Node.js MITM HTTP proxy

mitm_proxy.js

var http = require('http');
var httpProxy = require('http-proxy');
var body = require("body");
var proxy = httpProxy.createProxyServer({secure:false});

proxy.on('proxyReq', (proxyReq, req) => {
        if (req.body) {
			console.log(req.body);
			proxyReq.setHeader('Content-Length', Buffer.byteLength(req.body));
            proxyReq.write(req.body);
        }
    });

http.createServer((req, res) => {
    body(req, res, {}, (err, body) => {
        req.body = body;
        proxy.web(req, res, { 
			target: 'http://targetserver.com', 
			secure: false, 
			toProxy: true, 
			changeOrigin: true
		});
    });
}).listen(80);