check out the blog posts -

1. http://mherman.org/blog/2013/10/20/handling-ajax-calls-with-node-dot-js-and-express-scraping-craigslist/
2. http://mherman.org/blog/2013/11/01/handling-ajax-calls-with-node-dot-js-and-express-part-2/
3. http://mherman.org/blog/2013/12/21/handling-ajax-calls-with-node-dot-js-and-express-part-3/
4. http://mherman.org/blog/2014/04/15/handling-ajax-calls-with-node-dot-js-and-express-part-4/
5. http://mherman.org/blog/2014/04/15/handling-ajax-calls-with-node-dot-js-and-express-part-5