1 files changed, 45 insertions, 33 deletions

diff --git a/actionpack/lib/action_dispatch/http/parameters.rb b/actionpack/lib/action_dispatch/http/parameters.rb
index c2f05ecc86..27fadb708e 100644
--- a/actionpack/lib/action_dispatch/http/parameters.rb
+++ b/actionpack/lib/action_dispatch/http/parameters.rb
@@ -1,27 +1,41 @@
-require 'active_support/core_ext/hash/keys'
-require 'active_support/core_ext/hash/indifferent_access'
-
 module ActionDispatch
   module Http
     module Parameters
       PARAMETERS_KEY = 'action_dispatch.request.path_parameters'
 
+      DEFAULT_PARSERS = {
+        Mime::JSON => lambda { |raw_post|
+          data = ActiveSupport::JSON.decode(raw_post)
+          data.is_a?(Hash) ? data : {:_json => data}
+        }
+      }
+
+      def self.included(klass)
+        class << klass
+          attr_accessor :parameter_parsers
+        end
+
+        klass.parameter_parsers = DEFAULT_PARSERS
+      end
       # Returns both GET and POST \parameters in a single hash.
       def parameters
-        @env["action_dispatch.request.parameters"] ||= begin
-          params = begin
-            request_parameters.merge(query_parameters)
-          rescue EOFError
-            query_parameters.dup
-          end
-          params.merge!(path_parameters)
-        end
+        params = get_header("action_dispatch.request.parameters")
+        return params if params
+
+        params = begin
+                   request_parameters.merge(query_parameters)
+                 rescue EOFError
+                   query_parameters.dup
+                 end
+        params.merge!(path_parameters)
+        set_header("action_dispatch.request.parameters", params)
+        params
       end
       alias :params :parameters
 
       def path_parameters=(parameters) #:nodoc:
-        @env.delete('action_dispatch.request.parameters')
-        @env[PARAMETERS_KEY] = parameters
+        delete_header('action_dispatch.request.parameters')
+        set_header PARAMETERS_KEY, parameters
       end
 
       # Returns a hash with the \parameters used to form the \path of the request.
@@ -29,31 +43,29 @@ module ActionDispatch
       #
       #   {'action' => 'my_action', 'controller' => 'my_controller'}
       def path_parameters
-        @env[PARAMETERS_KEY] ||= {}
+        get_header(PARAMETERS_KEY) || {}
       end
 
-    private
+      private
 
-      # Convert nested Hash to HashWithIndifferentAccess.
-      #
-      def normalize_encode_params(params)
-        case params
-        when Hash
-          if params.has_key?(:tempfile)
-            UploadedFile.new(params)
-          else
-            params.each_with_object({}) do |(key, val), new_hash|
-              new_hash[key] = if val.is_a?(Array)
-                val.map! { |el| normalize_encode_params(el) }
-              else
-                normalize_encode_params(val)
-              end
-            end.with_indifferent_access
-          end
-        else
-          params
+      def parse_formatted_parameters(parsers)
+        return yield if content_length.zero?
+
+        strategy = parsers.fetch(content_mime_type) { return yield }
+
+        begin
+          strategy.call(raw_post)
+        rescue => e # JSON or Ruby code block errors
+          my_logger = logger || ActiveSupport::Logger.new($stderr)
+          my_logger.debug "Error occurred while parsing request parameters.\nContents:\n\n#{raw_post}"
+
+          raise ParamsParser::ParseError.new(e.message, e)
         end
       end
+
+      def params_parsers
+        ActionDispatch::Request.parameter_parsers
+      end
     end
   end
 end