def classify(self, url_path):
        """Classify an url"""
        for dict_api_url in self.user_defined_rules:
            api_url = dict_api_url['str']
            re_api_url = dict_api_url['re']
            if re_api_url.match(url_path[1:]):
                return api_url

        return self.RE_SIMPLIFY_URL.sub(r'(\\d+)/', url_path)