proxy requests in node/express with an access token.

proxy.js

var request = require('request');
var url = require('url');
var proxy = require('express')();

var buildUrl = function (path, query) {
  var uri = url.parse(config.api.host);
  uri.pathname = path;
  if(query) { uri.search = "?" + query };
  return url.format(uri);
};

proxy.all('*', function (req, res, next){
  if (req.session.access_token) {
    req.headers['Authorization'] = "Bearer " + req.session.access_token;
  }

  var currentUrl = url.parse(req.url);
  var newUrl = buildUrl(currentUrl.pathname, currentUrl.query);

  req.pipe(request(newUrl)).pipe(res);
});

module.exports = proxy;