ConnectionLost异常在扭体中的处理

Question

我无法处理ConnectionLost异常。我所拥有的简单例子。首先，iIset将连接到jabber服务器并对其进行ping。我用的是wokkel图书馆。然后将errback添加到发送ping的方法中。在回错中，我处理ConnectionLost错误。在那之后，我关闭了互联网连接。但我看不出这个ConnectionLost是否被处理了。我关闭应用程序中的连接，并调用所有异常处理程序。

平做得很好。

[XmlStream,client] Ping to JID(u'jabber.ru') started at HivemindPingClientProtocol 
[-] SEND: «iq to='jabber.ru' type='get' id='H_3'>/>»
[XmlStream,client] RECV: "/><feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>"

互联网连接已关闭

[-] SEND: «iq to='jabber.ru' type='get' id='H_6'>/>»
[-] SEND: «iq to='jabber.ru' type='get' id='H_7'>/>»

不调用ConnectionLost的处理程序。“在HivemindXMPPClient上关闭的流”在StreamManager中用_disconnected方法打印

[-] Protocol stopped
[-] Protocol closed
[-] Transport stopped
[XmlStream,client] Stream closed at HivemindXMPPClient

关闭流后将处理所有异常。

[XmlStream,client] Failure [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion.
[XmlStream,client] Failure [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion.] 
[XmlStream,client] Connection lost with [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.] 
[XmlStream,client] Stopping factory <hivemind.network.network_core.HivemindXmlStreamFactory object at 0xa2e904c>> 

有人能解释为什么在关闭流后会调用回错吗？实际上，我想实现一个重新连接特性(我已经使用了ReconnectingFactory，但它对ConnectionLost没有反应)。有人能给我一些例子，重新连接实现的扭曲吗？

脚本示例。运行此脚本(确保ping工作正常)。然后关闭你的互联网连接。当发生多个ping时，您需要终止脚本。如您所见，ConnectionLost错误是在关闭连接后处理的。

import sys
from twisted.python import log
from twisted.words.protocols import jabber
from twisted.internet.error import ConnectionLost
from wokkel.client import XMPPClient
from wokkel.ping import PingClientProtocol
from twisted.internet.task import LoopingCall

JID = unicode('YOUR@JABBER.ID')
PASSWORD = 'PASSWORD'
INTERVAL = 3

class SpecialPingClientProtocol(PingClientProtocol):

    def __init__(self, entity, interval):
        self.__entity = jabber.jid.internJID(entity)
        self.__interval = interval
        self.__pingLoop = None

    def _onError(self, failure):
        log.msg('Failure %s at %s' % (failure, self.__class__.__name__))
        error = failure.trap(jabber.error.StanzaError, ConnectionLost)
        if error == jabber.error.StanzaError:
            if failure.value.condition == 'feature-not-implemented':
                return None
        elif error == ConnectionLost:
            # Do some beautiful things
            log.msg('Connection is lost. I want to reconnect NOW')
        return failure

    def _sendPing(self):
        defer = self.ping(self.__entity)
        defer.addErrback(self._onError)

    def stopPing(self):
        log.msg('Ping to %s stopped at %s' % (self.__entity, self.__class__.__name__))
        if self.__pingLoop is not None and self.__pingLoop.running:
            self.__pingLoop.stop()
            self.__pingLoop = None

    def startPing(self):
        log.msg('Ping to %s started at %s ' % (self.__entity, self.__class__.__name__))
        self.__pingLoop = LoopingCall(self._sendPing)
        self.__pingLoop.start(self.__interval, now = False)

def main():
    log.startLogging(sys.stdout)
    transport = XMPPClient(jabber.jid.internJID(JID), PASSWORD)
    transport.logTraffic = True
    pinger = SpecialPingClientProtocol(JID, INTERVAL)
    pinger.setHandlerParent(transport)
    transport.startService()
    pinger.startPing()
    reactor.run()

if __name__ == '__main__':
    from twisted.internet import reactor
    main()

Answer 1

议定书包括：

clientConnectionFailed(self, connector, reason)
clientConnectionLost(self, connector, reason)

您可以覆盖两者，并调用PingClientProtocol.clientConnectionFailed和PingClientProtocol.clientConnectionLost。

假设PingClientProtocol以某种方式继承协议