Tried something tricky, didn't work

proxy.js

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

var responseWrap = function (res) {
    var write = res.write;
    res.write = function() {
        // Do stuff
        write.apply(this,arguments);
    }
    return res;
);

httpProxy.createServer(function (req, res, proxy) {
    //this api is why I'm trying to do it this way.
    proxy.proxyRequest(req, responseWrap(res), {
        host: "localhost",
        port: 9000
    });
}).listen(8000);


http.createServer(function (req, res) {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.write('request successfully proxied!' + '\n' +
    JSON.stringify(req.headers, true, 2) + '\n' +
    JSON.stringify(req.socket.remoteAddress, true, 2) + '\n' +
    JSON.stringify(req.url) + '\n' +
    ""
  );
  res.end();
}).listen(9000);