Rack :: A Ruby Webserver Interface

Over on the Ruby-lang list, there was a discussion which pointed me to Rack. Check it out:

Rack provides an minimal interface between webservers supporting Ruby and Ruby frameworks.

super simple API for writing web apps

single API to connect to mongrel, fast-cgi, webrick

based on python’s WSGI, which was a good thing for python

Found this intriguing...

using the mongrel handler we can get crazy concurrency

let’s have a look at this, using ab

• %w(rubygems rack).each { |dep| require dep }
  app = lambda { |env| sleep(5); [200, {}, 'Oi!'] }
  Rack::Handler::Mongrel.run(app, :Port => 3000)
• ab -c 100 -n 300 http://0.0.0.0:3000/
• Benchmarking 0.0.0.0 (be patient)
  Completed 100 requests
  Completed 200 requests
  Finished 300 requests
  Concurrency Level: 100
  Time taken for tests: 15.232 seconds
  Complete requests: 300
  Failed requests: 0

http://rack.rubyforge.org/

http://macournoyer.wordpress.com/2007/12/14/rack-the-framework-framework/

http://yeahnah.org/files/rack-presentation-oct-07.pdf