http.get if-else基于用户是否经过身份验证

Question

根据函数是否返回状态代码，你能否制作一个if-else语句来决定回应什么？

的NodeJS / server.js

app.get('/api/videos', function (req, res) {
    if(ensureAuthenticated){
        Video.find({}, { _id: 0, iframe: 1, title: 1 }, function (err, docs) {
            res.json(docs);
        });
    }else{
       Video2.find({}, { _id: 0, iframe: 1, title: 1 }, function (err, docs) {
            res.json(docs);
        });
});

function ensureAuthenticated(req, res, next) {
  if (!req.header('Authorization')) {
    return res.status(401).send({ message: 'Please make sure your request has an Authorization header' });
  }
  var token = req.header('Authorization').split(' ')[1];

  var payload = null;
  try {
    payload = jwt.decode(token, config.TOKEN_SECRET);
  }
  catch (err) {
    return res.status(401).send({ message: err.message });
  }

  if (payload.exp <= moment().unix()) {

    return res.status(401).send({ message: 'Token has expired' });
  }
  req.user = payload.sub;
  req.role = payload.role;
  next();
}

只允许登录用户访问我们可以执行的http.get

app.get('/api/videos', ensureAuthenticated, function (req, res)

我如何进行http.get，然后在使用Video.find（）进行身份验证之前检查ensureAuthenticated，或者在未经过身份验证时回复Video2.find（）？