Rails::Rack::Logger < ActiveSupport::LogSubscriber

# File railties/lib/rails/rack/logger.rb, line 16
      def initialize(app, taggers = nil)
        @app          = app
        @taggers      = taggers || []
      end

# File railties/lib/rails/rack/logger.rb, line 21
      def call(env)
        request = ActionDispatch::Request.new(env)

        if logger.respond_to?(:tagged)
          logger.tagged(compute_tags(request)) { call_app(request, env) }
        else
          call_app(request, env)
        end
      end

# File railties/lib/rails/rack/logger.rb, line 32
        def call_app(request, env) # :doc:
          instrumenter = ActiveSupport::Notifications.instrumenter
          instrumenter_state = instrumenter.start "request.action_dispatch", request: request
          instrumenter_finish = -> () {
            instrumenter.finish_with_state(instrumenter_state, "request.action_dispatch", request: request)
          }

          logger.info { started_request_message(request) }
          status, headers, body = @app.call(env)
          body = ::Rack::BodyProxy.new(body, &instrumenter_finish)
          [status, headers, body]
        rescue Exception
          instrumenter_finish.call
          raise
        ensure
          ActiveSupport::LogSubscriber.flush_all!
        end

# File railties/lib/rails/rack/logger.rb, line 59
        def compute_tags(request) # :doc:
          @taggers.collect do |tag|
            case tag
            when Proc
              tag.call(request)
            when Symbol
              request.send(tag)
            else
              tag
            end
          end
        end

# File railties/lib/rails/rack/logger.rb, line 51
        def started_request_message(request) # :doc:
          'Started %s "%s" for %s at %s' % [
            request.raw_request_method,
            request.filtered_path,
            request.remote_ip,
            Time.now.to_default_s ]
        end