Rakefile

desc "Prints out your Rack middleware stack"
task :middleware do
  require 'rack'
   options = { config: "config.ru", environment: ENV["RACK_ENV"] || "development" }
  app = Rack::Server.new(options).send(:wrapped_app)
  app.tap do |mw|
    while mw
      if mw.class == Class #&& mw.superclass == Sinatra::Base                                                 
         puts "--- (#{mw} within) ---"
        mw = mw.new
      end
      puts mw.class
      # mw = mw.is_a?(Sinatra::ExtendedRack) ? mw.app : mw.instance_variable_get("@app")                      
      mw = mw.instance_variable_get("@app")
    end
  end
end