class ProtocolVersionCacheContext

Defines the ProtocolVersionCacheContext service, for "per protocol" caching.

Useful to differentiate between HTTP/1.1 and HTTP/2.0 responses for example, to allow responses to be optimized for protocol-specific characteristics.

Cache context ID: 'protocol_version'.

Hierarchy

• class \Drupal\Core\Cache\Context\RequestStackCacheContextBase
  • class \Drupal\Core\Cache\Context\ProtocolVersionCacheContext extends \Drupal\Core\Cache\Context\RequestStackCacheContextBase implements \Drupal\Core\Cache\Context\CacheContextInterface

Expanded class hierarchy of ProtocolVersionCacheContext

File

core/lib/Drupal/Core/Cache/Context/ProtocolVersionCacheContext.php, line 15

Namespace

class ProtocolVersionCacheContext extends RequestStackCacheContextBase implements CacheContextInterface {
    
    /**
     * {@inheritdoc}
     */
    public static function getLabel() {
        return t('Protocol version');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContext() {
        return $this->requestStack
            ->getCurrentRequest()
            ->getProtocolVersion();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheableMetadata() {
        return new CacheableMetadata();
    }

}

Members