如何在龙卷风Websocket一段时间后自动关闭连接服务器端

Question

我有一个Tornado Websocket服务器，它有一个打开连接的字典:

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)

我想做的是自动关闭所有超过一个小时的连接。像这样:

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

但是我不知道我应该把这张支票放在哪里，关闭旧的连接

Answer 1

请参考此回答作进一步说明

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.

关注龙卷风和参考问题的iolloop，就很容易理解了。