Node + Express implements simple token authentication

Install jsonwebtoken

npm install jsonwebtoken --save

Add token.js to generate and validate tokens

const jwt = require("jsonwebtoken")
const signkey = 'mes_qdhd_mobile_xhykjyxgs'

exports.setToken = (username) = > {
    return new Promise((resolve, reject) = > {
        // The first parameter received by sing is an object (it can be customized). If the first parameter is JWT malformed, an error is reported
        const token = jwt.sign({
            username
        }, signkey, { expiresIn: '1h'}); resolve(token); })}exports.verToken = (token) = > {
    return new Promise((resolve, reject) = > {
        jwt.verify(token, signkey, (err, result) = > {
        Token.split ('.')[1]; token.split('.')[1]
        // var parts = jwtString.split('.');

        // if (parts.length ! = = 3) {
        // return done(new JsonWebTokenError('jwt malformed'));
        // }
            if (err) {
                console.log(err);
                reject(err)
            } else {
                console.log(result);
                resolve(result)
            }
        })
    })
}
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Add configuration in app.js

const token = require("./token")

app.use(function(req, res, next) = >{
    
    const URL = req.url

    if (URL === '/login') {
    // No verification is required for the login interface
        return next()
    }
    
    // Obtain the token value
    const authorization = req.headers['authorization'];

    if (authorization === "undefined") {
        return res.status(401).send('Unauthorized')}else {
        / / authentication token
        token.verToken(authorization).then((data) = > {
            req.data = data;
            return next();
        }).catch((error) = > {
            return res.status(401).send('Unauthorized'); })}})Copy the code

Set the token value after login

const token = require("./token")

app.use("/login".(req, res) = > {
// Logon logic
    token.setToken(req.body.username).then(token= > {
        res.status(200).send({
            token,
        })
    })
})
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