public function onKernelRequest(GetResponseEvent $event)
{
if (!$event->getRequest()->headers->has('link')) {
return;
}
$links = array();
$header = $event->getRequest()->headers->get('link');
/*
* Due to limitations, multiple same-name headers are sent as comma
* separated values.
*
* This breaks those headers into Link headers following the format
* http://tools.ietf.org/html/rfc2068#section-19.6.2.4
*/
while (preg_match('/^((?:[^"]|"[^"]*")*?),/', $header, $matches)) {
$header = trim(substr($header, strlen($matches[0])));
$links[] = $matches[1];
}
if ($header) {
$links[] = $header;
}
$requestMethod = $this->urlMatcher->getContext()->getMethod();
// The controller resolver needs a request to resolve the controller.
$stubRequest = new Request();
foreach ($links as $idx => $link) {
// Force the GET method to avoid the use of the
// previous method (LINK/UNLINK)
$this->urlMatcher->getContext()->setMethod('GET');
$linkParams = explode(';', trim($link));
$resourceType = null;
if (count($linkParams) > 1) {
$resourceType = trim(preg_replace('/<|>/', '', $linkParams[1]));
$resourceType = str_replace("\"", "", str_replace("rel=", "", $resourceType));
}
$resource = array_shift($linkParams);
$resource = preg_replace('/<|>/', '', $resource);
$tempRequest = Request::create($resource);
try {
$route = $this->urlMatcher->match($tempRequest->getRequestUri());
} catch (\Exception $e) {
// If we don't have a matching route we return the original Link header
continue;
}
if (strpos($route['_route'], 'newscoop_gimme_') === false) {
return;
}
$stubRequest->attributes->replace($route);
$stubRequest->server = $event->getRequest()->server;
if (false === ($controller = $this->resolver->getController($stubRequest))) {
continue;
}
$subEvent = new FilterControllerEvent($event->getKernel(), $controller, $stubRequest, HttpKernelInterface::SUB_REQUEST);
$kernelSubEvent = new GetResponseEvent($event->getKernel(), $stubRequest, HttpKernelInterface::SUB_REQUEST);
$event->getDispatcher()->dispatch(KernelEvents::REQUEST, $kernelSubEvent);
$event->getDispatcher()->dispatch(KernelEvents::CONTROLLER, $subEvent);
$controller = $subEvent->getController();
$arguments = $this->resolver->getArguments($stubRequest, $controller);
try {
$result = call_user_func_array($controller, $arguments);
// Our api returns objects for single resources
if (!is_object($result)) {
continue;
}
$links[$idx] = array('object' => $result, 'resourceType' => $resourceType);
} catch (\Exception $e) {
$links[$idx] = array('object' => $e, 'resourceType' => 'exception');
continue;
}
}
$event->getRequest()->attributes->set('links', $links);
$this->urlMatcher->getContext()->setMethod($requestMethod);
}
