Https POST / GET with Qml/Qt

Recently I'm working on Nokia mobiles using Qt-Qml. I have to make a POST request to a given HTTPS Url. I'm using QML and I'm trying to do it in Javascript without any luck.

Anyone has an idea about it? It's possible to do it using Javascript in QML? Any advise on how to make it in QT?

I tried calling a function like this:

var http = new XMLHttpRequest()
var url = "myform.xsl_submit";
var params = "num=22&num2=333";
http.open("POST", url, true);

//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

http.onreadystatechange = function() {//Call a function when the state changes.
    if(http.readyState == 4 && http.status == 200) {
        print("ok");
    }else{
                print("cannot connect");
        }
}
http.send(params);