facebook - Laravel 5 geting InvalidStateException in AbstractProvider.php

Question

I am trying to use login with facebook in laravel 5 using Socialize.

Here is my route file code.

Route::get('fb', function ($facebook = "facebook")
{
    $provider = Socialize::with($facebook);      
    if (Input::has('code'))
    {
        $user = $provider->user();
        return var_dump($user);
    } else {
        return $provider->scopes(['public_profile','user_friends'])->redirect();
    }
});

login is success and I get the code but time of get $provider->user() I get the error.

InvalidStateException in AbstractProvider.php line 161

Answer 1

I wasn't comfortable with just commenting out code that signalled an error (as in @Dipesh Shihora's answer), so I dug a little further. I discovered that the error is caused (in my case at least) by a problem with sessions.

My dev server is set up according to the instructions given in this answer. Basically, I am "spoofing" Google by using a callback URL which looks like a publicly-accessible address.

The InvalidStateException problem was appearing for me because I was visiting my login page at http://localhost/login and redirecting to Google's login page, which then returned me to http://myapp.example.com/callback. The problem is that the session key is stored in a cookie - it was originally a cookie for http://localhost, but when I redirected to a different URL, the cookie (and hence the session key) was inaccessible. Thus, the session state value was non-existent after the update and the exception was thrown.

The solution? Ensure that all my browsing on the dev machine was done at http://myapp.example.com and not at http://localhost.