2 files changed, 27 insertions, 5 deletions
diff --git a/actionpack/lib/action_controller/caching/fragments.rb b/actionpack/lib/action_controller/caching/fragments.rb
index 806e6a1750..00a7f034d3 100644
--- a/actionpack/lib/action_controller/caching/fragments.rb
+++ b/actionpack/lib/action_controller/caching/fragments.rb
@@ -36,8 +36,8 @@ module ActionController #:nodoc:
 
       def fragment_for(buffer, name = {}, options = nil, &block) #:nodoc:
         if perform_caching
-          if fragment_exist?(name,options)
-            buffer.concat(read_fragment(name, options).html_safe!)
+          if fragment_exist?(name, options)
+            buffer.safe_concat(read_fragment(name, options))
           else
             pos = buffer.length
             block.call
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index 6b94c32b2a..42257f9400 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -37,11 +37,33 @@ module ActionController
       ActionController::Base.view_paths = view_path if ActionController::Base.view_paths.blank?
     end
 
+    class MetalMiddlewareBuilder
+      def initialize(metals)
+        @metals = metals
+      end
+
+      def new(app)
+        ActionDispatch::Cascade.new(@metals, app)
+      end
+
+      def name
+        ActionDispatch::Cascade.name
+      end
+      alias_method :to_s, :name
+    end
+
     initializer "action_controller.initialize_metal" do |app|
-      Rails::Rack::Metal.requested_metals = app.config.metals
+      metal_root = "#{Rails.root}/app/metal"
+      load_list = app.config.metals || Dir["#{metal_root}/**/*.rb"]
+
+      metals = load_list.map { |metal|
+        metal = File.basename(metal.gsub("#{metal_root}/", ''), '.rb')
+        require_dependency metal
+        metal.camelize.constantize
+      }.compact
 
-      app.config.middleware.insert_before(:"ActionDispatch::ParamsParser",
-        Rails::Rack::Metal, :if => Rails::Rack::Metal.metals.any?)
+      middleware = MetalMiddlewareBuilder.new(metals)
+      app.config.middleware.insert_before(:"ActionDispatch::ParamsParser", middleware)
     end
 
     # # Prepare dispatcher callbacks and run 'prepare' callbacks