How to proxy and dump raw HTTP requests in node.js

proxy.js

const {createServer} = require('http')
const proxy = require('http-proxy').createProxyServer()

var server = createServer(function (req, res) {
  if (process.env.TARGET) proxy.web(req, res, { target: process.env.TARGET })
  else res.end('OK\n')
})
server.on('connection', socket => socket.pipe(process.stdout))

const host = process.env.HOST || '0.0.0.0'
const port = process.env.PORT || 8080
server.listen(port, host)