(C++) HTTP POST JSON and Parse JSON Response

Demonstrates how to send a JSON POST and then parse the JSON response.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <CkJsonObject.h>
#include <CkHttp.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkJsonObject json;

    success = json.LoadFile("qa_data/json/jsonBodyForHttpPost.json");
    if (success == false) {
        std::cout << json.lastErrorText() << "\r\n";
        return;
    }

    CkHttp http;

    CkHttpResponse resp;
    success = http.HttpJson("POST","https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums",json,"application/json",resp);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject jsonResp;
    jsonResp.Load(resp.bodyStr());

    jsonResp.put_EmitCompact(false);
    std::cout << jsonResp.emit() << "\r\n";

    // The JSON response to be parsed looks like this:
    // {
    //   "LifeAmount": 513.85,
    //   "LifeResidualAmount": 123.38,
    //   "CriticalIllnessAmount": 0,
    //   "CriticalIllnessResidualAmount": 0,
    //   "DisabilityAmount": 881.70,
    //   "PolicyFee": 0.00,
    //   "PolicyFeeSecondary": 0,
    //   "PolicyFeeHidden": 50.00,
    //   "PolicyFeeHiddenSecondary": 0
    // }

    // We can get the floating point numbers as strings.  Then convert to double
    // using the appropriate string-to-double conversion for your programming language.
    // For example, in C++ use atof.  In C# use Convert.ToDouble.  
    const char *lifeAmount = jsonResp.stringOf("LifeAmount");
    const char *lifeResidualAmount = jsonResp.stringOf("LifeResidualAmount");

    std::cout << "LifeAmount = " << lifeAmount << "\r\n";
    std::cout << "LifeResidualAmount = " << lifeResidualAmount << "\r\n";
    }