class ActionController::MiddlewareStack::Middleware

:nodoc:
:nodoc:

end
use AuthenticationMiddleware, except: [:index, :show]
class PostsController < ApplicationController

the following syntax in controllers:
Extend ActionDispatch middleware stack to make it aware of options allowing

# Action Controller MiddlewareStack

def initialize(klass, args, actions, strategy, block)
  @actions = actions
  @strategy = strategy
  super(klass, args, block)
end

def valid?(action)
  @strategy.call @actions, action
end