为所有视图定义自定义变量

module.exports.routes = {
  // This function will be executed for all http verbs on all urls
  'all /*', function (req, res, next) {
    // Expose the function `fooBar` to all views (via the locals object)
    res.locals.fooBar = function (arg1) {
      return 'foobar' + arg1;
    };
  },
};