1 files changed, 29 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/request/utils.rb b/actionpack/lib/action_dispatch/request/utils.rb
index 8836ba6d59..01fd5efd5e 100644
--- a/actionpack/lib/action_dispatch/request/utils.rb
+++ b/actionpack/lib/action_dispatch/request/utils.rb
@@ -5,6 +5,35 @@ module ActionDispatch
       mattr_accessor :perform_deep_munge
       self.perform_deep_munge = true
 
+      def self.normalize_encode_params(params)
+        ParamEncoder.normalize_encode_params params
+      end
+
+      class ParamEncoder
+        # Convert nested Hash to HashWithIndifferentAccess.
+        #
+        def self.normalize_encode_params(params)
+          case params
+          when Array
+            handle_array params
+          when Hash
+            if params.has_key?(:tempfile)
+              ActionDispatch::Http::UploadedFile.new(params)
+            else
+              params.each_with_object({}) do |(key, val), new_hash|
+                new_hash[key] = normalize_encode_params(val)
+              end.with_indifferent_access
+            end
+          else
+            params
+          end
+        end
+
+        def self.handle_array(params)
+          params.map! { |el| normalize_encode_params(el) }
+        end
+      end
+
       class << self
         # Remove nils from the params hash
         def deep_munge(hash)