/**
* Check if we should implement the CAS gateway feature.
*
* @param GetResponseEvent $event
* The response event from the kernel.
*
* @return bool
* TRUE if gateway mode was implemented, FALSE otherwise.
*/
private function handleGateway(GetResponseEvent $event)
{
// Only implement gateway feature for GET requests, to prevent users from
// being redirected to CAS server for things like form submissions.
if (!$this->requestStack->getCurrentRequest()->isMethod('GET')) {
return FALSE;
}
$config = $this->configFactory->get('cas.settings');
$check_frequency = $config->get('gateway.check_frequency');
if ($check_frequency === CasHelper::CHECK_NEVER) {
return FALSE;
}
// User can indicate specific paths to enable (or disable) gateway mode.
$condition = $this->conditionManager->createInstance('request_path');
$condition->setConfiguration($config->get('gateway.paths'));
if (!$this->conditionManager->execute($condition)) {
return FALSE;
}
// If set to only implement gateway once per session, we use a session
// variable to store the fact that we've already done the gateway check
// so we don't keep doing it.
if ($check_frequency === CasHelper::CHECK_ONCE) {
// If the session var is already set, we know to back out.
if (isset($_SESSION['cas_gateway_checked'])) {
$this->casHelper->log("Gateway already checked, will not check again.");
return FALSE;
}
$_SESSION['cas_gateway_checked'] = TRUE;
}
$cas_login_url = $this->casHelper->getServerLoginUrl(array('returnto' => $this->requestStack->getCurrentRequest()->getUri(), 'cas_temp_disable' => TRUE), TRUE);
$this->casHelper->log("Gateway activated, redirecting to {$cas_login_url}");
$event->setResponse(TrustedRedirectResponse::create($cas_login_url));
return TRUE;
}
