require 'fileutils' require 'uri' require 'set' module ActionController # \Caching is a cheap way of speeding up slow applications by keeping the result of # calculations, renderings, and database calls around for subsequent requests. # # You can read more about each approach by clicking the modules below. # # Note: To turn off all caching, set # config.action_controller.perform_caching = false. # # == \Caching stores # # All the caching stores from ActiveSupport::Cache are available to be used as backends # for Action Controller caching. # # Configuration examples (MemoryStore is the default): # # config.action_controller.cache_store = :memory_store # config.action_controller.cache_store = :file_store, '/path/to/cache/directory' # config.action_controller.cache_store = :mem_cache_store, 'localhost' # config.action_controller.cache_store = :mem_cache_store, Memcached::Rails.new('localhost:11211') # config.action_controller.cache_store = MyOwnStore.new('parameter') module Caching extend ActiveSupport::Concern extend ActiveSupport::Autoload eager_autoload do autoload :Fragments end module ConfigMethods def cache_store config.cache_store end def cache_store=(store) config.cache_store = ActiveSupport::Cache.lookup_store(store) end private def cache_configured? perform_caching && cache_store end end include RackDelegation include AbstractController::Callbacks include ConfigMethods include Fragments included do extend ConfigMethods config_accessor :default_static_extension self.default_static_extension ||= '.html' def self.page_cache_extension=(extension) ActiveSupport::Deprecation.deprecation_warning(:page_cache_extension, :default_static_extension) self.default_static_extension = extension end def self.page_cache_extension ActiveSupport::Deprecation.deprecation_warning(:page_cache_extension, :default_static_extension) default_static_extension end config_accessor :perform_caching self.perform_caching = true if perform_caching.nil? class_attribute :_view_cache_dependencies self._view_cache_dependencies = [] helper_method :view_cache_dependencies if respond_to?(:helper_method) end module ClassMethods def view_cache_dependency(&dependency) self._view_cache_dependencies += [dependency] end end def caching_allowed? request.get? && response.status == 200 end def view_cache_dependencies self.class._view_cache_dependencies.map { |dep| instance_exec(&dep) }.compact end protected # Convenience accessor. def cache(key, options = {}, &block) if cache_configured? cache_store.fetch(ActiveSupport::Cache.expand_cache_key(key, :controller), options, &block) else yield end end end end