require "action_dispatch/http/mime_type" module AbstractController module Collector def self.generate_method_for_mime(mime) sym = mime.is_a?(Symbol) ? mime : mime.to_sym class_eval <<-RUBY, __FILE__, __LINE__ + 1 def #{sym}(*args, &block) custom(Mime[:#{sym}], *args, &block) end RUBY end Mime::SET.each do |mime| generate_method_for_mime(mime) end Mime::Type.register_callback do |mime| generate_method_for_mime(mime) unless self.instance_methods.include?(mime.to_sym) end protected def method_missing(symbol, &block) unless mime_constant = Mime[symbol] raise NoMethodError, "To respond to a custom format, register it as a MIME type first: " \ "http://guides.rubyonrails.org/action_controller_overview.html#restful-downloads. " \ "If you meant to respond to a variant like :tablet or :phone, not a custom format, " \ "be sure to nest your variant response within a format response: " \ "format.html { |html| html.tablet { ... } }" end if Mime::SET.include?(mime_constant) AbstractController::Collector.generate_method_for_mime(mime_constant) send(symbol, &block) else super end end end end