为什么令牌上有JWT(JSON Web令牌)前缀?回复:JsonWebTokenError:无效的令牌

时间:2019-10-25 21:56:28

标签: node.js jwt token

花了很多时间解决这个JWT错误,最后发现了导致它的原因,但是我不明白为什么。

我的user.js文件(模型和路线)在用户登录时生成令牌。

router.post('/login', async (req, res) => {
    try {
        console.log(req.body.email);
        console.log(req.body.password);
        const { email, password } = req.body;
        const user = await User.findByCredentials(email, password)
        if (!user) {
            return res.status(401).send({error: 'Login failed! Check authentication credentials'})
        }
        const token = await user.generateAuthToken()
        res.send({ user, token })
    } catch (error) {
        console.log(error)
        res.status(400).send(error)
    }
})
userSchema.methods.generateAuthToken = async function() {
    // Generate an auth token for the user
    const user = this
    const token = jwt.sign({
            email: user.email,
            _id: user._id
        }, 
        'badabaloozagoodoo',
        { 
            expiresIn:'1h' 
        }
    )
    console.log('Generating token')
    console.log(token)
    user.tokens = user.tokens.concat({token})
    await user.save()
    return token
}

它输出这样的令牌:

  

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImpzbWl0aEBnbWFpbC5jb20iLCJfaWQiOiI1ZGIyNGRmYzc5NzUyZTYxOGI3OTk1NDYiLCJpYXQiOjE1NzIwMzkxOTcsImV4cCI6MTU3MjA0Mjc5N30.ctdg8vkne1gvD3-Lo6j-T5BQEMVKBoKBsDGddtuQBUE

然后,在随后的对另一条路由的调用中,以下中间件检查令牌以确保用户被授权。它不断抛出 JsonWebTokenError:无效令牌错误,我不明白为什么。然后,我将令牌从请求标头打印到字符串中,并注意到出于某种原因它具有 JWT 前缀。

  

JWTeyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImpzbWl0aEBnbWFpbC5jb20iLCJfaWQiOiI1ZGIyNGRmYzc5NzUyZTYxOGI3OTk1NDYiLCJpYXQiOjE1NzIwMzkxOTcsImV4cCI6MTU3MjA0Mjc5N30.ctdg8vkne1gvD3-Lo6j-T5BQEMVKBoKBsDGddtuQBUE

因此,我添加了删除JWT前缀的编码,现在代码运行无任何错误。有人可以帮助我了解发生了什么事吗?

const jwt = require('jsonwebtoken')
const User = require('../../models/user')

const checkAuth = async(req, res, next) => {
    console.log("Check auth")
    try {
        console.log(req.header('Authorization'))
        var token = req.header('Authorization').replace('Bearer ', '')
        token = token.replace('JWT', '')
        console.log(token)
        const data = jwt.verify(token, 'badabaloozagoodoo') 
        const user = await User.findOne({ _id: data._id, 'tokens.token': token })
        if (!user) {
            throw new Error('User not found')
        }
        req.user = user
        req.token = token
        next()
    } catch (error) {
        console.log('Auth failed')
        console.log(error)
        res.status(401).send({ error: 'Not authorized to access this resource.' })
    }
}
module.exports = checkAuth

1 个答案:

答案 0 :(得分:0)

好吧。我发现了我的错误。我已经设置了一个拦截器来验证令牌,并且正在添加“ JWT”前缀

req = req.clone({headers:req.headers.set('Authorization', 'JWT'+token)}); //passing request 
return next.handle(req)