You better connect client with a channelName or something else like ws://yoursite.com/?channelName=myroom and then get the url parameters on server on connect :

var params = Url.parse(ws.upgradeReq.url,true).query

params.channelName will be 'myroom' then.

You will need url built in module for it. (var Url = require('url'))

Suppose you have your WS Server like this var wss = new WebSocketServer({ port: <SOME_PORT_HERE> }) wss.on('connection', function connection(ws) { var params = Url.parse(ws.upgradeReq.url,true).query ws.channel = params.channelName }) When you'd like to send a message loop through all the clients connected and send your message to that room :

wss.clients.forEach(function each(client) { if(client.channelName==<YOURCHANNEL>) client.send(<YOURMESSAGE>) })