code: function(pathname) {
          // 如果在路径配置中显示忽略这个路径，那就直接忽略之
          var ignore = this._options.ignore;
          if (ignore) {
              if (pathname.indexOf(ignore) == 0) {
                  return false;
              }
          }
  
          // 如果不存在配置信息，那就直接返回
          var pathsConfig = this._config.paths;
          if (!pathsConfig) return null;
  
          var path2RegMap = this._path2RegMap;
          for (var path in pathsConfig) {
              var reg = path2RegMap[path] || (path2RegMap[path] = path2reg(path, []));
              if (reg.test(pathname)) {
                  return pathsConfig[path];
              }
          }
  
          return null;
      }
docs: 获得该路径的配置信息
  @param pathname
  @private