Unicode C

DNS Query A Records

See more DNS Examples

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

#include <C_CkDnsW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkDnsW dns;
    HCkJsonObjectW json;
    const wchar_t *name;
    int ttl;
    const wchar_t *ipv4;
    int i;
    int count_i;

    success = FALSE;

    dns = CkDnsW_Create();

    json = CkJsonObjectW_Create();
    CkJsonObjectW_putEmitCompact(json,FALSE);

    success = CkDnsW_Query(dns,L"A",L"microsoft.com",json);
    if (success == FALSE) {
        wprintf(L"%s\n",CkDnsW_lastErrorText(dns));
        CkDnsW_Dispose(dns);
        CkJsonObjectW_Dispose(json);
        return;
    }

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

    //  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

    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(json,L"answer.a");
    while (i < count_i) {
        CkJsonObjectW_putI(json,i);
        name = CkJsonObjectW_stringOf(json,L"answer.a[i].name");
        ttl = CkJsonObjectW_IntOf(json,L"answer.a[i].ttl");
        ipv4 = CkJsonObjectW_stringOf(json,L"answer.a[i].ipv4");
        i = i + 1;
    }



    CkDnsW_Dispose(dns);
    CkJsonObjectW_Dispose(json);

    }