gistfile1.txt

Using it like following, it doesn't work.

    config.middleware.use RackAfterReply do |env| 
      env['rack_after_reply.callbacks'] << lambda { }
    end

And running the rake:

    rake middleware -t
    /Users/millisami/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `block in require': iconv will be deprecated in the future, use String#encode instead.
    ** Invoke middleware (first_time)
    ** Invoke environment (first_time)
    ** Execute environment
    rake aborted!
    undefined method `new' for RackAfterReply:Module
    /Users/millisami/.rvm/gems/ruby-1.9.3-p0/gems/actionpack-3.1.3/lib/action_dispatch/middleware/stack.rb:43:in `build'
    /Users/millisami/.rvm/gems/ruby-1.9.3-p0/gems/actionpack-3.1.3/lib/action_dispatch/middleware/stack.rb:112:in `block in build'
    ....