Using WebSockets on Samsung Smart TV - sockets

Question

My requirement is to have a listening socket in my Samsung Smart TV app, in order to receive events from a device in the same local network.
I've been searching the web for methods to do that and I came across terms like Node.js, Socket.io, websocket. Even though i understand these terms in terms of web development (I think), I am unable to picture a method to open a listening socket in my Samsung Smart Tv App.
Just for the sake of playing around I wrote a TCP Server code on iOS using GCD Async Sockets and thought of connecting it to the smart tv and send a welcome message.
This is the code on my smart tv -
//var wsUri = "wss://echo.websocket.org/";
var wsUri = "ws://192.168.1.116:9898/";
//var output;
var webSocketObj={};
webSocketObj.init = function()
{
//output = document.getElementById("output");
this.testWebSocket();
};
webSocketObj.testWebSocket = function()
{
websocket = new WebSocket(wsUri);
websocket.onopen = function(evt) { onOpen(evt); };
websocket.onclose = function(evt) { onClose(evt); };
websocket.onmessage = function(evt) { onMessage(evt); };
websocket.onerror = function(evt) { onError(evt); };
};
function onOpen(evt)
{
writeToScreen("CONNECTED");
doSend("WebSocket rocks");
}
function onClose(evt)
{
writeToScreen("DISCONNECTED");
}
function onMessage(evt)
{
writeToScreen('<span style="color: blue;">RESPONSE: ' + evt.data+'</span>');
websocket.close();
}
function onError(evt)
{
writeToScreen('<span style="color: red;">ERROR:</span> ' + evt.data);
}
function doSend(message)
{
writeToScreen("SENT: " + message);
websocket.send(message);
}
function writeToScreen(message)
{
/* var pre = document.createElement("p");
pre.style.wordWrap = "break-word";
pre.innerHTML = message;
output.appendChild(pre);*/
alert('SOCKET HELPER SAYS : '+message);
}
I have a button and I'm calling webSocketObj.init() on the button click.
Logs of my didReadData of the server :
Client says : GET / HTTP/1.1
Log from SmartTv :
[JS ALERT]: Scenewebsocket.handleKeyDown(29443)
[JS ERROR]:
File: file://
Line No: 0
Error Detail:
[JS ALERT]: SOCKET HELPER SAYS : DISCONNECTED
ALSO I tried echoing the message back to the Smart Tv from the server. And this time i got the logs
Client says : GET / HTTP/1.1
Client says : Upgrade: WebSocket
Client says : Connection: Upgrade
Client says : Host: 192.168.1.116:9898
Client says : Origin: file://
Client says : Sec-WebSocket-Key1: 1504l73 8Ew/J 4 ,L7W6
Client says : Sec-WebSocket-Key2: TK2 81d A64Bo7 118 0
I know i'm doing something horribly wrong...what is it? Pls help.

Answer 1

Have you tried socket.io server and client libraries?
We have socket.io server on node.js, and TV can connect to it using socket.io-client library. On 2012 TV it uses websocket. On 2011 TV it uses XHR fallback.

Answer 2

You can use socket.io library to make it easier for yourself to use WebSockets.
You would include a web browser version of socket.io in the samsung tv like this:
<script src="http://*some ip address*/socket.io/socket.io.js"></script>
Where some ip address is the ip address of a nodejs server that you control.
On your server you would need to install NodeJS with the socket.io server version.