(Unicode C++) Duplicate TLS 1.2 SOAP Request that uses .NET HttpWebRequest

This example shows how to duplicate a SOAP request that uses .NET's HttpWebRequest and requires TLS 1.2.

        string xmlRequest = "...envelope..."

        System.Net.ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

        string url = "https://www3.gsis.gr/webtax2/wsgsis/RgWsPublic/RgWsPublicPort?WSDL";
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
        req.Method = "POST";
        req.ContentType = "text/xml;charset=UTF-8";

        byte[] reqBytes = new System.Text.UTF8Encoding().GetBytes(xmlRequest);

        req.ContentLength = reqBytes.Length;

        try {
            using (System.IO.Stream reqStream = req.GetRequestStream()) {
                reqStream.Write(reqBytes, 0, reqBytes.Length);
                reqStream.Flush();
                reqStream.Close();
            }

        } catch (Exception ex) {
            actionLogger.AddError(ex.Message, null);
            actionLogger.Validate();
        }

        string xmlResponse = null;
        using (HttpWebResponse resp = (HttpWebResponse)req.GetResponse()) {
            try {
                using (System.IO.StreamReader sr = new System.IO.StreamReader(resp.GetResponseStream())) {
                    xmlResponse = sr.ReadToEnd();
                    sr.Close();
                }
            } catch (Exception ex) {
                actionLogger.AddError(ex.Message, null);
                actionLogger.Validate();
            } finally {
                resp.Close();
            }
        }

Chilkat C/C++ Library Downloads
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#include <CkHttpW.h>
#include <CkHttpRequestW.h>
#include <CkHttpResponseW.h>

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

    bool success;
    CkHttpW http;

    CkHttpRequestW req;
    req.put_HttpVerb(L"POST");
    req.put_ContentType(L"text/xml");
    req.put_SendCharset(true);
    req.put_Charset(L"utf-8");
    req.put_Path(L"/webtax2/wsgsis/RgWsPublic/RgWsPublicPort?WSDL");

    const wchar_t *xmlRequest = L"...SOAP envelope...";
    req.LoadBodyFromString(xmlRequest);

    http.put_FollowRedirects(true);

    // Chilkat will automatically offer TLS 1.2.  It is the server that
    // chooses the TLS protocol version.  Assuming the server wishes to use
    // TLS 1.2, then that is what will be used.
    CkHttpResponseW *resp = http.SynchronousRequest(L"www3.gsis.gr",443,true,req);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    const wchar_t *xmlResponse = resp->bodyStr();
    wprintf(L"%s\n",xmlResponse);

    delete resp;
    }