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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\ProxyClient; |
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use FOS\HttpCache\ProxyClient\Invalidation\ClearCapable; |
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use FOS\HttpCache\ProxyClient\Invalidation\PurgeCapable; |
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use FOS\HttpCache\ProxyClient\Invalidation\RefreshCapable; |
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use FOS\HttpCache\ProxyClient\Invalidation\TagCapable; |
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use Symfony\Component\HttpFoundation\Request; |
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/** |
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* Fastly HTTP cache invalidator. |
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* |
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* Additional constructor options: |
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* - service_identifier Identifier for your Fastly service account. |
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* - authentication_token Token for authentication against Fastly APIs. |
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* For full capabilities (incl ClearCapable) you'll need one with Fastly Engineer permissions. |
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* - soft_purge Boolean for doing soft purges or not on tag invalidation and url purging, default true. |
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* Soft purges expires cache instead of hard purge, and allow grace/stale handling. |
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* |
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* @see https://docs.fastly.com/api/purge Fastly Purge API documentation. |
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* |
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* @author Simone Fumagalli <[email protected]> |
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*/ |
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class Fastly extends HttpProxyClient implements ClearCapable, PurgeCapable, RefreshCapable, TagCapable |
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{ |
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/** |
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* @internal |
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*/ |
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const HTTP_METHOD_PURGE = 'PURGE'; |
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/** |
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* @internal |
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* |
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* @see https://docs.fastly.com/api/purge#purge_db35b293f8a724717fcf25628d713583 Fastly's limit on batch tag purges. |
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*/ |
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const TAG_BATCH_PURGE_LIMIT = 256; |
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/** |
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* @internal |
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* |
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* @see https://docs.fastly.com/api/purge Base url endpoint used on anything but url PURGE/GET/HEAD. |
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*/ |
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const API_ENDPOINT = 'https://api.fastly.com'; |
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/** |
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* {@inheritdoc} |
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* |
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* @see https://docs.fastly.com/api/purge#purge_db35b293f8a724717fcf25628d713583 |
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*/ |
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public function invalidateTags(array $tags) |
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{ |
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$url = sprintf(self::API_ENDPOINT.'/service/%s/purge', $this->options['service_identifier']); |
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$headers = ['Accept' => 'application/json']; |
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if (true === $this->options['soft_purge']) { |
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$headers['Fastly-Soft-Purge'] = 1; |
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} |
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// Split tag invalidations across several requests within Fastly's tag batch invalidations limits. |
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foreach (\array_chunk($tags, self::TAG_BATCH_PURGE_LIMIT) as $tagChunk) { |
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$this->queueRequest( |
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Request::METHOD_POST, |
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$url, |
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$headers, |
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false, |
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json_encode(['surrogate_keys' => $tagChunk]) |
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); |
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} |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @see https://docs.fastly.com/api/purge#soft_purge_0c4f56f3d68e9bed44fb8b638b78ea36 |
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* @see https://docs.fastly.com/guides/purging/authenticating-api-purge-requests#purging-urls-with-an-api-token |
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*/ |
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public function purge($url, array $headers = []) |
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{ |
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if (true === $this->options['soft_purge']) { |
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$headers['Fastly-Soft-Purge'] = 1; |
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} |
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$this->queueRequest( |
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self::HTTP_METHOD_PURGE, |
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$url, |
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$headers, |
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false |
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); |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function refresh($url, array $headers = []) |
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{ |
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// First soft purge url |
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$this->queueRequest( |
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self::HTTP_METHOD_PURGE, |
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$url, |
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['Fastly-Soft-Purge' => 1] + $headers, |
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false |
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); |
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// Secondly make sure refresh is triggered with a HEAD request |
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$this->queueRequest( |
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Request::METHOD_HEAD, |
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$url, |
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$headers, |
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false |
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); |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @see https://docs.fastly.com/api/purge#purge_bee5ed1a0cfd541e8b9f970a44718546 |
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* |
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* Warning: |
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* - Does not support soft purge, for that use an "all" key. |
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* - Requires a API token of a user with at least Engineer permissions. |
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*/ |
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public function clear() |
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{ |
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$this->queueRequest( |
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Request::METHOD_POST, |
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sprintf(self::API_ENDPOINT.'/service/%s/purge_all', $this->options['service_identifier']), |
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['Accept' => 'application/json'], |
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false |
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); |
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return $this; |
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} |
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/** |
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* {@inheritdoc} Always provides default authentication token on "Fastly-Key" header. |
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*/ |
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protected function queueRequest($method, $url, array $headers, $validateHost = true, $body = null) |
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{ |
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parent::queueRequest( |
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$method, |
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$url, |
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$headers + ['Fastly-Key' => $this->options['authentication_token']], |
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$validateHost, |
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$body |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function configureOptions() |
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{ |
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$resolver = parent::configureOptions(); |
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$resolver->setRequired([ |
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'authentication_token', |
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'service_identifier', |
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'soft_purge', |
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]); |
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$resolver->setDefaults([ |
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'soft_purge' => true, |
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]); |
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return $resolver; |
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} |
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} |
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FriendsOfSymfony /
FOSHttpCache
