http replay

http_relay.js

var http = require('http');
http.createServer(function (req, resp) {
    var h = req.headers;
    h.host = "stackoverflow.com";
    var req2 = http.request({
        host: h.host, port: 80, path: req.url, method: req.method, headers: h
    }, function (resp2) {
        resp.writeHead(resp2.statusCode, resp2.headers);
        resp2.on('data', function (d) { resp.write(d); });
        resp2.on('end', function () { resp.end(); });
    });
    req.on('data', function (d) { req2.write(d); });
    req.on('end', function () { req2.end(); });
}).listen(1337, "127.0.0.1");
console.log('Server running at http://127.0.0.1:1337/ echoing '+h.host);