client.py 文件源码

def lookupZone(self, name, timeout = 10):
        """
        Perform an AXFR request. This is quite different from usual
        DNS requests. See http://cr.yp.to/djbdns/axfr-notes.html for
        more information.
        """
        address = self.pickServer()
        if address is None:
            return defer.fail(IOError('No domain name servers available'))
        host, port = address
        d = defer.Deferred()
        controller = AXFRController(name, d)
        factory = DNSClientFactory(controller, timeout)
        factory.noisy = False #stfu

        from twisted.internet import reactor
        connector = reactor.connectTCP(host, port, factory)
        controller.timeoutCall = reactor.callLater(timeout or 10,
                                                   self._timeoutZone,
                                                   d, controller,
                                                   connector,
                                                   timeout or 10)
        return d.addCallback(self._cbLookupZone, connector)