I'm using Firefox with Selenium IDE for testing a Java application. If the session expires and I launch a test, I get this http status code: 490
.
Here is a snippet that illustrates how I get this http status code.
var request = new XMLHttpRequest();
request.open('GET', url, false);
// ...
request.send(null);
if (request.status === 200) {
// ...
} else {
alert('Something bad happen!\n(' + request.status + ') ' + request.statusText);
}
The alert dialog box shows something like this:
Something bad happen!
(490) 490