71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
#
|
|
# 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()
|