(C++) DNS Query CAA Records

See more DNS Examples

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

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

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

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

void ChilkatSample(void)
    {
    CkDns dns;

    CkJsonObject json;
    json.put_EmitCompact(false);

    bool success = dns.Query("CAA","zoom.us",json);
    if (success == false) {
        std::cout << dns.lastErrorText() << "\r\n";
        return;
    }

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

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

    // {
    //   "answer": {
    //     "caa": [
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "iodef",
    //         "value": "mailto:security@zoom.us"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "amazon.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "digicert.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "godaddy.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "letsencrypt.org"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "pki.goog"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "sectigo.com"
    //       }
    //     ]
    //   }
    // }

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

    const char *name = 0;
    int ttl;
    int flags;
    const char *tag = 0;
    const char *value = 0;

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