JavaScript

DNS Query SOA Records

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

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

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

var dns = new CkDns();

var json = new CkJsonObject();
json.EmitCompact = false;

success = dns.Query("SOA","x.com",json);
if (success == false) {
    console.log(dns.LastErrorText);
    return;
}

console.log(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;
var mname;
var rname;
var serial;
var refresh;
var retry;
var expire;
var minttl;

var i = 0;
var count_i = json.SizeOfArray("answer.soa");
while (i < count_i) {
    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 = i+1;
}