Websockets can't receive messages from server?

I'm using the latest version of Unity (5.1.3f1) and Simple Web Sockets for Unity WebGL, located on the asset store (https://www.assetstore.unity3d.com/en/#!/content/38367), to test websocket communication.

In editor, my very simple echo script works just fine. It's able to send and receive messages, as well as display errors, no problems whatsoever. However, when I build and deploy to my test box, I can no longer receive messages from the server. Client is still sending messages and handling errors just fine, and the server's getting those messages and still trying to respond. The client's just a dead fish when it comes to RecvString().

FWIW, the communication between page and native javascript websocket implementation is fine (I hastily scripted a test to make sure).

I'm using Firefox Developer Version, but also tested with standard, as far as browsers are concerned.

 

I think I've found a solution to this that worked at least for my issue, I looked at the C# script in the plugins folder called WebSocket and swapped out the line
returnEncoding.UTF8.GetString (retval);
with
returnConvert.ToBase64String(retval);
enabled me to apply the byte arrays I was sending from my server to textures. My problem is that I can't send simple strings like "1" to my server which is how I get things rolling from the client side. Been stuck on it for days. Interestingly I can get in touch with the echo server and send messages fine too which makes me think it's to do with my server implementation, which uses jetty

 

Latest Nov 2015 version is missing string receive handling (and a warning about uncaught types...), to hack fix it add this in WebSocket.jslib around line 30, tacked onto the if/else for onmessage handling:

Code (CSharp):

1.         else if(typeof e.data === "string") {
2.             var reader = new FileReader();
3.             reader.addEventListener("loadend", function() {
4.                 var array = new Uint8Array(reader.result);
5.                 socket.messages.push(array);
6.             });
7.             var blob = new Blob([e.data]);
8.             reader.readAsArrayBuffer(blob);
9.         }

Credit goes to https://github.com/sta/websocket-sharp/issues/181#issuecomment-158873401