通过使用google_sign_in Flutter刷新令牌来获取新令牌

问题描述

我正在编写一个从Flutter调用google fit rest api的应用程序.

I'm writing an application that call google fit rest api from Flutter.

我需要使用( https://pub.dev/packages/google_sign_in 与Google签名..我可以毫无问题地获得令牌(请参阅)，但是如何在过期后获取新令牌?

I need to sign with google using (https://pub.dev/packages/google_sign_in).I can obtain a token without problem (see Did anyone manage to get the id token from google sign in (Flutter)) but how to obtain a new token when it is expired?

我不想让用户每小时登录并获取一个新令牌

I dont' want to ask to the user to login and obtain a new token every hour

推荐答案

您可以通过两种方式进行此操作.

You can do this in 2 ways.

1. 您可以使用 API .

我不知道这是否是标准设置，但是您可以在用户每次打开应用程序时执行 silent登录，静默日志无需用户交互即可登录到用户帐户中您拥有新令牌的方式.像这样:

I don't know if this is standard but you can do a silent login every time the user opens the app, the silent log logs into the user account without user interaction and this way you have a new token. Like this:

Future<String> refreshToken() async {
    print("Token Refresh");
    final GoogleSignInAccount googleSignInAccount =
        await googleSignIn.signInSilently();
    final GoogleSignInAuthentication googleSignInAuthentication =
        await googleSignInAccount.authentication;

    final AuthCredential credential = GoogleAuthProvider.getCredential(
      accessToken: googleSignInAuthentication.accessToken,
      idToken: googleSignInAuthentication.idToken,
    );
    final AuthResult authResult = await auth.signInWithCredential(credential);

    return googleSignInAuthentication.accessToken; // New refreshed token
  }

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