Ruby on Rack Small Talk

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ruby on RACK

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“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

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a minimal api responds to #call

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a minimal api single argument, the environment

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a minimal api single argument, the environment an instance of Hash. all information about request.

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a minimal api single argument, the environment the status code.

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a minimal api single argument, the environment the headers.

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a minimal api single argument, the environment the body.

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- 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

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web server interface Provides standard way for ruby apps to talk to web servers use with webrick, mongrel, thin, puma, etc.

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web server interface

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web server interface Abstracts away server stuff rack/lib/handler/webrick.rb handling ports.

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web server interface Abstracts away server stuff rack/lib/handler/webrick.rb starts a server

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web server interface Abstracts away server stuff rack/lib/handler/webrick.rb initializes the servlet

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web server interface Abstracts away server stuff rack/lib/handler/webrick.rb runs the server

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web server interface parsing http requests & responses rack/lib/request.rb

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web server interface parsing http requests & responses

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web server interface parsing http requests & responses

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web server interface parsing http requests & responses rack/lib/response.rb

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web server interface parsing http requests & responses

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ruby web frameworks

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ruby web frameworks

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ruby web frameworks

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ruby web frameworks

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ruby web frameworks the simple protocol makes it easy to compose powerful applications by stacking rack apps and middleware on top of each other.

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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

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rack apps & middleware middleware has an initializer that takes a rack app

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rack apps & middleware has access to rack application during call time

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rack apps & middleware it comes between calling the client and the server

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rack apps & middleware it comes between calling the client and the server process the request before sending it to the server

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rack apps & middleware it comes between calling the client and the server Process response before returning to the client

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rack apps & middleware $ rake middleware

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let’s build a rack application rack middleware Mounted Rack apps Static assets oauth with github user sessions routing template rendering features:

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let’s build a rack application gems we’re using: omniauth erubis rack

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our rack app config.ru

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our rack app config.ru

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our rack app config.ru

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our rack app config.ru

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our rack app config.ru

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our rack app app.rb

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our rack app app.rb

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our rack app controllers/base_controller.rb router.rb

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our rack app controllers/base_controller.rb router.rb iteratively construct rack apps

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our rack app rack::builder

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our rack app controllers/base_controller.rb router.rb adds middleware to the stack

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our rack app rack::builder

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app controllers/base_controller.rb router.rb dispatches to an application

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our rack app rack::builder

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app

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our rack app

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i’m meagan. [email protected] @meaganewaller meaganwaller.com

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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