fix: Add input validation and proper HTTP status codes to Flask API e…

[aparnatonni]

Add input validation and proper HTTP status codes to all API endpoints

• Validate empty/null command inputs across 10 endpoints
• Return proper status codes: 400 for bad input, 500 for errors
• Wrap GDB execution in try/except blocks
• Return structured JSON error responses

Fixes issue #144

[Uday9909]

Hey, thanks for the PR! I've reviewed the changes, but we can't merge this as-is. It adds superficial validation but still leaves critical security vulnerabilities open.

Path Traversal (main.py:97-112): name is still used directly after a .strip(). This needs proper sanitization and must be restricted to a fixed output directory.

Command Injection (main.py:58-74 & 164-169): Both command and location are just checked for empty strings before execution/concatenation. This leaves injection vectors wide open. We need a strict allowlist or parser here.

We need to tackle this using a centralized validation and allowlist approach rather than duplicating string checks.

@Shubh942 — I recommend closing this PR for now until we establish a proper shared validation handler!