state/uri.js
function() {
      var args = norma('path:s?', arguments);
      var _url = url.format(_.clone(this.url));
      var _path = (args.path || '').replace(/^\//, '');
      return url.resolve(_url, _path);
    }
function() {
      var args = norma('path:s?', arguments);
      var _url = url.format(_.clone(this.url));
      var _path = (args.path || '').replace(/^\//, '');
      return url.resolve(_url, _path);
    }
append the request path.