Simple http proxy to local VM

proxy.js

/*

TODO:

- add support for https
- add POST support

*/

var http = require('http');
var sep  = '-';

http.createServer(function(reqa, resa) {
  var myip = reqa.headers.host;
  var host = false;
  var path = false;

  if (reqa.url.indexOf('/' + sep) === 0) {
    var s = reqa.url.substr(1).indexOf('/');
    host = reqa.url.substr(2, s - 1);
    path = reqa.url.substr(s + 1);
  } else if (reqa.headers.referer) {
    var s = reqa.headers.referer.indexOf('/' + sep);

    if (s !== -1) {
      var ss = reqa.headers.referer.substr(s + 2);
      var s = ss.indexOf('/');
      host  = ss.substr(0, s);
      path  = reqa.url;
    }
  }

  if (host === false) {
    resa.writeHead(500);
    resa.end();
    return;
  }


  delete reqa.headers.host;
  delete reqa.headers['accept-encoding']; // Make sure we don't get any encoded files (we can't replace content inside those).

  console.log('connecting to: ' + host + ' using url: ' + path);

  http.request({
    port   : 80,
    host   : host,
    method : reqa.method,
    path   : path,
    headers: reqa.headers
  }, function(resb) {
    resa.writeHead(resb.statusCode, resb.headers);

    resb.on('error', function(err) {
      console.log(err);
      resa.end();
    });

    resb.on('data', function(chunk) {
      if (resb.headers['content-type'] == 'text/html') {
        chunk = chunk.toString('ascii')
          .replace(/http:\/\//g, 'http://' + myip + '/' + sep);
      }

      resa.write(chunk);
    });

    resb.on('end', function() {
      resa.end();
    });
  }).end();
}).listen(8000);