SMHService.dnsFetch = QCloudHttpClient.QCloudDnsFetch { hostname ->
        //根据hostname获取对应的IP列表
        //返回对应的InetAddress列表
        return inetAddressList;
    }
}

SMHService.dnsFetch = QCloudHttpClient.QCloudDnsFetch { hostname ->
    val ips = MSDKDnsResolver.getInstance().getAddrByName(hostname)
    val ipArr = ips.split(";")
    if (ipArr.isEmpty()) {
        emptyList<InetAddress>()
    } else {
        val inetAddressList: MutableList<InetAddress> = ArrayList(ipArr.size)
        for (ip in ipArr) {
            if ("0" == ip) {
                continue
            }
            try {
                val inetAddress = InetAddress.getByName(ip)
                inetAddressList.add(inetAddress)
            } catch (ignored: UnknownHostException) {
            }
        }
        inetAddressList
    }
}