Google integation in windows phone 8.1[RT] application

Question

I am working with windows phone 8.1 application and I want to login with Google Plus , for that I have create Client id and Client secret from Google

 string uri = string.Format("{0}?response_type=code&client_id={1}&redirect_uri={2}&scope={3}&approval_prompt=force",
            authEndpoint,
            clientId,
            "urn:ietf:wg:oauth:2.0:oob",
            scope);
 webBrowser.Navigate(new Uri(uri, UriKind.Absolute));

and I Got string something like 4/BGIl1Na3TQJlAD8SQ7blvHyONJ_Jyav8COHa7tIrAdo

I want User Email and Name from account for signup or login Please help me for that. Thank you

Answer 1

I'm not an expert.

It looks like you need to request the email scope:

https://developers.google.com/+/web/api/rest/oauth#login-scopes

as well as (probably) the profile scope (same page).

If this isn't helpful, please edit your question and show more of your code (obscuring your secret API key, etc.).

Answer 2

Implement the interafce IWebAuthenticationContinuable to your class and then under ContinueWebAuthentication() Method use this code :

var authData = GetGoogleSuccessCode(args.WebAuthenticationResult.ResponseData); 
var userData = await GetTokenAndUserInfo(authData);

private string GetGoogleSuccessCode(string data)
        {
            if (string.IsNullOrEmpty(data)) return null;
            var parts = data.Split('&')[0].Split('=');
            for (int i = 0; i < parts.Length; ++i)
            {
                if (parts[i] == "Success code")
                {
                    return parts[i + 1];
                }
            }
            return null;
        }

public async Task<string> GetTokenAndUserInfo(string code)
        {
            var client = new HttpClient();
            var auth = await client.PostAsync("https://accounts.google.com/o/oauth2/token", new FormUrlEncodedContent(new[]
                {
                    new KeyValuePair<string, string>("code", code),
                    new KeyValuePair<string, string>("client_id",Constants.GoogleAppId), 
                    new KeyValuePair<string, string>("client_secret",Constants.GoogleAppSecret), 
                    new KeyValuePair<string, string>("grant_type","authorization_code"),
                    new KeyValuePair<string, string>("redirect_uri","urn:ietf:wg:oauth:2.0:oob"),  
                }));

            var data = await auth.Content.ReadAsStringAsync();
            var j = JToken.Parse(data);
            var token = j.SelectToken("access_token");
            var searchUrl = "https://www.googleapis.com/oauth2/v2/userinfo";
            client.DefaultRequestHeaders.Add("Authorization", "Bearer " + token.ToString());
            HttpResponseMessage res = await client.GetAsync(searchUrl);
            string content = await res.Content.ReadAsStringAsync();
            return content;
        }

And add following code in App.xaml.cs file:

public static ContinuationManager ContinuationManager { get; private set; }


 public App()
{
    ContinuationManager = new ContinuationManager();
}

private void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
#if WINDOWS_PHONE_APP
            ContinuationManager.MarkAsStale();
#endif
            // TODO: Save application state and stop any background activity
            deferral.Complete();
        }

protected override void OnActivated(IActivatedEventArgs args)
        {
#if WINDOWS_PHONE_APP
            if (args.Kind == ActivationKind.WebAuthenticationBrokerContinuation)
            {
                var continuationEventArgs = args as IContinuationActivatedEventArgs;
                if (continuationEventArgs != null)
                {
                    ContinuationManager.Continue(continuationEventArgs);
                    ContinuationManager.MarkAsStale();
                }

            }
#endif
        }

Don't forget to include Continuation Manager class file in your project. You will get the user info.

Answer 3

I have also searched for sign in using facebook and google in WIN RT Apps and finally found solution from this link : Web authentication broker sample

Maybe it will help you also.