ɹ͑ͬ class Foo::Bar::Baz::ApplicationController < Foo::Bar::ApplicationController include Foo::Common::Bar::Baz::AwesomeController end Α͋͘Δޫܠ [email protected]
[email protected] ɹ͑ͬ͑ͬ class Foo::Bar::Baz::ApplicationController < Foo::Bar::ApplicationController include Foo::Common::Bar::Baz::AwesomeController end module Foo::Common::Bar::Baz::AwesomeController include Common::Bar::Baz::AwesomeController end Α͋͘Δޫܠ
TracePoint class AwesomeController < ApplicationController def index TracePoint.trace(:call) do |tp| p "#{tp.method_id}@#{tp.path}:#{tp.lineno}" end end # ...
module ActiveSupport module Callbacks module Conditionals module Filters class Callback class CallTemplate class CallbackSequence class CallbackChain module ClassMethods DBMMCBDLTSCcSBJMTSBJMT [email protected]CBDLTSC def define_callbacks(*names) options = names.extract_options! names.each do |name| name = name.to_sym set_callbacks name, CallbackChain.new(name, options) module_eval <def _run_#{name}_callbacks(&block) run_callbacks #{name.inspect}, &block end def self._#{name}_callbacks get_callbacks(#{name.inspect}) end def self._#{name}_callbacks=(value) set_callbacks(#{name.inspect}, value) end def _#{name}_callbacks __callbacks[#{name.inspect}] end RUBY end end ClassMethods
DBMMCBDLTSCcSBJMTSBJMT [email protected]CBDLTSC def define_callbacks(*names) options = names.extract_options! names.each do |name| name = name.to_sym set_callbacks name, CallbackChain.new(name, options) module_eval <def _run_#{name}_callbacks(&block) run_callbacks #{name.inspect}, &block end def self._#{name}_callbacks get_callbacks(#{name.inspect}) end def self._#{name}_callbacks=(value) set_callbacks(#{name.inspect}, value) end def _#{name}_callbacks __callbacks[#{name.inspect}] end RUBY end end module ActiveSupport module Callbacks module Conditionals module Filters class Callback class CallTemplate class CallbackSequence class CallbackChain module ClassMethods ClassMethods
DBMMCBDLTSCcSBJMTSBJMT [email protected]FSDBMMCBDLTSC module AbstractController module Callbacks module ClassMethods [:before, :after, :around].each do |callback| define_method "#{callback}_action" do |*names, &blk| _insert_callbacks(names, blk) do |name, options| set_callback(:process_action, callback, name, options) end end # ... end end end end AbstractController
DBMMCBDLTSCcSBJMTSBJMT [email protected]FSDBMMCBDLTSC AbstractController module AbstractController module Callbacks # ... def process_action(*args) run_callbacks(:process_action) do super end end end end
DBMMCBDLTSCcSBJMTSBJMT [email protected]CBDLTSC def run_callbacks(kind) callbacks = __callbacks[kind.to_sym] # ... next_sequence = callbacks.compile invoke_sequence = Proc.new do # ... end # Common case: no 'around' callbacks defined if next_sequence.final? # ... else invoke_sequence.call end # ... end module ActiveSupport module Callbacks module Conditionals module Filters class Callback class CallTemplate class CallbackSequence class CallbackChain module ClassMethods Callbacks
DBMMCBDLTSCcSBJMTSBJMT [email protected]CBDLTSC class CallbackChain #:nodoc:# # ... def compile @callbacks || @mutex.synchronize do final_sequence = CallbackSequence.new @callbacks ||= @chain.reverse.inject(final_sequence) do |callback_sequence, callback| callback.apply callback_sequence end end end # ... end # An Array with a compile method. module ActiveSupport module Callbacks module Conditionals module Filters class Callback class CallTemplate class CallbackSequence class CallbackChain module ClassMethods CallbackChain CallbackΠϯελϯε͕ೖΔྻΛ ࣋ͭΫϥε
DBMMCBDLTSCcSBJMTSBJMT [email protected]CBDLTSC class CallbackChain #:nodoc:# # ... def compile @callbacks || @mutex.synchronize do final_sequence = CallbackSequence.new @callbacks ||= @chain.reverse.inject(final_sequence) do |callback_sequence, callback| callback.apply callback_sequence end end end # ... end # An Array with a compile method. module ActiveSupport module Callbacks module Conditionals module Filters class Callback class CallTemplate class CallbackSequence class CallbackChain module ClassMethods CallbackChain CallbackΠϯελϯε͕ೖΔྻΛ ࣋ͭΫϥε
DBMMCBDLTSCcSBJMTSBJMT IUUQTHJUIVCDPNSBJMTSBJMTCMPCDBBDUJWFTVQQPSUMJCBDU[email protected] class CallTemplate # :nodoc: # ... def self.build(filter, callback) case filter when Symbol new(nil, filter, [], nil) when String new( nil, :instance_exec, [:value], compile_lambda(filter) ) # ... end end # ... end module ActiveSupport module Callbacks module Conditionals module Filters class Callback class CallTemplate class CallbackSequence class CallbackChain module ClassMethods CallTemplate ίʔϧόοΫΛ࣮ߦ͢Δ ProcΛ࡞ΔΫϥε
AbstractController::Callbacks module AbstractController module Callbacks # ... def process_action(*args) run_callbacks(:process_action) do super end end end end ϞϯΩʔύονͰ͜ͷݺͼग़͠ޙʹ ͍͍ײ͡ʹॻ͖ग़ͯ͋͛ͨ͠ΒΑͦ͞͏
ϞϯΩʔύον module ActionTracer module MonkeyPatches module AbstractController module Callbacks def process_action(*args) ActionTracer.log(self) do super end end end end end end AbstractController::Callbacks#process_action ΛΦʔόʔϥΠυ
͍͍ײ͡ʹॻ͖ग़͢ class ActionTracer::Filters def self.build(controller) # ... raw_filters = controller.__callbacks[:process_action].send(:chain) raw_filters.group_by(&:kind).each do |kind, filter| filters[kind] = filter.map(&:raw_filter).map do |f| Filter.new(f, method: f.is_a?(Symbol) ? controller.method(f) : f) end end # ... end def print (@before + @around).map(&:to_a).each do |filter| ActionTracer.logger.info filter end # ... end end
I, [2020-09-23T01:51:32.772847 #2] INFO -- : [:verify_authenticity_token, “/usr/local/bundle/gems/actionpack-5.1.7/lib/action_controller/ metal/request_forgery_protection.rb", 211] ͍͍ײ͡ʹॻ͖ग़͢ class ActionTracer::Filter # ... def to_a [@filter, *@method.source_location] end end Ͱ͖ͨ
module ActionTracer def self.filter_collector @filter_collector ||= TracePoint.new(:return) do |tp| # NOTE: ActiveSupport::Callbacks::CallTemplate is a private class if tp.method_id == :expand && tp.defined_class == ActiveSupport::Callbacks::CallTemplate if tp.return_value&.first.is_a? ActionController::Base case tp.return_value[2] # ... when Symbol # filter is a method applied_filters << tp.return_value[2] end end end end end def self.applied_filters @applied_filters ||= [] end end [email protected]@USBDFS [email protected]@[email protected]
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