Rust

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.

Rust

let dns = chilkat::Dns::new();

let json = chilkat::JsonObject::new();
json.set_emit_compact(false);

if dns.query("MX", "somebody@gmail.com", &json).is_err() {
    println!("{}", dns.last_error_text());
    return;
}

println!("{}", json.emit().unwrap_or_default());

// 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

let mut i = 0;
let count_i = json.size_of_array("answer.mx");
while i < count_i {
    json.set_i(i);
    let _ = json.string_of("answer.mx[i].name").unwrap_or_default();
    let _ = json.int_of("answer.mx[i].ttl");
    let _ = json.int_of("answer.mx[i].pref");
    let _ = json.string_of("answer.mx[i].domain").unwrap_or_default();
    i = i + 1;
}