【发布时间】：2020-09-09 17:28:15
【问题描述】：
我是编程新手，我一直在关注 Colt Steele 的网络开发人员训练营，并试图创建一个简单的博客应用程序。我已经附上了整个代码，但我想关注的部分是
function isLoggedIn(req, res, next) {
if(req.isAuthenticated()) {
return next();
}
req.session.redirectTo = req.originalUrl;
res.redirect("/login");}
在这种情况下，我尝试使用中间件 isLoggedIn 来检查用户是否只有在登录之后才能添加新专辑或博客文章。但是点击后，如果用户已登录，则添加新专辑，它会将我带回登录页面。
经过一些研究，我尝试将 req.originalUrl 存储在 req.session.returnTo 中。这应该在我们使用中间件的任何地方存储用户 GET 请求的 URL。
登录路径如下
//handling login logic
app.post('/login', passport.authenticate("local",
{
failureRedirect: "/login"
}), (req, res) => {
let returnTo = req.session.returnTo ? req.session.returnTo : '/albums'
delete req.session.returnTo;
res.redirect(returnTo);
})
这里我从 Passport 对象中删除了 successRedirect，因此我不会过早地重定向并在回调中处理重定向到 req.session.returnTo。
我的主要假设是 next() 会运行 res.render，但它似乎没有运行，我不知道为什么。
const express = require('express'),
app = express(),
mongoose = require('mongoose'),
bodyParser = require('body-parser'),
expressSanitizer = require('express-sanitizer'),
methodOverride = require('method-override'),
passport = require('passport'),
LocalSrategy = require('passport-local'),
User = require('./models/users');
//APP CONFIG
mongoose.connect('mongodb+srv://arya123:password1234567890@crudclust-gc08c.mongodb.net/<dbname>?retryWrites=true&w=majority', {
useNewUrlParser: true,
useUnifiedTopology: true,
useFindAndModify: false
}).then(() => {
console.log('Connected to DB!')
}).catch(err => {
console.log('ERROR', err.message);
})
app.set('view engine', 'ejs');
app.use(bodyParser.urlencoded({extended: true}));
app.use(expressSanitizer());
app.use(express.static("public"));
app.use(methodOverride("_method"));
//PASSPORT CONFIG
app.use(require("express-session")({
secret: "Nico wins cutest dog!",
resave: false,
saveUnititialized: false,
cookie: { secure: true }
}));
app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalSrategy(User.authenticate()));
passport.serializeUser(User.serializeUser());
passport.serializeUser(User.deserializeUser());
//MODEL CONFIG
let cataSchema = new mongoose.Schema({
title: String,
artist: String,
body: String,
art: String
});
let Catalog = mongoose.model('Catalog', cataSchema);
// let George = new Catalog ({
// title: "All things must pass",
// artist: "George Harrison",
// body: "This is an album"
// });
// George.save();
//ROUTES
app.get('/', (req, res) => {
res.redirect('/albums');
});
app.get('/albums', (req, res) => {
Catalog.find({}, function(err, catalogs){
if(err){
console.log("ERROR!");
} else {
res.render("index", {catalogs: catalogs});
}
});
});
//NEW ALBUM
app.get('/albums/new', isLoggedIn, (req, res) => {
res.render("new");
});
//POST ROUTE
app.post('/albums', (req, res) => {
console.log(req.body);
Catalog.create(req.body.catalog, (err, newCatlog) => {
if(err){
res.render('/albums/new');
}
else{
res.redirect('/albums');
}
});
});
//SHOW
app.get('/albums/:id', (req, res) =>{
Catalog.findById(req.params.id, (err, foundCatalog) => {
if(err){
res.redirect('/albums');
}
else{
res.render('show', {catalog: foundCatalog});
}
});
});
//EDIT
app.get('/albums/:id/edit', (req, res) => {
Catalog.findById(req.params.id, (err, foundCatalog) => {
if(err){
res.redirect('/albums');
}
else{
res.render('edit', {catalog: foundCatalog})
}
});
});
//UPDATE ROUTE
app.put('/albums/:id', (req, res) => {
req.body.catalog.body = req.sanitize(req.body.catalog.body);
console.log(req.body.catalog);
console.log(req.params.id);
console.log("===================")
Catalog.findByIdAndUpdate(req.params.id, req.body.catalog, (err, updated) => {
if(err){
console.log(err);
console.log("===============");
res.redirect('/albums');
}
else{
res.redirect("/albums/"+ req.params.id);
}
});
});
//DELETE ROUTE
app.delete('/albums/:id' , (req, res) => {
Catalog.findByIdAndRemove(req.params.id, (err, removed) => {
if(err){
console.log(err);
console.log(req.params.body);
console.log("==============");
res.redirect('/albums');
}
else{
res.redirect('/albums');
}
});
});
//===========
//AUTH ROUTES
//===========
//Show register form
app.get('/register',(req, res) => {
res.render('register');
})
//SIGN UP
app.post('/register', (req, res) => {
let newUser = new User({username: req.body.username});
User.register(newUser, req.body.password, (err, user) => {
if(err){
console.log(err);
return res.redirect("register")
}
passport.authenticate("local")(req, res, () => {
res.redirect('/albums')
})
})
});
//SHOW LOGIN
app.get("/login", (req, res) => {
res.render('login')
})
//handling login logic
app.post('/login', passport.authenticate("local",
{
failureRedirect: "/login"
}), (req, res) => {
let returnTo = req.session.returnTo ? req.session.returnTo : '/albums'
delete req.session.returnTo;
res.redirect(returnTo);
})
//LOGOUT ROUTE
app.get("/logout", (req, res) => {
req.logout();
res.redirect("/albums")
})
function isLoggedIn(req, res, next) {
if(req.isAuthenticated()) {
return next();
}
req.session.redirectTo = req.originalUrl;
res.redirect("/login");
}
//PORT
const port = process.env.PORT || 3000;
app.listen(port, () =>{
console.log(`Now listening on Port: ${port}`);
})
【问题讨论】：
标签： node.js mongodb express passport.js