EsiListener adds a Surrogate-Control HTTP header when the Response needs to be parsed for ESI.
@author Fabien Potencier <fabien@symfony.com>
Expanded class hierarchy of EsiListener
class EsiListener implements EventSubscriberInterface {
private $esi;
/**
* Constructor.
*
* @param Esi $esi An ESI instance
*/
public function __construct(Esi $esi = null) {
$this->esi = $esi;
}
/**
* Filters the Response.
*
* @param FilterResponseEvent $event A FilterResponseEvent instance
*/
public function onKernelResponse(FilterResponseEvent $event) {
if (HttpKernelInterface::MASTER_REQUEST !== $event
->getRequestType() || null === $this->esi) {
return;
}
$this->esi
->addSurrogateControl($event
->getResponse());
}
public static function getSubscribedEvents() {
return array(
KernelEvents::RESPONSE => 'onKernelResponse',
);
}
}
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
EsiListener:: |
private | property | ||
EsiListener:: |
public static | function |
Returns an array of event names this subscriber wants to listen to. Overrides EventSubscriberInterface:: |
|
EsiListener:: |
public | function | Filters the Response. | |
EsiListener:: |
public | function | Constructor. |