/**
* Filter and mark incoming requests
*
* @priority high
*
* @param ProxyRequestEvent $event
*/
public function onProxyRequest(ProxyRequestEvent $event)
{
if (!$event->isCancelled() && !$event->hasResponse()) {
$response = null;
$request = $event->getRequest();
$config = $event->getProxy()->getConfig();
if ($this->isSelfRequest($request, $config)) {
$event->setIsCancelled();
$event->getLogger()->warning(sprintf('Proxy server made a call to itself that cannot be handled, request will be cancelled'));
} elseif (in_array($request->getHost(), $config->getHostsOnPort($request->getPort()))) {
// display proxy welcome page as it is a direct hit
$response = new Response($this->getResource('home.html', $event->getProxy()), 200);
} elseif (!$this->firewall->isAllowed($request)) {
$event->setIsCancelled();
$event->getLogger()->debug(sprintf('Request was cancelled as it was not allowed by a firewall'));
}
if ($response) {
$event->setResponse($response);
}
}
}
/**
*
* @priority normal
* @param ProxyRequestEvent $event
*
* @throws \Exception
*/
public function onProxyRequest(ProxyRequestEvent $event)
{
if (!$event->isCancelled() && !$event->hasResponse()) {
$response = $this->storage->fetch($event->getRequest());
$request = $event->getRequest();
if ($this->cacheStrategy->canUseResponseFromCache($request, $response)) {
/**
* The "Date" header field represents the date and time at which the message was originated
* http://tools.ietf.org/html/rfc7231#section-7.1.1.2
*/
$event->getLogger()->debug('Response was read from cache');
$response->addHeader('X-Cache', 'HIT');
$response->addHeader('X-Cache-Hits', 1);
$now = new \DateTime('now');
$oldAge = $response->getHeader('Age', 0);
$oldAge = $oldAge[0];
$response->setHeader('Age', $oldAge + ($now->getTimestamp() - $response->getDate()->getTimestamp()));
$event->setResponse($response);
}
}
}