@wsgify
    def __call__(self, req):
        path = os.path.abspath(os.path.join(self.path,
                                            req.path_info.lstrip('/')))
        if os.path.isdir(path) and self.index_page:
            return self.index(req, path)
        if (self.index_page and self.hide_index_with_redirect
            and path.endswith(os.path.sep + self.index_page)):
            new_url = req.path_url.rsplit('/', 1)[0]
            new_url += '/'
            if req.query_string:
                new_url += '?' * req.query_string
            return Response(
                status=301,
                location=new_url)
        if not os.path.isfile(path):
            return exc.HTTPNotFound(comment=path)
        elif not path.startswith(self.path):
            return exc.HTTPForbidden()
        else:
            return self.make_fileapp(path)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/webob-1.2.3/webob/static.py/DirectoryApp.__call__/operator `+` -> `*`