vendor/rails/railties/lib/rails/mongrel_server/handler.rb

   1 # Copyright (c) 2005 Zed A. Shaw
   2 # You can redistribute it and/or modify it under the same terms as Ruby.
   3 #
   4 # Additional work donated by contributors.  See http://mongrel.rubyforge.org/attributions.html
   5 # for more information.
   6
   7 require 'mongrel'
   8 require 'cgi'
   9 require 'action_controller/dispatcher'
  10
  11
  12 module Rails
  13   module MongrelServer
  14     # Implements a handler that can run Rails and serve files out of the
  15     # Rails application's public directory.  This lets you run your Rails
  16     # application with Mongrel during development and testing, then use it
  17     # also in production behind a server that's better at serving the
  18     # static files.
  19     #
  20     # The RailsHandler takes a mime_map parameter which is a simple suffix=mimetype
  21     # mapping that it should add to the list of valid mime types.
  22     #
  23     # It also supports page caching directly and will try to resolve a request
  24     # in the following order:
  25     #
  26     # * If the requested exact PATH_INFO exists as a file then serve it.
  27     # * If it exists at PATH_INFO+".html" exists then serve that.
  28     # * Finally, construct a Mongrel::CGIWrapper and run Dispatcher.dispatch to have Rails go.
  29     #
  30     # This means that if you are using page caching it will actually work with Mongrel
  31     # and you should see a decent speed boost (but not as fast as if you use a static
  32     # server like Apache or Litespeed).
  33     class RailsHandler < Mongrel::HttpHandler
  34       # Construct a Mongrel::CGIWrapper and dispatch.
  35       def process(request, response)
  36         return if response.socket.closed?
  37
  38         cgi = Mongrel::CGIWrapper.new(request, response)
  39         cgi.handler = self
  40         # We don't want the output to be really final until we're out of the lock
  41         cgi.default_really_final = false
  42
  43         ActionController::Dispatcher.dispatch(cgi, ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS, response.body)
  44
  45         # This finalizes the output using the proper HttpResponse way
  46         cgi.out("text/html",true) {""}
  47       rescue Errno::EPIPE
  48         response.socket.close
  49       rescue Object => rails_error
  50         STDERR.puts "#{Time.now.httpdate}: Error dispatching #{rails_error.inspect}"
  51         STDERR.puts rails_error.backtrace.join("\n")
  52       end
  53     end
  54   end
  55 end