我正在使用：
所以登录过程顺利，但在退出时我遇到了问题：
//routes/users.js
//logout
router.get("/logout",(req,res)=>{
req.logout();
req.flash("success_msg","You are logged out");
console.log(req.user);
res.render("users/login");
});
//views/users/login.js
{{user}}
//app.js:
// Setting Global variables:
app.use(function(req,res,next){
res.locals.success_msg = req.flash("success_msg");
res.locals.error_msg = req.flash("error_msg");
res.locals.error = req.flash("error");
res.locals.user = req.user || null;
next();
});
所以问题在于，当我退出登录时，我被重定向到登录视图，但用户对象仍然存在（非空），当我刷新用户初始化为null时，
所以我的问题是为什么用户在重定向之前还没有设置为null？
完整文件代码：（app.js，routes / users.js，/ config / passport.js）
* app.js
const express = require('express');
const methodOverride = require('method-override');
const mongoose = require('mongoose');
const exphbs = require('express-handlebars');
const bodyParser = require('body-parser');
const flash = require('connect-flash');
const session = require('express-session');
//const path = require("path");
const passport = require('passport');
const app=express();
// load routes :
const ideas = require("./routes/ideas");
const users = require("./routes/users");
//---------------Mongoose Connect-----------------------
//Map global promise = get rid of warning
mongoose.Promise = global.Promise;
//Connect to mongoose
mongoose.connect('mongodb://localhost/vidjot-db',{
useMongoClient: true
})
.then(function(){
console.log("MongoDB connected ...");
})
.catch(err => console.log(err));
//----------------Middlewares set in Use-----------------
// Static folder Set:
//app.use(express.static(path.join(__dirname,'public')));
app.use(express.static('public'));
// Session middleware :
app.use(session({
secret: 'mySecret',
resave: true,
saveUninitialized: true,
//cookie: { secure: true }
}));
// passport middleware :
app.use(passport.initialize());
app.use(passport.session());
// handlebars middleware :
app.engine('handlebars', exphbs({defaultLayout: 'main'}));
app.set('view engine', 'handlebars');
// body parser middleware :
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }));
// parse application/json
app.use(bodyParser.json());
//methodOverride middleware:
app.use(methodOverride('_method'));
//Connect flash middleware:
app.use(flash());
//----------------My Own Middlewares-----------------
// Setting Global variables:
app.use(function(req,res,next){
res.locals.success_msg = req.flash("success_msg");
res.locals.error_msg = req.flash("error_msg");
res.locals.error = req.flash("error");
console.log("res.locals.user");
res.locals.user = req.user || null;
next();
});
/* app.use(function(req,res,next){
console.log("3ale rou7i");
console.log(Date.now());
req.att_x="karim";
next();
}) */
app.use(function(req,res,next){
console.log("hani ne5dem");
next();
});
//-----------------Routes-----------------------------
// Index Route:
app.get("/",(req,res) => {
res.render('index');
//console.log("get callback");
});
// about Route:
app.get("/about",(req,res)=>{
res.render("about",{title:"about1"});
});
// Use routes :
app.use("/ideas",ideas);
app.use("/users",users);
//--------------------------------------------------
//call local-strategy:
require("./config/passport")(passport);
//--------------------------------------------------
const port=5000;
app.listen(port,()=>{
console.log(`server started on port ${port}`);
});
* routes/users.js:
const express = require("express");
const mongoose = require("mongoose");
const bcrypt = require('bcryptjs');
const passport = require("passport");
const router = express.Router();
//--------------------------------------------------
// Load User Model:
require('../models/User');
const User = mongoose.model('Users');
//--------------------------------------------------
//login form
router.get("/login",(req,res)=>{
res.render("users/login");
});
//handle login form:
router.post('/login',
passport.authenticate('local', {
successRedirect: '/ideas',
failureRedirect: '/users/login',
failureFlash:true,
})
);
//logout
router.get("/logout",(req,res)=>{
req.logout();
req.flash("success_msg","You are logged out");
console.log("routes users",req.user);
res.render("users/login");
});
//register form
router.get("/register",(req,res)=>{
res.render("users/register");
});
// handle register form
router.post("/register",(req,res)=>{
let errors=[];
if(req.body.password != req.body.password2)
errors.push({"text":"password do not match"});
if(req.body.password.length < 4)
errors.push({"text":"password must be at least 8 characters"});
if(errors.length > 0)
res.render("users/register",{
errors:errors,
name:req.body.name,
email:req.body.email,
});
else{
User.findOne({email:req.body.email})
.then(user=>{
if(user){
req.flash("error_msg","email already registred");
res.render("/users/login");
}else{
const newUser = new User({
name:req.body.name,
email:req.body.email,
password:req.body.password,
date:req.body.date,
});
bcrypt.hash(newUser.password, 10, function(err, hash) {
if (err) throw err;
newUser.password=hash;
newUser
.save()
.then(user=>{
req.flash("success_msg","You are registered, You can connect Now");
res.redirect("/users/login");
}).catch(err=>{
console.log(err);
return;
});
});
}
})
}
});
//--------------------------------------------------
module.exports = router;
* config/passport.js :
const mongoose = require('mongoose');
const bcrypt = require("bcryptjs");
const LocalStrategy = require("passport-local").Strategy;
const passport = require("passport");
//-------------------------------------------------------
// Load User Model:
require('../models/User');
const User = mongoose.model('Users');
//-------------------------------------------------------
module.exports=function(passport){
passport.use(
new LocalStrategy({usernameField:'email'},function(email, password, done){
User.findOne({'email':email},function(err, user) {
if (err)
return done(err);
if (!user)
return done(null, false,{message:"You are not registred"});
if (!bcrypt.compareSync(password,user.password) ){
return done(null, false,{message:"Missing email or password !"});
}
return done(null, user);
});
}));
passport.serializeUser(function(user, done) {
console.log("SERIALIZE");
done(null, user.id);
});
passport.deserializeUser(function(id, done) {
console.log("DESERIALIZE");
User.findById(id, function(err, user) {
done(err, user);
});
});
}
答案 0 :(得分：0)
您有中间件根据每个请求的登录用户设置res.locals。
您的res.render()模板在呈现网页时会使用res.locals数据。
当您致电req.logout()时，没有人会清除用户仍然登录时已设置的res.locals，因此res.locals.user现在不准确。
因此，在注销后调用res.render()时，仍然会设置res.locals，就好像用户已登录一样，因此页面会以这种方式呈现。
一个简单的解决方案是在您注销时清除本地人员，这样他们就不会错误地指示用户仍然登录：
//routes/users.js
//logout
router.get("/logout",(req,res)=>{
req.logout();
// clear user before rendering to indicate logged out
res.locals.user = null;
req.flash("success_msg","You are logged out");
console.log(req.user);
res.render("users/login");
});