macOS NTLN authentication w/ XmlHttpRequest in widget

Hey all,
I'm working on a widget that needs to access a Microsoft based web service that authenticates using NTLM.

I can't figure out a way to get an XmlHttpRequest object to use NTLM authentication.

I came across curl which seems to do this, but can't find any examples of using curl within a widget.

Can anyone point me to some examples or provide some advice on how to figure this out?

Thanks!

In case anybody is interested, I figured out how to use curl from within the widget's javascript. I first had to set the AllowSystem key to true, and then I can do something like:

var curlString = "/usr/bin/curl -u " + credentials + " -L " + Url + " --ntlm";
var output = widget.system(curlString, null).outputString;

My next step is to figure out how to execute a SOAP request using curl. Making progress though ...