require 'active_support/core_ext/time/conversions' require 'active_support/core_ext/object/blank' module Rails module Rack # Sets log tags, logs the request, calls the app, and flushes the logs. class Logger < ActiveSupport::LogSubscriber def initialize(app, taggers = nil) @app, @taggers = app, taggers || [] end def call(env) request = ActionDispatch::Request.new(env) if Rails.logger.respond_to?(:tagged) Rails.logger.tagged(compute_tags(request)) { call_app(request, env) } else call_app(request, env) end end protected def call_app(request, env) # Put some space between requests in development logs. if Rails.env.development? Rails.logger.info '' Rails.logger.info '' end Rails.logger.info started_request_message(request) @app.call(env) ensure ActiveSupport::LogSubscriber.flush_all! end # Started GET "/session/new" for 127.0.0.1 at 2012-09-26 14:51:42 -0700 def started_request_message(request) 'Started %s "%s" for %s at %s' % [ request.request_method, request.filtered_path, request.ip, Time.now.to_default_s ] end def compute_tags(request) @taggers.collect do |tag| case tag when Proc tag.call(request) when Symbol request.send(tag) else tag end end end end end end