(Unicode C) Duplicate curl -u user:password with Chilkat HTTP

Demonstrates how to duplicate a curl command that uses the -u username:password option. (This assumes HTTP Basic Authentication, and Chilkat requires Basic authentication to be over a TLS connection.)

Duplicates the following curl command:

curl https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "Client-Id:Secret" \
  -d "grant_type=client_credentials"

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#include <C_CkHttpW.h>
#include <C_CkHttpRequestW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    HCkHttpW http;
    HCkHttpRequestW req;
    HCkHttpResponseW resp;

    //  It requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    http = CkHttpW_Create();
    req = CkHttpRequestW_Create();

    //  The AddHeader method corresponds to the curl "-H" argument.
    CkHttpRequestW_AddHeader(req,L"Accept",L"application/json");
    CkHttpRequestW_AddHeader(req,L"Accept-Language",L"en_US");

    //  The curl "-d" argument specifies the HTTP request body.  In this case,
    //  we're sending an application/x-www-form-urlencoded request, and therefore
    //  the body contains the URL-encoded query parameters.
    CkHttpRequestW_AddParam(req,L"grant_type",L"client_credentials");

    CkHttpW_putLogin(http,L"PAYPAL_REST_API_CLIENT_ID");
    CkHttpW_putPassword(http,L"PAYPAL_REST_API_SECRET");

    //  Sends a POST request where the Content-Type is application/x-www-form-urlencoded
    resp = CkHttpW_PostUrlEncoded(http,L"https://api.sandbox.paypal.com/v1/oauth2/token",req);
    if (CkHttpW_getLastMethodSuccess(http) != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        return;
    }

    if (CkHttpResponseW_getStatusCode(resp) != 200) {
        wprintf(L"Error status code: %d\n",CkHttpResponseW_getStatusCode(resp));
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
        CkHttpResponseW_Dispose(resp);
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        return;
    }

    //  The JSON response is in the resp BodyStr property
    wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
    wprintf(L"-- Success.\n");

    CkHttpResponseW_Dispose(resp);


    CkHttpW_Dispose(http);
    CkHttpRequestW_Dispose(req);

    }