Taurian Taurian - 1 year ago 196
Javascript Question

Socket IO Server to Server

Is it possible for a server to connect to another using Socket.IO and be treated like a client?

And have it join rooms, recieve io.sockets.in('lobby').emit(). And more?

The first server is also listening for connections/messages as well.

Hey Brad, here's my full .js app below for reference:

var io = require("socket.io").listen(8099);
io.set('log level', 1);

io.sockets.on("connection", function (socket) {

console.log('A Client has Connected to this Server');

//Let Everyone Know I just Joined
socket.broadcast.to('lobby').emit("message",'UC,' + socket.id); // Send to everyone in Room but NOT me

socket.on("message", function (data) {

//Missing code
socket2.send('message,' + data); //Forward Message to Second Server


socket.on("disconnect", function (data) {
//Send Notification to Second Server
//Need to figure out later

//Send Notification to Everyone
socket.broadcast.emit("message",'UD,' + socket.id ); //Send to Everyone but NOT me

//Remove user from Session ID

//Send Notification to Console
console.log("disconnecting " + arRoster[socket.id][1]);


var io_client = require( 'socket.io-client' );
var socket2 = io_client.connect('');
socket2.on('connect', function () {

Answer Source

Yes, absolutely. Just use the Socket.IO client in your server application directly.


You can install it with npm install socket.io-client. Then to use:

var socket = io.connect('http://example.com');
socket.on('connect', function () {
  // socket connected
  socket.emit('server custom event', { my: 'data' });
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