This document provides an overview of Sinatra and how it compares to Rails. It begins with an agenda and introduces Sinatra as a Ruby web framework that is not based on MVC. It then contrasts the terminology and concepts between Sinatra and Rails such as HTTP actions, routes, views, helpers and configuration. Examples are provided of using Sinatra for simple web applications and APIs. Rack is introduced as a way to integrate Sinatra with Rails. Performance comparisons show Sinatra to have faster request times than Rails. Resources for further learning about Sinatra, Rack, and scaling Rails are provided.

2. Agenda
• Sinatra Introduction
• Real Example
• Rack
• Rails Intergation

3. • http://twitter.com/xdite
• http://blog.xdite.net
• Rails Developer

4. Sinatra is ...
• ruby web framework library
• not MVC ( Model-View-Controller )
• DSL for defining RESTful HTTP actions

5. RAILS LINGO
ORM , MVC , Testing , Mail ,
Generator, RJS, I18n, Template , Engine .....

6. SINATRA LINGO
GET / POST / PUT / DELETE , request
paramenters, response, views , helpers , configure , rack

7. Single file web-app

8. Single file web-app

9. Hello World!

10. HTTP actions

11. Routes

12. Views

13. Helpers

14. Filter

15. Configure

17. • Web Service / API
• Tiny Web Application
• Rails Metal

18. Web Service / API

19. Requests per second: 81.09 [#/sec] (mean)
Time per request: 12.332 [ms] (mean) Rails action
Requests per second:450.56 [#/sec] (mean) Sinatra
Time per request: 2.219 [ms] (mean)
Ubuntu 8.04, Intel Atom N270 @1.60GHz

20. Tiny Web Application

21. • simple
• cherry pick
• ActiveRecord / Datamapper
• Prototype / jQuery

23. twitter IE6

25. • CodeIgniter - PHP framework
• Twitter API
• LOC : 1000+
• NOT support CJK

26. require 'rubygems'
require 'sinatra'
require 'twitter_search'
get '/' do
@client = TwitterSearch::Client.new 'politweets'
@results = @client.query :q => '@MrIE6'
erb :home
end
10 ..

27. • ORM
• Paginate

28. 40

30. Rails Metal with Sinatra

31. Rack provides a minimal interface
between webservers supporting Ruby and Ruby frameworks
Core Code Middleware Mongrel
rack middleware

34. http Profiling Security Caching
Middleware Middleware Middleware
Handler
Core Code
for Rack

35. $ rake middleware

36. Scaling Rails - Metal
• Rack action
• Sinatra Metal app

37. Performance

38. class OldPollerController < ApplicationController
def poller
render :text => "Hello World!"
end
end
class Poller < Rails::Rack::Metal
def call(env)
if env["PATH_INFO"] =~ /^/poller/
[[200], {"Content-Type" => "text/html"}, "Hello, World!"]
else
[[404], {"Content-Type" => "text/html"}, "Not Found"]
end
end
end
25

39. Requests per second: 81.09 [#/sec] (mean) Rails action
Time per request: 12.332 [x`x] (mean)
Requests per second: 163.75 [#/sec] (mean) Metal + Sinatra
Time per request: 6.107 [ms] (mean)
Ubuntu 8.04, Intel Atom N270 @1.60GHz

40. Q &A

41. Resources
• Scaling Rails : Episode #14 Rack
• RailsCast: Episode #251 Rack Middleware
• Pragprog.com : Classy Web Development
with Sinata
• Github / xdite : tweesage-message-wall