关于uwsgi+gevent+web.py的备忘

简单入门：
uwsgi：nginx般的优雅控制
gevent：高效、无缝的接入
web.py：简洁

关于uwsgi+web.py：

import web

urls = (
    '/(.*)', 'hello'
)
app = web.application(urls, globals())

class hello:
    def GET(self, name):
        if not name:
            name = 'World'
        return 'Hello, ' + name + '!'

application = app.wsgifunc()

执行：

./uwsgi -s /tmp/web.py.socket -w testapp

关于uwsgi+gevent：

import gevent
import gevent.socket

def bg_task():
    for i in range(1,10):
        print "background task", i
        gevent.sleep(2)

def long_task():
    for i in range(1,10):
        print i
        gevent.sleep()

def application(e, sr):

    sr('200 OK', [('Content-Type','text/html')])

    t = gevent.spawn(long_task)

    t.join()

    yield "sleeping for 3 seconds...<br/>"

    gevent.sleep(3)

    yield "done<br>"

    yield "getting some ips...<br/>"

    urls = ['www.google.com', 'www.example.com', 'www.python.org', 'projects.unbit.it']
    jobs = [gevent.spawn(gevent.socket.gethostbyname, url) for url in urls]
    gevent.joinall(jobs, timeout=2)

    for j in jobs:
        yield "ip = %s<br/>" % j.value

    # this task will goes on after request end
    gevent.spawn(bg_task)

执行：

uwsgi --loop gevent --socket :3031 --module myapp --async 100

关于gevent+web.py:

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

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


class index:
    def GET(self):
        return 'Hello, world!<br>[url=/long]/long[/url]'


class long_polling:
    def GET(self):
        print 'handling GET context id = %s' % (id(web.ctx._getd()), )
        gevent.sleep(10)  # possible to block the request indefinitely, without harming others
        return 'Hello, 10 seconds later'

if __name__ == "__main__":
    application = web.application(urls, globals()).wsgifunc()
    print 'Serving on 8088...'
    WSGIServer(('', 8088), application).serve_forever()

执行：

python model.py

三合一：

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

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


class index:
    def GET(self):
        return 'Hello, world!<br>[url=/long]/long[/url]'


class long_polling:
    def GET(self):
        print 'handling GET context id = %s' % (id(web.ctx._getd()), )
        gevent.sleep(10)  # possible to block the request indefinitely, without harming others
        return 'Hello, 10 seconds later'


application = web.application(urls, globals()).wsgifunc()
#print 'Serving on 8088...'
#WSGIServer(('', 8088), application).serve_forever()
#注释掉，就这么简单

执行：

uwsgi --loop gevent --socket :3031 --module myapp --async 100

注意：
uwsgi只支持gevent1.0以上版本，而gevent目前的stable还没有升上去，要尝新的话得要担风险。

另，我在编译uwsgi+gevent plugin时出了点问题：

引用

cc1: warnings being treated as errors
> plugins/gevent/gevent.c: In function ‘py_uwsgi_gevent_request’:
> plugins/gevent/gevent.c:190: warning: suggest explicit braces to avoid
> ambiguous ‘else’
> plugins/gevent/gevent.c:190: warning: suggest explicit braces to avoid
> ambiguous ‘else’
> plugins/gevent/gevent.c:199: warning: suggest explicit braces to avoid
> ambiguous ‘else’
> plugins/gevent/gevent.c:199: warning: suggest explicit braces to avoid
> ambiguous ‘else’
> plugins/gevent/gevent.c:216: warning: suggest explicit braces to avoid
> ambiguous ‘else’
> plugins/gevent/gevent.c:216: warning: suggest explicit braces to avoid
> ambiguous ‘else’
> make: *** [all] Error 1

这可能是gcc版本有点旧,可以用这个补丁： http://projects.unbit.it/hg/uwsgi-1.0/rev/9943f97612f2（感谢Roberto的帮助）

留此备忘，静待稳定版