/**
* Handles a request to either validate a user login or log a user out.
*
* The path that this controller/action handle are always set to the "service"
* when authenticating with the CAS server, so CAS server communicates back to
* the Drupal site using this controller.
*/
public function handle()
{
$request = $this->requestStack->getCurrentRequest();
// First, check if this is a single-log-out (SLO) request from the server.
if ($request->request->has('logoutRequest')) {
$this->casHelper->log("Logout request: passing to casLogout::handleSlo");
$this->casLogout->handleSlo($request->request->get('logoutRequest'));
// Always return a 200 code. CAS Server doesn’t care either way what
// happens here, since it is a fire-and-forget approach taken.
return Response::create('', 200);
}
// Our CAS Subscriber, which implements forced redirect and gateway, will
// set this query string param which indicates we should disable the
// subscriber on the next redirect. This prevents an infinite redirect loop.
if ($request->query->has('cas_temp_disable')) {
$this->casHelper->log("Temp disable flag set, set session flag.");
$_SESSION['cas_temp_disable'] = TRUE;
}
// Check if there is a ticket parameter. If there isn't, we could be
// returning from a gateway request and the user may not be logged into CAS.
// Just redirect away from here.
if (!$request->query->has('ticket')) {
$this->casHelper->log("No ticket detected, move along.");
$this->handleReturnToParameter($request);
return RedirectResponse::create($this->urlGenerator->generate('<front>'));
}
$ticket = $request->query->get('ticket');
// Our CAS service will need to reconstruct the original service URL
// when validating the ticket. We always know what the base URL for
// the service URL (it's this page), but there may be some query params
// attached as well (like a destination param) that we need to pass in
// as well. So, detach the ticket param, and pass the rest off.
$service_params = $request->query->all();
unset($service_params['ticket']);
$cas_version = $this->casHelper->getCasProtocolVersion();
$this->casHelper->log("Configured to use CAS protocol version: {$cas_version}");
try {
$cas_validation_info = $this->casValidator->validateTicket($cas_version, $ticket, $service_params);
} catch (CasValidateException $e) {
// Validation failed, redirect to homepage and set message.
$this->setMessage(t('There was a problem validating your login, please contact a site administrator.'), 'error');
$this->handleReturnToParameter($request);
return RedirectResponse::create($this->urlGenerator->generate('<front>'));
}
try {
$this->casLogin->loginToDrupal($cas_validation_info, $ticket);
if ($this->casHelper->isProxy() && $cas_validation_info->getPgt()) {
$this->casHelper->log("Storing PGT information for this session.");
$this->casHelper->storePGTSession($cas_validation_info->getPgt());
}
$this->setMessage(t('You have been logged in.'));
} catch (CasLoginException $e) {
$this->setMessage(t('There was a problem logging in, please contact a site administrator.'), 'error');
}
$this->handleReturnToParameter($request);
return RedirectResponse::create($this->urlGenerator->generate('<front>'));
}
