HarmonyOS DynamicDnsRule有没有示例？这个地址是怎么解析出来

/** 
 域名和端口会自行获取，不需要传入，这边需要开发者指定Ip地址数组 
 @param host 域名 
 @param _ 端口 
 @returns Ip地址数组 
 */ 
function GetDNSRule(host: string, _: number): rcp.IpAddress[] { 
  //开发者这边只需要定义这个函数，并且指定返回的Ip地址数组 
  if (host == ‘httpbin.xxx.com’) { 
    //返回的是与请求的url关联的IP地址数组，需要开发者自己指定写入 
    return [‘192.xxx.xxx.2’]; 
  } 
  return []; 
}
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dns: { 
  dnsRules: GetDNSRule, 
}
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async testDnsRequestByFetch() { 
  const session = rcp.createSession(); 
  const request = new rcp.Request('http://xxx.xxx.com'); 
  request.configuration = { 
    dns: { 
      dnsRules: GetDNSRule, 
 
    }, 
    //....... 
 
  }; 
  // request.method = 'GET'; 
  //....... 
  try { 
    const response = await session.fetch(request); 
    //....... 
  } catch (e) { 
    //....... 
  } 
} 
 
async testDnsRequestByMethod() { 
  const session = rcp.createSession({ 
    requestConfiguration: { 
      dns: { 
        dnsRules: GetDNSRule 
      }, 
      //....... 
    }, 
  }); 
  //....... 
  const response = await session.get('http://xxx.xxx.com'); 
} 
// 这个是fetch的示例代码 
let request = new rcp.Request("https://........."); 
request.configuration = { 
  security: { 
    remoteValidation: 'skip' 
  } 
}; 
request.headers = { 
  'content-type': 'application/x-www-form-urlencoded', 
  'authorization': 'Digest user=,nonce=XXXXXX:XXXXX', 
}; 
request.method = 'POST'; 
request.content = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'; 
request.configuration = { 
  transfer: { timeout: { connectMs: 10000, transferMs: 12000 }, assumesHTTP3Capable: true } 
} 
 
async function Test() { 
  let session = rcp.createSession(); 
  const resp = await session.fetch(request); 
  console.info("Rcp resp.statusCode" + resp.statusCode.toString()) 
  console.info("Rcp resp.toString()" + resp.toString()) 
}
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