XMLHttpRequest statud undefined

**a.sichel** · 2008-09-11, 16:39

Hello everybody,
i'm new in this forum and also in the development of S60 widgets.

I'm trying to execute an XMLHttpRequest from my widget(tested on the RDA service with a Nokia N95 8gb) and I don't obtain the expected results.

This is the simple code of my request:

var req;

function getXHR()
{
req = null;
try {
req = new XMLHttpRequest();

} catch (ex) {
req = null;
}

return req;
}

function getResp()
{
if(getXHR())
{

req.onreadystatechange = function()
{
if(req.readyState == 4) {
if(req.status == 200) {
document.getElementById('mainView').innerHTML = "<h4>"+req.responseText+"</h4>";
}
else
document.getElementById('mainView').innerHTML = "<h4>"+req.status+"</h4>";
}

}

req.open('GET', 'http://testwidget.site40.net/counter.php', false);
req.send(null);
}

}

I just created this simple code to visualize if the widget works correctly.

The N95 visualizes the value "undefined".

I have seen in many page of this forum if there were some suggestions but I didn't find anything...

I hope that someone could help me.

Thanks a lot, Andrea

**Bernd42** · 2008-09-17, 16:57

I have a similar problem:

GET is working fine. I get the content, readyState is as expected and status is 200.

POST is also kind of working, but the status value always is undefined but in the http monitor the status from the server is 201.

I tested the widget on an E90 and it is exactly the same on the device.

Any ideas about this?

Bernd

**rsuthar** · 2008-09-24, 09:15

You can also use prototype.js framework for handling ajax and other functions for javascript.

**ferranhalden** · 2008-12-11, 16:48

any updates about this issue..thanks

**mfabiop** · 2008-12-12, 10:58

In this line:

Code:

req.open('GET', 'http://testwidget.site40.net/counter.php', false);

When the last parameter is 'false', the 'open' method is a synchronous call. The 'readyonstatechange' function will never happen. Try to put an 'alert' inside it to test.

I think the solution is to change the last parameter to 'true', then the 'open' method will be an asynchronous call and it should work.

**ferranhalden** · 2008-12-12, 11:05

I found the following note in Internet

<Observation> The reason for using the 402 status-code instead of 401 is that Opera and Safari do not pass the 401 status-code back to the application if they do not understand the authentication mechanism. Alternatively, an undefined code like 418 could be used. </Observation>

My problem was related that I cant get the content body when a 401 response is gotten. So I am afraid this is the behavior of webkit.

**Bernd42** · 2008-12-12, 11:11

Originally Posted by mfabiop

In this line:

Code:

req.open('GET', 'http://testwidget.site40.net/counter.php', false);

When the last parameter is 'false', the 'open' method is a synchronous call. The 'readyonstatechange' function will never happen. Try to put an 'alert' inside it to test.

I think the solution is to change the last parameter to 'true', then the 'open' method will be an asynchronous call and it should work.

I used the version of the method without the boolean parameter and this is asynchronous. The onreadystatechange function gets called, but the req.status is set to undefined but should contain a value.

Bernd

**mfabiop** · 2008-12-18, 18:47

The widget will only get a HTTP status if the server send it back to the widget after a request. You can test the server executing a 'telnet url port', then a GET command. See if the server returns a HTTP status.

MF

**Bernd42** · 2008-12-18, 19:15

Well, I tested it in a Web Page before and then used the same JavaScript code in the Widgets and used exactly the same web server. I got an HTTP status in the browser but none in the Widget, so I assume that it is not a problem with the server.

Bernd

**mfabiop** · 2008-12-19, 00:45

Very strange... Could you show the code?

**asdf23** · 2009-05-18, 13:23

Originally Posted by mfabiop

Very strange... Could you show the code?

Hi ,
I too am getting the same error:

This is on the Aptana emulator.
status = 200
state = undefined

<html>
<head>
<title> Sample Widget</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script language="javascript" type="text/javascript" src="basic.js"></script>
<style type="text/css">
@import "basic.css";
</style>
<META NAME="Generator" CONTENT="Nokia WRT plug-in for Aptana Studio 1.0.0.36" />
</head>
<body onLoad="javascript:init();">
</body>
</html>

/*
* JavaScript file
*/

var socialLight;
function Soc()
{
socialLight = new XMLHttpRequest();
return socialLight;
}
function init()
{
socialLight = new Soc();
alert("init");

var url = "http://socialight.com"

alert("ON READY CHANGE");
socialLight.onreadystatechange = function()
{

alert("readystate = "+ socialLight.readystate);
alert("status = "+ socialLight.status);

if(socialLight.readystate == 4 && socialLight.status == 200)
alert("SUCCESS");
else
alert("Error");
}

alert("GET");
socialLight.open("GET", url, true);

alert("SEND");
socialLight.send(null);
}

**jappit** · 2009-05-18, 14:03

Hi asdf23,

you're mistyping the readyState property name, that in your code is written without the uppercase 'S', for example in this line:

Code:

alert("readystate = "+ socialLight.readystate);

Hope it helps,
Pit

**asdf23** · 2009-05-19, 09:03

Originally Posted by jappit

Hi asdf23,

you're mistyping the readyState property name, that in your code is written without the uppercase 'S', for example in this line:

Code:

alert("readystate = "+ socialLight.readystate);

Hope it helps,
Pit

Hi jappit,

Thanks... That indeed was the mistake..

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