XMLHttpRequest problem

GaleyevMarat

Hello, I'm a newcomer in Qt Quick.
I want to use XMLHttpRequest class in order to use Twitter API. I wrote the following code:
@
import QtQuick 1.0

Rectangle {
id: container
width: 360
height: 360
Text {
text: "Hello World"
anchors.centerIn: parent
}
MouseArea {
anchors.fill: parent
onClicked: {
container.testFunction();
}
}
function testFunction(){
var xhr = new XMLHttpRequest();
xhr.onreadystatchange = function(){
if (xmlhttp.readyState == 4) {
if(xmlhttp.status == 200) {
alert(xmlhttp.responseText);
}
}
};
xhr.open('GET','http://www.google.com',true);
xhr.send();
}
}
@
But, unfortunately xmlhttp.readyState always returns "1". Would you please correct me, or drop a hint on this problem?
Thank you!

loladiro

Shouldn't it be
@
if(xhr.readyState == 4)
@

mbrasser

Hi,

With a few small tweaks:

xmlhttp -> xhr
alert -> console.log
onreadystatchange -> onreadystatechange

The following version works for me:

@
import QtQuick 1.0

Rectangle {
id: container
width: 360
height: 360
Text {
text: "Hello World"
anchors.centerIn: parent
}
MouseArea {
anchors.fill: parent
onClicked: {
container.testFunction();
}
}
function testFunction(){
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function(){
console.log("readyState updated: " + xhr.readyState)
if (xhr.readyState == 4) {
if(xhr.status == 200) {
console.log(xhr.responseText);
}
}
};
xhr.open('GET','http://www.google.com');
xhr.send();
}
}
@

Does this modified version work for you, or are you still only getting a state of 1? What platform are you running on? (with e.g. Symbian it could be that your app doesn't have sufficient networking privileges?)

Regards,
Michael

GaleyevMarat

Thank you, Michael!!!
I tried to run it from my office, which has a proxy configured, that's why it fails to run correctly, but then I reran it from my home laptop, with the fixes you mentioned, and it works just fine now! Thx, sir!!!

mbrasser

Great! Note that if you do need to get it working in a proxy situation, you should be able to use "QDeclarativeEngine::setNetworkAccessManagerFactory":http://doc.qt.nokia.com/4.7-snapshot/qdeclarativeengine.html#setNetworkAccessManagerFactory and the associated functionality.

Regards,
Michael