Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
mp_webserver.py
#
# Example where a pool of http servers share a single listening socket
#
# On Windows this module depends on the ability to pickle a socket
# object so that the worker processes can inherit a copy of the server
# object. (We import `multiprocessing.reduction` to enable this pickling.)
#
# Not sure if we should synchronize access to `socket.accept()` method by
# using a process-shared lock -- does not seem to be necessary.
#
# Copyright (c) 2006-2008, R Oudkerk
# All rights reserved.
#
import os
import sys
from multiprocessing import Process, current_process, freeze_support
from BaseHTTPServer import HTTPServer
from SimpleHTTPServer import SimpleHTTPRequestHandler
if sys.platform == 'win32':
import multiprocessing.reduction # make sockets pickable/inheritable
def note(format, *args):
sys.stderr.write('[%s]\t%s\n' % (current_process().name, format%args))
class RequestHandler(SimpleHTTPRequestHandler):
# we override log_message() to show which process is handling the request
def log_message(self, format, *args):
note(format, *args)
def serve_forever(server):
note('starting server')
try:
server.serve_forever()
except KeyboardInterrupt:
pass
def runpool(address, number_of_processes):
# create a single server object -- children will each inherit a copy
server = HTTPServer(address, RequestHandler)
# create child processes to act as workers
for i in range(number_of_processes-1):
Process(target=serve_forever, args=(server,)).start()
# main process also acts as a worker
serve_forever(server)
def test():
DIR = os.path.join(os.path.dirname(__file__), '..')
ADDRESS = ('localhost', 8000)
NUMBER_OF_PROCESSES = 4
print 'Serving at http://%s:%d using %d worker processes' % \
(ADDRESS[0], ADDRESS[1], NUMBER_OF_PROCESSES)
print 'To exit press Ctrl-' + ['C', 'Break'][sys.platform=='win32']
os.chdir(DIR)
runpool(ADDRESS, NUMBER_OF_PROCESSES)
if __name__ == '__main__':
freeze_support()
test()