All AD modules are "deferrable"

actionpack/lib/action_controller/metal/rack_delegation.rb

@@ -1,3 +1,6 @@
+require 'action_dispatch/http/request'
+require 'action_dispatch/http/response'
+
 module ActionController
   module RackDelegation
     extend ActiveSupport::Concern

actionpack/lib/action_dispatch.rb

@@ -34,12 +34,12 @@ end
 module ActionDispatch
   extend ActiveSupport::Autoload
 
-  autoload_under 'http' do
-    autoload :Request
-    autoload :Response
-  end
-
   deferrable do
+    autoload_under 'http' do
+      autoload :Request
+      autoload :Response
+    end
+
     autoload_under 'middleware' do
       autoload :Callbacks
       autoload :ParamsParser
@@ -71,8 +71,6 @@ module ActionDispatch
       autoload :TestResponse
     end
   end
-
-  autoload :HTML, 'action_controller/vendor/html-scanner'
 end
 
 autoload :Mime, 'action_dispatch/http/mime_type'

actionpack/lib/action_dispatch/middleware/params_parser.rb

@@ -1,4 +1,5 @@
 require 'active_support/json'
+require 'action_dispatch/http/request'
 
 module ActionDispatch
   class ParamsParser

actionpack/lib/action_dispatch/middleware/session/abstract_store.rb

@@ -1,4 +1,5 @@
 require 'rack/utils'
+require 'rack/request'
 
 module ActionDispatch
   module Session

actionpack/lib/action_dispatch/middleware/session/cookie_store.rb

@@ -1,4 +1,5 @@
-require "active_support/core_ext/hash/keys"
+require 'active_support/core_ext/hash/keys'
+require 'rack/request'
 
 module ActionDispatch
   module Session
@@ -49,7 +50,7 @@ module ActionDispatch
         :expire_after => nil,
         :httponly     => true
       }.freeze
-      
+
       class OptionsHash < Hash
         def initialize(by, env, default_options)
           @session_data = env[CookieStore::ENV_SESSION_KEY]
@@ -60,7 +61,7 @@ module ActionDispatch
           key == :id ? @session_data[:session_id] : super(key)
         end
       end
-      
+
       ENV_SESSION_KEY = "rack.session".freeze
       ENV_SESSION_OPTIONS_KEY = "rack.session.options".freeze
       HTTP_SET_COOKIE = "Set-Cookie".freeze
@@ -102,7 +103,7 @@ module ActionDispatch
       def call(env)
         env[ENV_SESSION_KEY] = AbstractStore::SessionHash.new(self, env)
         env[ENV_SESSION_OPTIONS_KEY] = OptionsHash.new(self, env, @default_options)
-        
+
         status, headers, body = @app.call(env)
 
         session_data = env[ENV_SESSION_KEY]

actionpack/lib/action_dispatch/middleware/show_exceptions.rb

@@ -1,4 +1,5 @@
-require "active_support/core_ext/exception"
+require 'active_support/core_ext/exception'
+require 'action_dispatch/http/request'
 
 module ActionDispatch
   class ShowExceptions

actionpack/lib/action_dispatch/testing/assertions/dom.rb

@@ -1,3 +1,5 @@
+require 'action_controller/vendor/html-scanner'
+
 module ActionDispatch
   module Assertions
     module DomAssertions
@@ -15,7 +17,7 @@ module ActionDispatch
 
         assert_block(full_message) { expected_dom == actual_dom }
       end
-      
+
       # The negated form of +assert_dom_equivalent+.
       #
       # ==== Examples

actionpack/lib/action_dispatch/testing/assertions/selector.rb

@@ -1,3 +1,5 @@
+require 'action_controller/vendor/html-scanner'
+
 #--
 # Copyright (c) 2006 Assaf Arkin (http://labnotes.org)
 # Under MIT and/or CC By license.
@@ -16,7 +18,7 @@ module ActionDispatch
     #
     # Use +css_select+ to select elements without making an assertions, either
     # from the response HTML or elements selected by the enclosing assertion.
-    # 
+    #
     # In addition to HTML responses, you can make the following assertions:
     # * +assert_select_rjs+ - Assertions on HTML content of RJS update and insertion operations.
     # * +assert_select_encoded+ - Assertions on HTML encoded inside XML, for example for dealing with feed item descriptions.
@@ -53,8 +55,8 @@ module ActionDispatch
       #   end
       #
       #   # Selects all list items in unordered lists
-      #   items = css_select("ul>li") 
-      #      
+      #   items = css_select("ul>li")
+      #
       #   # Selects all form tags and then all inputs inside the form
       #   forms = css_select("form")
       #   forms.each do |form|
@@ -212,7 +214,7 @@ module ActionDispatch
           # Otherwise just operate on the response document.
           root = response_from_page_or_rjs
         end
-        
+
         # First or second argument is the selector: string and we pass
         # all remaining arguments. Array and we pass the argument. Also
         # accepts selector itself.
@@ -225,7 +227,7 @@ module ActionDispatch
             selector = arg
           else raise ArgumentError, "Expecting a selector as the first argument"
         end
-        
+
         # Next argument is used for equality tests.
         equals = {}
         case arg = args.shift
@@ -315,10 +317,10 @@ module ActionDispatch
         # Returns all matches elements.
         matches
       end
-      
+
       def count_description(min, max) #:nodoc:
         pluralize = lambda {|word, quantity| word << (quantity == 1 ? '' : 's')}
-        
+
         if min && max && (max != min)
           "between #{min} and #{max} elements"
         elsif min && !(min == 1 && max == 1)
@@ -327,7 +329,7 @@ module ActionDispatch
           "at most #{max} #{pluralize['element', max]}"
         end
       end
-      
+
       # :call-seq:
       #   assert_select_rjs(id?) { |elements| ... }
       #   assert_select_rjs(statement, id?) { |elements| ... }
@@ -344,7 +346,7 @@ module ActionDispatch
       # that update or insert an element with that identifier.
       #
       # Use the first argument to narrow down assertions to only statements
-      # of that type. Possible values are <tt>:replace</tt>, <tt>:replace_html</tt>, 
+      # of that type. Possible values are <tt>:replace</tt>, <tt>:replace_html</tt>,
       # <tt>:show</tt>, <tt>:hide</tt>, <tt>:toggle</tt>, <tt>:remove</tta>,
       # <tt>:insert_html</tt> and <tt>:redirect</tt>.
       #
@@ -494,7 +496,7 @@ module ActionDispatch
       #       end
       #     end
       #   end
-      #   
+      #
       #
       #   # Selects all paragraph tags from within the description of an RSS feed
       #   assert_select_feed :rss, 2.0 do

actionpack/lib/action_dispatch/testing/assertions/tag.rb

@@ -1,3 +1,5 @@
+require 'action_controller/vendor/html-scanner'
+
 module ActionDispatch
   module Assertions
     # Pair of assertions to testing elements in the HTML output of the response.

actionpack/lib/action_view/helpers/sanitize_helper.rb

@@ -1,3 +1,4 @@
+require 'action_controller/vendor/html-scanner'
 require 'action_view/helpers/tag_helper'
 
 module ActionView