如何在Express中使用passport检查特定路线上的用户身份

const express = require('express');
const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;

const User = require('./models/user');

passport.serializeUser((user, done) => {
  done(null, user.id);
});

passport.deserializeUser((id, done) => {
  User.findById(id, (err, user) => {
    done(err, user);
  });
});

passport.use(new LocalStrategy(
  (username, password, done) => {
    User.findOne({ username: username }, (err, user) => {
      if (err) { return done(err); }
      if (!user) { return done(null, false); }
      if (!user.verifyPassword(password)) { return done(null, false); }
      return done(null, user);
    });
  }
));

app.get('/protected-route', passport.authenticate('local'), (req, res) => {
  // 用户已通过身份验证，可以继续处理请求
  res.send('您已通过身份验证！');
});