srvconnect.py 文件源码

def connect(self):
        """Start connection to remote server."""
        self.factory.doStart()
        self.factory.startedConnecting(self)

        if not self.servers:
            if self.domain is None:
                self.connectionFailed(error.DNSLookupError("Domain is not defined."))
                return
            d = client.lookupService('_%s._%s.%s' % (self.service,
                                                     self.protocol,
                                                     self.domain))
            d.addCallback(self._cbGotServers)
            d.addCallback(lambda x, self=self: self._reallyConnect())
            d.addErrback(self.connectionFailed)
        elif self.connector is None:
            self._reallyConnect()
        else:
            self.connector.connect()