Lite http dynamic proxy in js

app.js

// https://imququ.com/post/web-proxy.html
// test cmd:
// curl --proxytunnel -x http://localhost:8000 --proxy-basic --proxy-user a:b  httpbin.org/get

var http = require('http')
var net = require('net')
var url = require('url')

function connect(cReq, cSock) {
  let u = url.parse('http://' + cReq.url)
  console.log('has one connect: ', cReq.url, '\n', cReq.headers)
  let auth = _.chain(cReq.headers)
    .get('proxy-authorization')
    .thru(str => {
      let sp = (str || '').split(' ')
      let authInfo = sp[1] && Buffer.from(sp[1], 'base64').toString() || ''
      let [userName, pwd] = authInfo.split(':')
      return userName === 'admin' && pwd === 'admin'
    })
    .value()

  if (!auth) {
    cSock.end()
    return
  }

  let pSock = net.connect(u.port, u.hostname, function() {
    cSock.write('HTTP/1.0 200 Connection Established\r\n\r\n')
    pSock.pipe(cSock)
  }).on('error', function(e) {
    cSock.end()
  })

  cSock.pipe(pSock)
}

http.createServer()
  .on('connect', connect)
  .listen(8000, '0.0.0.0')