Latest Free Screencasts

Rack is the basis for most major web frameworks in Ruby (like Ruby on Rails.) This video gives a basic overview on how it is used and what features make it a powerful component for Ruby Web Frameworks

Rails 2.3 shipped with Rack support and contains a set of middleware libraries which can be used to customize and optimize your Rails application. In this screencast we go over the basics of Rack & Rack Middleware, walk through the Rails Rack stack, and show how to optimize certain actions in your Rails application using Metal.

Rack middleware is a way to filter a request and response coming into your application. In this episode I show how to modify the response body using middleware.