code: def ajax_required(func):
      # taken from djangosnippets.org
      
      def wrap(request, *args, **kwargs):
          if not request.is_ajax():
              return HttpResponseBadRequest
          return func(request, *args, **kwargs)
      wrap.__doc__ = func.__doc__
      wrap.__name__ = func.__name__
      return wrap
docs: AJAX request required decorator
      use it in your views:
  
      @ajax_required
      def my_view(request):
          ....