React Native

DNS Query AAAA Records

See more DNS Examples

Shows how to perform a DNS query to retrieve AAAA records.

Note: This example requires Chilkat v9.5.0.96 or later.

React Native

import { Dns, JsonObject } from '@chilkat/react-native'

async function chilkatExample() {
  const dns = new Dns();

  const json = new JsonObject();
  json.emitCompact = false;

  try {
    await dns.queryAsync('AAAA', 'x.com', json);
  } catch {
    console.log(dns.lastErrorText);
    return;
  }

  console.log(json.emit());

  // Sample response.
  // Parsing code below..

  // {
  //   "answer": {
  //     "aaaa": [
  //       {
  //         "name": "x.com",
  //         "ttl": 229,
  //         "ipv6": "2606:4700:4400::ac40:96f2"
  //       },
  //       {
  //         "name": "x.com",
  //         "ttl": 229,
  //         "ipv6": "2606:4700:4400::6812:250e"
  //       }
  //     ]
  //   }
  // }

  // Use this online tool to generate parsing code from sample JSON: 
  // Generate Parsing Code from JSON

  let name = '';
  let ttl = 0;
  let ipv6 = '';

  let i = 0;
  const countI = json.sizeOfArray('answer.aaaa');
  while (i < countI) {
    json.i = i;
    name = json.stringOf('answer.aaaa[i].name');
    ttl = json.intOf('answer.aaaa[i].ttl');
    ipv6 = json.stringOf('answer.aaaa[i].ipv6');
    i++;
  }
}