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require 'active_support/core_ext/hash/reverse_merge'
require 'active_support/file_update_checker'
require 'fileutils'
require 'rails/plugin'
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, engines and plugin
# 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
# "allow_concurrency", "cache_classes", "consider_all_requests_local", "filter_parameters",
# "logger", "reload_plugins" 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.
#
class Application < Engine
autoload :Bootstrap, 'rails/application/bootstrap'
autoload :Configuration, 'rails/application/configuration'
autoload :Finisher, 'rails/application/finisher'
autoload :Railties, 'rails/application/railties'
autoload :RoutesReloader, 'rails/application/routes_reloader'
class << self
def inherited(base)
raise "You cannot have more than one Rails::Application" if Rails.application
super
Rails.application = base.instance
Rails.application.add_lib_to_load_path!
ActiveSupport.run_load_hooks(:before_configuration, base.instance)
end
end
attr_accessor :assets, :sandbox
alias_method :sandbox?, :sandbox
delegate :default_url_options, :default_url_options=, :to => :routes
def initialize
super
@initialized = false
end
# 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 = config.root.join('lib').to_s
$LOAD_PATH.unshift(path) if File.exists?(path)
end
def require_environment! #:nodoc:
environment = paths["config/environment"].existent.first
require environment if environment
end
def reload_routes!
routes_reloader.reload!
end
def routes_reloader
@routes_reloader ||= RoutesReloader.new
end
def initialize!
raise "Application has been already initialized." if @initialized
run_initializers(self)
@initialized = true
self
end
def load_tasks(app=self)
initialize_tasks
super
self
end
def load_console(app=self)
initialize_console
super
self
end
# Rails.application.env_config stores some of the Rails initial environment parameters.
# Currently stores:
#
# * action_dispatch.parameter_filter" => config.filter_parameters,
# * action_dispatch.secret_token" => config.secret_token,
# * action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions
#
# These parameters will be used by middlewares and engines to configure themselves.
#
def env_config
@env_config ||= super.merge({
"action_dispatch.parameter_filter" => config.filter_parameters,
"action_dispatch.secret_token" => config.secret_token,
"action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions
})
end
def initializers
Bootstrap.initializers_for(self) +
super +
Finisher.initializers_for(self)
end
def config
@config ||= Application::Configuration.new(find_root_with_flag("config.ru", Dir.pwd))
end
def to_app
self
end
protected
alias :build_middleware_stack :app
def default_middleware_stack
ActionDispatch::MiddlewareStack.new.tap do |middleware|
if rack_cache = config.action_controller.perform_caching && config.action_dispatch.rack_cache
require "action_dispatch/http/rack_cache"
middleware.use ::Rack::Cache, rack_cache
end
if config.force_ssl
require "rack/ssl"
middleware.use ::Rack::SSL
end
if config.serve_static_assets
middleware.use ::ActionDispatch::Static, paths["public"].first, config.static_cache_control
end
middleware.use ::Rack::Lock unless config.allow_concurrency
middleware.use ::Rack::Runtime
middleware.use ::Rack::MethodOverride
middleware.use ::Rails::Rack::Logger # must come after Rack::MethodOverride to properly log overridden methods
middleware.use ::ActionDispatch::ShowExceptions, config.consider_all_requests_local
middleware.use ::ActionDispatch::RemoteIp, config.action_dispatch.ip_spoofing_check, config.action_dispatch.trusted_proxies
if config.action_dispatch.x_sendfile_header.present?
middleware.use ::Rack::Sendfile, config.action_dispatch.x_sendfile_header
end
middleware.use ::ActionDispatch::Reloader unless config.cache_classes
middleware.use ::ActionDispatch::Callbacks
middleware.use ::ActionDispatch::Cookies
if config.session_store
middleware.use config.session_store, config.session_options
middleware.use ::ActionDispatch::Flash
end
middleware.use ::ActionDispatch::ParamsParser
middleware.use ::ActionDispatch::Head
middleware.use ::Rack::ConditionalGet
middleware.use ::Rack::ETag, "no-cache"
if config.action_dispatch.best_standards_support
middleware.use ::ActionDispatch::BestStandardsSupport, config.action_dispatch.best_standards_support
end
end
end
def initialize_tasks
self.class.rake_tasks do
require "rails/tasks"
task :environment do
$rails_rake_task = true
require_environment!
end
end
end
def initialize_console
require "pp"
require "rails/console/app"
require "rails/console/helpers"
end
end
end
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