Rack (web server interface)

Rack, a Ruby Webserver Interface
Stable release	1.0.0 / May 25, 2009
Repository	github.com/rack/rack ;
Operating system	Cross-platform
Type	Middleware
License	MIT License
Website	http://rack.rubyforge.org/

Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single method call.

Example Application

A Rack-compatible "Hello World" application in Ruby syntax:

require 'rack'
app = Rack::Builder.app do 
  lambda do |env|
    body = "Hello, World!"
    [200, {"Content-Type" => "text/plain", "Content-Length" => body.length.to_s}, [body]]
  end
end

External links

RubyForge: Rack Project Summary

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