[ClientWebSocket] Immediate closure after sending/receiving message

[Eternal-ll]

Hello!

I have to use ClientWebSocket on my project to connect to specific TCP server over WebSocket, i do connect successfully, but then i get immediately close event, no matter what i do (sending command, or receiving anything).

I checked WSS with postman/online websocket and connection working fine, messages are transmitted.

Specs:
Net: net6.0-windows10.0.17763.0

Example

                using (var client = new ClientWebSocket())
                {
                    await client.ConnectAsync(access.AccessUrl, CancellationTokenSource.Token);
                    
                    Console.WriteLine("Connected to websocket!");

                    var buffer = new byte[1024];
                    var segment = new ArraySegment<byte>(buffer);
                    var sent = false;
                    while (client.State == WebSocketState.Open)
                    {
                        if (!sent)
                        {
                            await client.SendAsync(new ArraySegment<byte>(Encoding.UTF8.GetBytes("{\"user_agent\":\"ethereal-faf-client\",\"version\":\"2.2.0\",\"command\":\"ask_session\"}\r\n")), WebSocketMessageType.Binary, false, CancellationTokenSource.Token);
                            sent = true;
                        }
                        else
                        {
                            var result = await client.ReceiveAsync(segment, CancellationToken.None);

                            if (result.MessageType == WebSocketMessageType.Text)
                            {
                                var message = System.Text.Encoding.UTF8.GetString(buffer, 0, result.Count);
                                Console.WriteLine($"Received message: {message}");
                            }
                            sent = false;
                        }
                        await Task.Delay(1000);
                    }

                    Console.WriteLine("Disconnected from websocket.");
                }

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)

Logs from another library (https://github.com/Marfusios/websocket-client)

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"}

Same for https://github.com/sta/websocket-sharp

Example of message transmission in Postman

[Eternal-ll]

Websocket bridge is setup behind cloudfare and short lived, if someone need a link, please ping me.

Last one generated wss://ws.faforever.com/?verify=1705415491-GSTR6YzqX2d5R4T1uMx8lJ7PuF90oa4fBA9XaRwUON0%3D

[Eternal-ll]

The problem was incorrect linebreak that was passed to channel