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application.rb
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# frozen_string_literal: true
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_verifiers"
require "active_support/deprecation"
require "active_support/encrypted_configuration"
require "active_support/hash_with_indifferent_access"
require "active_support/configuration_file"
require "rails/engine"
require "rails/secrets"
require "rails/autoloaders"
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
# +enable_reloading+, +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 <tt>config/application.rb</tt> in your app,
# the booting process goes like this:
#
# 1. <tt>require "config/boot.rb"</tt> to set up load paths.
# 2. +require+ railties and engines.
# 3. Define +Rails.application+ as <tt>class MyApp::Application < Rails::Application</tt>.
# 4. Run +config.before_configuration+ callbacks.
# 5. Load <tt>config/environments/ENV.rb</tt>.
# 6. Run +config.before_initialize+ callbacks.
# 7. Run <tt>Railtie#initializer</tt> defined by railties, engines, and application.
# One by one, each engine sets up its load paths and routes, and runs its <tt>config/initializers/*</tt> files.
# 8. Custom <tt>Railtie#initializers</tt> 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.
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
# lib has to be added to $LOAD_PATH unconditionally, even if it's in the
# autoload paths and config.add_autoload_paths_to_load_path is false.
add_lib_to_load_path!(find_root(base.called_from))
ActiveSupport.run_load_hooks(:before_configuration, base)
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, :autoloaders
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
@key_generators = {}
@message_verifiers = nil
@deprecators = nil
@ran_load_hooks = false
@executor = Class.new(ActiveSupport::Executor)
@reloader = Class.new(ActiveSupport::Reloader)
@reloader.executor = @executor
@autoloaders = Rails::Autoloaders.new
# 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
@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 a key generator (ActiveSupport::CachingKeyGenerator) for a
# specified +secret_key_base+. The return value is memoized, so additional
# calls with the same +secret_key_base+ will return the same key generator
# instance.
def key_generator(secret_key_base = self.secret_key_base)
# number of iterations selected based on consultation with the google security
# team. Details at https://github.com/rails/rails/pull/6952#issuecomment-7661220
@key_generators[secret_key_base] ||= ActiveSupport::CachingKeyGenerator.new(
ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000)
)
end
# Returns a message verifier factory (ActiveSupport::MessageVerifiers). This
# factory can be used as a central point to configure and create message
# verifiers (ActiveSupport::MessageVerifier) for your application.
#
# By default, message verifiers created by this factory will generate
# messages using the default ActiveSupport::MessageVerifier options. You can
# override these options with a combination of
# ActiveSupport::MessageVerifiers#clear_rotations and
# ActiveSupport::MessageVerifiers#rotate. However, this must be done prior
# to building any message verifier instances. For example, in a
# +before_initialize+ block:
#
# # Use `url_safe: true` when generating messages
# config.before_initialize do |app|
# app.message_verifiers.clear_rotations
# app.message_verifiers.rotate(url_safe: true)
# end
#
# Message verifiers created by this factory will always use a secret derived
# from #secret_key_base when generating messages. +clear_rotations+ will not
# affect this behavior. However, older +secret_key_base+ values can be
# rotated for verifying messages:
#
# # Fall back to old `secret_key_base` when verifying messages
# config.before_initialize do |app|
# app.message_verifiers.rotate(secret_key_base: "old secret_key_base")
# end
#
def message_verifiers
@message_verifiers ||=
ActiveSupport::MessageVerifiers.new do |salt, secret_key_base: self.secret_key_base|
key_generator(secret_key_base).generate_key(salt)
end.rotate_defaults
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]
end
# A managed collection of deprecators (ActiveSupport::Deprecation::Deprecators).
# The collection's configuration methods affect all deprecators in the
# collection. Additionally, the collection's +silence+ method silences all
# deprecators in the collection for the duration of a given block.
def deprecators
@deprecators ||= ActiveSupport::Deprecation::Deprecators.new.tap do |deprecators|
deprecators[:railties] = Rails.deprecator
end
end
# Convenience for loading config/foo.yml for the current \Rails env.
#
# Examples:
#
# # 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
#
# # You can also store configurations in a shared section which will be
# # merged with the environment configuration
#
# # config/example.yml
# shared:
# foo:
# bar:
# baz: 1
#
# development:
# foo:
# bar:
# qux: 2
#
# # development environment
# Rails.application.config_for(:example)[:foo][:bar]
# # => { baz: 1, qux: 2 }
def config_for(name, env: Rails.env)
yaml = name.is_a?(Pathname) ? name : Pathname.new("#{paths["config"].existent.first}/#{name}.yml")
if yaml.exist?
