JSON Webトークン:JWTを使用して承認RESTful API

✔ JWTとは

💡 JSON Web Token is an open and standard (RFC 7519) way for you to represent your user’s identity securely during a two-party interaction. Particularly, when two systems exchange data you can use JSON Web Token to identify your user without having to send private credentials on every request.

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<base64-encoded header>.<base64-encoded payload>.<base64-encoded signature>

✔ JWTによるRESTful APIのビルド

npm install --save  express body-parser morgan jsonwebtoken 

1 -インデックス。js

const express = require('express'),
    bodyParser = require('body-parser'), 
    jwt = require('jsonwebtoken'),
    config = require('./configurations/config'),
    cors = require('cors'),
    app = express();

//set secret
app.set('Secret', config.secret);

// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: true }));

// parse application/json
app.use(bodyParser.json());

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});
app.get('/', function (req, res) {
    res.send('App is running on http://localhost:3000/');
});

2 -設定/設定。js

module.exports = {
    secret: "heymynameisminh"
}

node index.js

❗️ Make sure that you are standing in the right directory to run index.js file (following our project structure)

認証システムの設定

app.post('/authenticate', function (req, res) {
    console.log(req.body);
    if (req.body.username !== "techx") res.json({ message: "user not found!" });
    if (req.body.password !== "123") res.json({ message: "please check your password!" });
    const payload = {
        check: true
    }
    let token = jwt.sign(payload, app.get('Secret'), {
        expiresIn: 14000
    });
    res.json({
        message: 'authentication done',
        token: token
    });
});

const ProtectedRoutes = express.Router();
app.use('/api', ProtectedRoutes);

ProtectedRoutes.use((req, res, next) => {
    let token = req.headers['access-token'];
    console.log(token);
    if (!token) res.send({ message: 'No token provided.' });
    jwt.verify(token, app.get('Secret'), (err, decoded) => {
        if (!err) { req.decoded = decoded; next(); }
        return res.json({ message: 'invalid token' });
    })
});

ProtectedRoutes.get('/getAllProducts', (req, res) => {
    let products = [
        {
            id: 1,
            name: "cheese"
        },
        {
            id: 2,
            name: "carottes"
        }
    ]
    res.json(products)
});