API Platform project. |
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* |
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* (c) Kévin Dunglas <[email protected]> |
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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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declare(strict_types=1); |
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namespace ApiPlatform\Core\HttpCache\EventListener; |
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use ApiPlatform\Core\Api\IriConverterInterface; |
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use ApiPlatform\Core\Util\RequestAttributesExtractor; |
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use Symfony\Component\HttpKernel\Event\FilterResponseEvent; |
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/** |
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* Sets the list of resources' IRIs included in this response in the "Cache-Tags" HTTP header. |
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* |
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* The "Cache-Tags" is used because it is supported by CloudFlare. |
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* |
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* @see https://support.cloudflare.com/hc/en-us/articles/206596608-How-to-Purge-Cache-Using-Cache-Tags-Enterprise-only- |
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* |
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* @author Kévin Dunglas <[email protected]> |
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* |
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* @experimental |
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*/ |
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final class AddTagsListener |
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{ |
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private $iriConverter; |
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public function __construct(IriConverterInterface $iriConverter) |
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{ |
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$this->iriConverter = $iriConverter; |
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} |
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/** |
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* Adds the "Cache-Tags" header. |
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* |
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* @param FilterResponseEvent $event |
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*/ |
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public function onKernelResponse(FilterResponseEvent $event) |
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{ |
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$request = $event->getRequest(); |
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$response = $event->getResponse(); |
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if ( |
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!$request->isMethodCacheable() |
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|| !$response->isCacheable() |
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|| (!$attributes = RequestAttributesExtractor::extractAttributes($request)) |
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|| !$resources = $request->attributes->get('_resources') |
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) { |
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return; |
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} |
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if (isset($attributes['collection_operation_name'])) { |
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// Allows to purge collections |
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$iri = $this->iriConverter->getIriFromResourceClass($attributes['resource_class']); |
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$resources[$iri] = $iri; |
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} |
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if (!$resources) { |
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return; |
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} |
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$event->getResponse()->headers->set('Cache-Tags', implode(',', $resources)); |
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} |
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} |
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api-platform /
core
