Node.js

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.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var dns = new chilkat.Dns();

    var json = new chilkat.JsonObject();
    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;
    }


}

chilkatExample();