Agenda

• Sinatra Introduction

• Real Example

• Rack

• Rails Intergation

自我介紹

• http://twitter.com/xdite

• http://blog.xdite.net

• Rails Developer

Sinatra is ...

• ruby web framework library

• not MVC ( Model-View-Controller )

• DSL for defining RESTful HTTP actions

RAILS LINGOORM , MVC , Testing , Mail ,

Generator, RJS, I18n, Template , Engine .....

SINATRA LINGOGET / POST / PUT / DELETE , request

paramenters, response, views , helpers , configure , rack

Single file web-app

Single file web-app

Hello World!

HTTP actions

Routes

Views

Helpers

Filter

Configure

適用場合

• Web Service / API

• Tiny Web Application

•Rails Metal

Web Service / API

Requests per second: 81.09 [#/sec] (mean)Time per request: 12.332 [ms] (mean)

Requests per second: 450.56 [#/sec] (mean)Time per request: 2.219 [ms] (mean)

Rails action

Sinatra

（Ubuntu 8.04, Intel Atom N270 @1.60GHz）

Tiny Web Application

• simple

• cherry pick

• ActiveRecord / Datamapper

• Prototype / jQuery

追蹤 twitter 上痛恨 IE6 的人

• CodeIgniter - PHP framework

• 使用 Twitter API 追蹤特定關鍵字並展示

• LOC : 1000+

• NOT support CJK

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

10 行內收工..

• ORM

• Paginate

多寫了 40 行左右

Rails Metal with Sinatra

Core Code Middleware Mongrel

rack 是一種 middleware

Rack provides a minimal interface between webservers supporting Ruby and Ruby frameworks

http ProfilingMiddleware

SecurityMiddleware

CachingMiddleware

Handlerfor Rack

Core Code

$ rake middleware

Scaling Rails - Metal

• 使用 Rack 製作一個超級快的 action

• 將 Sinatra 當作一個 Metal app 使用

Performance

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 endend

class OldPollerController < ApplicationController def poller render :text => "Hello World!" endend

後者比前者快了 25 倍

Requests per second: 81.09 [#/sec] (mean)Time per request: 12.332 [x`x] (mean)

Requests per second: 163.75 [#/sec] (mean)Time per request: 6.107 [ms] (mean)

Rails action

Metal + Sinatra

（Ubuntu 8.04, Intel Atom N270 @1.60GHz）

一般狀況

Q & A

Resources

• Scaling Rails : Episode #14 Rack

• RailsCast: Episode #251 Rack Middleware

• Pragprog.com : Classy Web Development with Sinata

• Github / xdite : tweesage-message-wall