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I am facing an issue where I am unable to connect to signalr hub using this package but I am able to connect using a different (not flutter) signalR client.
At first I thought that it could be an issue with the certificate, but i have added
class BadCertificateHttpOverride extends HttpOverrides {
@override
HttpClient createHttpClient(SecurityContext? context) {
return super.createHttpClient(context)
..badCertificateCallback =
(X509Certificate cert, String host, int port) => true;
}
}and it is being called, I am not sure what is the issue and I am struggling to find out please help. Here are the logs:
I/flutter (23866): FINER: 2022-10-27 22:07:35.314430: Starting HubConnection.
I/flutter (23866): FINER: 2022-10-27 22:07:37.919484: Starting connection with transfer format 'TransferFormat.Text'.
I/flutter (23866): FINER: 2022-10-27 22:07:41.187448: The HttpConnection connected successfully.
I/flutter (23866): FINER: 2022-10-27 22:07:41.187898: Sending handshake request.
I/flutter (23866): FINER: 2022-10-27 22:07:46.800255: HttpConnection.stopConnection(Unknown) called while in state ConnectionState.Connected.
I/flutter (23866): FINER: 2022-10-27 22:07:48.346132: HubConnection.connectionClosed(null) called while in state HubConnectionState.Connecting.
I/flutter (23866): FINER: 2022-10-27 22:07:49.159922: Hub handshake failed with error 'The underlying connection was closed before the hub handshake could complete.' during start(). Stopping HubConnection.
I/flutter (23866): FINER: 2022-10-27 22:07:49.161156: Call to HttpConnection.stop(Exception: The underlying connection was closed before the hub handshake could complete.) ignored because the connection is already in the disconnected state.
I/flutter (23866): FINER: 2022-10-27 22:07:49.162053: HubConnection failed to start successfully because of error 'The underlying connection was closed before the hub handshake could complete.'.
this is how I am building the connection:
HubConnection buildConnection() {
final transportProtLogger = Logger("SignalR - transport");
final hubProtLogger = Logger("SignalR - hub");
PrintUtil.info(text: "building hub connection");
HubConnection connection = HubConnectionBuilder()
.withUrl(
AppConfig.signalrUrl,
options: HttpConnectionOptions(
logger: transportProtLogger,
logMessageContent: !AppConfig.isProd,
transport: HttpTransportType.WebSockets,
accessTokenFactory: () async {
String accessToken = GetIt.I<ShopperApiClient>().accessToken;
return accessToken;
},
),
)
.withAutomaticReconnect(retryDelays: delaysInMilliSeconds)
.configureLogging(hubProtLogger)
.withHubProtocol(JsonHubProtocol())
.build();
return connection;
}it works with long polling but not websockets
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