node.js request proxy

info.md

This original request http://web.com/api/v1/resources hits the /api namespace and is sent to the proxy.js app. The proxy.js app recieves /v1/resources and uses that to build the new request to http:/api.com/v1/resources.

proxy.js

var url = require('url')
  , request = require('request');

var buildUrl, proxy;

buildUrl = function (url) {
  var newUrl, currentUrl;
  currentUrl = url.parse(url);
  newUrl = url.parse('https://myotherdomain.com/');
  newUrl.pathname = currentUrl.pathname;
  newUrl.search = '?' + currentUrl.query;
  return url.format(newUrl);
}

proxy = require('express')();

proxy.all('*', function (req, res, next) {
  // take the original request
  // pipe it into a new request with a new url
  // pipe the new request's response into the original response
  req.pipe(request(buildUrl(req.url))).pipe(res);
}

module.exports = proxy;

server.js

var app = require('express')();

app.all('/api', require('./proxy'));

app.get('/', function (req, res, next) {
  res.send('use the /api namespace to make api calls');
});