/**
* Forwards the Request to the backend and returns the Response.
*
* @param Requset $request A Request instance
* @param Boolean $raw Whether to catch exceptions or not
* @param Response $response A Response instance (the stale entry if present, null otherwise)
*
* @return Response A Response instance
*/
protected function forward(Request $request, $raw = false, Response $entry = null)
{
if (!$this->kernel->isBooted()) {
$this->kernel->boot();
}
$this->kernel->getContainer()->set('cache', $this);
$this->kernel->getContainer()->set('esi', $this->esi);
return parent::forward($request, $raw, $entry);
}
/**
* Handles an ESI from the cache.
*
* @param Cache $cache A Cache instance
* @param string $uri The main URI
* @param string $alt An alternative URI
* @param Boolean $ignoreErrors Whether to ignore errors or not
*/
public function handle(Cache $cache, $uri, $alt, $ignoreErrors)
{
$subRequest = Request::create($uri, 'get', array(), $cache->getRequest()->cookies->all(), array(), $cache->getRequest()->server->all());
try {
$response = $cache->handle($subRequest, HttpKernelInterface::SUB_REQUEST, true);
if (200 != $response->getStatusCode()) {
throw new \RuntimeException(sprintf('Error when rendering "%s" (Status code is %s).', $subRequest->getUri(), $response->getStatusCode()));
}
return $response->getContent();
} catch (\Exception $e) {
if ($alt) {
return $this->handle($cache, $alt, '', $ignoreErrors);
}
if (!$ignoreErrors) {
throw $e;
}
}
}
