一定時間后如何在Tornado Websocket中自動關閉服務器端連接

Question

我有一個Tornado Websocket服務器，該服務器具有打開連接字典：

class WebSocketHandler(tornado.websocket.WebSocketHandler):
    def open(self, *args):
        self.id = self.generate_id()
        self.stream.set_nodelay(True)

        # ... DO STUFF ...

        clients[self.id] = {"id": self.id, "time":datetime.now(), "object": self}
        self.write_message("Connection SUCCESSFUL! Thanks for connecting! Your connection ID is: %d :)" % self.id)
        print datetime.now()
        print "New connection. ID: %d" % self.id
        print "Total number of open connections: %d" % len(clients)

    def on_close(self):
        print datetime.now()
        print "Closing connection %d." % self.id 
        if self.id in clients:
            del clients[self.id]
        print "Number of open connections: %d" % len(clients)

我想自動關閉所有超過一個小時的連接。 所以像這樣：

for client in clients.values():
    if (datetime.now() - client["time"])>timedelta(minutes=60):
        client["object"].close()

但是我不知道應該把檢查和關閉舊連接放在哪里。

Answer 1

請參考此答案以進一步說明

import tornado
import datetime
class WebSocketHandler(tornado.websocket.WebSocketHandler):
    def open(self, *args):
        self.id = self.generate_id()
        self.stream.set_nodelay(True)
        self.timeout = tornado.ioloop.IOLoop.current().add_timeout(
            datetime.timedelta(minutes=60), self.explicit_close)

        # ... DO STUFF ...

        clients[self.id] = {"id": self.id, "time":datetime.now(), "object": self}
        self.write_message("Connection SUCCESSFUL! Thanks for connecting! Your connection ID is: %d :)" % self.id)
        print datetime.now()
        print "New connection. ID: %d" % self.id
        print "Total number of open connections: %d" % len(clients)

    def on_close(self):
        print datetime.now()
        print "Closing connection %d." % self.id 
        if self.id in clients:
            del clients[self.id]
        print "Number of open connections: %d" % len(clients)

    def explicit_close(self):
        self.close() # you wont even have to iterate over the clients.

按照龍卷風的IOLoop並參考問題 ，它將很容易理解。