👀 Views: 0 💬 Answers: 1 📅 Created: 2025-09-21

javascript node.js express jwt security JavaScript

I just started working with I keep running into Currently developing an application that integrates machine learning models for fraud detection, and I'm tasked with securing API endpoints in my Node.js backend. I've set up JWT authentication for user login, but I need a way to restrict access to particular endpoints based on user roles. Here's what I have so far: ```javascript const express = require('express'); const jwt = require('jsonwebtoken'); const app = express(); const authenticateJWT = (req, res, next) => { const token = req.header('Authorization')?.split(' ')[1]; if (token) { jwt.verify(token, 'your_secret_key', (err, user) => { if (err) { return res.sendStatus(403); } req.user = user; next(); }); } else { res.sendStatus(401); } }; const isAuthorized = (role) => { return (req, res, next) => { if (req.user.role !== role) { return res.sendStatus(403); } next(); }; }; app.post('/api/predict', authenticateJWT, isAuthorized('data-scientist'), (req, res) => { // Model prediction logic here }); app.listen(3000, () => { console.log('Server is running on port 3000.'); }); ``` The above approach seems to work in terms of token validation, but I’ve run into issues while debugging the authorization middleware. Specifically, when users are assigned multiple roles, how can I efficiently check against an array of roles instead of a single one? Should I modify the `isAuthorized` function or implement a different strategy? Additionally, I’m considering using Express middleware for rate limiting to prevent abuse of the prediction endpoint, especially since it could be a target for attacks. Has anyone implemented rate limiting in combination with JWT authentication in a similar scenario? Any recommendations on libraries or strategies would be greatly appreciated. Thanks for taking the time to read this! This issue appeared after updating to Javascript stable. I appreciate any insights!