gevent.py

#!/usr/bin/python
"""WSGI server example"""
from __future__ import print_function
from gevent.pywsgi import WSGIServer
import gevent
import sys
from time import *
from gevent.monkey import patch_all; patch_all()



def application(env, start_response):
    if env['PATH_INFO'] == '/':
        start_response('200 OK', [('Content-Type', 'text/html')])
        # new thay gevent.sleep(5) bằng time.sleep(5) thì nó sẽ block, cho nên về nguyên tắc nếu muốn cái gì ko block thì phải wrap nó trong
        # mấy cái wrapper của gevent 
        gevent.sleep(5)
        return [b"<b>hello world</b>"]
    else:
        start_response('404 Not Found', [('Content-Type', 'text/html')])
        return [b'<h1>Not Found</h1>']


base_env = {'GATEWAY_INTERFACE': 'CGI/1.1',
                'SERVER_SOFTWARE': 'gevent/%d.%d Python/%d.%d' % (gevent.version_info[:2] + sys.version_info[:2]),
                'SCRIPT_NAME': '',
                'wsgi.version': (1, 0),
                'wsgi.multithread': True, # XXX: Aren't we really, though?
                'wsgi.multiprocess': False,
                'wsgi.run_once': False}

if __name__ == '__main__':
    print('Serving on 8088...')
    WSGIServer(('', 8088), application, environ=base_env, backlog=1000, spawn=5).serve_forever()