Debugging MiniWamp

[Luke47]

Hey!

Thanks for this cool library.

I have a question regarding debugging it. Connection to the websocket works fine, I got a session id and it seems connected. But it seems that I do not get any response from the websocket.

Meaning, i receive no event notifications after subscribing and when calling for example var sum = await session.Call<int>("rpc#add", 3, 4); //sum = 7 it is "awaiting" forever.

Do you have an idea how to debug this? Is there some debug log, which I can enable, which prints out all the communication which happens between the websocket and MiniWamp?

Thank you :)

[Luke47]

I think i found the issue: Our websocket server only accepts UTF8 strings, but MiniWamp uses binary formatted messages. This leads to immediate closing of the connection after sending the first message.

[paulpdaniels]

Hmmm...The default is to always send text I believe. Both the MessageWebSocket and the WebSocket classes are sending with UTF-8 encoding.

Off the top of my head I am not sure where your issue would be. But I do see two issues that need to be addressed via MiniWamp:

1. Debugging log support
2. A shutdown connection should fail all pending Calls as well.

I'll try and roll out an update this week.

[Luke47]

Thanks for your support. Debugging log would be great :)

I just tried to build some some simple websocket stuff by myself and it works. Maybe I'm missing some configuration with MiniWamp. But the debug log would help discovering that.

[paulpdaniels]

Out of curiousity, what is your current setup? Are you using the .Net 4.5 version or the PCL? And what is your server?

[Luke47]

My setup is:

• Windows Phone 8.1
• MiniWamp PCL v0.2.4
• Server-side we are using the gevent-websocket package (v0.9.5) with WAMP v1
• Web socket endpoint is: wss://XYZ.com/ws/?auth_token=XYZ ( I get [0,"0LXM2d6dZdJC2VTv",1,"gevent-websocket\/0.9.5"] as a response, so connection seems to work fine)
• After that, calls are made like http://domain/users/get_profile -> now I do not get anything back.

Do you need to know anything else?

If I try to do it manually, it works (maybe I'm overseeing something?). That are the snippets I use:

Connecting / Sending

Uri echoService = new Uri("wss://XYZ.com/ws?auth_token=XYZ", UriKind.Absolute);
MessageWebSocket messageWebSocket = new MessageWebSocket();
messageWebSocket.Control.MessageType = SocketMessageType.Utf8;
messageWebSocket.MessageReceived += MessageWebSocket_MessageReceived;
messageWebSocket.Closed += MessageWebSocket_Closed;
await messageWebSocket.ConnectAsync(echoService);

var writer = new DataWriter(this.messageWebSocket.OutputStream);
object[] messageToSent = new object[3];
messageToSent[0] = 2;
messageToSent[1] = "d7ayjg9vutw1ny8jtyd7h9f6r";
messageToSent[2] = "http://domain/ping";
writer.WriteString(JsonConvert.SerializeObject(messageToSent));
await writer.StoreAsync();

Receiving

private void MessageWebSocket_MessageReceived(MessageWebSocket sender, MessageWebSocketMessageReceivedEventArgs args)
{
    using (var reader = args.GetDataReader())
    {
       reader.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;
       var text = reader.ReadString(reader.UnconsumedBufferLength);
       Debug.WriteLine("Response is:" + text);
    }
}

[Luke47]

I've just downloaded your source code and did some tests. I don't know if this was changed recently, but for me, the default websocket messagetype was binary. After adding

this._socket.Control.MessageType = SocketMessageType.Utf8; to MessageWebSocketTransport

it works flawlessly.

Thank you for your help so far! :)

[paulpdaniels]

Hmm...I guess I need to have some more integration tests. Glad it is working though! I'll add your change into my fix.

[Luke47]

Thanks for your work! :) I was able to fix all my remaining issues (https://github.com/paulpdaniels/MiniWamp/issues/8 & some issues related to our server)

Keep up the good work!