Multi tool use

How to use C++ /WinRT HttpRequestMessage with Custom POST Body and HttpFormUrlEncodedContent (UWP App)

In Windows 10, 1803 it is possible to call the WinRT from standard conforming C++. The C++ /CX language extensions are not required anymore.

I already know how to send a post Request to a Server using the HttpRequestMessage Class:

#pragma comment(lib, "windowsapp")

#include "pch.h"
#include "winrt/Windows.Web.Http.Filters.h"
#include "winrt/Windows.Web.Http.Headers.h"
#include <winrt/Windows.Foundation.h>
#include <winrt/Windows.Foundation.Collections.h>
#include <string_view>

using namespace winrt;
using namespace Windows::Foundation;
using namespace Windows::Web::Http;
using namespace Windows::Web::Http::Filters;
using namespace Windows::Web::Http::Headers;
using namespace Windows::Foundation::Collections;
using namespace std::literals;
using namespace std;


IAsyncAction HttpClientExample(Uri uri)
{
HttpBaseProtocolFilter filter;
HttpClient httpClient(filter);
HttpRequestMessage loginRequest(HttpMethod::Post(), uri);

try
{

auto response{ co_await httpClient.SendRequestAsync(loginRequest) };
HttpCookieCollection cookieCollection = filter.CookieManager().GetCookies(uri);
wcout << cookieCollection.Size() << L" cookies found." << endl;

for (HttpCookie cookie : cookieCollection) {
wcout << L"Name: " << cookie.Name().c_str() << endl;
wcout << L"Domain: " << cookie.Domain().c_str() << endl;
wcout << L"Path: " << cookie.Path().c_str() << endl;
wcout << L"Value: " << cookie.Value().c_str() << endl;
}
}
catch (winrt::hresult_error const& ex)
{
// Details in ex.message() and ex.to_abi().
}
}

int main() {

init_apartment();

Uri uri{ L"http://www.google.com/"sv };

HttpClientExample(uri);

Sleep(10000);
}


How do i set a Custom Header using HttpFormUrlEncodedContent and how do i set custom content in the POST Body?

Thank you for your help!

application/x-www-form-urlencoded

<uri>?<key1>=<val1>&<key2>=<val2>&...

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