app.post('/upload', uploadLimiter, async (req, res, next) => try // Multer must handle file first next(); catch (err) res.status(400).json( error: err.message );
// Upload all button this.uploadAllBtn.addEventListener('click', () => this.uploadAll());
Renaming every uploaded file to a random string to prevent path traversal or script execution. Size and Count Limits: Preventing denial-of-service (DoS)
Below is a structured development guide. Replace [YourTechStack] with your actual language/framework (Node.js, Python, Go, Java, .NET).