如何在龙卷风中设置连接超时？

Question

In my Tornado app in some situation some clients disconnect from server but my current code doesn't detect that client is disconnect from server. I currently use ping to find out if client is disconnected. here is my ping pong code:

from threading import Timer
class SocketHandler(websocket.WebSocketHandler):
    def __init__(self, application, request, **kwargs):
        # some code here
        Timer(5.0, self.do_ping).start()
    def do_ping(self):
        try:
            self.ping_counter += 1
            self.ping("")
            if self.ping_counter > 2:
                self.close()
            Timer(60, self.do_ping).start()
        except WebSocketClosedError:
            pass

    def on_pong(self, data):
        self.ping_counter = 0

now I want to set SO_RCVTIMEO in tornado instead of using ping pong method. something like this :
sock.setsockopt(socket.SO_RCVTIMEO)
Is it possible to set SO_RCVTIMEO in Tornado for close clients from server after specific time out ?

Answer 1

SO_RCVTIMEO does not do anything in an asynchronous framework like Tornado. You probably want to wrap your reads in tornado.gen.with_timeout . You'll still need to use pings to test the connection and make sure it is still working; if the connection is idle there are few guarantees about how long it will take for the system to notice. (TCP keepalives are a possibility, but these are not configurable on all platforms and generally use very long timeouts).