#!/usr/bin/env python
"""A web.py application powered by gevent"""

from gevent import monkey, pool; monkey.patch_all()
from gevent.wsgi import WSGIServer
import gevent
import web
import urllib2

urls = ('/long', 'long_polling')

class long_polling:
    # Since gevent.wsgi executes each incoming connection in a separate greenlet
    # long running requests such as this one don't block one another;
    # and thanks to "monkey.patch_all()" statement at the top, thread-local storage used by web.ctx
    # becomes greenlet-local storage thus making requests isolated as they should be.
    def GET(self):
        print 'handling GET context id = %s' % (id(web.ctx._getd()), )
	urls = ['http://www.yandex.ru', 'http://www.google.ru', 'http://www.python.su']
        jobs = [gevent.spawn(self._print_head, url) for url in urls]
        gevent.joinall(jobs, 10)	
        return "".join([job.value for job in jobs])

    def _print_head(self,url):
        data = urllib2.urlopen(url).read()
        return '%s: %s bytes: %r' % (url, len(data), data[:10])

if __name__ == "__main__":
    application = web.application(urls, globals()).wsgifunc()
    pool = pool.Pool(10)

    print 'Serving on 8088...'
    WSGIServer(('', 8088), application, spawn=pool).serve_forever()