[英]How to get accesstoken from Xamarin Auth - Google
I am trying to get auth token from 0auth2 in the android app.我正在尝试从 android 应用程序中的 0auth2 获取身份验证令牌。 The issue is once i sign, in the app is restaring because of the redirect url but I am not getting any auth token from the intent once the app is restarted.
问题是一旦我签名,应用程序就会因为重定向 url 而重新启动,但是一旦应用程序重新启动,我就没有从意图中获得任何身份验证令牌。
code代码
var authenticator = new OAuth2Authenticator(ClientID, ClientSecret, Scope, new Uri("https://accounts.google.com/o/oauth2/auth"),
new Uri("com.app.abcd:/oauthredirect"), new Uri("https://oauth2.googleapis.com/token"), null, true);
authenticator.Completed += OnAuthCompleted;
authenticator.Error += OnAuthError;
var presenter = new Xamarin.Auth.Presenters.OAuthLoginPresenter();
presenter.Login(authenticator);
private async void OnAuthCompleted(object sender, AuthenticatorCompletedEventArgs e)
{
var authenticator = sender as OAuth2Authenticator;
if (authenticator != null)
{
authenticator.Completed -= OnAuthCompleted;
authenticator.Error -= OnAuthError;
}
IsAuthorized = e.IsAuthenticated;
//User user = null;
if (e.IsAuthenticated)
{}
}
Android安卓
[Activity(Label = "ABCD", MainLauncher = true, LaunchMode = LaunchMode.SingleTask, ConfigurationChanges = ConfigChanges.ScreenSize, ScreenOrientation = ScreenOrientation.Portrait)]
[IntentFilter(new[] { Intent.ActionView },
Categories = new[] { Intent.CategoryBrowsable, Intent.CategoryDefault },
//DataScheme = "abcd",
DataSchemes = new[] { "com.app.abcd" },
DataPath = "/oauthredirect",
AutoVerify = true)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
base.SetTheme(Resource.Style.MainTheme);
base.OnCreate(bundle);
DependencyService.Register<ChromeCustomTabsBrowser>();
CrossCurrentActivity.Current.Activity = this;
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
global::Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
}
protected override void OnNewIntent(Intent intent)
{
base.OnNewIntent(intent);
//HandleNotificationIntent(intent);
}
protected override void OnRestart()
{
var intent = this.Intent;
base.OnRestart();
}
}
When i run this code and presenter.Login(authenticator);
当我运行此代码和
presenter.Login(authenticator);
is called i can see the google authenticates the user and OnNewIntent
is called and app is restarted and OnAuthCompleted
is never called and I am not able to get the access token.被调用时,我可以看到 google 对用户进行了身份验证,并
OnNewIntent
并重新启动了应用程序,并且从未调用过OnAuthCompleted
并且我无法获取访问令牌。
Is this the right way to get accesstoken form 0auth2 or am i missing something?这是从 0auth2 获取访问令牌的正确方法还是我遗漏了什么? can anyone help me with this.
谁能帮我这个。
I found the solution.我找到了解决方案。 Check out the example here .
在此处查看示例。
Common Code :通用代码:
private void Authenticate()
{
var authenticator = new OAuth2Authenticator(ClientID, ClientSecret, Scope, new Uri("https://accounts.google.com/o/oauth2/auth"),
new Uri("com.app.abcd:/oauthredirect"), new Uri("https://oauth2.googleapis.com/token"), null, true);
authenticator.Completed += OnAuthCompleted;
authenticator.Error += OnAuthError;
var presenter = new Xamarin.Auth.Presenters.OAuthLoginPresenter();
presenter.Login(authenticator);
}
private async void OnAuthCompleted(object sender, AuthenticatorCompletedEventArgs e)
{
var authenticator = sender as OAuth2Authenticator;
if (authenticator != null)
{
authenticator.Completed -= OnAuthCompleted;
authenticator.Error -= OnAuthError;
}
IsAuthorized = e.IsAuthenticated;
//User user = null;
if (e.IsAuthenticated)
{
var access_token = e.Account.Properties["access_token"];
var expires_in = e.Account.Properties["expires_in"];
var refresh_token = e.Account.Properties["refresh_token"];
}
}
ANDROID : Create a new activity: ANDROID :创建一个新活动:
[Activity(Label = "ActivityCustomUrlSchemeInterceptor", NoHistory = true, LaunchMode = LaunchMode.SingleTop)]
[IntentFilter(
new[] { Intent.ActionView },
Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable },
DataSchemes = new[] { "com.app.abcd" },
DataPath = "/oauthredirect")]
public class ActivityCustomUrlSchemeInterceptor : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
global::Android.Net.Uri uri_android = Intent.Data;
// Convert Android.Net.Url to Uri
var uri = new Uri(uri_android.ToString());
// Close browser
var intent = new Intent(this, typeof(MainActivity));
//intent.SetFlags(ActivityFlags.ClearTop | ActivityFlags.SingleTop);
StartActivity(intent);
// Load redirectUrl page
// if the code below isn't accessible, pass `authenticator`
// created in the common code here which has `OnPageLoading(uri);` method
OAuthAuthenticatorHelper.AuthenticationState.OnPageLoading(uri);
this.Finish();
}
}
iOS IOS
Add couple of lines in OpenUrl
to handle the url redirect在
OpenUrl
添加几行来处理 url 重定向
public override bool OpenUrl(UIApplication application, NSUrl url, string sourceApplication, NSObject annotation)
{
// Convert iOS NSUrl to C#/netxf/BCL System.Uri - common API
Uri uri_netfx = new Uri(url.AbsoluteString);
// load redirect_url Page for parsing
OAuthAuthenticatorHelper.AuthenticationState.OnPageLoading(uri_netfx);
return true;
}
In info.plist add the urlscheme of the package name:在 info.plist 中添加包名的 urlscheme:
<key>CFBundleURLSchemes</key>
<array>
<string>com.app.abcd</string>
</array>
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