(Unicode C++) Walmart v3 OAuth2 Access Token with Client Credentials

Get access token by providing Client ID and Client Secret.

For more information, see https://developer.walmart.com/#/apicenter/marketPlace/latest#apiAuthentication

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 <CkHttpW.h>
#include <CkHttpRequestW.h>
#include <CkHttpResponseW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>

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

    CkHttpW http;
    bool success;

    // Implements the following CURL command:

    // curl -X POST https://marketplace.walmartapis.com/v3/token \
    // --user clientId:clientSecret \
    // -H 'Content-Type: application/x-www-form-urlencoded' \
    // -H 'Accept: application/json' \
    // -H 'WM_SVC.NAME: Walmart Marketplace' \
    // -H 'WM_QOS.CORRELATION_ID: b3261d2d-028a-4ef7-8602-633c23200af6' \
    // -H 'WM_SVC.VERSION: 1.0.0' \
    // -d 'grant_type=client_credentials'

    CkHttpRequestW req;
    req.put_HttpVerb(L"POST");
    req.put_Path(L"/v3/token");
    req.put_ContentType(L"application/x-www-form-urlencoded");
    req.AddParam(L"grant_type",L"client_credentials");

    req.AddHeader(L"WM_QOS.CORRELATION_ID",L"b3261d2d-028a-4ef7-8602-633c23200af6");
    req.AddHeader(L"Accept",L"application/json");
    req.AddHeader(L"WM_SVC.NAME",L"Walmart Marketplace");
    req.AddHeader(L"WM_SVC.VERSION",L"1.0.0");

    // Set the "--user clientId:clientSecret" by setting the Login and Password properties
    http.put_Login(L"clientId");
    http.put_Password(L"clientSecret");

    CkHttpResponseW *resp = http.PostUrlEncoded(L"https://marketplace.walmartapis.com/v3/token",req);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    CkStringBuilderW sbResponseBody;
    resp->GetBodySb(sbResponseBody);
    CkJsonObjectW jResp;
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",jResp.emit());

    int respStatusCode = resp->get_StatusCode();
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",resp->header());
        wprintf(L"Failed.\n");
        delete resp;
        return;
    }

    delete resp;

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "access_token": "eyJraWQiOiIzN2JmOWQ5MS04ZDRkLTQwYjEtODU4NS1mNzhlZDc3MjM4MDQiLCJlbmMiOiJBMjU2R0NNIiwiYWxnIjoiZGlyIn0..bKkYKqJ5CP0Qb2Qz.wQ4TTa2nwL1rbT98BBdbTi_MRNMM0gW_5q8im6uX4olRwYiuOXjaG6TbnnFOK5fT0UzMEJUf-uybalogMH78cHP0ZyL6hONKJOMJ8VK3ThcZ4AUcqrMRBNIMFiAWSTvHJg1y5g-t-WwmZbaD589dMll7-aXG6PPncpeQA1zOyOTaELjDA4O4jimc2_7PnEdc6ETv89AKcnw1J1cPz6BPG9jpyLVX_zEZcQnxbAHYZiSFscFCzdMtpFDrPWIwWuRcV5qRlH4DghHMqKG7V2wqX1VYV_gUvLH5b2y8O6Y0u9nmkBpqTGNiMpWzNE7amFyqKExGk4Jc_ziJdsrj38cSz9a4KtZOrV6E3mN5gFFEQSNAGzrdEv2IdTfWdNgTnHopQecgrlP7EcsrmGh1ARGTWr-e7RaiL8m2Sx5i9odGj5FDJKXiDeohX-KEB-Vc2KJeLxvYAHA7nPT1_pkZDBCfpqq_6GAUBDEbDZ6mJH93TAE1YhFeR_jcdl_23lND9sHKlvHA97-fHAjEVTqu-4wVmFFelGyJD4VIBkieWn94jq_opMiz-RjyYn8Vj-tfdJy8azBNt5NkjjW7Rsque04LsfujrqHDcJHio3ukT5JKwxNv9PoHMxoHnQ5fUdF4pOzt6ZShkki-jSbhileDlClh0ufLSNYgBmy6Fz4wTZWgL-DhJOcv-7Cup95Rx35Wh7XDYTbdz_z_avtfF-f-JS5XyN20Hn-gioWdNA7DNhI1O6s7zKZ2s2iD9eFkprOLGtcJzvNVjrxKZKD6R0hrUUzDXRn95oWlJXfan-OsTNdRypfGWFqIes-n8cBhzVF69LEWIDMr6YfdkRkmCq_p_A.Bvyf-k_rnsiiuf0jGGVXvw",
    //   "token_type": "Bearer",
    //   "expires_in": 900
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    const wchar_t *access_token = 0;
    const wchar_t *token_type = 0;
    int expires_in;

    access_token = jResp.stringOf(L"access_token");
    token_type = jResp.stringOf(L"token_type");
    expires_in = jResp.IntOf(L"expires_in");
    }