NodeJS - SOCKET.IO : Managing websockets

nodeJs.socketio.managingWebSockets.js

// Managing websocket with socket.io
// Setting a web socket and sending a message from client to server.

// Server side
var app    = require('express')()
  , util   = require('util')
  , server = require('http').createServer(app)
  , io     = require('socket.io').listen(server)
  , port   = 8013

server.listen(port)

io.set("heartbeat interval", 10)
io.set("close timeout", 12)
io.sockets.on('connection', function (socket) {
  
  var id       = socket.id
  var endpoint = socket.handshake.address
  var client   = 'unknown'
  console.log("Id: " + id + " - Endpoint: " + endpoint.address + ":" + endpoint.port)

  socket.on('disconnect', function () {
    console.log(client, ' - Client disconnected')
  })

  socket.on('message', function (message) {
    client = message.from
    console.log(message.from, 'said', message.content)
  })

  socket.on('ping', function (from) {
    client = from
    console.log('Ping from client ' + client)
    socket.emit('pong')
  })
})


// **********************************************************************************//


// Client side
// Sintaxis: node socket.io.client.js [client name]

var io   = require('socket.io/node_modules/socket.io-client')
var util = require('util')

var message = { 'from': process.argv[2], 'content': 'Hello world!'}
var socket  = io.connect( 'localhost'
                        , { 'port':8013 
                          , 'connect timeout': 10000
                          , 'try multiple transports': false 
                          , 'reconnect': true 
                          , 'reconnection delay': 200 
                          , 'max reconnection attempts': 5 
                          }
                        )

socket.on('connect', function(){

  socket.on('pong', function(){
    console.log('Pong!')
    console.log('Sending message: ' + message.content)
    socket.json.send(message)
    socket.disconnect()
  })

  socket.on('disconnect', function(){
    console.log('Disconnected!')
  })

  console.log("Ping... ")
  socket.emit('ping', message.from)
})