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\CacheContextInterface implements \Drupal\Core\Cache\Context\RequestStackCacheContextBase

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();
  }

}