I'm currently begining to work with Xamarin.Auth and I'm facing 2 problems for which I'm stuck since 1 day and half..
I have this piece of code :
public class OAuth
{
private Account account;
private AccountStore store;
// These values do not need changing
public string Scope;
public string AuthorizeUrl;
public string AccessTokenUrl;
public string UserInfoUrl;
string clientId;
string redirectUri;
private Func<JObject, User> OAuthParser;
private Action<User> OnCompleted;
private Action<string> OnError;
public OAuth()
{
account = null;
store = null;
Scope = "";
AuthorizeUrl = "";
AccessTokenUrl = "";
UserInfoUrl = "";
clientId = "";
redirectUri = "";
}
public OAuth Facebook()
{
// These values do not need changing
Scope = "public_profile";
AuthorizeUrl = "https://m.facebook.com/dialog/oauth/";
AccessTokenUrl = "";
UserInfoUrl = "";
switch (Device.RuntimePlatform)
{
case Device.iOS:
clientId = "<insert IOS client ID here>";
redirectUri = "<insert IOS redirect URL here>:/oauth2redirect";
break;
case Device.Android:
clientId = "206316176526191";
redirectUri = "http://www.facebook.com/connect/login_success.html";
break;
}
OAuthParser = ParseFacebookResponse;
return this;
}
public OAuth GooglePlus()
{
// These values do not need changing
Scope = "https://www.googleapis.com/auth/userinfo.email";
AuthorizeUrl = "https://accounts.google.com/o/oauth2/auth";
AccessTokenUrl = "https://www.googleapis.com/oauth2/v4/token";
UserInfoUrl = "https://www.googleapis.com/oauth2/v2/userinfo";
switch (Device.RuntimePlatform)
{
case Device.iOS:
clientId = "<insert IOS client ID here>";
redirectUri = "<insert IOS redirect URL here>:/oauth2redirect";
break;
case Device.Android:
clientId = "548539660999-muighch5brcrbae8r53js0ggdad5jt45.apps.googleusercontent.com";
redirectUri = "com.googleusercontent.apps.548539660999-muighch5brcrbae8r53js0ggdad5jt45:/oauth2redirect";
break;
}
OAuthParser = ParseGooglePlusResponse;
return this;
}
public OAuth2Authenticator Authenticator(Action<User> onCompleted, Action<string> onError)
{
OAuth2Authenticator authenticator = new OAuth2Authenticator(
clientId,
null,
Scope,
new Uri(AuthorizeUrl),
new Uri(redirectUri),
new Uri(AccessTokenUrl),
null,
false);
authenticator.Completed += OnAuthCompleted;
authenticator.Error += OnAuthError;
OnCompleted = onCompleted;
OnError = onError;
return authenticator;
}
private async void OnAuthCompleted(object sender, AuthenticatorCompletedEventArgs e)
{
OAuth2Authenticator OAuth2Authenticator = sender as OAuth2Authenticator;
if (OAuth2Authenticator != null)
{
OAuth2Authenticator.Completed -= OnAuthCompleted;
OAuth2Authenticator.Error -= OnAuthError;
}
//User user = null;
if (e.IsAuthenticated)
{
// If the user is authenticated, request their basic user data from Google
// UserInfoUrl = https://www.googleapis.com/oauth2/v2/userinfo
var request = new OAuth2Request("GET", new Uri(UserInfoUrl), null, e.Account);
var response = await request.GetResponseAsync();
if (response != null)
{
// Deserialize the data and store it in the account store
// The users email address will be used to identify data in SimpleDB
string str = await response.GetResponseTextAsync();
JObject jobject = JObject.Parse(str);
User user = OAuthParser(jobject);
OnCompleted(user);
}
if (account != null)
{
store.Delete(account, App.AppName);
}
await store.SaveAsync(account = e.Account, App.AppName);
}
}
private void OnAuthError(object sender, AuthenticatorErrorEventArgs e)
{
OAuth2Authenticator OAuth2Authenticator = sender as OAuth2Authenticator;
if (OAuth2Authenticator != null)
{
OAuth2Authenticator.Completed -= OnAuthCompleted;
OAuth2Authenticator.Error -= OnAuthError;
}
OnError("Authentication error: " + e.Message);
}
private static User ParseGooglePlusResponse(JObject jobject)
{
try
{
User user = new User()
{
Email = jobject["email"].ToString(),
Pseudo = jobject["name"].ToString(),
Firstname = jobject["given_name"].ToString(),
Surname = jobject["family_name"].ToString(),
Image = jobject["picture"].ToString(),
Password = "girafe"
};
return user;
}
catch (Exception e)
{ Debug.WriteLine(e.ToString()); }
return null;
}
private static User ParseFacebookResponse(JObject jobject)
{
try
{
Debug.WriteLine(jobject);
User user = new User()
{
Email = jobject["email"].ToString(),
Pseudo = jobject["name"].ToString(),
Firstname = jobject["given_name"].ToString(),
Surname = jobject["family_name"].ToString(),
Image = jobject["picture"].ToString(),
Password = "girafe"
};
return user;
}
catch (Exception e)
{ Debug.WriteLine(e.ToString()); }
return null;
}
}
So, I'm using this class like that:
private void FacebookAuthConnection()
{
AuthenticationState.Authenticator = OAuthService.Facebook().Authenticator(OAuthLoginCompleted, OAuthLoginError);
Presenter.Login(AuthenticationState.Authenticator);
}
However, the problems are coming.. First, GooglePlus works, but I got an alert on my android phone that says "Chrome Custom Tabs Doesn't Close ...", so the application crashes with an empty stack trace... I searched on the web and the only thing I got is to turn false the last parameter of new OAuth2Authenticator();, which doesn't work since google doesn't allow it from a webview...
So I was like, ok my code works, I get the user infos blablabla, let's try with facebook if it works from the native browser. However, I can't find the parameters URL...
Scope = "";
AuthorizeUrl = "";
AccessTokenUrl = "";
UserInfoUrl = "";
- Scope seems to be
public_profile - AuthorizationUrl would be
https://m.facebook.com/dialog/oauth/
But what about the 2 others? I have them for Google+.
I'm really stuck and I feel like, each new seconds that passes, I get more and more frustrated...
Thank !
Edit
My actual values :
Scope = "email";
AuthorizeUrl = "https://www.facebook.com/v2.8/dialog/oauth";
AccessTokenUrl = "https://graph.facebook.com/oauth/access_token";
UserInfoUrl = "https://graph.facebook.com/me?fields=email,name,gender,picture\"";
clientId = "XXXX";
redirectUri = "http://www.facebook.com/connect/login_success.html";
