require 'yaml' require 'active_support/core_ext/hash/keys' require 'active_support/core_ext/object/blank' require 'active_support/key_generator' require 'active_support/message_verifier' require 'rails/engine' module Rails # An Engine 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 them 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.app_class = base add_lib_to_load_path!(find_root(base.called_from)) end def instance super.run_load_hooks! end def create(initial_variable_values = {}, &block) new(initial_variable_values, &block).run_load_hooks! end def find_root(from) find_root_with_flag "config.ru", from, Dir.pwd 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, :reloader, :executor delegate :default_url_options, :default_url_options=, to: :routes INITIAL_VARIABLES = [:config, :railties, :routes_reloader, :reloaders, :routes, :helpers, :app_env_config, :secrets] # :nodoc: def initialize(initial_variable_values = {}, &block) super() @initialized = false @reloaders = [] @routes_reloader = nil @app_env_config = nil @ordered_railties = nil @railties = nil @message_verifiers = {} @ran_load_hooks = false @executor = Class.new(ActiveSupport::Executor) @reloader = Class.new(ActiveSupport::Reloader) @reloader.executor = @executor # are these actually used? @initial_variable_values = initial_variable_values @block = block end # Returns true if the application is initialized. def initialized? @initialized end def run_load_hooks! # :nodoc: return self if @ran_load_hooks @ran_load_hooks = true 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 self end # Reload application routes regardless if they changed or not. def reload_routes! routes_reloader.reload! end # Returns 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 ||= if secrets.secret_key_base unless secrets.secret_key_base.kind_of?(String) raise ArgumentError, "`secret_key_base` for #{Rails.env} environment must be a type of String, change this value in `config/secrets.yml`" end key_generator = ActiveSupport::KeyGenerator.new(secrets.secret_key_base, iterations: 1000) ActiveSupport::CachingKeyGenerator.new(key_generator) else ActiveSupport::LegacyKeyGenerator.new(secrets.secret_token) end end # Returns a message verifier object. # # This verifier can be used to generate and verify signed messages in the application. # # It is recommended not to use the same verifier for different things, so you can get different # verifiers passing the +verifier_name+ argument. # # ==== Parameters # # * +verifier_name+ - the name of the message verifier. # # ==== Examples # # message = Rails.application.message_verifier('sensitive_data').generate('my sensible data') # Rails.application.message_verifier('sensitive_data').verify(message) # # => 'my sensible data' # # See the +ActiveSupport::MessageVerifier+ documentation for more information. def message_verifier(verifier_name) @message_verifiers[verifier_name] ||= begin secret = key_generator.generate_key(verifier_name.to_s) ActiveSupport::MessageVerifier.new(secret) end end # Convenience for loading config/foo.yml for the current Rails env. # # Example: # # # config/exception_notification.yml: # production: # url: http://127.0.0.1:8080 # namespace: my_app_production # development: # url: http://localhost:3001 # namespace: my_app_development # # # config/environments/production.rb # Rails.application.configure do # config.middleware.use ExceptionNotifier, config_for(:exception_notification) # end def config_for(name, env: Rails.env) if name.is_a?(Pathname) yaml = name else yaml = Pathname.new("#{paths["config"].existent.first}/#{name}.yml") end if yaml.exist? require "erb" (YAML.load(ERB.new(yaml.read).result) || {})[env] || {} else raise "Could not load configuration. No such file - #{yaml}" end rescue Psych::SyntaxError => e raise "YAML syntax error occurred while parsing #{yaml}. " \ "Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \ "Error: #{e.message}" 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" => secrets.secret_token, "action_dispatch.secret_key_base" => secrets.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, "action_dispatch.cookies_serializer" => config.action_dispatch.cookies_serializer, "action_dispatch.cookies_digest" => config.action_dispatch.cookies_digest ) 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 any console called in the instance of a new application up # to the +console+ method defined in Rails::Railtie. def console(&blk) self.class.console(&blk) end # Sends any generators called in the instance of a new application up # to the +generators+ method defined in Rails::Railtie. def generators(&blk) self.class.generators(&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 $LOAD_PATH on your own in case # you need to load files in lib/ during the application configuration as well. def self.add_lib_to_load_path!(root) #:nodoc: path = File.join root, 'lib' if File.exist?(path) && !$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(self.class.find_root(self.class.called_from)) end def config=(configuration) #:nodoc: @config = configuration end # Returns secrets added to config/secrets.yml. # # Example: # # development: # secret_key_base: 836fa3665997a860728bcb9e9a1e704d427cfc920e79d847d79c8a9a907b9e965defa4154b2b86bdec6930adbe33f21364523a6f6ce363865724549fdfc08553 # test: # secret_key_base: 5a37811464e7d378488b0f073e2193b093682e4e21f5d6f3ae0a4e1781e61a351fdc878a843424e81c73fb484a40d23f92c8dafac4870e74ede6e5e174423010 # production: # secret_key_base: <%= ENV["SECRET_KEY_BASE"] %> # namespace: my_app_production # # +Rails.application.secrets.namespace+ returns +my_app_production+ in the # production environment. def secrets @secrets ||= begin secrets = ActiveSupport::OrderedOptions.new yaml = config.paths["config/secrets"].first if File.exist?(yaml) require "erb" all_secrets = YAML.load(ERB.new(IO.read(yaml)).result) || {} env_secrets = all_secrets[Rails.env] secrets.merge!(env_secrets.symbolize_keys) if env_secrets end # Fallback to config.secret_key_base if secrets.secret_key_base isn't set secrets.secret_key_base ||= config.secret_key_base # Fallback to config.secret_token if secrets.secret_token isn't set secrets.secret_token ||= config.secret_token secrets end end def secrets=(secrets) #:nodoc: @secrets = secrets end def to_app #:nodoc: self end def helpers_paths #:nodoc: config.helpers_paths end console do require "pp" end console do unless ::Kernel.private_method_defined?(:y) require "psych/y" end end # Return an array of railties respecting the order they're loaded # and the order specified by the +railties_order+ config. # # While running initializers we need engines in reverse order here when # copying migrations from railties ; we need them in the order given by # +railties_order+. def migration_railties # :nodoc: ordered_railties.flatten - [self] 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 end end def railties_initializers(current) #:nodoc: initializers = [] ordered_railties.reverse.flatten.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 validate_secret_key_config! #:nodoc: if secrets.secret_key_base.blank? ActiveSupport::Deprecation.warn "You didn't set `secret_key_base`. " + "Read the upgrade documentation to learn more about this new config option." if secrets.secret_token.blank? raise "Missing `secret_key_base` for '#{Rails.env}' environment, set this value in `config/secrets.yml`" end end end private def build_request(env) req = super env["ORIGINAL_FULLPATH"] = req.fullpath env["ORIGINAL_SCRIPT_NAME"] = req.script_name req end def build_middleware config.app_middleware + super end end end