require 'fileutils' require 'active_support/core_ext/object/blank' require 'active_support/key_generator' require 'rails/engine' module Rails # In Rails 3.0, a Rails::Application object was introduced which is nothing more than # an Engine but with the responsibility of coordinating the whole boot process. # # == Initialization # # Rails::Application is responsible for executing all railties and engines # initializers. It also executes some bootstrap initializers (check # Rails::Application::Bootstrap) and finishing initializers, after all the others # are executed (check Rails::Application::Finisher). # # == Configuration # # Besides providing the same configuration as Rails::Engine and Rails::Railtie, # the application object has several specific configurations, for example # "cache_classes", "consider_all_requests_local", "filter_parameters", # "logger" and so forth. # # Check Rails::Application::Configuration to see them all. # # == Routes # # The application object is also responsible for holding the routes and reloading routes # whenever the files change in development. # # == Middlewares # # The Application is also responsible for building the middleware stack. # # == Booting process # # The application is also responsible for setting up and executing the booting # process. From the moment you require "config/application.rb" in your app, # the booting process goes like this: # # 1) require "config/boot.rb" to setup load paths # 2) require railties and engines # 3) Define Rails.application as "class MyApp::Application < Rails::Application" # 4) Run config.before_configuration callbacks # 5) Load config/environments/ENV.rb # 6) Run config.before_initialize callbacks # 7) Run Railtie#initializer defined by railties, engines and application. # One by one, each engine sets up its load paths, routes and runs its config/initializers/* files. # 8) Custom Railtie#initializers added by railties, engines and applications are executed # 9) Build the middleware stack and run to_prepare callbacks # 10) Run config.before_eager_load and eager_load! if eager_load is true # 11) Run config.after_initialize callbacks # # == Multiple Applications # # If you decide to define multiple applications, then the first application # that is initialized will be set to +Rails.application+, unless you override # it with a different application. # # To create a new application, you can instantiate a new instance of a class # that has already been created: # # class Application < Rails::Application # end # # first_application = Application.new # second_application = Application.new(config: first_application.config) # # In the above example, the configuration from the first application was used # to initialize the second application. You can also use the +initialize_copy+ # on one of the applications to create a copy of the application which shares # the configuration. # # If you decide to define rake tasks, runners, or initializers in an # application other than +Rails.application+, then you must run those # these manually. class Application < Engine autoload :Bootstrap, 'rails/application/bootstrap' autoload :Configuration, 'rails/application/configuration' autoload :DefaultMiddlewareStack, 'rails/application/default_middleware_stack' autoload :Finisher, 'rails/application/finisher' autoload :Railties, 'rails/engine/railties' autoload :RoutesReloader, 'rails/application/routes_reloader' class << self def inherited(base) super Rails.application ||= base.instance end # Makes the +new+ method public. # # Note that Rails::Application inherits from Rails::Engine, which # inherits from Rails::Railtie and the +new+ method on Rails::Railtie is # private public :new end attr_accessor :assets, :sandbox alias_method :sandbox?, :sandbox attr_reader :reloaders delegate :default_url_options, :default_url_options=, to: :routes INITIAL_VARIABLES = [:config, :railties, :routes_reloader, :reloaders, :routes, :helpers, :app_env_config] # :nodoc: def initialize(initial_variable_values = {}, &block) super() @initialized = false @reloaders = [] @routes_reloader = nil @app_env_config = nil @ordered_railties = nil @railties = nil add_lib_to_load_path! ActiveSupport.run_load_hooks(:before_configuration, self) initial_variable_values.each do |variable_name, value| if INITIAL_VARIABLES.include?(variable_name) instance_variable_set("@#{variable_name}", value) end end instance_eval(&block) if block_given? end # Returns true if the application is initialized. def initialized? @initialized end # Implements call according to the Rack API. It simply # dispatches the request to the underlying middleware stack. def call(env) env["ORIGINAL_FULLPATH"] = build_original_fullpath(env) env["ORIGINAL_SCRIPT_NAME"] = env["SCRIPT_NAME"] super(env) end # Reload application routes regardless if they changed or not. def reload_routes! routes_reloader.reload! end # Return the application's KeyGenerator def key_generator # number of iterations selected based on consultation with the google security # team. Details at https://github.com/rails/rails/pull/6952#issuecomment-7661220 @caching_key_generator ||= begin if config.secret_key_base key_generator = ActiveSupport::KeyGenerator.new(config.secret_key_base, iterations: 1000) ActiveSupport::CachingKeyGenerator.new(key_generator) else ActiveSupport::LegacyKeyGenerator.new(config.secret_token) end end end # Stores some of the Rails initial environment parameters which # will be used by middlewares and engines to configure themselves. def env_config @app_env_config ||= begin validate_secret_key_config! super.merge({ "action_dispatch.parameter_filter" => config.filter_parameters, "action_dispatch.redirect_filter" => config.filter_redirect, "action_dispatch.secret_token" => config.secret_token, "action_dispatch.secret_key_base" => config.secret_key_base, "action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions, "action_dispatch.show_detailed_exceptions" => config.consider_all_requests_local, "action_dispatch.logger" => Rails.logger, "action_dispatch.backtrace_cleaner" => Rails.backtrace_cleaner, "action_dispatch.key_generator" => key_generator, "action_dispatch.http_auth_salt" => config.action_dispatch.http_auth_salt, "action_dispatch.signed_cookie_salt" => config.action_dispatch.signed_cookie_salt, "action_dispatch.encrypted_cookie_salt" => config.action_dispatch.encrypted_cookie_salt, "action_dispatch.encrypted_signed_cookie_salt" => config.action_dispatch.encrypted_signed_cookie_salt }) end end # If you try to define a set of rake tasks on the instance, these will get # passed up to the rake tasks defined on the application's class. def rake_tasks(&block) self.class.rake_tasks(&block) end # Sends the initializers to the +initializer+ method defined in the # Rails::Initializable module. Each Rails::Application class has its own # set of initializers, as defined by the Initializable module. def initializer(name, opts={}, &block) self.class.initializer(name, opts, &block) end # Sends any runner called in the instance of a new application up # to the +runner+ method defined in Rails::Railtie. def runner(&blk) self.class.runner(&blk) end # Sends the +isolate_namespace+ method up to the class method. def isolate_namespace(mod) self.class.isolate_namespace(mod) end ## Rails internal API # This method is called just after an application inherits from Rails::Application, # allowing the developer to load classes in lib and use them during application # configuration. # # class MyApplication < Rails::Application # require "my_backend" # in lib/my_backend # config.i18n.backend = MyBackend # end # # Notice this method takes into consideration the default root path. So if you # are changing config.root inside your application definition or having a custom # Rails application, you will need to add lib to $LOAD_PATH on your own in case # you need to load files in lib/ during the application configuration as well. def add_lib_to_load_path! #:nodoc: path = File.join config.root, 'lib' if File.exists?(path) && !$LOAD_PATH.include?(path) $LOAD_PATH.unshift(path) end end def require_environment! #:nodoc: environment = paths["config/environment"].existent.first require environment if environment end def routes_reloader #:nodoc: @routes_reloader ||= RoutesReloader.new end # Returns an array of file paths appended with a hash of # directories-extensions suitable for ActiveSupport::FileUpdateChecker # API. def watchable_args #:nodoc: files, dirs = config.watchable_files.dup, config.watchable_dirs.dup ActiveSupport::Dependencies.autoload_paths.each do |path| dirs[path.to_s] = [:rb] end [files, dirs] end # Initialize the application passing the given group. By default, the # group is :default def initialize!(group=:default) #:nodoc: raise "Application has been already initialized." if @initialized run_initializers(group, self) @initialized = true self end def initializers #:nodoc: Bootstrap.initializers_for(self) + railties_initializers(super) + Finisher.initializers_for(self) end def config #:nodoc: @config ||= Application::Configuration.new(find_root_with_flag("config.ru", Dir.pwd)) end def config=(configuration) #:nodoc: @config = configuration end def to_app #:nodoc: self end def helpers_paths #:nodoc: config.helpers_paths end protected alias :build_middleware_stack :app def run_tasks_blocks(app) #:nodoc: railties.each { |r| r.run_tasks_blocks(app) } super require "rails/tasks" task :environment do ActiveSupport.on_load(:before_initialize) { config.eager_load = false } require_environment! end end def run_generators_blocks(app) #:nodoc: railties.each { |r| r.run_generators_blocks(app) } super end def run_runner_blocks(app) #:nodoc: railties.each { |r| r.run_runner_blocks(app) } super end def run_console_blocks(app) #:nodoc: railties.each { |r| r.run_console_blocks(app) } super end # Returns the ordered railties for this application considering railties_order. def ordered_railties #:nodoc: @ordered_railties ||= begin order = config.railties_order.map do |railtie| if railtie == :main_app self elsif railtie.respond_to?(:instance) railtie.instance else railtie end end all = (railties - order) all.push(self) unless (all + order).include?(self) order.push(:all) unless order.include?(:all) index = order.index(:all) order[index] = all order.reverse.flatten end end def railties_initializers(current) #:nodoc: initializers = [] ordered_railties.each do |r| if r == self initializers += current else initializers += r.initializers end end initializers end def default_middleware_stack #:nodoc: default_stack = DefaultMiddlewareStack.new(self, config, paths) default_stack.build_stack end def build_original_fullpath(env) #:nodoc: path_info = env["PATH_INFO"] query_string = env["QUERY_STRING"] script_name = env["SCRIPT_NAME"] if query_string.present? "#{script_name}#{path_info}?#{query_string}" else "#{script_name}#{path_info}" end end def validate_secret_key_config! #:nodoc: if config.secret_key_base.blank? && config.secret_token.blank? raise "You must set config.secret_key_base in your app's config." end end end end