因为几天我一直尝试在服务器端进行某种循环而不能成功地允许我定期更新客户端,但似乎如果你把一个循环放入服务器事件方法,它就会停止发送事件到客户端自动.我的直觉是“gevent”(或greenlets)不允许这种行为(只有客户端,使用socket.io的浏览器可以定期向服务器发出,而不是相反).我错了吗？你会如何解决这个问题？是否有可能,如果你做一个循环,与客户端(套接字)的连接会以某种方式丢失？我将附带一个小草案与模式.

// Client (socket.io) [Javascript]

client = io.connect('/space');
client.on('do_something', function (msg) {
    // Do something.
});
client.on('do_another_thing', function (msg) {
   // Do another thing.
});
client.emit('something', msg);


# Server (gevent-socketio) [Python]

@namespace('/space')
class SpaceNamespace:
    def on_something(msg):
        # This WORKS just fine cause it's out the scope of the loop.
        self.emit('do_another_thing', some_operation(msg))
        # This DOES NOT work.
        while True:
            # Each 3 seconds update the client.
            self.emit('do_something', some_operation(msg))
            time.sleep(3)
            # If you put an ipdb here, you can see like the code
            # is executed, but the browser doesn't receive any
            # event.

谢谢！

解决方法:

您需要将time.sleep(3)更改为gevent.sleep(3),这是告诉单个greenlet睡眠的方式.从docs：

gevent.sleep(seconds=0) Put the current greenlet to sleep for at least
seconds.

seconds may be specified as an integer, or a float if fractional
seconds are desired. Calling sleep with seconds of 0 is the canonical
way of expressing a cooperative yield.