1 files changed, 24 insertions, 33 deletions

diff --git a/actionpack/lib/action_dispatch/http/parameters.rb b/actionpack/lib/action_dispatch/http/parameters.rb
index 25edd196c3..5b22cd1fcd 100644
--- a/actionpack/lib/action_dispatch/http/parameters.rb
+++ b/actionpack/lib/action_dispatch/http/parameters.rb
@@ -18,20 +18,19 @@ module ActionDispatch
             query_parameters.dup
           end
           params.merge!(path_parameters)
-          encode_params(params).with_indifferent_access
+          params.with_indifferent_access
         end
       end
       alias :params :parameters
 
       def path_parameters=(parameters) #:nodoc:
-        @symbolized_path_params = nil
-        @env.delete("action_dispatch.request.parameters")
-        @env["action_dispatch.request.path_parameters"] = parameters
+        @env.delete('action_dispatch.request.parameters')
+        @env[Routing::RouteSet::PARAMETERS_KEY] = parameters
       end
 
       # The same as <tt>path_parameters</tt> with explicitly symbolized keys.
       def symbolized_path_parameters
-        @symbolized_path_params ||= path_parameters.symbolize_keys
+        path_parameters
       end
 
       # Returns a hash with the \parameters used to form the \path of the request.
@@ -41,7 +40,7 @@ module ActionDispatch
       #
       # See <tt>symbolized_path_parameters</tt> for symbolized keys.
       def path_parameters
-        @env["action_dispatch.request.path_parameters"] ||= {}
+        @env[Routing::RouteSet::PARAMETERS_KEY] ||= {}
       end
 
       def reset_parameters #:nodoc:
@@ -50,39 +49,31 @@ module ActionDispatch
 
     private
 
+      # Convert nested Hash to HashWithIndifferentAccess
+      # and UTF-8 encode both keys and values in nested Hash.
+      #
       # TODO: Validate that the characters are UTF-8. If they aren't,
       # you'll get a weird error down the road, but our form handling
       # should really prevent that from happening
-      def encode_params(params)
-        if params.is_a?(String)
-          return params.force_encoding("UTF-8").encode!
-        elsif !params.is_a?(Hash)
-          return params
-        end
-
-        params.each do |k, v|
-          case v
-          when Hash
-            encode_params(v)
-          when Array
-            v.map! {|el| encode_params(el) }
+      def normalize_encode_params(params)
+        case params
+        when String
+          params.force_encoding(Encoding::UTF_8).encode!
+        when Hash
+          if params.has_key?(:tempfile)
+            UploadedFile.new(params)
           else
-            encode_params(v)
+            params.each_with_object({}) do |(key, val), new_hash|
+              new_key = key.is_a?(String) ? key.dup.force_encoding(Encoding::UTF_8).encode! : key
+              new_hash[new_key] = if val.is_a?(Array)
+                val.map! { |el| normalize_encode_params(el) }
+              else
+                normalize_encode_params(val)
+              end
+            end.with_indifferent_access
           end
-        end
-      end
-
-      # Convert nested Hash to ActiveSupport::HashWithIndifferentAccess
-      def normalize_parameters(value)
-        case value
-        when Hash
-          h = {}
-          value.each { |k, v| h[k] = normalize_parameters(v) }
-          h.with_indifferent_access
-        when Array
-          value.map { |e| normalize_parameters(e) }
         else
-          value
+          params
         end
       end
     end