Unhandled Exception: Bad state: Stream was already listened to

[avi8dev]

Hey there,

Hoping to get some help on the issue I'm facing. When trying to implement an OIDC connection I get an unhandled exception. The full error I'm getting:

[VERBOSE-2:ui_dart_state.cc(198)] Unhandled Exception: Bad state: Stream was already listened to
#0      _RawServerSocket.listen (dart:io-patch/socket_patch.dart:1726:7)
#1      new _ForwardingStreamSubscription (dart:async/stream_pipe.dart:114:10)
#2      _ForwardingStream._createSubscription (dart:async/stream_pipe.dart:86:16)
#3      _ForwardingStream.listen (dart:async/stream_pipe.dart:81:12)
#4      _ServerSocket.listen (dart:io-patch/socket_patch.dart:2004:71)
#5      _HttpServer.listen (dart:_http/http_impl.dart:3235:19)
#6      _StreamIterator._initializeOrDone (dart:async/stream_impl.dart:1028:33)
#7      _StreamIterator.moveNext (dart:async/stream_impl.dart:1004:12)
#8      Authenticator._startServer.<anonymous closure>
#9      Authenticator._startServer.<anonymous closure>
openid_client_io.dart:120
#10     _rootRunUnary (dart:async/zone.dart:1434:47)
#11     _CustomZone.runUnary (dart:async/zone.dart:1335:19)

My implementation:

Future<oidc.TokenResponse> authenticate(
      Uri uri, String clientId, List<String> scopes) async {
    var issuer = await oidc.Issuer.discover(uri);
    var client = oidc.Client(issuer, clientId);

    urlLauncher(String url) async {
      if (await canLaunch(url)) {
        await launch(url, forceWebView: true, enableJavaScript: true);
      } else {
        throw 'Could not launch $url';
      }
    }

    var authenticator = oidc.Authenticator(
      client,
      scopes: scopes,
      urlLancher: urlLauncher,
      port: 3000,
      redirectUri: Uri.parse('XXXXX')
    );

    var c = await authenticator.authorize();
    closeWebView();

    var res = await c.getTokenResponse();
    return res;
  }

If more info is needed, please let me know.