function FinishResponseSubscriber::setResponseNotCacheable

Add Cache-Control and Expires headers to a response which is not cacheable.

Parameters

\Symfony\Component\HttpFoundation\Response $response: A response object.

\Symfony\Component\HttpFoundation\Request $request: A request object.

File

core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php, line 216

Class

FinishResponseSubscriber

Response subscriber to handle finished responses.

Namespace

Code

protected function setResponseNotCacheable(Response $response, Request $request) {
    $this->setCacheControlNoCache($response);
    $this->setExpiresNoCache($response);
    // There is no point in sending along headers necessary for cache
    // revalidation, if caching by proxies and browsers is denied in the first
    // place. Therefore remove ETag, Last-Modified and Vary in that case.
    $response->setEtag(NULL);
    $response->setLastModified(NULL);
    $response->headers
        ->remove('Vary');
}