Dart

DNS Query SOA Records

See more DNS Examples

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

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

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final dns = CkDns();

  final json = CkJsonObject();
  json.emitCompact = false;

  try {
    dns.query('SOA', 'x.com', json);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(json.emit());

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

  // {
  //   "answer": {
  //     "soa": [
  //       {
  //         "name": "x.com",
  //         "ttl": 1800,
  //         "mname": "alexia.ns.cloudflare.com",
  //         "rname": "dns.cloudflare.com",
  //         "serial": -1971124188,
  //         "refresh": 10000,
  //         "retry": 2400,
  //         "expire": 604800,
  //         "minttl": 1800
  //       }
  //     ]
  //   }
  // }

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

  var name = '';
  var ttl = 0;
  var mname = '';
  var rname = '';
  var serial = 0;
  var refresh = 0;
  var retry = 0;
  var expire = 0;
  var minttl = 0;

  var i = 0;
  final countI = json.sizeOfArray('answer.soa');
  while (i < countI) {
    json.i = i;
    name = json.stringOf('answer.soa[i].name');
    ttl = json.intOf('answer.soa[i].ttl');
    mname = json.stringOf('answer.soa[i].mname');
    rname = json.stringOf('answer.soa[i].rname');
    serial = json.intOf('answer.soa[i].serial');
    refresh = json.intOf('answer.soa[i].refresh');
    retry = json.intOf('answer.soa[i].retry');
    expire = json.intOf('answer.soa[i].expire');
    minttl = json.intOf('answer.soa[i].minttl');
    i++;
  }
}