Better error handling

Author: wonglkd

src/CUMSA/Raven/Http/Controllers/RavenController.php

@@ -32,6 +32,9 @@ public function redirectToProvider() {
      */
     public function handleProviderCallback() {
         $user = $this->raven->user();
+        if (is_null($user)) {
+            return redirect('/')->with('message', 'Login cancelled');
+        }
 
         $authUser = $this->findOrCreateUser($user);
         Auth::login($authUser, true);

src/CUMSA/Raven/RavenAuth.php

@@ -18,7 +18,9 @@ public function redirect() {
     public function user() {
         $ret = $this->webauth->callback();
         if (!$ret || !$this->webauth->success()) {
-            throw new Exception('UCamWebAuth: ' . $this->webauth->status() . $this->webauth->msg());
+            if (!in_array($this->webauth->status(), ['410'])) {
+                throw new Exception('UCamWebAuth: ' . $this->webauth->status() . $this->webauth->msg());
+            }
         } else {
             return new RavenUser($this->webauth->principal());
         }