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8 Minutes On Rack

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From Ruby Manor 2008

Publicada em: Tecnologia
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  • DOWNLOAD FULL BOOKS, INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
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  • I already ruby on rails app with me.Now I wanna integrate my app with JRuby in order to get asynchronous feature.How do I proceed?
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  • nice and simple introductory guide. Even a PHP moron like me could get it :-)
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8 Minutes On Rack

  1. 1. 8 minutes on Rack Dan Webb (dan@danwebb.net)
  2. 2. Web Framework
  3. 3. Web Server
  4. 4. Library
  5. 5. A Convention
  6. 6. If you have a Ruby object...
  7. 7. that has a call method which takes one argument... app.call(env)
  8. 8. and that method returns an array with 3 elements... [200, { 'Content-Type' => 'text/plain' }, 'Hello World!']
  9. 9. then you can connect it to any web server that supports Rack require 'thin' Rack::Handler::Thin.run(app, :Port => 4000)
  10. 10. and you've got yourself a web application
  11. 11. Fin
  12. 12. app = Proc.new do |env| [200, { 'Content-Type' => 'text/plain' }, 'Hello World!'] end require 'rubygems' require 'thin' Rack::Handler::Thin.run(app, :Port => 4000)
  13. 13. class HelloWorld def initialize(name) @name = name end def call(env) [200, { 'Content-Type' => 'text/plain' }, "Hello #{@name}!"] end end require 'rubygems' require 'rack' Rack::Handler::Mongrel.run(HelloWorld.new("Dan"), :Port => 4000)
  14. 14. // Courtesy of Pratik Naik! #include "ruby.h" VALUE method_call(VALUE self, VALUE env) { VALUE response = rb_ary_new(); VALUE headers = rb_hash_new(); rb_hash_aset(headers, rb_str_new2("Content-Type"), rb_str_new2("text/plain")); rb_ary_push(response, INT2NUM(200)); rb_ary_push(response, headers); rb_ary_push(response, rb_str_new2("Hello World!")); return response; } void Init_rock() { VALUE Rock = rb_define_class("Rock", rb_cObject); rb_define_method(Rock, "call", method_call, 1); } // run.rb require 'rock' require 'thin' Rack::Handler::Thin.run Rock.new, :Port => 4000
  15. 15. def call(env)
  16. 16. { "SERVER_NAME"=>"localhost", "HTTP_ACCEPT_ENCODING"=>"gzip,deflate", "HTTP_USER_AGENT"=>"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en- GB; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4", "PATH_INFO"=>"/", "SCRIPT_NAME"=>"", "SERVER_PROTOCOL"=>"HTTP/1.1", "HTTP_ACCEPT_LANGUAGE"=>"en-gb,en;q=0.5", "HTTP_HOST"=>"localhost:4000", "REMOTE_ADDR"=>"127.0.0.1", "HTTP_KEEP_ALIVE"=>"300", "REQUEST_PATH"=>"/", "SERVER_SOFTWARE"=>"thin 0.8.2 codename Double Margarita", "HTTP_ACCEPT_CHARSET"=>"ISO-8859-1,utf-8;q=0.7,*;q=0.7", "HTTP_VERSION"=>"HTTP/1.1", "REQUEST_URI"=>"/", "SERVER_PORT"=>"4000", "QUERY_STRING"=>"", "GATEWAY_INTERFACE"=>"CGI/1.2", "HTTP_ACCEPT"=>"text/html,application/xhtml+xml,application/xml;q=0.9, */*;q=0.8", "HTTP_CONNECTION"=>"keep-alive", "REQUEST_METHOD"=>"GET" }
  17. 17. [200, { 'Content-Type' => 'text/plain' }, "Hello #{@name}!"] Status Code
  18. 18. [200, { 'Content-Type' => 'text/plain' }, "Hello #{@name}!"] HTTP Headers
  19. 19. [200, { 'Content-Type' => 'text/plain' }, "Hello #{@name}!"] Response Body
  20. 20. Response body can be any object that respond_to?(:each) file = File.new('myfile.xml') [200, { 'Content-Type' => 'application/xml' }, file]
  21. 21. class StreamingFile def initialize(file) @file = file end def length File.size(@file) end def last_modified File.mtime(@file).rfc822 end def each File.open(@file, "rb") do |file| while part = file.read(8192) yield part end File.delete(@file) end end
  22. 22. [200, { 'Content-Type' => 'audio/mp3', 'Content-Length' => file.length.to_s }, file]
  23. 23. Duck typing! • Streaming • Clean up after response sent • Complex responses • Loads more...
  24. 24. Why?
  25. 25. Common interface
  26. 26. • Passenger • Mongrel • CGI • SCGI • FastCGI • Thin • Ebb • Fuzed • Webrick • Litespeed
  27. 27. Write once, serve however...
  28. 28. Convienient way to write micro apps
  29. 29. Example: Development Server
  30. 30. class StaticOrRedirect def initialize(options={}) @redirect_base = options[:redirect_base] root = options[:root] || Dir.pwd @file_server = Rack::File.new(root) end def call(env) path = env["PATH_INFO"] resp = @file_server.call(env) if resp.first == 404 [302, { 'Content-Type' => 'text/plain', 'Location' => "#{@redirect_base}#{env['PATH_INFO']}" }, 'Not here!'] else resp end end end Rack::Handler::Thin.run( StaticOrRedirect.new( :redirect_base => 'http://bbc.co.uk' ) )
  31. 31. There's more... • The Rack Gem • Middleware • Rack and Passenger • rackup
  32. 32. rack.rubyforge.org
  33. 33. danwebb.net
  34. 34. Questions?

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