JavaScript

Resolve Domain to IP Address

Demonstrates how to perform a DNS query to obtain A records for resolving a domain name to an IPv4 address.

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("A","microsoft.com",json);
if (success == false) {
    console.log(dns.LastErrorText);
    return;
}

console.log(json.Emit());

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

// {
//   "answer": {
//     "a": [
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.112.250.133"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.231.239.246"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.76.201.171"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.70.246.20"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.236.44.162"
//       }
//     ]
//   }
// }

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

var name;
var ttl;
var ipv4;

var i = 0;
var count_i = json.SizeOfArray("answer.a");
while (i < count_i) {
    json.I = i;
    name = json.StringOf("answer.a[i].name");
    ttl = json.IntOf("answer.a[i].ttl");
    ipv4 = json.StringOf("answer.a[i].ipv4");
    i = i+1;
}