neo-proxy/example.js

A man-in-the-middle (mitm) proxy that impersonates the target site and allows you to modify the target's http response before sending it back to the client.

var startingPort = 8000

var neoProxy = require('./')

var exec = require('shelljs').exec

var localIp = geten0BroadcastIP()

var customHTML = '<script>alert("also visible at http://'+localIp
  +':'+startingPort+'")</script>'

var batman = neoProxy({
  port: startingPort,
  target: 'http://dtrejo.com',
  needle: '</body>',
  customHTML: customHTML,
  rewriteUrlsHost: localIp
})

function geten0BroadcastIP() {
  var out = exec('ifconfig', { silent: true }).output
  out = out.slice(out.indexOf('en0'), out.length)
  out = out.slice(out.indexOf('inet ') + 'inet '.length, out.indexOf('netmask'))
  var ip = out = out.trim()
  return ip
};