/**
* Should be run before routes are executed
* Will abort if etag match is found
* @param Route $route
* @param Request $request
* @param Response|null $response
* @return Response|null
* @throws HttpException
*/
public function before(Route $route, Request $request, $response = null)
{
/**
* TODO implement other Request Methods
*/
if (!in_array($request->method(), ['GET', 'HEAD'])) {
return null;
}
if ($this->routecache->checkClientHasValidCache()) {
$response = new Response();
$response->setNotModified();
return $response;
}
$response = $this->routecache->getResponseFromCache();
if (empty($response)) {
$route->after('cache.after');
}
return $response;
}