main.js

var _ = require('underscore');
var http = require('http');
var httpProxy = require('http-proxy');
var https = require('https');
var fs = require('fs');

var opts = require('optimist')
  .usage('Test auth proxy.\nUsage: $0 [extPort] [destPort] [destHostName] --ssl')
  .describe('ssl', 'Enable SSL on both the client and expect it on the target.')
  .demand(0);
var argv = opts.argv;

var port = argv._[0]?argv._[0] : 8000;
var destPort = argv._[1]?argv._[1] : 3838;
var destHostname = (argv._[2])?argv._[2] : 'localhost';

var options = {
  target: {
    https: argv.ssl,
    rejectUnauthorized: false
  }
}

if (argv.ssl){
  options.https = {
    key: fs.readFileSync('/home/jeff/workspace/test-key.pem'),
    cert: fs.readFileSync('/home/jeff/workspace/test-cert.pem')
  }
}
var proxy = new httpProxy.HttpProxy({ 
  target: {
    host: destHostname, 
    port: destPort,
    https: argv.ssl,
    rejectUnauthorized: false
  }
});

if (argv.ssl){
  https.createServer(options.https, function (req, res) {
    req.headers['SOME_AUTH'] = 'SOMETHING';
    proxy.proxyRequest(req, res);
  }).listen(port);
} else{
  http.createServer(function (req, res) {
    req.headers['SOME_AUTH'] = 'SOMETHING';
    proxy.proxyRequest(req, res);
  }).listen(port);
}

package.json

{
  "name": "test-auth-proxy",
  "preferGlobal": "false",
  "version": "0.1.0",
  "author": "RStudio <jeff@rstudio.com>",
  "description": "Simple auth proxy.",
  "bin": "./main.js",
  "scripts": {
    "start": "node ./main.js 8000 3838 localhost"
  },
  "repository": {
    "type": "git",
    "url": "https:///gist.github.com/7160493"
  },
  "dependencies" : {
    "http-proxy"        :  "0.10.x",
    "underscore"        :  "1.4.x",
    "optimist"          :  "0.6.x"
  },
  "license": "AGPL-3",
  "engines": {
    "node": ">=0.8.16"
  }
}