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Class: Rails::Rack::LogTailer

Relationships & Source Files
Inherits: Object
Defined in: railties/lib/rails/rack/log_tailer.rb

Class Method Summary

Instance Method Summary

Constructor Details

.new(app, log = nil) ⇒ LogTailer

[ GitHub ] 

  


# File 'railties/lib/rails/rack/log_tailer.rb', line 6



def initialize(app, log = nil)
  ActiveSupport::Deprecation.warn('LogTailer is deprecated and will be removed on Rails 5.')

  @app = app

  path = Pathname.new(log || "#{::File.expand_path(Rails.root)}/log/#{Rails.env}.log").cleanpath

  @cursor = @file = nil
  if ::File.exist?(path)
    @cursor = ::File.size(path)
    @file = ::File.open(path, 'r')
  end
end


  







Instance Method Details



  

    #call(env)  
  

  [ GitHub ]


  

  


# File 'railties/lib/rails/rack/log_tailer.rb', line 20



def call(env)
  response = @app.call(env)
  tail!
  response
end


  








  

    #tail!  
  

  [ GitHub ]


  

  


# File 'railties/lib/rails/rack/log_tailer.rb', line 26



def tail!
  return unless @cursor
  @file.seek @cursor

  unless @file.eof?
    contents = @file.read
    @cursor = @file.tell
    $stdout.print contents
  end
end