throw new TypeError('app.use() 需要中间件函数');

Question

我正在学习有关 Nodejs 的在线课程，并试图在我的 express 应用程序中实现基本身份验证。但是我在 app.use(new localStrategy(User.Authenticate()); 上遇到错误我已尝试重新安装“passport-local”。为什么此错误一直存在？

var express = require('express'), 
app = express(), 
mongoose = require('mongoose'),
passport = require('passport'),
User = require('./models/user'),
bodyParser = require('body-parser'),
localStrategy = require('passport-local');   ;
passportLocalMongoose = require('passport-local-mongoose');
mongoose.connect('mongodb://localhost/auth_DB');

app.use(bodyParser.urlencoded({extended: true}));
app.use(express.static('images'));

app.use(require('express-session')({
    secret: 'pppppqpqsda dasdqw ksndfkjnzmmuawt8ikweabmdsfj a',
    resave: false,
    saveUninitialized: false 
}));

app.use(passport.initialize());
app.use(passport.session());
app.use(new localStrategy(User.authenticate()));

passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

app.set('view engine', 'ejs');

app.get('/', function (req, res) {
    // body...
    res.render('home');
});

app.get('/secret', function (req, res) {
    // body...
    res.render('secret');
});



app.get('/register', function (req, res) {
    // body...
    res.render('signup');
});

app.post('/register', function (req, res) {

    User.register(new User({username: req.body.username}), req.body.password, function(err, user){
        if(err){
            console.log(err);
            return res.render('signup');
        }

    passport.authenticate('local')(req, res, function(){
        res.redirect('/secret');
    });

});

});


app.get('/login', function (req, res) {
    // body...
    res.render('signin');
});

app.post('/login', passport.authenticate('local', 
              {successRedirect: '/secret', 
               failureRedirect: '/login'} ),
    function(req, res){});


app.listen(3000, function(){
    console.log('Server Started!');
});

Package.json :-

{
  "name": "test-auth",
  "version": "1.0.0",
  "description": "Testing the authentication",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Rishabh & Colt",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.17.1",
    "ejs": "^2.5.6",
    "express": "^4.15.2",
    "express-session": "^1.15.2",
    "mongoose": "^4.9.7",
    "passport": "^0.3.2",
    "passport-local": "^1.0.0",
    "passport-local-mongoose": "^4.0.0"
  }
}

User.js:-

var mongoose = require('mongoose');
var passportLocalMongoose = require('passport-local-mongoose');
var userSchema = new mongoose.Schema({
    username: String,
    password: String
});

userSchema.plugin(passportLocalMongoose);
module.exports = mongoose.model('User', userSchema); 

错误：-

C:\Users\Atom\Project\testAuth\node_modules\express\lib\application.js:210
    throw new TypeError('app.use() requires middleware functions');
    ^

TypeError: app.use() requires middleware functions
    at EventEmitter.use (C:\Users\Atom\Project\testAuth\node_modules\express\lib\application.js:210:11)
    at Object.<anonymous> (C:\Users\Atom\Project\testAuth\app.js:37:5)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:393:7)
    at startup (bootstrap_node.js:150:9)
    at bootstrap_node.js:508:3

Answer 1

您的代码有一些错字。 localStrategy 不是 express 的中间件。可以和passport一起使用。

替换

app.use(new localStrategy(User.authenticate()));

与

passport.use(new localStrategy(User.authenticate()));

Answer 2

您似乎需要错误的模块 您需要这种方式的本地策略

LocalStrategy = require('passport-local');

但在文档中，您需要添加“.Strategy”

http://passportjs.org/docs/configure

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