Here is a example of chatting. full codes are https://github.com/bwcho75/node.js_study/tree/master/node_chatting
Hope it to helpful to u. P.S. it uses room. So if u want to send message to all user. Change io.sockets.in(room).emit to io.sockets.emit
var express = require('express');
var routes = require('./routes');
var http = require('http');
var path = require('path');
var app = express();
app.use(express.bodyParser());
app.use(express.cookieParser('your secret here'));
app.use(express.session());
app.use(express.static(path.join(__dirname, 'public')));
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(app.router);
var httpServer =http.createServer(app).listen(3000, function(req,res){
console.log('Socket IO server has been started');
});
// upgrade http server to socket.io server
var io = require('socket.io').listen(httpServer);
var count = 0;
var rooms = new Array() ;
app.get('/:room',function(req,res){
console.log('room name is :'+req.params.room);
res.render('index',{room:req.params.room});
});
io.sockets.on('connection',function(socket){
socket.on('joinroom',function(data){
socket.join(data.room);
socket.set('room', data.room,function() {
var room = data.room;
var nickname = '손님-'+count;
socket.emit('new', {nickname: nickname});
// Create Room
if(rooms[room] == undefined ){
console.log('room create :'+room);
rooms[room] = new Object();
rooms[room].nicknames = new Object();
rooms[room].socket_ids = new Object();
}
// Store current user's nickname and socket.id to MAP
rooms[room].socket_ids[nickname] = socket.id
rooms[room].nicknames[socket.id] = nickname;
// broad cast join message
data = {msg : nickname +' 님이 입장하셨습니다.'};
io.sockets.in(room).emit('broadcast_msg',data);
// broadcast changed user list in the room
io.sockets.in(room).emit('userlist',{users:Object.keys(rooms[room].socket_ids)});
count++;
});
});
socket.on('changename',function(data){
socket.get('room',function(err,room){
var nickname = data.nickname;
// if user changes name get previous nickname from nicknames MAP
var previous_nickname = rooms[room].nicknames[socket.id];
if(previous_nickname != undefined){
delete rooms[room].socket_ids[previous_nickname];
}
rooms[room].socket_ids[nickname] = socket.id
rooms[room].nicknames[socket.id] = nickname;
data = {msg : previous_nickname +' 님이 '+nickname+'으로 대화명을 변경하셨습니다.'};
io.sockets.in(room).emit('broadcast_msg', data);
// send changed user nickname lists to clients
io.sockets.in(room).emit('userlist',{users:Object.keys(rooms[room].socket_ids)});
});
});