rails/actionpack/lib/action_controller/metal/compatibility.rb

module ActionController
  module Compatibility
    extend ActiveSupport::Concern

    include AbstractController::Compatibility

    class ::ActionController::ActionControllerError < StandardError #:nodoc:
    end

    # Temporary hax
    included do
      ::ActionController::UnknownAction = ::AbstractController::ActionNotFound
      ::ActionController::DoubleRenderError = ::AbstractController::DoubleRenderError

      cattr_accessor :session_options
      self.session_options = {}

      cattr_accessor :relative_url_root
      self.relative_url_root = ENV['RAILS_RELATIVE_URL_ROOT']

      class << self
        delegate :default_charset=, :to => "ActionDispatch::Response"
      end

      # cattr_reader :protected_instance_variables
      cattr_accessor :protected_instance_variables
      self.protected_instance_variables = %w(@assigns @performed_redirect @performed_render
                                             @variables_added @request_origin @url
                                             @parent_controller @action_name
                                             @before_filter_chain_aborted @_headers @_params
                                             @_response)

      # Controls the resource action separator
      cattr_accessor :resource_action_separator
      self.resource_action_separator = "/"

      cattr_accessor :use_accept_header
      self.use_accept_header = true

      self.page_cache_directory = defined?(Rails.public_path) ? Rails.public_path : ""

      # Prepends all the URL-generating helpers from AssetHelper. This makes it possible to easily move javascripts, stylesheets,
      # and images to a dedicated asset server away from the main web server. Example:
      #   ActionController::Base.asset_host = "http://assets.example.com"
      cattr_accessor :asset_host

      cattr_accessor :ip_spoofing_check
      self.ip_spoofing_check = true

      cattr_accessor :trusted_proxies
    end

    # For old tests
    def initialize_template_class(*) end
    def assign_shortcuts(*) end

    # TODO: Remove this after we flip
    def template
      @template ||= view_context
    end

    def process_action(*)
      template
      super
    end

    module ClassMethods
      def consider_all_requests_local
        ActiveSupport::Deprecation.warn "ActionController::Base.consider_all_requests_local is deprecated, " <<
          "use Rails.application.config.consider_all_requests_local instead"
        Rails.application.config.consider_all_requests_local
      end

      def consider_all_requests_local=(value)
        ActiveSupport::Deprecation.warn "ActionController::Base.consider_all_requests_local= is no longer effective. " <<
          "Please configure it on your application with config.consider_all_requests_local="
        Rails.application.config.consider_all_requests_local = value
      end

      def allow_concurrency
        ActiveSupport::Deprecation.warn "ActionController::Base.allow_concurrency is deprecated, " <<
          "use Rails.application.config.allow_concurrency instead"
        Rails.application.config.allow_concurrency
      end

      def allow_concurrency=(value)
        ActiveSupport::Deprecation.warn "ActionController::Base.allow_concurrency= is no longer effective. " <<
          "Please configure it on your application with config.allow_concurrency="
        Rails.application.config.allow_concurrency = value
      end

      def rescue_action(env)
        raise env["action_dispatch.rescue.exception"]
      end

      # Defines the storage option for cached fragments
      def cache_store=(store_option)
        @@cache_store = ActiveSupport::Cache.lookup_store(store_option)
      end
    end

    delegate :consider_all_requests_local, :consider_all_requests_local=,
             :allow_concurrency, :allow_concurrency=, :to => :"self.class"

    def render_to_body(options)
      if options.is_a?(Hash) && options.key?(:template)
        options[:template].sub!(/^\//, '')
      end

      options[:text] = nil if options.delete(:nothing) == true
      options[:text] = " " if options.key?(:text) && options[:text].nil?

      super || " "
    end

    def _handle_method_missing
      method_missing(@_action_name.to_sym)
    end

    def method_for_action(action_name)
      super || (respond_to?(:method_missing) && "_handle_method_missing")
    end

    def performed?
      response_body
    end

    # ==== Request only view path switching ====
    def append_view_path(path)
      view_paths.push(*path)
    end

    def prepend_view_path(path)
      view_paths.unshift(*path)
    end

    def view_paths
      view_context.view_paths
    end
  end
end