class ActionController::Metal


other features you can bring into your metal controller.
You can refer to the modules included in ActionController::Base to see
== Other Helpers
end
end
redirect_to root_url
def index
include Rails.application.routes.url_helpers
include ActionController::Redirecting
class HelloController < ActionController::Metal
To add redirection helpers to your metal controller, do the following:
== Redirection Helpers
end
end
render “hello/index”
def index
append_view_path “#{Rails.root}/app/views”
include ActionView::Layouts
include AbstractController::Rendering
class HelloController < ActionController::Metal
can do the following:
add the render helpers you’re used to having in a normal controller, you
response_body=, content_type=, and status=. To
views, partials, or other responses aside from explicitly calling of
ActionController::Metal by default provides no utilities for rendering
== Rendering Helpers
router to dispatch to.
The action method returns a valid Rack application for the Rails
get ‘hello’, to: HelloController.action(:index)
something like this to config/routes.rb:
And then to route requests to your metal controller, you would add
end
end
self.response_body = “Hello World!”
def index
class HelloController < ActionController::Metal
A sample metal controller might look like this:
ActionController::Base.
valid Rack interface without the additional niceties provided by
ActionController::Metal is the simplest possible controller, providing a

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

Returns a Rack endpoint for the given action name. 
def self.action(name, klass = ActionDispatch::Request)
  if middleware_stack.any?
    middleware_stack.build(name) do |env|
      new.dispatch(name, klass.new(env))
    end
  else
    lambda { |env| new.dispatch(name, klass.new(env)) }
  end
end

def self.call(env)

+env+'s +action_dispatch.request.path_parameters+ key.
Makes the controller a Rack endpoint that runs the action in the given 
def self.call(env)
  req = ActionDispatch::Request.new env
  action(req.path_parameters[:action]).call(env)
end

def self.controller_name

* string
==== Returns

Namespaces are left out, so Admin::PostsController returns posts as well.
Controller. For instance, PostsController returns posts.
Returns the last part of the controller's name, underscored, without the ending 
def self.controller_name
  @controller_name ||= name.demodulize.sub(/Controller$/, '').underscore
end

def self.inherited(base) # :nodoc:

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

def self.middleware

Alias for +middleware_stack+. 
def self.middleware
  middleware_stack
end

def self.use(*args, &block)

middleware stack.
Pushes the given Rack middleware and its arguments to the bottom of the 
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) #:nodoc:

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

def env 

def env
  @_env ||= {}
end

def initialize 

def initialize
  @_headers = {"Content-Type" => "text/html"}
  @_status = 200
  @_request = nil
  @_response = nil
  @_routes = nil
  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 performed?

Tests if render or redirect has already happened. 
def performed?
  response_body || (response && response.committed?)
end

def response_body=(body) 

def response_body=(body)
  body = [body] unless body.nil? || body.respond_to?(:each)
  super
end

def status 

def status
  @_status
end

def status=(status) 

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

def to_a #:nodoc:

:nodoc: 
def to_a #:nodoc:
  response ? response.to_a : [status, headers, response_body]
end

def url_for(string)

Basic url_for that can be overridden for more robust functionality 
def url_for(string)
  string
end