A Quick Introduction to Rack

nice intro to Rack

In the words of the author of Rack – Christian Neukirchen : Rack aims to provide a minimal API for connecting web servers supporting Ruby (like WEBrick, Mongrel etc.) and Ruby web frameworks (like Rails, Sinatra etc.). Web frameworks such as Sinatra are built on top of Rack or have a Rack interface for allowing web application servers to connect to them. The premise of Rack is simple – it just allows you to easily deal with HTTP requests. HTTP is a simple protocol: it basically describes the activity of a client sending a HTTP request to a server and the server returning a HTTP response. Both HTTP request and HTTP response in turn have very similar structures. A HTTP request is a triplet consisting of a method and resource pair, a set of headers and an optional body while a HTTP response is in triplet consisting of a response code, a set of headers and an optional body. Ra...

Full article: http://rubylearning.com/blog/a-quick-introduction-to-rack/