require "erb"
all_configs = ActiveSupport::ConfigurationFile.parse(yaml).deep_symbolize_keys
config, shared = all_configs[env.to_sym], all_configs[:shared]
if shared
config = {} if config.nil? && shared.is_a?(Hash)
if config.is_a?(Hash) && shared.is_a?(Hash)
config = shared.deep_merge(config)
elsif config.nil?
config = shared
end
end
if config.is_a?(Hash)
config = ActiveSupport::OrderedOptions.new.update(config)
end
config
else
raise "Could not load configuration. No such file - #{yaml}"
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 ||= super.merge(
"action_dispatch.parameter_filter" => filter_parameters,
"action_dispatch.redirect_filter" => config.filter_redirect,
"action_dispatch.secret_key_base" => secret_key_base,
"action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions,
"action_dispatch.show_detailed_exceptions" => config.consider_all_requests_local,
"action_dispatch.log_rescued_responses" => config.action_dispatch.log_rescued_responses,
"action_dispatch.debug_exception_log_level" => ActiveSupport::Logger.const_get(config.action_dispatch.debug_exception_log_level.to_s.upcase),
"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.authenticated_encrypted_cookie_salt" => config.action_dispatch.authenticated_encrypted_cookie_salt,
"action_dispatch.use_authenticated_cookie_encryption" => config.action_dispatch.use_authenticated_cookie_encryption,
"action_dispatch.encrypted_cookie_cipher" => config.action_dispatch.encrypted_cookie_cipher,
"action_dispatch.signed_cookie_digest" => config.action_dispatch.signed_cookie_digest,
"action_dispatch.cookies_serializer" => config.action_dispatch.cookies_serializer,
"action_dispatch.cookies_digest" => config.action_dispatch.cookies_digest,
"action_dispatch.cookies_rotations" => config.action_dispatch.cookies_rotations,
"action_dispatch.cookies_same_site_protection" => coerce_same_site_protection(config.action_dispatch.cookies_same_site_protection),
"action_dispatch.use_cookies_with_metadata" => config.action_dispatch.use_cookies_with_metadata,
"action_dispatch.content_security_policy" => config.content_security_policy,
"action_dispatch.content_security_policy_report_only" => config.content_security_policy_report_only,
"action_dispatch.content_security_policy_nonce_generator" => config.content_security_policy_nonce_generator,
"action_dispatch.content_security_policy_nonce_directives" => config.content_security_policy_nonce_directives,
"action_dispatch.permissions_policy" => config.permissions_policy,
)
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 any server called in the instance of a new application up
# to the +server+ method defined in Rails::Railtie.
def server(&blk)
self.class.server(&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|
File.file?(path) ? files << path.to_s : 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
attr_writer :config
def secrets
Rails.deprecator.warn(<<~MSG.squish)
`Rails.application.secrets` is deprecated in favor of `Rails.application.credentials` and will be removed in Rails 7.2.
MSG
@secrets ||= begin
secrets = ActiveSupport::OrderedOptions.new
files = config.paths["config/secrets"].existent
files = files.reject { |path| path.end_with?(".enc") } unless config.read_encrypted_secrets
secrets.merge! Rails::Secrets.parse(files, env: Rails.env)
# Fallback to config.secret_key_base if secrets.secret_key_base isn't set
secrets.secret_key_base ||= config.secret_key_base
secrets
end
end
attr_writer :secrets, :credentials
# The secret_key_base is used as the input secret to the application's key generator, which in turn
# is used to create all ActiveSupport::MessageVerifier and ActiveSupport::MessageEncryptor instances,
# including the ones that sign and encrypt cookies.
#
# In development and test, this is randomly generated and stored in a
# temporary file in <tt>tmp/local_secret.txt</tt>.
#
# You can also set <tt>ENV["SECRET_KEY_BASE_DUMMY"]</tt> to trigger the use of a randomly generated
# secret_key_base that's stored in a temporary file. This is useful when precompiling assets for
# production as part of a build step that otherwise does not need access to the production secrets.
#
# Dockerfile example: <tt>RUN SECRET_KEY_BASE_DUMMY=1 bundle exec rails assets:precompile</tt>.
#
# In all other environments, we look for it first in <tt>ENV["SECRET_KEY_BASE"]</tt>,
# then +credentials.secret_key_base+, and finally +secrets.secret_key_base+. For most applications,
# the correct place to store it is in the encrypted credentials file.
def secret_key_base
if Rails.env.local? || ENV["SECRET_KEY_BASE_DUMMY"]
config.secret_key_base ||= generate_local_secret
else
validate_secret_key_base(
ENV["SECRET_KEY_BASE"] || credentials.secret_key_base || begin
secret_skb = secrets_secret_key_base
if secret_skb.equal?(config.secret_key_base)
config.secret_key_base
else
Rails.deprecator.warn(<<~MSG.squish)
Your `secret_key_base is configured in `Rails.application.secrets`,
which is deprecated in favor of `Rails.application.credentials` and
will be removed in Rails 7.2.
