sanitizing-user-inputs
Security: Input Validation and Sanitization
Purpose: Prevent security vulnerabilities by properly validating and sanitizing all user input, preventing XSS, SQL injection, command injection, and other attack vectors.
When to use: Any time you process user input, API requests, URL parameters, form data, file uploads, or any external data source.
Core Security Principles
1. Never Trust User Input
All user input is potentially malicious until proven safe.
This includes:
- Form submissions
- URL query parameters
- Request headers
- Cookies
- File uploads
- WebSocket messages
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