dnsPromises.resolveSrv(hostname)

• hostname <string>

使用域名系统协议解析 hostname 的服务记录（SRV 记录）。当成功时，Promise 使用具有以下属性的对象数组进行解决：

¥Uses the DNS protocol to resolve service records (SRV records) for the hostname. On success, the Promise is resolved with an array of objects with the following properties:

• priority

• weight

• port

• name

{
  priority: 10,
  weight: 5,
  port: 21223,
  name: 'service.example.com'
} 拷贝