Unicode C++

DNS Query A Records

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Shows how to perform a DNS query to retrieve A records. Unicode C++

#include <CkDnsW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkDnsW dns;

    CkJsonObjectW json;
    json.put_EmitCompact(false);

    success = dns.Query(L"A",L"microsoft.com",json);
    if (success == false) {
        wprintf(L"%s\n",dns.lastErrorText());
        return;
    }

    wprintf(L"%s\n",json.emit());

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

    //  {
    //    "answer": {
    //      "a": [
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.112.250.133"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.231.239.246"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.76.201.171"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.70.246.20"
    //        },
    //        {
    //          "name": "microsoft.com",
    //          "ttl": 1528,
    //          "ipv4": "20.236.44.162"
    //        }
    //      ]
    //    }
    //  }

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

    const wchar_t *name = 0;
    int ttl;
    const wchar_t *ipv4 = 0;

    int i = 0;
    int count_i = json.SizeOfArray(L"answer.a");
    while (i < count_i) {
        json.put_I(i);
        name = json.stringOf(L"answer.a[i].name");
        ttl = json.IntOf(L"answer.a[i].ttl");
        ipv4 = json.stringOf(L"answer.a[i].ipv4");
        i = i + 1;
    }
    }