MSG
secret_skb
end
end
)
end
end
# Returns an ActiveSupport::EncryptedConfiguration instance for the
# credentials file specified by +config.credentials.content_path+.
#
# By default, +config.credentials.content_path+ will point to either
# <tt>config/credentials/#{environment}.yml.enc</tt> for the current
# environment (for example, +config/credentials/production.yml.enc+ for the
# +production+ environment), or +config/credentials.yml.enc+ if that file
# does not exist.
#
# The encryption key is taken from either <tt>ENV["RAILS_MASTER_KEY"]</tt>,
# or from the file specified by +config.credentials.key_path+. By default,
# +config.credentials.key_path+ will point to either
# <tt>config/credentials/#{environment}.key</tt> for the current
# environment, or +config/master.key+ if that file does not exist.
def credentials
@credentials ||= encrypted(config.credentials.content_path, key_path: config.credentials.key_path)
end
# Returns an ActiveSupport::EncryptedConfiguration instance for an encrypted
# file. By default, the encryption key is taken from either
# <tt>ENV["RAILS_MASTER_KEY"]</tt>, or from the +config/master.key+ file.
#
# my_config = Rails.application.encrypted("config/my_config.enc")
#
# my_config.read
# # => "foo:\n bar: 123\n"
#
# my_config.foo.bar
# # => 123
#
# Encrypted files can be edited with the <tt>bin/rails encrypted:edit</tt>
# command. (See the output of <tt>bin/rails encrypted:edit --help</tt> for
# more information.)
def encrypted(path, key_path: "config/master.key", env_key: "RAILS_MASTER_KEY")
ActiveSupport::EncryptedConfiguration.new(
config_path: Rails.root.join(path),
key_path: Rails.root.join(key_path),
env_key: env_key,
raise_if_missing_key: config.require_master_key
)
end
def to_app # :nodoc:
self
end
def helpers_paths # :nodoc:
config.helpers_paths
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
def load_generators(app = self) # :nodoc:
app.ensure_generator_templates_added
super
end
# Eager loads the application code.
def eager_load!
Rails.autoloaders.each(&:eager_load)
end
protected
alias :build_middleware_stack :app
def run_tasks_blocks(app) # :nodoc:
railties.each { |r| r.run_tasks_blocks(app) }
super
load "rails/tasks.rb"
task :environment do
ActiveSupport.on_load(:before_initialize) { config.eager_load = config.rake_eager_load }
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
def run_server_blocks(app) # :nodoc:
railties.each { |r| r.run_server_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_base(secret_key_base)
if secret_key_base.is_a?(String) && secret_key_base.present?
secret_key_base
elsif secret_key_base
raise ArgumentError, "`secret_key_base` for #{Rails.env} environment must be a type of String`"
else
raise ArgumentError, "Missing `secret_key_base` for '#{Rails.env}' environment, set this string with `bin/rails credentials:edit`"
end
end
def ensure_generator_templates_added
configured_paths = config.generators.templates
configured_paths.unshift(*(paths["lib/templates"].existent - configured_paths))
end
private
def generate_local_secret
if config.secret_key_base.nil?
key_file = Rails.root.join("tmp/local_secret.txt")
if File.exist?(key_file)
config.secret_key_base = File.binread(key_file)
elsif secrets_secret_key_base
config.secret_key_base = secrets_secret_key_base
else
random_key = SecureRandom.hex(64)
FileUtils.mkdir_p(key_file.dirname)
File.binwrite(key_file, random_key)
config.secret_key_base = File.binread(key_file)
end
end
config.secret_key_base
end
def secrets_secret_key_base
Rails.deprecator.silence do
secrets.secret_key_base
end
end
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
def coerce_same_site_protection(protection)
protection.respond_to?(:call) ? protection : proc { protection }
end
def filter_parameters
if config.precompile_filter_parameters
config.filter_parameters.replace(
ActiveSupport::ParameterFilter.precompile_filters(config.filter_parameters)
)
end
config.filter_parameters
end
end
end