Create a basic Socket.IO Websocket server

Question

Create a basic Socket.IO Websocket server

I am writing a websocket server with socket.io but don't know why is not working.

This works:

var WebSocketServer = require('ws').Server;

wss = new WebSocketServer({port: 8100});

wss.on('connection', function(ws) {

    console.log('New connection!');

    ws.on('close', function() {
        console.log('Client connection closed!');
    });

    ws.on('message', function(message) {

    });

});

This runs, but my client is not able to connect:

var io = require('socket.io').listen(8100);

io.sockets.on('connection', function (socket) {
    console.log('New Connection');
});

Source: Book Professional Node.js

The client is a Javascript basic web browser client that works with any server so please disregard client side issues.

node.js
socket.io

Answer 1

Try setting the transports explicitly to websocket only, since socket.io has fallback options for long-polling and flash sockets.

var io = require('socket.io')(8100, {transports: ['websocket']})

io.sockets.on('connection', function (socket) {
    console.log('New Connection');
});