JWT Middleware in express not working after import - node.js

Question

This is my index.js
import express from "express";
import router from "./routes/routes.js";
import connectDB from "./db.js";
const app = express();
connectDB();
app.use(express.json());
app.use("/", router);
app.listen(3000, () => console.log("server is running on port 3000"));
This is my jwt file which uses a middleware function on posts request
import express from "express";
import jwt from "jsonwebtoken";
import authenticateToken from "./middlewares/authenticateToken.js";
const app = express();
app.use(express.json());
app.get("/", (req, res) => res.send("Node and JWT"));
app.post("/login", (req, res) => {
const user = {
id: 1,
username: "JhonDoe",
email: "Jhon#gmail.com",
};
const token = jwt.sign(user, "secret", { expiresIn: "1day" });
res.json({ token });
});
app.post("/posts", authenticateToken, (req, res) => {
const user = req.user;
res.json(user);
});
app.listen(4000, () => console.log("server is running on port 4000"));
And this is the middleware
export default function authenticateToken(req, res, next) {
const authHeader = req.headers["authorization"];
const token = authHeader && authHeader.split(" ")[1];
console.log(token);
if (!token) {
return res.status(401).json({ msg: "No token, authorization denied" });
}
try {
const user = jwt.verify(token, "secret");
req.user = user;
next();
} catch (err) {
console.log(token);
res.status(403).json({ msg: "Token is not valid" });
}
}
But when I import it, it doesn't work correctly if I show the token in the console it shows it correctly but it returns the error "token is not valid" but if I use it below the post request in the same jwt.js file it works perfectly it show me the payload, why doesn't it work when I import it?, thanks.

Answer 1

Solution
Instead of
export default function authenticateToken(req, res, next) {
const authHeader = req.headers["authorization"];
const token = authHeader && authHeader.split(" ")[1];
if (!token) {
return res.status(401).json({ msg: "No token, authorization denied" });
}
try {
const user = jwt.verify(token, "secret");
req.user = user;
next();
} catch (err) {
res.status(403).json({ msg: "Token is not valid" });
}
}
this
export default function authenticateToken(req, res, next) {
const authHeader = req.headers["authorization"];
const token = authHeader && authHeader.split(" ")[1];
if (!token) {
return res.status(401).json({ msg: "No token, authorization denied" });
}
jwt.verify(token, "secret", (err, user) => {
if (err) return res.status(403).json({ msg: "Token is not valid" });
req.user = user;
next();
});
}
Documentation https://github.com/auth0/node-jsonwebtoken#readme