#class MultipleProxyMiddleware(object):
#    FORWARDED_FOR_FIELDS = [
#        'HTTP_X_FORWARDED_FOR',
#        'HTTP_X_FORWARDED_HOST',
#        'HTTP_X_FORWARDED_SERVER',
#    ]
#
#    def process_request(self, request):
#        """
#        Rewrites the proxy headers so that only the most
#        recent proxy is used.
#        """
#        for field in self.FORWARDED_FOR_FIELDS:
#            if field in request.META:
#                if ',' in request.META[field]:
#                    parts = request.META[field].split(',')
#                    request.META[field] = parts[-1].strip()