HTTP Cookies and Ajax requests over HTTPS

Ok, found the solution to the cookie problem.

See XHR specs, jQuery docs and StackOverflow.

The solution to have the cookies sent when switching protocol and/or subdomain is to set the withCredentials property to true.

E.g. (using jQuery)

 $.ajax( {
   /* Setup the call */
   xhrFields: {
     withCredentials: true
   }
 });