var http = require('http'),
    fs = require('fs'),
    connect = require('connect'),
    httpProxy = require('http-proxy'),

    proxy = httpProxy.createProxyServer({});

proxy.on('proxyReq', function (proxyReq, req, res, options) {
    if (req.headers['content-type']==='text/xml') {
        // send it to target and also forward to another server
    }
});


var app = connect()
    .use(function (req, res) {
        proxy.web(req, res,
            {
                target: {
                    port: 8081,
                    host: 'localhost'
                }
            })
    });

http.createServer(app).listen(8080, function () {
    console.log('proxy listen 8080');
});