mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
522 lines
18 KiB
Ruby
522 lines
18 KiB
Ruby
require 'fileutils'
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require 'yaml'
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require 'active_support/core_ext/hash/keys'
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require 'active_support/core_ext/object/blank'
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require 'active_support/key_generator'
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require 'active_support/message_verifier'
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require 'rails/engine'
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module Rails
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# An Engine 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 and engines
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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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# "cache_classes", "consider_all_requests_local", "filter_parameters",
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# "logger" 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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# == Booting process
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#
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# The application is also responsible for setting up and executing the booting
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# process. From the moment you require "config/application.rb" in your app,
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# the booting process goes like this:
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#
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# 1) require "config/boot.rb" to setup load paths
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# 2) require railties and engines
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# 3) Define Rails.application as "class MyApp::Application < Rails::Application"
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# 4) Run config.before_configuration callbacks
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# 5) Load config/environments/ENV.rb
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# 6) Run config.before_initialize callbacks
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# 7) Run Railtie#initializer defined by railties, engines and application.
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# One by one, each engine sets up its load paths, routes and runs its config/initializers/* files.
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# 8) Custom Railtie#initializers added by railties, engines and applications are executed
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# 9) Build the middleware stack and run to_prepare callbacks
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# 10) Run config.before_eager_load and eager_load! if eager_load is true
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# 11) Run config.after_initialize callbacks
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#
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# == Multiple Applications
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#
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# If you decide to define multiple applications, then the first application
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# that is initialized will be set to +Rails.application+, unless you override
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# it with a different application.
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#
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# To create a new application, you can instantiate a new instance of a class
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# that has already been created:
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#
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# class Application < Rails::Application
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# end
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#
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# first_application = Application.new
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# second_application = Application.new(config: first_application.config)
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#
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# In the above example, the configuration from the first application was used
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# to initialize the second application. You can also use the +initialize_copy+
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# on one of the applications to create a copy of the application which shares
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# the configuration.
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#
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# If you decide to define rake tasks, runners, or initializers in an
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# application other than +Rails.application+, then you must run those
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# these manually.
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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 :DefaultMiddlewareStack, 'rails/application/default_middleware_stack'
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autoload :Finisher, 'rails/application/finisher'
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autoload :Railties, 'rails/engine/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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super
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Rails.app_class = base
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add_lib_to_load_path!(find_root(base.called_from))
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end
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def instance
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super.run_load_hooks!
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end
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def create(initial_variable_values = {}, &block)
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new(initial_variable_values, &block).run_load_hooks!
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end
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def find_root(from)
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find_root_with_flag "config.ru", from, Dir.pwd
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end
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# Makes the +new+ method public.
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#
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# Note that Rails::Application inherits from Rails::Engine, which
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# inherits from Rails::Railtie and the +new+ method on Rails::Railtie is
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# private
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public :new
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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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attr_reader :reloaders
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delegate :default_url_options, :default_url_options=, to: :routes
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INITIAL_VARIABLES = [:config, :railties, :routes_reloader, :reloaders,
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:routes, :helpers, :app_env_config, :secrets] # :nodoc:
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def initialize(initial_variable_values = {}, &block)
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super()
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@initialized = false
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@reloaders = []
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@routes_reloader = nil
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@app_env_config = nil
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@ordered_railties = nil
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@railties = nil
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@message_verifiers = {}
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@ran_load_hooks = false
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# are these actually used?
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@initial_variable_values = initial_variable_values
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@block = block
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end
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# Returns true if the application is initialized.
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def initialized?
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@initialized
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end
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def run_load_hooks! # :nodoc:
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return self if @ran_load_hooks
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@ran_load_hooks = true
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ActiveSupport.run_load_hooks(:before_configuration, self)
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@initial_variable_values.each do |variable_name, value|
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if INITIAL_VARIABLES.include?(variable_name)
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instance_variable_set("@#{variable_name}", value)
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end
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end
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instance_eval(&@block) if @block
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self
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end
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# Reload application routes regardless if they changed or not.
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def reload_routes!
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routes_reloader.reload!
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end
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# Returns the application's KeyGenerator
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def key_generator
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# number of iterations selected based on consultation with the google security
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# team. Details at https://github.com/rails/rails/pull/6952#issuecomment-7661220
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@caching_key_generator ||=
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if secrets.secret_key_base
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key_generator = ActiveSupport::KeyGenerator.new(secrets.secret_key_base, iterations: 1000)
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ActiveSupport::CachingKeyGenerator.new(key_generator)
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else
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ActiveSupport::LegacyKeyGenerator.new(secrets.secret_token)
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end
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end
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# Returns a message verifier object.
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#
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# This verifier can be used to generate and verify signed messages in the application.
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#
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# It is recommended not to use the same verifier for different things, so you can get different
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# verifiers passing the +verifier_name+ argument.
