Connection immediately closes after success connection

[Eternal-ll]

Hi! I have to use websocket client to connect to specific server to make communication. Every attempt of connecting was successful, i was getting upgrade response, but then my client would receive immediately close event (1005). I`ve tried a few libraries so far none of them worked.

I checked wss url with postman/online websocket tests, and everywhere else connection working fine, messages are transmitted.

Connection using default ClientWebSocket, it stops right at SendAsync() with exception, that state CloseReceived.

                using (var client = new ClientWebSocket())
                {
                    await client.ConnectAsync(access.AccessUrl, CancellationTokenSource.Token);
                    await client.SendAsync(Encoding.UTF8.GetBytes("{\"user_agent\":\"ethereal-faf-client\",\"version\":\"2.2.0\",\"command\":\"ask_session\"}"), WebSocketMessageType.Text, WebSocketMessageFlags.None, CancellationTokenSource.Token);
                    while (!CancellationTokenSource.IsCancellationRequested)
                    {
                        var bytes = new byte[1024];
                        var result = await client.ReceiveAsync(bytes, CancellationTokenSource.Token);
                        string res = Encoding.UTF8.GetString(bytes, 0, result.Count);
                    }
                    CancellationTokenSource = null;
                }

Exception

System.Net.WebSockets.WebSocketException (0x80004005): The WebSocket is in an invalid state ('CloseReceived') for this operation. Valid states are: 'Open, CloseSent'
   at System.Net.WebSockets.WebSocketValidate.ThrowIfInvalidState(WebSocketState currentState, Boolean isDisposed, WebSocketState[] validStates)
   at System.Net.WebSockets.ManagedWebSocket.ReceiveAsync(ArraySegment`1 buffer, CancellationToken cancellationToken)
--- End of stack trace from previous location ---
   at Ethereal.FAF.UI.Client.ViewModels.LobbyConnectionViewModel.<OnConnectCommand>b__14_0()
   at AsyncAwaitBestPractices.SafeFireAndForgetExtensions.HandleSafeFireAndForget[TException](Task task, Boolean continueOnCapturedContext, Action`1 onException)
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Example with current library i just receive close event

using (var client = new WebsocketClient(access.AccessUrl, _logger))
{
    client.ReconnectTimeout = TimeSpan.FromSeconds(30);
    client.MessageReceived.Subscribe(msg => Console.WriteLine(msg.Text));
    await client.StartOrFail();
    client.IsReconnectionEnabled = false;
    client.DisconnectionHappened.Subscribe(async x =>
    {
        if (CancellationTokenSource == null) return;
        var lobbyAccess = await _fafUserApi.GetLobbyAccess(CancellationTokenSource.Token);
        client.Url = lobbyAccess.AccessUrl;
        _logger.LogInformation(lobbyAccess.AccessUrl.ToString());
        await client.Reconnect();
    });

    Task.Run(() => client.Send("{\"user_agent\":\"ethereal-faf-client\",\"version\":\"2.2.0\",\"command\":\"ask_session\"}\r\n"))
    .SafeFireAndForget();
    while (!CancellationTokenSource.IsCancellationRequested)
    {
        await Task.Delay(1000);
    }
    CancellationTokenSource = null;
}```


Logs
```log
info: Websocket.Client.WebsocketClient[0]
      wss://ws.faforever.com/?verify=1705339993-QD6XeFLHqB6OAUom8%2F6ji9XKUz0KfkypYcBeQX%2BEUTc%3D
dbug: Websocket.Client.WebsocketClient[0]
      [WEBSOCKET (null)] Starting..
trce: Websocket.Client.WebsocketClient[0]
      [WEBSOCKET (null)] Received close message
info: Websocket.Client.WebsocketClient[0]
      [WEBSOCKET (null)] Client is already stopped
dbug: Websocket.Client.WebsocketClient[0]
      [WEBSOCKET (null)] Client is not connected to server, cannot send: {"user_agent":"ethereal-faf-client","version":"2.2.0","command":"ask_session"}

[Marfusios]

Hey,
I would say it comes directly from the server, it kills your connection.
Maybe you need to provide some auth header when connecting? Or origin, user agent header, etc.

Example here

[Eternal-ll]

Hi!
Problem was on my end, after successful authorization i sent broken command and server killed my connection.

Thanks