mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
210 lines
6.9 KiB
Ruby
210 lines
6.9 KiB
Ruby
require 'active_support/core_ext/hash/reverse_merge'
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require 'active_support/file_update_checker'
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require 'fileutils'
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require 'rails/plugin'
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require 'rails/engine'
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module Rails
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# In Rails 3.0, a Rails::Application object was introduced which is nothing more than
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# an Engine but with the responsibility of coordinating the whole boot process.
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#
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# == Initialization
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#
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# Rails::Application is responsible for executing all railties, engines and plugin
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# initializers. It also executes some bootstrap initializers (check
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# Rails::Application::Bootstrap) and finishing initializers, after all the others
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# are executed (check Rails::Application::Finisher).
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#
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# == Configuration
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#
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# Besides providing the same configuration as Rails::Engine and Rails::Railtie,
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# the application object has several specific configurations, for example
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# "allow_concurrency", "cache_classes", "consider_all_requests_local", "filter_parameters",
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# "logger", "reload_plugins" and so forth.
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#
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# Check Rails::Application::Configuration to see them all.
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#
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# == Routes
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#
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# The application object is also responsible for holding the routes and reloading routes
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# whenever the files change in development.
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#
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# == Middlewares
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#
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# The Application is also responsible for building the middleware stack.
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#
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class Application < Engine
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autoload :Bootstrap, 'rails/application/bootstrap'
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autoload :Configuration, 'rails/application/configuration'
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autoload :Finisher, 'rails/application/finisher'
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autoload :Railties, 'rails/application/railties'
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autoload :RoutesReloader, 'rails/application/routes_reloader'
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class << self
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def inherited(base)
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raise "You cannot have more than one Rails::Application" if Rails.application
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super
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Rails.application = base.instance
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Rails.application.add_lib_to_load_path!
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ActiveSupport.run_load_hooks(:before_configuration, base.instance)
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end
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end
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attr_accessor :assets, :sandbox
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alias_method :sandbox?, :sandbox
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delegate :default_url_options, :default_url_options=, :to => :routes
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def initialize
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super
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@initialized = false
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end
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# This method is called just after an application inherits from Rails::Application,
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# allowing the developer to load classes in lib and use them during application
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# configuration.
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#
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# class MyApplication < Rails::Application
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# require "my_backend" # in lib/my_backend
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# config.i18n.backend = MyBackend
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# end
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#
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# Notice this method takes into consideration the default root path. So if you
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# are changing config.root inside your application definition or having a custom
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# Rails application, you will need to add lib to $LOAD_PATH on your own in case
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# you need to load files in lib/ during the application configuration as well.
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def add_lib_to_load_path! #:nodoc:
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path = config.root.join('lib').to_s
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$LOAD_PATH.unshift(path) if File.exists?(path)
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end
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def require_environment! #:nodoc:
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environment = paths["config/environment"].existent.first
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require environment if environment
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end
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def reload_routes!
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routes_reloader.reload!
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end
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def routes_reloader
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@routes_reloader ||= RoutesReloader.new
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end
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def initialize!
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raise "Application has been already initialized." if @initialized
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run_initializers(self)
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@initialized = true
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self
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end
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def load_tasks(app=self)
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initialize_tasks
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super
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self
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end
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def load_console(app=self)
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initialize_console
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super
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self
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end
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# Rails.application.env_config stores some of the Rails initial environment parameters.
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# Currently stores:
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#
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# * action_dispatch.parameter_filter" => config.filter_parameters,
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# * action_dispatch.secret_token" => config.secret_token,
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# * action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions
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#
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# These parameters will be used by middlewares and engines to configure themselves.
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#
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def env_config
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@env_config ||= super.merge({
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"action_dispatch.parameter_filter" => config.filter_parameters,
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"action_dispatch.secret_token" => config.secret_token,
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"action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions
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})
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end
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def initializers
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Bootstrap.initializers_for(self) +
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super +
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Finisher.initializers_for(self)
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end
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def config
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@config ||= Application::Configuration.new(find_root_with_flag("config.ru", Dir.pwd))
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end
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def to_app
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self
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end
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protected
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alias :build_middleware_stack :app
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def default_middleware_stack
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ActionDispatch::MiddlewareStack.new.tap do |middleware|
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if rack_cache = config.action_controller.perform_caching && config.action_dispatch.rack_cache
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require "action_dispatch/http/rack_cache"
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middleware.use ::Rack::Cache, rack_cache
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end
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if config.force_ssl
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require "rack/ssl"
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middleware.use ::Rack::SSL
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end
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if config.serve_static_assets
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middleware.use ::ActionDispatch::Static, paths["public"].first, config.static_cache_control
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end
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middleware.use ::Rack::Lock unless config.allow_concurrency
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middleware.use ::Rack::Runtime
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middleware.use ::Rack::MethodOverride
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middleware.use ::Rails::Rack::Logger # must come after Rack::MethodOverride to properly log overridden methods
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middleware.use ::ActionDispatch::ShowExceptions, config.consider_all_requests_local
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middleware.use ::ActionDispatch::RemoteIp, config.action_dispatch.ip_spoofing_check, config.action_dispatch.trusted_proxies
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if config.action_dispatch.x_sendfile_header.present?
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middleware.use ::Rack::Sendfile, config.action_dispatch.x_sendfile_header
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end
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middleware.use ::ActionDispatch::Reloader unless config.cache_classes
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middleware.use ::ActionDispatch::Callbacks
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middleware.use ::ActionDispatch::Cookies
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if config.session_store
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middleware.use config.session_store, config.session_options
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middleware.use ::ActionDispatch::Flash
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end
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middleware.use ::ActionDispatch::ParamsParser
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middleware.use ::ActionDispatch::Head
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middleware.use ::Rack::ConditionalGet
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middleware.use ::Rack::ETag, "no-cache"
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if config.action_dispatch.best_standards_support
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middleware.use ::ActionDispatch::BestStandardsSupport, config.action_dispatch.best_standards_support
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end
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end
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end
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def initialize_tasks
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self.class.rake_tasks do
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require "rails/tasks"
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task :environment do
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$rails_rake_task = true
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require_environment!
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end
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end
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end
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def initialize_console
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require "pp"
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require "rails/console/app"
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require "rails/console/helpers"
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end
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end
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end
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