1 files changed, 31 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/routing/segments.rb b/actionpack/lib/action_controller/routing/segments.rb
index f6b03edcca..5dda3d4d00 100644
--- a/actionpack/lib/action_controller/routing/segments.rb
+++ b/actionpack/lib/action_controller/routing/segments.rb
@@ -308,5 +308,36 @@ module ActionController
         end
       end
     end
+    
+    # The OptionalFormatSegment allows for any resource route to have an optional
+    # :format, which decreases the amount of routes created by 50%.
+    class OptionalFormatSegment < DynamicSegment
+    
+      def initialize(key = nil, options = {})
+        super(:format, {:optional => true}.merge(options))            
+      end
+    
+      def interpolation_chunk
+        "." + super
+      end
+    
+      def regexp_chunk
+        '(\.[^/?\.]+)?'
+      end
+    
+      def to_s
+        '(.:format)?'
+      end
+    
+      #the value should not include the period (.)
+      def match_extraction(next_capture)
+        %[
+          if (m = match[#{next_capture}])
+            params[:#{key}] = URI.unescape(m.from(1))
+          end
+        ]
+      end
+    end
+    
   end
 end