Java

DNS Query TXT Records

See more DNS Examples

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

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

Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkDns dns = new CkDns();

    CkJsonObject json = new CkJsonObject();
    json.put_EmitCompact(false);

    success = dns.Query("TXT","x.com",json);
    if (success == false) {
        System.out.println(dns.lastErrorText());
        return;
        }

    System.out.println(json.emit());

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

    // {
    //   "answer": {
    //     "txt": [
    //       {
    //         "name": "x.com",
    //         "ttl": 300,
    //         "text": "kkdl3qb3tcrmdhfsm803p67r0my0svs8"
    //       },
    //       {
    //         "name": "x.com",
    //         "ttl": 300,
    //         "text": "v=spf1 ip4:199.16.156.128/26 ip4:199.59.150.64/26 include:_spf.google.com include:spf-008d0a01.pphosted.com -all"
    //       },
    //       {
    //         "name": "x.com",
    //         "ttl": 300,
    //         "text": "google-site-verification=8yQmoVhQedzlt36RPeQP41ytrEFk9aHEnde_xm0626g"
    //       },
    //       {
    //         "name": "x.com",
    //         "ttl": 300,
    //         "text": "google-site-verification=F6u9mGL--d2lbLljvH3b1UUgXtevQPdcamKr9c8914A"
    //       }
    //     ]
    //   }
    // }

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

    String name;
    int ttl;
    String text;

    int i = 0;
    int count_i = json.SizeOfArray("answer.txt");
    while (i < count_i) {
        json.put_I(i);
        name = json.stringOf("answer.txt[i].name");
        ttl = json.IntOf("answer.txt[i].ttl");
        text = json.stringOf("answer.txt[i].text");
        i = i+1;
        }
  }
}