If you’re writing web applications with Ruby there comes a time when you might need something a lot simpler, or even faster, than Ruby on Rails or the Sinatra micro-framework. Enter Rack.
In this 5:25 minute long video we’ll quickly explore the Rack framework, which powers Ruby on Rails, Sinatra, and a whole host of other frameworks. We’ll start with a one line Rack application and move on to write a very simple web framework using this powerful tool.
A lot of people have asked about a gist of the code, here it is https://gist.github.com/4240848 it’s the full script of the screen cast along with all of the code. Enjoy!