class PhusionPassenger::WSGI::ApplicationSpawner

Class for spawning WSGI applications.

Constants

REQUEST_HANDLER

Public Class Methods

spawn_application(*args) click to toggle source
# File lib/phusion_passenger/wsgi/application_spawner.rb, line 40
def self.spawn_application(*args)
        @@instance ||= ApplicationSpawner.new
        @@instance.spawn_application(*args)
end

Public Instance Methods

spawn_application(options) click to toggle source

Spawn an instance of the given WSGI application. When successful, an Application object will be returned, which represents the spawned application.

Raises:

  • AppInitError: The WSGI application raised an exception or called exit() during startup.

  • SystemCallError, IOError, SocketError: Something went wrong.

# File lib/phusion_passenger/wsgi/application_spawner.rb, line 53
def spawn_application(options)
        a, b = UNIXSocket.pair
        pid = safe_fork(self.class.to_s, true) do
                a.close
                
                file_descriptors_to_leave_open = [0, 1, 2, b.fileno]
                NativeSupport.close_all_file_descriptors(file_descriptors_to_leave_open)
                close_all_io_objects_for_fds(file_descriptors_to_leave_open)
                
                run(MessageChannel.new(b), options)
        end
        b.close
        Process.waitpid(pid) rescue nil
        
        channel = MessageChannel.new(a)
        return AppProcess.read_from_channel(channel)
end