(Unicode C++) Creating an application/json HTTP POST Request

Demonstrates how to create an HTTP POST request having the Content-Type application/json, where the body of the HTTP request is the following JSON:

{
   "username" : "my_username",
   "password" : "my_password",
   "validation-factors" : {
      "validationFactors" : [
         {
            "name" : "remote_address",
            "value" : "127.0.0.1"
         }
      ]
   }
}

The generated HTTP request looks like this:

POST /something HTTP/1.1
Content-Type: application/json
Accept: application/json
Host: domain
Content-Length: 216

{
  "username": "my_username",
  "password": "my_password",
  "validation-factors": {
    "validationFactors": [
      {
        "name": "remote_address",
        "value": "127.0.0.1"
      }
    ]
  }
}

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#include <CkHttpRequestW.h>
#include <CkJsonObjectW.h>
#include <CkJsonArrayW.h>

void ChilkatSample(void)
    {
    // This example demonstrates building an application/json request.

    CkHttpRequestW req;

    // The ContentType, HttpVerb, and Path properties should
    // always be explicitly set.
    req.put_HttpVerb(L"POST");
    req.put_Path(L"/something");
    req.put_ContentType(L"application/json");

    // We may wish to add an "Accept" header to the request.
    // This tells the server we'll accept an application/json response.
    req.AddHeader(L"Accept",L"application/json");

    // We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
    CkJsonObjectW json;
    json.AppendString(L"username",L"my_username");
    json.AppendString(L"password",L"my_password");
    CkJsonObjectW vFactors;
    json.AppendObject2(L"validation-factors",vFactors);
    CkJsonArrayW vArray;
    vFactors.AppendArray2(L"validationFactors",vArray);
    vArray.AddObjectAt(0);
    CkJsonObjectW factorObj;
    vArray.ObjectAt2(0,factorObj);
    factorObj.AppendString(L"name",L"remote_address");
    factorObj.AppendString(L"value",L"127.0.0.1");

    // Use the JSON for the HTTP request body
    // By default, the Emit method will output compact JSON.
    // This is best for generating the smallest size request.
    // To generate a more human-readable (pretty-printed) JSON request body,
    // set the EmitCompact property to FALSE
    json.put_EmitCompact(false);
    req.LoadBodyFromString(json.emit(),L"utf-8");

    // View the request that would be sent if HttpSReq was called:
    const wchar_t *requestMime = req.generateRequestText();
    wprintf(L"%s\n",requestMime);

    // A few important comments about the HTTP request that is generated:
    // 
    // 1) The Content-Length header is automatically generated based on the actual length of the MIME message
    //    that follows the intial (topmost) MIME header.
    // 2) The HOST header will automatically get filled in with the actual domain when HttpSReq
    //    is called
    }