Ruby on Rack Small Talk

Rack is the minimal, modular, and adaptable interface that Ruby frameworks like Rails and Sinatra are built on. In this small talk we'll explore what makes Rack an adaptable interface for building Ruby applications and middleware, and then walk through a Rack application utilizing custom Rack middleware.

Transcript

1. ruby on RACK
2. “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” - Christian Neukirchen, author of rack
3. “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” - Christian Neukirchen, author of rack A Minimal api
4. a minimal api responds to #call
5. a minimal api single argument, the environment
6. a minimal api single argument, the environment an instance of Hash. all information about request.
7. a minimal api single argument, the environment the status code.
8. a minimal api single argument, the environment the headers.
9. a minimal api single argument, the environment the body.
10. “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” - Christian Neukirchen, author of rack A Minimal api
11. - Christian Neukirchen, author of rack “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” connecting web servers
12. web server interface Provides standard way for ruby apps to talk to web servers use with webrick, mongrel, thin, puma, etc.
13. web server interface
14. web server interface Abstracts away server stuff rack/lib/handler/webrick.rb handling ports.
15. web server interface Abstracts away server stuff rack/lib/handler/webrick.rb starts a server
16. web server interface Abstracts away server stuff rack/lib/handler/webrick.rb initializes the servlet
17. web server interface Abstracts away server stuff rack/lib/handler/webrick.rb runs the server
18. web server interface parsing http requests & responses rack/lib/request.rb
19. web server interface parsing http requests & responses
20. web server interface parsing http requests & responses
21. web server interface parsing http requests & responses rack/lib/response.rb
22. web server interface parsing http requests & responses
23. - Christian Neukirchen, author of rack “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” connecting web servers
24. - Christian Neukirchen, author of rack “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” ruby web frameworks
25. ruby web frameworks
26. ruby web frameworks
27. ruby web frameworks
28. ruby web frameworks
29. ruby web frameworks the simple protocol makes it easy to compose powerful applications by stacking rack apps and middleware on top of each other.
30. ruby web frameworks the simple protocol makes it easy to compose powerful applications by stacking rack apps and middleware on top of each other. Rack apps and middleware
31. rack apps & middleware middleware has an initializer that takes a rack app
32. rack apps & middleware has access to rack application during call time
33. rack apps & middleware it comes between calling the client and the server
34. rack apps & middleware it comes between calling the client and the server process the request before sending it to the server
35. rack apps & middleware it comes between calling the client and the server Process response before returning to the client
36. rack apps & middleware $ rake middleware
37. let’s build a rack application rack middleware Mounted Rack apps Static assets oauth with github user sessions routing template rendering features:
38. let’s build a rack application gems we’re using: omniauth erubis rack
39. our rack app config.ru
40. our rack app config.ru
41. our rack app config.ru
42. our rack app config.ru
43. our rack app config.ru
44. our rack app app.rb
45. our rack app app.rb
46. our rack app controllers/base_controller.rb router.rb
47. our rack app controllers/base_controller.rb router.rb iteratively construct rack apps
48. our rack app rack::builder
49. our rack app controllers/base_controller.rb router.rb adds middleware to the stack
50. our rack app rack::builder
51. our rack app
52. our rack app
53. our rack app
54. our rack app
55. our rack app
56. our rack app controllers/base_controller.rb router.rb dispatches to an application
57. our rack app rack::builder
58. our rack app
59. our rack app
60. our rack app
61. our rack app
62. our rack app
63. our rack app
64. our rack app
65. our rack app
66. our rack app
67. “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” - Christian Neukirchen, author of rack A Minimal api
68. - Christian Neukirchen, author of rack “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” connecting web servers
69. - Christian Neukirchen, author of rack “rack aims to provide a minimal api to develop web applications in Ruby, for connecting web servers supporting Ruby (like webrick, mongrel, etc) and ruby web frameworks (like rails, sinatra, etc).” ruby web frameworks
70. i’m meagan. meagan@8thlight.com @meaganewaller meaganwaller.com
71. sources & links chris neukirchen, blog post “introducing rack”: http://chneukirchen.org/blog/archive/2007/02/introducing-rack.html ruby on rack demo application repository: https://github.com/meaganewaller/ruby-on-rack-example Rails on Rack in the Ruby Guides http://guides.rubyonrails.org/v3.2.13/rails_on_rack.html http://rubylearning.com/blog/a-quick-introduction-to-rack/ A quick introduction to rack sinatra repository https://github.com/sinatra/sinatra/ forked rack with puts statements https://github.com/meaganewaller/rack