[google_sign_in and googleapis] Not able to access Google Drive API after updating Google Sign in to V7

[sagarehs]

Steps to reproduce

Hello Everyone, Not able to access Google Drive API after updating google_sign_in: ^7.1.1

Google Sing-in is working fine for me using firebase auth and google-service.json but there is one issue regarding to access google drive API in flutter app

when I login using v7 not able to read or write google drive file

API Key is restricted for Android using package and sha1

For you kind information File read and write is working fine with v6

Expected results

I want to read and write file with Google Drive using googleapis flutter package

Actual results

Got Error in Google Drive API

DetailedApiRequestError(status: 403, message: Method doesn't allow unregistered callers (callers without established identity). Please use API Key or other form of API consumer identity to call this API.)

Code sample

Code sample

  GoogleSignIn _googleSignIn = GoogleSignIn(scopes: [
    'https://www.googleapis.com/auth/drive.appdata',
    'https://www.googleapis.com/auth/drive.file'
  ]);

 @override
  void initState() {
    // TODO: implement initState
    super.initState();

    WidgetsBinding.instance.addObserver(this);
    _initializeGoogleSignIn();
  }

Future<void> _initializeGoogleSignIn() async {
    try {
      await _googleSignIn.initialize(serverClientId: '263300586130-0fjelbeit8a27e7pb3maauh1t9dcdrvc.apps.googleusercontent.com');
      _isGoogleSignInInitialized = true;
    } catch (e) {
      print('Failed to initialize Google Sign-In: $e');
    }
  }

  /// Always check Google sign in initialization before use
  Future<void> _ensureGoogleSignInInitialized() async {
    if (!_isGoogleSignInInitialized) {
      await _initializeGoogleSignIn();
    }
  }
  Future<GoogleSignInAccount> signInWithGoogle() async {
    await _ensureGoogleSignInInitialized();

    try {
      // authenticate() throws exceptions instead of returning null
      final GoogleSignInAccount account = await _googleSignIn.authenticate(
        scopeHint: ['email','https://www.googleapis.com/auth/drive.appdata','https://www.googleapis.com/auth/drive.file'],  // Specify required scopes
      );
      return account;
    } on GoogleSignInException catch (e) {
      print('Google Sign In error: code: ${e.code.name} description:${e.description} details:${e.details}');
      rethrow;
    } catch (error) {
      print('Unexpected Google Sign-In error: $error');
      rethrow;
    }
  }

//OnClick of Download File
      _currentUser = await signInWithGoogle();
      var client = GoogleHttpClient(await _currentUser!.authorizationClient.authorizationHeaders(['https://www.googleapis.com/auth/drive.appdata','https://www.googleapis.com/auth/drive.file']));
var _drive = v3.DriveApi(client);
      v3.FileList parentlist = new v3.FileList();
      v3.FileList csvFile = new v3.FileList();

class GoogleHttpClient extends IOClient {
  Map<String, String>? _headers;

  GoogleHttpClient(this._headers) : super();

  @override
  Future<IOStreamedResponse> send(http.BaseRequest request) {
    // TODO: implement send
    return super.send(request..headers.addAll(_headers!));
  }
}

[stuartmorgan-g]

Please see the documentation comment for authorizationHeaders; the code you have provided here is never requesting authorization, it is only returning existing authorization if it has already been requested. The expected behavior of the provided code is to send null headers with the API request, so the error is not surprising.

Closing as this is an error in the client code, not the plugin.

(In the future, when providing sample code, please provide a complete, compilable sample. The code here is partial, and part of it is for version 6.x of the plugin so can't be part of an actual 7.x repro case.)

[sagarehs]

@stuartmorgan-g Thanks for the quick response.

If possible, could you please share any documentation links or code examples for accessing the Google Drive API using Google Sign-In v7?
Alternatively, I’d really appreciate it if you could review my code and suggest improvements.

I’ve updated my code as follows, but I’m still encountering an error: "DetailedApiRequestError(status: 401, message: Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.)"

`
var client = GoogleHttpClient(await _currentUser!.authentication.idToken);

class GoogleHttpClient extends IOClient {
String? _headers;

GoogleHttpClient(this._headers) : super();

@OverRide
Future send(http.BaseRequest request) {
// TODO: implement send
if (_headers != null) {
request.headers.addIf(true, 'Authorization','Bearer $_headers');
}
return super.send(request);
}
}
`

[stuartmorgan-g]

If possible, could you please share any documentation links or code examples for accessing the Google Drive API using Google Sign-In v7?

The google_sign_in example app shows an example of correctly requesting authorization for scopes and then constructing headers from it.

Alternatively, I’d really appreciate it if you could review my code and suggest improvements.

The Flutter issue tracker is not a support forum for client code; if you have questions about your own code, a resource like Stack Overflow would be the place for that.

[github-actions]

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