Google/Facebook login not working with Windows Phone 8.1

Question

I have a Azure Mobile Services backend which supports Google and Facebook authentication for my mobile app. This works without problems for my Windows 8.1 and also for a new Windows Phone Silverlight 8.1 app.

When I try the same login code with a new Windows Phone 8.1 app, the LoginAsync() method never returns and a login is not possible.

Is this a known issue? I'm using the Mobile Services v.1.2.1 library for all three clients.

The simple login code looks like this:

private async void Login_OnClick(object sender, RoutedEventArgs e)
{
    try
    {
        var mobileService = new MobileServiceClient("https://xxx.azure-mobile.net/", "xxx");
        var user = await mobileService.LoginAsync(MobileServiceAuthenticationProvider.Facebook);
        loggedInStatus.Text = "Logged in! " + user.UserId;
    }
    catch (Exception)
    {
        loggedInStatus.Text = "not logged in!";
    }
}

Any help appreciated. :)

Best regards
Stefan

Answer 1

Hi Stefan,

For Windows Phone 8.1 devices there is a new step in the login process you need to do.  In your app.xaml.cs, OnActivated add the following if block:

if (args.Kind == ActivationKind.WebAuthenticationBrokerContinuation)
{
  App.MobileService.LoginComplete(args as WebAuthenticationBrokerContinuationEventArgs);
}

Where MobileService is your MobileServiceClient reference.  We'll work on getting a blog post and documentation up on this new step soon.

Answer 2

Hi Phillip

Many thanks for your fast reply. I don't really understand, why this difference only exists for Phone 8.1 apps, but as long as it's working, it's fine for me. :)

Regards
Stefan

Answer 3

I had a similar problema, that was the solution, this really need to be in a more public document.