config.ru

require 'my_bouncer'
require 'my_app'

use MyBouncer
run MyApp

my_bouncer.rb

require 'heroku/bouncer'

class MyBouncer < Heroku::Bouncer
 
  def call(env)
    # dont protect routes that have bananas
    if env['PATH_INFO'] =~ /bananas/
      @app.call(env)
    # normal behavior otherwise
    else
      super
    end
  end
 
end