C++

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.

C++

#include <CkDns.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkDns dns;

    CkJsonObject json;
    json.put_EmitCompact(false);

    success = dns.Query("TXT","x.com",json);
    if (success == false) {
        std::cout << dns.lastErrorText() << "\r\n";
        return;
    }

    std::cout << json.emit() << "\r\n";

    //  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

    const char *name = 0;
    int ttl;
    const char *text = 0;

    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;
    }
    }