Https POST / GET with Qml/Qt

Question

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 l

Answer 1

Your if statement is wrong: The function is called several times, but only one time http.readyState = 4. So, you print error messages although there's no errors yet.

You should first check if http.readyState = 4, and then look at the status code.

Here is a minimal working example:

import QtQuick 1.1

Rectangle {
    Component.onCompleted: {
        var http = new XMLHttpRequest()
        var url = "http://localhost:8080";
        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) {
                        if (http.status == 200) {
                            console.log("ok")
                        } else {
                            console.log("error: " + http.status)
                        }
                    }
                }
        http.send(params);
    }
}

I created a local pseudo-webserver with netcat to test it:

% echo -e 'HTTP/1.1 200 OK\n\n' | nc -l 8080 
POST / HTTP/1.1
Content-Type: application/x-www-form-urlencoded;charset=UTF-8
Content-Length: 15
Connection: Keep-Alive
Accept-Encoding: gzip
Accept-Language: de-DE,en,*
User-Agent: Mozilla/5.0
Host: localhost:8080

num=22&num2=333