TypeError：LocalStrategy需要验证回调

Question

我正在学习快速框架，其中包含passport, passport-session。现在我收到此错误

TypeError: LocalStrategy requires a verify callback（查看下图）：

告诉你什么，这个错误属于passport-session模块，但我知道，我不能更改node_modules文件夹中的任何文件，但我认为这就是它想要的！所以，我被困住了！

您也可以查看我的app.js文件：

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var expressValidator = require('express-validator');
var session = require('passport-session');
var passport = require('passport');
var localStrategy = require('passport-local').Strategy;
var multer = require('multer');
var upload = multer({dest: './uploads'});
var flash = require('connect-flash');
var mongo = require('mongodb');
var mongoose = require('mongoose')
var db = mongoose.connection;

var index = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));


//Handle Sessions
app.use(session({
  secret: 'keyboardcat',
  resave: true,
  saveUninitialized: true
}));

app.use(passport.initialize());
app.use(passport.session());

//Validator
app.use(expressValidator({
  errorFormatter: function(param, msg, value) {
      var namespace = param.split('.')
      , root    = namespace.shift()
      , formParam = root;

    while(namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param : formParam,
      msg   : msg,
      value : value
    };
  }
}));

app.use(flash());
app.use(function (req, res, next) {
  res.locals.messages = require('express-messages')(req, res);
  next();
});


app.use('/', index);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

任何人都可以帮我找到原因和解决方案吗？谢谢！

注意：我也搜索了谷歌，看到了许多类似的问题，但没有得到任何解决方案，或者他们似乎没有解决这个问题！

注意2 ：我遵循的教程，我做了与他们完全相同的步骤，但我收到错误，而不是他们！

Answer 1

您必须为本地策略定义验证功能。例如：

passport.use(new LocalStrategy(
  function(username, password, done) {
    User.findOne({ username: username }, function (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);
    });
  }
));

在passport-local github page上了解有关此身份验证策略的详情。