React Native

DNS Query CAA Records

See more DNS Examples

Shows how to perform a DNS query to retrieve CAA 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('CAA', 'zoom.us', json);
  } catch {
    console.log(dns.lastErrorText);
    return;
  }

  console.log(json.emit());

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

  // {
  //   "answer": {
  //     "caa": [
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "iodef",
  //         "value": "mailto:security@zoom.us"
  //       },
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "issue",
  //         "value": "amazon.com"
  //       },
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "issue",
  //         "value": "digicert.com"
  //       },
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "issue",
  //         "value": "godaddy.com"
  //       },
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "issue",
  //         "value": "letsencrypt.org"
  //       },
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "issue",
  //         "value": "pki.goog"
  //       },
  //       {
  //         "name": "zoom.us",
  //         "ttl": 300,
  //         "flags": 0,
  //         "tag": "issue",
  //         "value": "sectigo.com"
  //       }
  //     ]
  //   }
  // }

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

  let name = '';
  let ttl = 0;
  let flags = 0;
  let tag = '';
  let value = '';

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