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#
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# ==== Parameters
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#
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# * +verifier_name+ - the name of the message verifier.
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#
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# ==== Examples
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#
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# message = Rails.application.message_verifier('sensitive_data').generate('my sensible data')
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# Rails.application.message_verifier('sensitive_data').verify(message)
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# # => 'my sensible data'
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#
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# See the +ActiveSupport::MessageVerifier+ documentation for more information.
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def message_verifier(verifier_name)
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@message_verifiers[verifier_name] ||= begin
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secret = key_generator.generate_key(verifier_name.to_s)
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ActiveSupport::MessageVerifier.new(secret)
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end
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end
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# Convenience for loading config/foo.yml for the current Rails env.
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#
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# Example:
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#
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# # config/exception_notification.yml:
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# production:
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# url: http://127.0.0.1:8080
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# namespace: my_app_production
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# development:
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# url: http://localhost:3001
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# namespace: my_app_development
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#
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# # config/production.rb
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# Rails.application.configure do
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# config.middleware.use ExceptionNotifier, config_for(:exception_notification)
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# end
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def config_for(name)
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yaml = Pathname.new("#{paths["config"].existent.first}/#{name}.yml")
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if yaml.exist?
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require "erb"
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(YAML.load(ERB.new(yaml.read).result) || {})[Rails.env] || {}
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else
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raise "Could not load configuration. No such file - #{yaml}"
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end
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rescue Psych::SyntaxError => e
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raise "YAML syntax error occurred while parsing #{yaml}. " \
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"Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \
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"Error: #{e.message}"
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end
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# Stores some of the Rails initial environment parameters which
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# will be used by middlewares and engines to configure themselves.
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def env_config
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@app_env_config ||= begin
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validate_secret_key_config!
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super.merge({
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"action_dispatch.parameter_filter" => config.filter_parameters,
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"action_dispatch.redirect_filter" => config.filter_redirect,
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"action_dispatch.secret_token" => secrets.secret_token,
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"action_dispatch.secret_key_base" => secrets.secret_key_base,
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"action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions,
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"action_dispatch.show_detailed_exceptions" => config.consider_all_requests_local,
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"action_dispatch.logger" => Rails.logger,
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"action_dispatch.backtrace_cleaner" => Rails.backtrace_cleaner,
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"action_dispatch.key_generator" => key_generator,
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"action_dispatch.http_auth_salt" => config.action_dispatch.http_auth_salt,
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"action_dispatch.signed_cookie_salt" => config.action_dispatch.signed_cookie_salt,
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"action_dispatch.encrypted_cookie_salt" => config.action_dispatch.encrypted_cookie_salt,
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"action_dispatch.encrypted_signed_cookie_salt" => config.action_dispatch.encrypted_signed_cookie_salt,
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"action_dispatch.cookies_serializer" => config.action_dispatch.cookies_serializer,
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"action_dispatch.cookies_digest" => config.action_dispatch.cookies_digest
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})
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end
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end
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# If you try to define a set of rake tasks on the instance, these will get
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# passed up to the rake tasks defined on the application's class.
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def rake_tasks(&block)
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self.class.rake_tasks(&block)
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end
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# Sends the initializers to the +initializer+ method defined in the
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# Rails::Initializable module. Each Rails::Application class has its own
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# set of initializers, as defined by the Initializable module.
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def initializer(name, opts={}, &block)
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self.class.initializer(name, opts, &block)
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end
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# Sends any runner called in the instance of a new application up
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# to the +runner+ method defined in Rails::Railtie.
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def runner(&blk)
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self.class.runner(&blk)
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end
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# Sends any console called in the instance of a new application up
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# to the +console+ method defined in Rails::Railtie.
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def console(&blk)
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self.class.console(&blk)
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end
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# Sends any generators called in the instance of a new application up
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# to the +generators+ method defined in Rails::Railtie.
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def generators(&blk)
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self.class.generators(&blk)
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end
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# Sends the +isolate_namespace+ method up to the class method.
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def isolate_namespace(mod)
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self.class.isolate_namespace(mod)
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end
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## Rails internal API
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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 $LOAD_PATH on your own in case
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# you need to load files in lib/ during the application configuration as well.
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def self.add_lib_to_load_path!(root) #:nodoc:
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path = File.join root, 'lib'
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if File.exist?(path) && !$LOAD_PATH.include?(path)
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$LOAD_PATH.unshift(path)
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end
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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 routes_reloader #:nodoc:
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@routes_reloader ||= RoutesReloader.new
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end
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# Returns an array of file paths appended with a hash of
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# directories-extensions suitable for ActiveSupport::FileUpdateChecker
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# API.
