Using NTLMSSP authentication for Single Sign On, post data lost (not everytime)

Question

I have the following AJAX function that I call to send post request to a web server running in Python, using Cherrypy, which runs behind Apache:

oAjax.open("POST", "/", true);
oAjax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
oAjax.setRequestHeader("Content-length", parameters.length);
oAjax.send(parameters);

The parameters are being sent as follows:

"id=pagename&action=pageaction"

Every now and then, I get empty post data when a request is sent. This does not seem to be consistent.

Using WireShark, we get the following details for a bad request:

HTTP    543 POST /? HTTP/1.1 , NTLMSSP_NEGOTIATE

In these cases, we seem to have 0 content length, so our post data seems to have been removed.

It appears to be trying to re-authorize the session when not required, causing the post data to be lost.

Does anyone know why this would happen?

This does not occur in FireFox.

Answer 1

Using the information found on this website, I was able to solve the problem: http://support.microsoft.com/kb/251404