(Unicode C++) multipart/form-data HTTP POST

Demonstrates how to construct and send a multipart/form-data HTTP POST.

For more information, see https://chilkatsoft.com/http_multipart_form_data_post.asp

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#include <CkHttpRequestW.h>
#include <CkBinDataW.h>
#include <CkHttpW.h>
#include <CkHttpResponseW.h>

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

    // Sends the following multipart/form-data POST:

    // POST /xyz/something HTTP/1.1
    // Host: domain
    // Content-Type: multipart/form-data; boundary=------------090708030009010000030901
    // Content-Length: 2220
    // 
    // --------------090708030009010000030901
    // Content-Disposition: form-data; name="param1"
    // 
    // value1
    // --------------090708030009010000030901
    // Content-Disposition: form-data; name="param2"
    // 
    // value2
    // --------------090708030009010000030901
    // Content-Disposition: form-data; name="starfish20"; filename="starfish20.jpg"
    // Content-Type: image/jpeg
    // 
    // JPEG DATA HERE...
    // --------------090708030009010000030901
    // Content-Disposition: form-data; name="helloWorld"; filename="helloWorld.pdf"
    // Content-Type: application/pdf
    // 
    // PDF DATA HERE...
    // --------------090708030009010000030901
    // Content-Disposition: form-data; name="tinyA"; filename="tinyA.xml"
    // Content-Type: text/xml
    // 
    // XML DATA HERE...
    // --------------090708030009010000030901--
    // 

    CkHttpRequestW req;
    req.put_HttpVerb(L"POST");
    req.put_ContentType(L"multipart/form-data");
    req.put_Path(L"/xyz/something");

    req.AddParam(L"param1",L"value1");
    req.AddParam(L"param2",L"value2");

    // Add some small files to the request. (Small so we can see what the full request looks like without too much data..)
    CkBinDataW bd;
    bool success = bd.LoadFile(L"qa_data/jpg/starfish20.jpg");
    req.AddBdForUpload(L"starfish20",L"starfish20.jpg",bd,L"image/jpeg");

    success = bd.LoadFile(L"qa_data/pdf/helloWorld.pdf");
    req.AddBdForUpload(L"helloWorld",L"helloWorld.pdf",bd,L"application/pdf");

    success = bd.LoadFile(L"qa_data/xml/tinyA.xml");
    req.AddBdForUpload(L"tinyA",L"tinyA.xml",bd,L"text/xml");

    CkHttpW http;

    CkHttpResponseW *resp = http.SynchronousRequest(L"example.com",443,true,req);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    wprintf(L"HTTP response status: %d\n",resp->get_StatusCode());

    wprintf(L"Received:\n");
    wprintf(L"%s\n",resp->bodyStr());

    delete resp;
    }