Question

我正在尝试将本地身份验证添加到我的node.js应用程序中。在遵循有关https://scotch.io/tutorials/easy-node-authentication-setup-and-local的教程之后，我遇到了错误：“ TypeError：app.use（）需要中间件功能”。

我认为这与我的app.js文件中的app.use（indexRoutes）有关，但是我不确定如何解决此问题？任何帮助将不胜感激。

到目前为止，这是我的代码： app.js：

var express     = require('express'),
    session     = require("express-session"),
    bodyParser  = require('body-parser'),
    app         = express().use(bodyParser.json()), //creates express http server
    passport    = require('passport'),
    sanitizer   = require('express-sanitizer'),
    mongoose    = require("mongoose"),
    cookieParser    = require('cookieparser'),
    dotnev      = require('dotenv').config(),
    https       = require('https'),
    flash       = require('connect-flash'),
    fs          = require('fs'),
    config      = require('./config/config'),
    _           = require("underscore");

require('./config/passport')(passport);
var indexRoutes = require("./routes/index")(app, passport);

app.use(bodyParser.urlencoded({extended: true}));
app.use(sanitizer());
app.use(express.static(__dirname + "/public")); //tells express to serve the contents of the public directory

app.use(cookieParser);

//no longer need to specify that the view files are .ejs
app.set("view engine", "ejs");

app.use(session({
    secret: "akjjkjnisaiuu8998323jdkadsih892rhoisdfasl",
    resave: true,
    saveUninitialized: true,
    cookie: {
        maxAge: 1200000
    }
}));

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

app.use(flash());
app.use(indexRoutes);

mongoose.connect(process.env.MONGOLAB_URL, { useNewUrlParser: true });

index.js：

var express             = require("express"),
    router              = express.Router(),
    _                   = require("underscore"),
    User                = require("../models/user"),
    auth                = require("../routes/auth"),
    config              = require('../config/config'),
    freshbooks          = require("../modules/freshbooks"),
    quickbooks          = require("../modules/quickbooks");

module.exports = function(router, passport){
    //------------------------------------//
    //***------------ROUTES------------***//
    //------------------------------------//
    router.get("/", function(req, res) {
        res.render("landing");
    });

    router.get("/register", auth.optional, function(req, res) {
        res.render("register");
    });

    router.get("/login", auth.optional, function(req, res) {
        res.render("login");
    });

    router.get("/admin", isLoggedIn, function(req, res) {
        res.render('admin', {
            user : req.user // get the user out of session and pass to template
        });
    });

    //------------------------------------//
    //***-------------AUTH-------------***//
    //------------------------------------//
    router.post('/register', passport.authenticate('local-signup', {
        successRedirect : '/admin', // redirect to the secure profile section
        failureRedirect : '/register', // redirect back to the signup page if there is an error
        failureFlash : true // allow flash messages
    }));

    router.post('/login', passport.authenticate('local-login', {
        successRedirect : '/profile', // redirect to the secure profile section
        failureRedirect : '/login', // redirect back to the signup page if there is an error
        failureFlash : true // allow flash messages
    }));

    function isLoggedIn(req, res, next) {

        // if user is authenticated in the session, carry on 
        if (req.isAuthenticated())
            return next();

        // if they aren't redirect them to the home page
        res.redirect('/');
    }

    router.get('/logout', function(req, res) {
        req.logout();
        res.redirect('/');
    });
}

在此先感谢您的帮助！

Answer 1

在app.js中

$user_name

和index.js

var { registerIndexRoutes } = require("./routes/index");
var indexRoutes = registerIndexRoutes(router, passport);
app.use(indexRoutes);

它将为您提供帮助。

Answer 2

由于该功能module.exports = function(router, passport){不是有效的中间件，因此出现错误。

来自express docs：中间件函数是可以访问请求对象（req），响应对象（res）和应用程序请求-响应周期中的下一个函数的函数。

语法如下：

function(req, res, next) {
  // Implement the middleware function based on the options object
  next()
}

req：中间件功能的HTTP响应参数，按照惯例称为“ res”。

res：中间件函数的HTTP请求参数，按照惯例称为“ req”。

next：中间件函数的回调参数，按照惯例称为“ next”。

调用此函数时，function(router, passport){：

var indexRoutes = require("./routes/index")(app, passport);

indexRoutes，包含function(router, passport)的返回值，该返回值不返回中间件函数（返回undefined）。

两种解决问题的方法：

更改您的导入：

// remove this line and put the below instead
app.use(cookieParser);

// and modify and move your import
require("./routes/index")(app, passport);

使用Express router ：将您的index.js更改为

// note your exports it's not a function, you're exporting this **router** object -> router = express.Router(),
module.exports = router;
//------------------------------------//
//***------------ROUTES------------***//
//------------------------------------//
router.get("/", function(req, res) {
  res.render("landing");
});

router.get("/register", auth.optional, function(req, res) {
  res.render("register");
});

...

并将导入更改为：

var indexRoutes = require("./routes/index");

'app.use（）需要中间件功能'-护照和节点错误

2 个答案: