A node-based proxy server example. Here 8 game servers are listening for websocket connections (ports 8000-8007), a file server that serves the game's assests is listening on 7999, and a small app that creates a list of the servers is running on 8080. Externally all of these services are exposed on port 80 and different urls. /0 through /7 are t…

proxy.js

var http = require('http')
var httpProxy = require('http-proxy')

var servers = {
    '/0': 'ws://127.0.0.1:8000',
    '/1': 'ws://127.0.0.1:8001',
    '/2': 'ws://127.0.0.1:8002',
    '/3': 'ws://127.0.0.1:8003',
    '/4': 'ws://127.0.0.1:8004',
    '/5': 'ws://127.0.0.1:8005',
    '/6': 'ws://127.0.0.1:8006',
    '/7': 'ws://127.0.0.1:8007',
}

var proxy = httpProxy.createProxyServer({})

proxy.on('error', (err, req, res) => {
    console.log('err', err)
})

var server = http.createServer((req, res) => {
    if (req.url === '/servers') {
        // to the master server list api
        req.url = '/'
        proxy.web(req, res, { target: 'http://127.0.0.1:8080' })
    } else {
        // everything else to the static file server
        proxy.web(req, res, { target: 'http://127.0.0.1:7999' })
    }
})

server.on('upgrade', (req, socket, head) => {
    // to the websocket game servers! (the ones in the servers array)
    proxy.ws(req, socket, head, { target: servers[req.url] })
})

server.listen(80)