CODEWITHSUNDEEP
node.jsexpressjwtpayload
ilia
ilia

Reputation: 339

JWT-TypeError: Cannot read property 'id' of undefined

hello i am creating token validation (JWT) and this error came up here is the code of JWT signing token:

 if (user) {
      const payload = user._id
        console.log(payload)

        console.log(process.env.SECRET)
        const token = jwt.sign({id :payload}, process.env.SECRET, {
            expiresIn: 10
        })

        console.log(token)
     res.cookie('token', token, {
            httpOnly: true
        });

and verifying it (in middleware)

const token = req.body.token ||
    req.query.token ||
    req.headers['x-access-token'] ||
    req.cookies.token;

if (!token) {
   res.status(401).send({auth: false})
}
else{
jwt.verify(token, process.env.SECRET, function (err, decoded) {
    if (err){ 
        res.status(500).send({
        message: err.message
    })
} 

    req.userId = decoded.id

    next()
  })

}

i do not know the problem, i think i did everything according to docs but this error still shows up if anyone knows the solving for this problem i would be glad if i hear it thanks!

Upvotes: 0

Views: 4200

Answers (1)

Marcos Casagrande
Marcos Casagrande

Reputation: 40404

If jwt.verify fails, you're trying to access decoded.id which does not exist. So issue a return inside if(err) otherwise the code will continue, calling next & trying to access decoded.id, triggering an error.

jwt.verify(token, process.env.SECRET, function(err, decoded) {
        if (err) {
            return res.status(500).send({
                message: err.message
            })
        }

        req.userId = decoded.id

        next()
})

Upvotes: 3

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