📝 Backend Codebase Issues Report

[Arpitburley11]

1. Project Structure

⚠️ Issue :

• All models, controllers, routes, endpoints, and middleware are defined directly inside index.js.
• This makes the codebase hard to scale, test, and maintain.

✅ Recommendation :

• Code should follow a modular MVC structure:
• /models → Mongoose schemas.
• /controllers → business logic.
• /routes → API endpoints.
• /middlewares → authentication, validation, error handling.
• index.js or server.js should only bootstrap the app and attach routes.

2. Database Connection Handling

⚠️ Issue :

• No proper error handling during MongoDB connection.
• If connection fails, app may crash silently or continue in an inconsistent state.

✅ Recommendation:

• Database connection should be wrapped with try/catch and proper logging.
• Server should not start unless DB is successfully connected.
• Call connectDB() in index.js before app.listen().

3. Multer Image Storage

⚠️ Issue :

• Images uploaded with Multer are stored in local storage without proper configuration.
• No validation of file type or size.
• No fallback if storage directory is missing.

✅ Recommendation :

• Images should be stored securely with validation.
• In production, use Cloud storage (Cloudinary, AWS S3, etc.) instead of local disk.
• Local storage (for dev only) should ensure path exists and sanitize filenames.
• Use upload.single("image") in route.
• For production: switch to Cloudinary/S3 adapter

4. Endpoint Error Handling

⚠️ Issue :

• API endpoints (signup, login, product routes, etc.) do not use try/catch.
• Errors are not passed to a centralized error handler.
• Application may crash or expose raw errors to the client.

✅ Recommendation :

• Each endpoint should be wrapped in try/catch.
• Errors should be forwarded to a central error middleware with proper response formatting.

5. Authentication & Security Issues

⚠️ Issue :

• Passwords are stored in plain text, making them highly vulnerable if the database is leaked.
• Signup accepts invalid or malformed emails (e.g., abc, test@) since no schema-level validation is enforced.
• Cookies/session handling is not secure: missing critical flags like httpOnly, secure, and sameSite, leaving tokens exposed to XSS/CSRF attacks.

✅ Recommendation :

• Passwords should be hashed using a strong algorithm (e.g., bcrypt) before storage.
• Only valid, unique, trimmed email addresses should be allowed.
• Authentication cookies should be signed, secure, and inaccessible to JavaScript to prevent exploitation.

~ Arpit burley