JWT-Node 身份验证 - req.headers[''authorization"] 未定义

Question

I try to set Token then get token from header but it always shows "undefined" when i console.log(req.headers['authorization'])

Here is some code

const express = require('express');
const app = express();
const jwt = require('jsonwebtoken');
const accessTokenSecret = 'youraccesstokensecret';
app.listen(8080, () => {
    console.log('Authentication service started on port 8080');
});

I set token

app.get("/createJWT",function(req,res){
    const accessToken = jwt.sign({ username: "myName"}, accessTokenSecret);

    res.json({
        accessToken
    });
})

the middleware (I show req.headers['authorization'] is undefined)

const authenticateJWT = (req, res, next) => {
    const authHeader = req.headers['authorization'];
    console.log(authHeader)
    if (authHeader) {
        const token = authHeader.split(' ')[1];

        jwt.verify(token, accessTokenSecret, (err, user) => {
            if (err) {
                return res.sendStatus(403);
            }

            req.user = user;
            next();
        });
    } else {
        res.sendStatus(401);
    }
};

And finally, I access a route to test, req.headers['authorization'] does not have values.

app.get("/check",authenticateJWT,function(req, res){
    res.send("ok")
})

please help me, thanks

Answer 1

So when you are calling the API form the frontend or say you are checking the API with postman are you setting up the header while requesting /check ? (I am not talking about your /createJWT which creates the token and sends it as a response)

In your frontend code/postman you need to explicitly add the header authorization JWTtoken while creating an HTTP request and after that your backend will receive it. Kindly check if this is not being done.