DynamicPageCacheSubscriber::onRouteMatch

public DynamicPageCacheSubscriber::onRouteMatch(GetResponseEvent $event)

public function onRouteMatch(GetResponseEvent $event) {
  // Don't cache the response if the Dynamic Page Cache request policies are
  // not met. Store the result in a static keyed by current request, so that
  // onResponse() does not have to redo the request policy check.
  $request = $event->getRequest();
  $request_policy_result = $this->requestPolicy->check($request);
  $this->requestPolicyResults[$request] = $request_policy_result;
  if ($request_policy_result === RequestPolicyInterface::DENY) {
    return;
  }

  // Sets the response for the current route, if cached.
  $cached = $this->renderCache->get($this->dynamicPageCacheRedirectRenderArray);
  if ($cached) {
    $response = $this->renderArrayToResponse($cached);
    $response->headers->set(self::HEADER, 'HIT');
    $event->setResponse($response);
  }
}