C++

DNS Query SOA Records

See more DNS Examples

Shows how to perform a DNS query to retrieve SOA 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("SOA","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": {
    //     "soa": [
    //       {
    //         "name": "x.com",
    //         "ttl": 1800,
    //         "mname": "alexia.ns.cloudflare.com",
    //         "rname": "dns.cloudflare.com",
    //         "serial": -1971124188,
    //         "refresh": 10000,
    //         "retry": 2400,
    //         "expire": 604800,
    //         "minttl": 1800
    //       }
    //     ]
    //   }
    // }

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

    const char *name = 0;
    int ttl;
    const char *mname = 0;
    const char *rname = 0;
    int serial;
    int refresh;
    int retry;
    int expire;
    int minttl;

    int i = 0;
    int count_i = json.SizeOfArray("answer.soa");
    while (i < count_i) {
        json.put_I(i);
        name = json.stringOf("answer.soa[i].name");
        ttl = json.IntOf("answer.soa[i].ttl");
        mname = json.stringOf("answer.soa[i].mname");
        rname = json.stringOf("answer.soa[i].rname");
        serial = json.IntOf("answer.soa[i].serial");
        refresh = json.IntOf("answer.soa[i].refresh");
        retry = json.IntOf("answer.soa[i].retry");
        expire = json.IntOf("answer.soa[i].expire");
        minttl = json.IntOf("answer.soa[i].minttl");
        i = i + 1;
    }
    }