Node Cookbook - Third Edition

How to do it...

In server.js, let's begin by requiring our dependencies:

const http = require('http') const fs = require('fs') const ws = require('ws') 

Next we want to load public/index.html into memory (we'll write index.html shortly), create an HTTP server, and then enhance it with a WebSocket server:

const app = fs.readFileSync('public/index.html') const server = http.createServer((req, res) => {   res.setHeader('Content-Type', 'text/html')   res.end(app) }) const wss = new ws.Server({server}) 

Now that we have our WebSocket server instance (wss), we can listen to its connection event:

wss.on('connection', (socket) => {   socket.on('message', (msg) => {     console.log(`Received: ${msg}`)     console.log(`From IP:  ${socket.upgradeReq.connection.remoteAddress}`) ...