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def watchable_args #:nodoc:
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files, dirs = config.watchable_files.dup, config.watchable_dirs.dup
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ActiveSupport::Dependencies.autoload_paths.each do |path|
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dirs[path.to_s] = [:rb]
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end
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[files, dirs]
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end
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# Initialize the application passing the given group. By default, the
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# group is :default
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def initialize!(group=:default) #:nodoc:
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raise "Application has been already initialized." if @initialized
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run_initializers(group, self)
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@initialized = true
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self
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end
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def initializers #:nodoc:
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Bootstrap.initializers_for(self) +
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railties_initializers(super) +
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Finisher.initializers_for(self)
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end
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def config #:nodoc:
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@config ||= Application::Configuration.new(self.class.find_root(self.class.called_from))
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end
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def config=(configuration) #:nodoc:
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@config = configuration
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end
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# Returns secrets added to config/secrets.yml.
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#
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# Example:
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#
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# development:
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# secret_key_base: 836fa3665997a860728bcb9e9a1e704d427cfc920e79d847d79c8a9a907b9e965defa4154b2b86bdec6930adbe33f21364523a6f6ce363865724549fdfc08553
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# test:
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# secret_key_base: 5a37811464e7d378488b0f073e2193b093682e4e21f5d6f3ae0a4e1781e61a351fdc878a843424e81c73fb484a40d23f92c8dafac4870e74ede6e5e174423010
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# production:
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# secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
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# namespace: my_app_production
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#
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# +Rails.application.secrets.namespace+ returns +my_app_production+ in the
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# production environment.
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def secrets
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@secrets ||= begin
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secrets = ActiveSupport::OrderedOptions.new
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yaml = config.paths["config/secrets"].first
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if File.exist?(yaml)
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require "erb"
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all_secrets = YAML.load(ERB.new(IO.read(yaml)).result) || {}
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env_secrets = all_secrets[Rails.env]
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secrets.merge!(env_secrets.symbolize_keys) if env_secrets
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end
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# Fallback to config.secret_key_base if secrets.secret_key_base isn't set
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secrets.secret_key_base ||= config.secret_key_base
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# Fallback to config.secret_token if secrets.secret_token isn't set
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secrets.secret_token ||= config.secret_token
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secrets
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end
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end
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def secrets=(secrets) #:nodoc:
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@secrets = secrets
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end
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def to_app #:nodoc:
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self
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end
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def helpers_paths #:nodoc:
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config.helpers_paths
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end
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console do
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require "pp"
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end
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console do
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unless ::Kernel.private_method_defined?(:y)
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require "psych/y"
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end
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end
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# Return an array of railties respecting the order they're loaded
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# and the order specified by the +railties_order+ config.
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#
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# While running initializers we need engines in reverse order here when
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# copying migrations from railties ; we need them in the order given by
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# +railties_order+.
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def migration_railties # :nodoc:
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ordered_railties.flatten - [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 run_tasks_blocks(app) #:nodoc:
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railties.each { |r| r.run_tasks_blocks(app) }
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super
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require "rails/tasks"
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task :environment do
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ActiveSupport.on_load(:before_initialize) { config.eager_load = false }
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require_environment!
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end
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end
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def run_generators_blocks(app) #:nodoc:
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railties.each { |r| r.run_generators_blocks(app) }
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super
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end
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def run_runner_blocks(app) #:nodoc:
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railties.each { |r| r.run_runner_blocks(app) }
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super
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end
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def run_console_blocks(app) #:nodoc:
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railties.each { |r| r.run_console_blocks(app) }
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super
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end
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# Returns the ordered railties for this application considering railties_order.
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def ordered_railties #:nodoc:
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@ordered_railties ||= begin
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order = config.railties_order.map do |railtie|
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if railtie == :main_app
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self
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elsif railtie.respond_to?(:instance)
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railtie.instance
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else
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railtie
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end
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end
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all = (railties - order)
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all.push(self) unless (all + order).include?(self)
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order.push(:all) unless order.include?(:all)
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index = order.index(:all)
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order[index] = all
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order
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end
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end
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def railties_initializers(current) #:nodoc:
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initializers = []
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ordered_railties.reverse.flatten.each do |r|
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if r == self
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initializers += current
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else
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initializers += r.initializers
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end
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end
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initializers
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end
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def default_middleware_stack #:nodoc:
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default_stack = DefaultMiddlewareStack.new(self, config, paths)
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default_stack.build_stack
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end
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def validate_secret_key_config! #:nodoc:
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if secrets.secret_key_base.blank?
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ActiveSupport::Deprecation.warn "You didn't set `secret_key_base`. " +
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"Read the upgrade documentation to learn more about this new config option."
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if secrets.secret_token.blank?
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raise "Missing `secret_key_base` for '#{Rails.env}' environment, set this value in `config/secrets.yml`"
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end
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end
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end
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private
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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
|