express res.redirect() 在登录时不起作用

如何解决express res.redirect() 在登录时不起作用

假设我希望服务器在登录成功后将用户链接到 admin.html 页面，所以我在 '/login' 路由处理程序（POST 方法）中使用了 put res.redirect('/admin.html')。>

但是，服务器不会将用户定向到 admin.html 页面。服务器只会在用户输入用户名和密码后每次点击登录按钮时将用户重定向到主页面（路由“/”）。它无法将我重定向到 admin.html 页面。

admin.html 存储在“protected”文件夹中，我已经应用了 app.use(isLoggedIn,express.static('protected')) 所以服务器应该能够访问它。

附言user.json 用于存储用户用户名和密码信息。

import express,{NextFunction,Request,Response } from "express";
import expressSession from "express-session";
import path from "path";
import bodyParser from "body-parser";
import jsonfile from "jsonfile";
import multer from "multer";

const storage = multer.diskStorage({
  destination: function (req,file,cb) {
    cb(null,path.resolve("./public/uploads"));
  },filename: function (req,`${file.fieldname}-${Date.Now()}.${file.mimetype.split("/")[1]}`);
  },});
const upload = multer({ storage });

const app = express();

app.use(
  expressSession({
    secret: "Memo wall is fantastic",resave: true,saveUninitialized: true,})
);

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

interface Memo {
  content: String;
  image: String;
}

interface User {
    username: String;
    password: String;
  }


app.use((req: Request,res: Response,next: NextFunction) => {
  if (req.session["counter"]) {
    req.session["counter"] += 1;
  } else {
    req.session["counter"] = 1;
  }
  console.log(`req.session['counter'] is ${req.session["counter"]}`);
  next();
});

app.use(function(req: Request,next:NextFunction){
    const Now = new Date();
    // const date = Now.toISOString().replace('T','').replace(/\..*/g,'');
    const date = formatDate(Now);
    console.log(`[${date}] Request ${req.path}`);
    next();

});

app.post("/memos",upload.single("image"),async (req,res) => {
  const memos = await jsonfile.readFile("./memos.json");
  const memo = req.body;
  if (req.file) {
    memo.image = req.file.filename;
  }
  memos.push(memo);
  await jsonfile.writeFile("./memos.json",memos,{ spaces: 4 });
  // memos.push(req.body);
  // console.log(req.body)
  res.redirect("/"); //URL vs file path
  // memos.push(req.body);
});

app.get("/memos",res) => {
  const q = req.query.q;
  const memos: Memo[] = await jsonfile.readFile("./memos.json");
  if (!q) {
    res.json(memos);
  } else {
    const filteredMemos = memos.filter((memo) => memo.content.includes(q +''));
    res.json(filteredMemos);
  }
});

app.post('/login',async(req,res)=>{
    console.log(req.body);
    const users:User[] = await jsonfile.readFile("./users.json");
    const userFound = users.find(function(user){
        return user.username === req.body.username 
        && user.password === req.body.password;
    })
    if(userFound){
        req.session['user'] = userFound;
        res.redirect('/admin.html');
    }else{
        res.redirect('/');
    }

});


const isLoggedIn = (req:Request,res:Response,next:express.NextFunction)=>{

    if(req.session['user']){
        next();
    }else{
       res.redirect('/');

    }
}


app.use(express.static("public"));
app.use(isLoggedIn,express.static('protected'));


app.use(function (req: Request,res: Response) {
  res.sendFile(path.resolve("./public/404.html"));
});

app.listen(8080,function () {
  console.log("Listening at http://localhost:8080");
});

function formatDate(Now:Date){
    return Now.getFullYear()+"-"+
           (Now.getMonth()+1 +"").padStart(2,"0") + "-" +
            (Now.getDate()+"").padStart(2,"0")+" "+
            (Now.getHours()+"").padStart(2,"0")+":"+
            (Now.getMinutes()+"").padStart(2,"0")+":"+
            (Now.getSeconds()+"").padStart(2,"0");
}