Node.js

DNS Query MX Records

See more DNS Examples

Shows how to perform a DNS query to retrieve MX 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("MX","somebody@gmail.com",json);
    if (success == false) {
        console.log(dns.LastErrorText);
        return;
    }

    console.log(json.Emit());

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

    // -------------------------------------------------------------------------------
    // Note: Chilkat will return the results sorted by "pref" from lowest to highest.
    // -------------------------------------------------------------------------------

    // {
    //   "answer": {
    //     "mx": [
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 5,
    //         "domain": "gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 10,
    //         "domain": "alt1.gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 20,
    //         "domain": "alt2.gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 30,
    //         "domain": "alt3.gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 40,
    //         "domain": "alt4.gmail-smtp-in.l.google.com"
    //       }
    //     ]
    //   }
    // }

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

    var name;
    var ttl;
    var pref;
    var domain;

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


}

chilkatExample();