7 files changed, 35 insertions, 15 deletions

diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index ace1aabe03..329798e84f 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -119,6 +119,11 @@ module ActionController
       headers["Location"] = url
     end
 
+    # basic url_for that can be overridden for more robust functionality
+    def url_for(string)
+      string
+    end
+
     def status
       @_status
     end
diff --git a/actionpack/lib/action_controller/metal/head.rb b/actionpack/lib/action_controller/metal/head.rb
index 2b4a3b9392..8abcad55a2 100644
--- a/actionpack/lib/action_controller/metal/head.rb
+++ b/actionpack/lib/action_controller/metal/head.rb
@@ -2,8 +2,6 @@ module ActionController
   module Head
     extend ActiveSupport::Concern
 
-    include ActionController::UrlFor
-
     # Return a response that has no content (merely headers). The options
     # argument is interpreted to be a hash of header names and values.
     # This allows you to easily return a response that consists only of
@@ -27,8 +25,8 @@ module ActionController
 
       self.status = status
       self.location = url_for(location) if location
-      self.content_type = Mime[formats.first]
+      self.content_type = Mime[formats.first] if formats
       self.response_body = " "
     end
   end
-end
\ No newline at end of file
+end
diff --git a/actionpack/lib/action_controller/metal/rendering.rb b/actionpack/lib/action_controller/metal/rendering.rb
index 86bb810947..e524e546ad 100644
--- a/actionpack/lib/action_controller/metal/rendering.rb
+++ b/actionpack/lib/action_controller/metal/rendering.rb
@@ -2,7 +2,6 @@ module ActionController
   module Rendering
     extend ActiveSupport::Concern
 
-    include ActionController::RackDelegation
     include AbstractController::Rendering
 
     # Before processing, set the request formats in current controller formats.
diff --git a/actionpack/lib/action_controller/metal/responder.rb b/actionpack/lib/action_controller/metal/responder.rb
index 851925e1b7..38d32211cc 100644
--- a/actionpack/lib/action_controller/metal/responder.rb
+++ b/actionpack/lib/action_controller/metal/responder.rb
@@ -161,6 +161,8 @@ module ActionController #:nodoc:
         display resource.errors, :status => :unprocessable_entity
       elsif post?
         display resource, :status => :created, :location => api_location
+      elsif has_empty_resource_definition?
+        display empty_resource, :status => :ok
       else
         head :ok
       end
@@ -221,5 +223,23 @@ module ActionController #:nodoc:
     def default_action
       @action ||= ACTIONS_FOR_VERBS[request.request_method_symbol]
     end
+
+    # Check whether resource needs a specific definition of empty resource to be valid
+    #
+    def has_empty_resource_definition?
+      respond_to?("empty_#{format}_resource")
+    end
+
+    # Delegate to proper empty resource method
+    #
+    def empty_resource
+      send("empty_#{format}_resource")
+    end
+
+    # Return a valid empty JSON resource
+    #
+    def empty_json_resource
+      "{}"
+    end
   end
 end
diff --git a/actionpack/lib/action_controller/metal/streaming.rb b/actionpack/lib/action_controller/metal/streaming.rb
index 2013da3adb..312dc8eb3e 100644
--- a/actionpack/lib/action_controller/metal/streaming.rb
+++ b/actionpack/lib/action_controller/metal/streaming.rb
@@ -101,10 +101,6 @@ module ActionController #:nodoc:
       #   send_data image.data, :type => image.content_type, :disposition => 'inline'
       #
       # See +send_file+ for more information on HTTP Content-* headers and caching.
-      #
-      # <b>Tip:</b> if you want to stream large amounts of on-the-fly generated
-      # data to the browser, then use <tt>render :text => proc { ... }</tt>
-      # instead. See ActionController::Base#render for more information.
       def send_data(data, options = {}) #:doc:
         send_file_headers! options.dup
         render options.slice(:status, :content_type).merge(:text => data)
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index 0ade42ba2d..c5a661f2b0 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -21,10 +21,10 @@ module ActionController
       paths   = app.config.paths
       options = app.config.action_controller
 
-      options.assets_dir           ||= paths.public.to_a.first
-      options.javascripts_dir      ||= paths.public.javascripts.to_a.first
-      options.stylesheets_dir      ||= paths.public.stylesheets.to_a.first
-      options.page_cache_directory ||= paths.public.to_a.first
+      options.assets_dir           ||= paths["public"].first
+      options.javascripts_dir      ||= paths["public/javascripts"].first
+      options.stylesheets_dir      ||= paths["public/stylesheets"].first
+      options.page_cache_directory ||= paths["public"].first
 
       # make sure readers methods get compiled
       options.asset_path           ||= nil
diff --git a/actionpack/lib/action_controller/railties/paths.rb b/actionpack/lib/action_controller/railties/paths.rb
index fa71d55946..7a59d4f2f3 100644
--- a/actionpack/lib/action_controller/railties/paths.rb
+++ b/actionpack/lib/action_controller/railties/paths.rb
@@ -5,12 +5,14 @@ module ActionController
         Module.new do
           define_method(:inherited) do |klass|
             super(klass)
+
             if namespace = klass.parents.detect {|m| m.respond_to?(:_railtie) }
-              klass.helpers_path = namespace._railtie.config.paths.app.helpers.to_a
+              paths = namespace._railtie.paths["app/helpers"].existent
             else
-              klass.helpers_path = app.config.helpers_paths
+              paths = app.config.helpers_paths
             end
 
+            klass.helpers_path = paths
             klass.helper :all if klass.superclass == ActionController::Base
           end
         end