vendor/rails/railties/lib/rails/rack/logger.rb

   1 module Rails
   2   module Rack
   3     class Logger
   4       EnvironmentLog = "#{File.expand_path(Rails.root)}/log/#{Rails.env}.log"
   5
   6       def initialize(app, log = nil)
   7         @app = app
   8         @path = Pathname.new(log || EnvironmentLog).cleanpath
   9         @cursor = ::File.size(@path)
  10         @last_checked = Time.now
  11       end
  12
  13       def call(env)
  14         response = @app.call(env)
  15         ::File.open(@path, 'r') do |f|
  16           f.seek @cursor
  17           if f.mtime > @last_checked
  18             contents = f.read
  19             @last_checked = f.mtime
  20             @cursor += contents.length
  21             print contents
  22           end
  23         end
  24         response
  25       end
  26     end
  27   end
  28 end