module Sinatra
module Sinatra::Delegator
module Sinatra::Helpers
module Sinatra::Templates
module Sinatra::Templates::ContentTyped
class Sinatra::Application
class Sinatra::Base
class Sinatra::Helpers::StaticFile
class Sinatra::NotFound
class Sinatra::Request
class Sinatra::Response
class Sinatra::ShowExceptions
sinatra
1.1.3
# back
def back ; request.referer ; end