2 files changed, 13 insertions, 4 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/cookies.rb b/actionpack/lib/action_dispatch/middleware/cookies.rb
index 2f46a375b1..2e9f7e569b 100644
--- a/actionpack/lib/action_dispatch/middleware/cookies.rb
+++ b/actionpack/lib/action_dispatch/middleware/cookies.rb
@@ -170,12 +170,14 @@ module ActionDispatch
           options = { :value => value }
         end
 
-        @cookies[key.to_s] = value
-
         handle_options(options)
 
-        @set_cookies[key.to_s] = options
-        @delete_cookies.delete(key.to_s)
+        if @cookies[key.to_s] != value or options[:expires]
+          @cookies[key.to_s] = value
+          @set_cookies[key.to_s] = options
+          @delete_cookies.delete(key.to_s)
+        end
+
         value
       end
 
diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index f75b4d4d04..c04fee21dc 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -74,6 +74,13 @@ module ActionDispatch
     class AbstractStore < Rack::Session::Abstract::ID
       include Compatibility
       include StaleSessionCheck
+
+      private
+
+      def set_cookie(env, session_id, cookie)
+        request = ActionDispatch::Request.new(env)
+        request.cookie_jar[key] = cookie
+      end
     end
   end
 end