CODEWITHSUNDEEP
google-apidartfluttergoogle-oauth
Jean G
Jean G

Reputation: 167

Google authenticated HTTP client with dart

I have have run the examples from https://github.com/dart-lang/googleapis_examples/blob/master/drive_upload_download_console/bin/main.dart.

The example creates an authenticated HTTP client for accessing Google Drive API with: 

import 'package:googleapis_auth/auth_io.dart' as auth;
…
…  

auth.clientViaUserConsent(identifier, scopes, userPrompt).then((client) {   // with client_id, client_secret, scope
  var api = new drive.DriveApi(client);
…
…
}

When I run the example I have to give the User consent in a web browser each time I run the example above.

I want to create an authenticated HTTP client without having to use the user consent fonction (auth.clientViaUserConsent) but with a stored acces token or the refresh token. How can I create such an authenticated HTTP client? With the googleapis_auth package?(https://pub.dartlang.org/packages/googleapis_auth)

Upvotes: 0

Views: 942

Answers (1)

aknoefel
aknoefel

Reputation: 123

You are already there.

Your client object contains all you need already.

Here is your modified code using the stored credentials to inquire about freeBusy time:

auth.clientViaUserConsent(identifier, scopes, userPrompt).then((client) {   // with client_id, client_secret, scope
  var api = new drive.DriveApi(client);
  debugPrint(' access token: ' + client.credentials.accessToken.data +' refresh token ' + client.credentials.refreshToken);
  // store the tokens in the apps key store 
}

At some time in the future make a new call to obtain new access credentials from the never expiring refresh token, and create a new client for your purposes.

    AccessCredentials _fromStorage = AccessCredentials(client.credentials.accessToken, 
    client.credentials.refreshToken, _scopes );

    var _newClient = new http.Client();
    AccessCredentials _accessCredentials = await refreshCredentials( _clientID, _fromStorage , _newClient);
    _newClient = authenticatedClient(_newClient, _accessCredentials);
    // the code below was just for me to test this out with my API scopes. replace with your code

    var calendar = cal.CalendarApi(_newClient);
    String calendarId = "---some string---";
    cal.FreeBusyRequest _request = cal.FreeBusyRequest.fromJson(
        {
          'items': [
            {'id': calendarId, 'busy': 'Active'}
          ],
          'timeMin': (new DateTime(2020, 11, 17)).toIso8601String()+'Z',
          'timeMax': (new DateTime(2020, 11, 19)).toIso8601String()+'Z'
        });
      debugPrint('request: ' + _request.toJson().toString());
      cal.FreeBusyResponse response = await calendar.freebusy.query(_request);
      debugPrint(response.toJson().toString());
    });

Upvotes: 1

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