class ActionController::Metal

can dispatch directly to the action returned by FooController.action(:index).
given action. Other rack builders, such as Rack::Builder, Rack::URLMap, and the Rails router,
ActionController::Metal provides an #action method that returns a valid Rack application for a
In AbstractController, dispatching is triggered directly by calling #process on a new controller.
ActionController::Metal provides a way to get a valid Rack application from a controller.

def self.action(name, klass = ActionDispatch::Request)

Proc:: A rack application
==== Returns

action<#to_s>:: An action name
==== Parameters

for the same action.
multiple calls into MyController.action will return the same object
Return a rack endpoint for the given action. Memoize the endpoint, so

def self.action(name, klass = ActionDispatch::Request)
  middleware_stack.build(name.to_s) do |env|
    new.dispatch(name, klass.new(env))
  end
end

def self.call(env)

def self.call(env)
  action(env['action_dispatch.request.path_parameters'][:action]).call(env)
end

def self.controller_name

String
==== Returns

controller_name
"Controller". For instance, MyApp::MyPostsController would return "my_posts" for
Returns the last part of the controller's name, underscored, without the ending

def self.controller_name
  @controller_name ||= self.name.demodulize.sub(/Controller$/, '').underscore
end

def self.inherited(base)

def self.inherited(base)
  base.middleware_stack = self.middleware_stack.dup
  super
end

def self.middleware

def self.middleware
  middleware_stack
end

def self.use(*args, &block)

def self.use(*args, &block)
  middleware_stack.use(*args, &block)
end

def content_type

def content_type
  headers["Content-Type"]
end

def content_type=(type)

def content_type=(type)
  headers["Content-Type"] = type.to_s
end

def controller_name

Delegates to the class' #controller_name

def controller_name
  self.class.controller_name
end

def dispatch(name, request)

:api: private

def dispatch(name, request)
  @_request = request
  @_env = request.env
  @_env['action_controller.instance'] = self
  process(name)
  to_a
end

def initialize(*)

def initialize(*)
  @_headers = {"Content-Type" => "text/html"}
  @_status = 200
  super
end

def location

def location
  headers["Location"]
end

def location=(url)

def location=(url)
  headers["Location"] = url
end

def params

def params
  @_params ||= request.parameters
end

def params=(val)

def params=(val)
  @_params = val
end

def response_body=(val)

def response_body=(val)
  body = val.respond_to?(:each) ? val : [val]
  super body
end

def status

def status
  @_status
end

def status=(status)

def status=(status)
  @_status = Rack::Utils.status_code(status)
end

def to_a