HTTP server handling connection upgrade

0-intro.md

Introduction

This gist shows a basic implementation of a HTTP server that handles the request to upgrade connection to Websockets.

upgrade.js

const http = require('http');
const WebSocket = require('ws');

const server = http.createServer();
const wss = new WebSocket.Server({ noServer: true });

server.on('upgrade', (request, socket, head) => {
  wss.handleUpgrade(request, socket, head, function done(w) {
    wss.emit('connection', ws, request)
  })
})

server.listen(8080)