simple test of multiprocessing in wsgi environment

wsgi_multiprocessing.py

#!/usr/bin/env python

"""
install web.py and mod_wsgi and put this in your apache config:

    WSGIScriptAlias /multiprocessing /home/ed/wsgi_multiprocessing.py
    AddType text/html .py

Then visit,

    http://localhost/

and compare with:

    http://localhost/?multiprocessing=1

Interestingly it seems to work just fine in single-threaded mode (without mod_wsgi):

    ./wsgi_multiprocessing.py

and visit:

    http://localhost:8080/?multiprocessing=1    
"""

import web
import multiprocessing


urls = ('/', 'index')


def x(y):
    return y


class index:

    def GET(self):
        q = web.input(multiprocessing=None)
        if q.multiprocessing:
            pool = multiprocessing.Pool(processes=1)
            pool.map(x, [1])
            return "Hello Multiprocessing!"
        else:
            return "Hello World!"


app = web.application(urls, globals())
application = app.wsgifunc()


if __name__ == "__main__":
    app.run()