| 1 | n/a | # |
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| 2 | n/a | # Example where a pool of http servers share a single listening socket |
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| 3 | n/a | # |
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| 4 | n/a | # On Windows this module depends on the ability to pickle a socket |
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| 5 | n/a | # object so that the worker processes can inherit a copy of the server |
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| 6 | n/a | # object. (We import `multiprocessing.reduction` to enable this pickling.) |
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| 7 | n/a | # |
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| 8 | n/a | # Not sure if we should synchronize access to `socket.accept()` method by |
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| 9 | n/a | # using a process-shared lock -- does not seem to be necessary. |
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| 10 | n/a | # |
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| 11 | n/a | # Copyright (c) 2006-2008, R Oudkerk |
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| 12 | n/a | # All rights reserved. |
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| 13 | n/a | # |
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| 14 | n/a | |
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| 15 | n/a | import os |
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| 16 | n/a | import sys |
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| 17 | n/a | |
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| 18 | n/a | from multiprocessing import Process, current_process, freeze_support |
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| 19 | n/a | from http.server import HTTPServer |
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| 20 | n/a | from http.server import SimpleHTTPRequestHandler |
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| 21 | n/a | |
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| 22 | n/a | if sys.platform == 'win32': |
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| 23 | n/a | import multiprocessing.reduction # make sockets pickable/inheritable |
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| 24 | n/a | |
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| 25 | n/a | |
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| 26 | n/a | def note(format, *args): |
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| 27 | n/a | sys.stderr.write('[%s]\t%s\n' % (current_process().name, format % args)) |
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| 28 | n/a | |
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| 29 | n/a | |
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| 30 | n/a | class RequestHandler(SimpleHTTPRequestHandler): |
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| 31 | n/a | # we override log_message() to show which process is handling the request |
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| 32 | n/a | def log_message(self, format, *args): |
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| 33 | n/a | note(format, *args) |
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| 34 | n/a | |
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| 35 | n/a | def serve_forever(server): |
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| 36 | n/a | note('starting server') |
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| 37 | n/a | try: |
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| 38 | n/a | server.serve_forever() |
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| 39 | n/a | except KeyboardInterrupt: |
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| 40 | n/a | pass |
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| 41 | n/a | |
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| 42 | n/a | |
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| 43 | n/a | def runpool(address, number_of_processes): |
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| 44 | n/a | # create a single server object -- children will each inherit a copy |
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| 45 | n/a | server = HTTPServer(address, RequestHandler) |
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| 46 | n/a | |
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| 47 | n/a | # create child processes to act as workers |
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| 48 | n/a | for i in range(number_of_processes - 1): |
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| 49 | n/a | Process(target=serve_forever, args=(server,)).start() |
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| 50 | n/a | |
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| 51 | n/a | # main process also acts as a worker |
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| 52 | n/a | serve_forever(server) |
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| 53 | n/a | |
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| 54 | n/a | |
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| 55 | n/a | def test(): |
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| 56 | n/a | DIR = os.path.join(os.path.dirname(__file__), '..') |
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| 57 | n/a | ADDRESS = ('localhost', 8000) |
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| 58 | n/a | NUMBER_OF_PROCESSES = 4 |
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| 59 | n/a | |
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| 60 | n/a | print('Serving at http://%s:%d using %d worker processes' % \ |
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| 61 | n/a | (ADDRESS[0], ADDRESS[1], NUMBER_OF_PROCESSES)) |
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| 62 | n/a | print('To exit press Ctrl-' + ['C', 'Break'][sys.platform=='win32']) |
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| 63 | n/a | |
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| 64 | n/a | os.chdir(DIR) |
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| 65 | n/a | runpool(ADDRESS, NUMBER_OF_PROCESSES) |
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| 66 | n/a | |
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| 67 | n/a | |
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| 68 | n/a | if __name__ == '__main__': |
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| 69 | n/a | freeze_support() |
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| 70 | n/a | test() |
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