Returns ``True`` if the request is secure; that is, if it was made with
+ **New in Django development version**
+ Returns ``True`` if the request was made via an XMLHttpRequest by checking
+ the ``HTTP_X_REQUESTED_WITH`` header for the string *'XMLHttpRequest'*. The
+ If you write your own XMLHttpRequest call (on the browser side), you will
+ have to set this header manually to use this method.