public void Auth()
{
var clientId = "588035480561-9viuq54cpc427jefm8qh4c9d46guhl4d.apps.googleusercontent.com";
var scope = "profile";
var authorizeUrl = new Uri("https://accounts.google.com/o/oauth2/auth");
var redirectUrl = new Uri("http://localhost");
var auth = new Xamarin.Auth.OAuth2Authenticator(clientId, scope, authorizeUrl, redirectUrl);
auth.Completed += (sender, eventArgs) => {
if (eventArgs.IsAuthenticated)
{
var requestAddress = authorizeUrl.AbsolutePath + "?client_id=" + clientId + "&redirect_url=" + redirectUrl.AbsolutePath
+ "&response_type=code";
var requestUrl = new Uri(requestAddress);
var request = new OAuth2Request("GET", requestUrl, null, eventArgs.Account);
request.GetResponseAsync().ContinueWith(t =>
{
if (t.IsFaulted)
{
var s = t.Status;
}
else
{
var json = t.Result.GetResponseText();
}
});
}
else
{
var s = scope;
}
};
auth.Error += (sender, eventArgs) =>
{
var s = sender;
};
}
void Facebook_Clicked(object sender, System.EventArgs e)
{
authenticator
= new Xamarin.Auth.OAuth2Authenticator
(
clientId:
new Func <string>
(
() =>
{
string retval_client_id = "oops something is wrong!";
retval_client_id = fb_app_id;
return(retval_client_id);
}
).Invoke(),
authorizeUrl:
new Func <Uri>
(
() =>
{
string uri = null;
if (native_ui)
{
uri = "https://www.facebook.com/v2.9/dialog/oauth";
}
else
{
// old
uri = "https://m.facebook.com/dialog/oauth/";
}
return(new Uri(uri));
}
).Invoke(),
redirectUrl:
new Func <Uri>
(
() =>
{
string uri = null;
if (native_ui)
{
uri =
$"fb{fb_app_id}://authorize"
;
}
else
{
uri =
$"fb{fb_app_id}://authorize"
;
}
return(new Uri(uri));
}
).Invoke(),
scope: "", // "basic", "email",
getUsernameAsync: null,
isUsingNativeUI: native_ui
)
{
AllowCancel = true,
};
authenticator.Completed +=
(s, ea) =>
{
StringBuilder sb = new StringBuilder();
if (ea.Account != null && ea.Account.Properties != null)
{
sb.Append("Token = ").AppendLine($"{ea.Account.Properties["access_token"]}");
}
else
{
sb.Append("Not authenticated ").AppendLine($"Account.Properties does not exist");
}
Navigation.PushAsync(new DashBoardPage());
return;
};
authenticator.Error +=
(s, ea) =>
{
StringBuilder sb = new StringBuilder();
sb.Append("Error = ").AppendLine($"{ea.Message}");
DisplayAlert
(
"Authentication Error",
sb.ToString(),
"OK"
);
return;
};
// after initialization (creation and event subscribing) exposing local object
AuthenticationState.Authenticator = authenticator;
PresentUILoginScreen(authenticator);
return;
}