Phillip Tarrant 167ab803a6 Phase 2 Step 7: Implement Error Handling & Logging ...

Comprehensive error handling and logging system with production-ready
features for monitoring, debugging, and user experience.

Enhanced Logging System:
- Implemented RotatingFileHandler (10MB per file, 10 backups, 100MB total)
- Separate error log file for ERROR level messages with detailed tracebacks
- Structured logging with request IDs, timestamps, and module names
- RequestIDLogFilter for automatic request context injection
- Console logging in debug mode with simplified format

Request/Response Middleware:
- Request ID generation using UUID (8-character prefix for readability)
- Request timing with millisecond precision
- User authentication context in all logs
- Response duration tracking and headers (X-Request-ID, X-Request-Duration-Ms)
- Security headers: X-Content-Type-Options, X-Frame-Options, X-XSS-Protection

Database Error Handling:
- Enabled SQLite WAL mode for better concurrency with background jobs
- Busy timeout configuration (15 seconds) for lock handling
- Automatic rollback on request exceptions via teardown handler
- Dedicated SQLAlchemyError handler with explicit rollback
- Connection pooling with pre-ping validation

Comprehensive Error Handlers:
- Content negotiation: JSON responses for API, HTML for web requests
- Error handlers for 400, 401, 403, 404, 405, 500
- Database rollback in all error handlers
- Full exception logging with traceback for debugging

Custom Error Templates:
- Created web/templates/errors/ directory with 6 templates
- Dark theme matching application design (slate colors)
- User-friendly error messages with navigation
- Templates: 400, 401, 403, 404, 405, 500

Testing:
- Comprehensive test suite (320+ lines) in tests/test_error_handling.py
- Tests for JSON vs HTML error responses
- Request ID and duration header verification
- Security header validation
- Log rotation configuration tests
- Structured logging tests

Bug Fix:
- Fixed pagination bug in scans API endpoint
- Changed paginated_result.total_pages to paginated_result.pages
- Resolves AttributeError when listing scans

Files Added:
- tests/test_error_handling.py
- web/templates/errors/400.html
- web/templates/errors/401.html
- web/templates/errors/403.html
- web/templates/errors/404.html
- web/templates/errors/405.html
- web/templates/errors/500.html

Files Modified:
- web/app.py (logging, error handlers, request handlers, database config)
- web/api/scans.py (pagination bug fix)
- docs/ai/PHASE2.md (mark Step 7 complete, update progress to 86%)

Phase 2 Progress: 12/14 days complete (86%)

2025-11-14 12:19:07 -06:00

9.4 KiB

Raw Blame History

View Raw