Mikkel Georgsen
741434d362
Tasks completed: 2/2 - Configure rate limiting and CSRF protection - Apply security middleware stack and database health check SUMMARY: .planning/phases/01-core-infrastructure-security/01-03-SUMMARY.md
125 lines
4.8 KiB
Markdown
125 lines
4.8 KiB
Markdown
---
|
|
phase: 01-core-infrastructure-security
|
|
plan: 03
|
|
subsystem: security
|
|
tags: [slowapi, fastapi-csrf-protect, rate-limiting, cors, security-headers, middleware]
|
|
|
|
# Dependency graph
|
|
requires:
|
|
- phase: 01-01
|
|
provides: FastAPI application structure, pydantic-settings configuration
|
|
- phase: 01-02
|
|
provides: PostgreSQL database, async session factory, get_db dependency
|
|
provides:
|
|
- Rate limiting at 100 requests/minute per IP
|
|
- CSRF protection with secure cookie configuration
|
|
- Security headers middleware (HSTS, X-Frame-Options, X-XSS-Protection)
|
|
- TrustedHostMiddleware for Host header validation
|
|
- CORS configuration with credential support
|
|
- Database health check endpoint at /api/v1/health/db
|
|
affects: [01-04, 01-05, 02, 03]
|
|
|
|
# Tech tracking
|
|
tech-stack:
|
|
added: [slowapi, fastapi-csrf-protect]
|
|
patterns: [security-middleware-stack, rate-limit-exempt-decorator, dependency-injection-for-csrf]
|
|
|
|
key-files:
|
|
created:
|
|
- backend/app/core/security.py
|
|
- backend/app/api/deps.py
|
|
modified:
|
|
- backend/app/main.py
|
|
- backend/app/api/v1/endpoints/health.py
|
|
|
|
key-decisions:
|
|
- "Security headers applied via custom middleware (Starlette @app.middleware pattern)"
|
|
- "Rate limiting uses in-memory storage for development, Redis URL configurable for production"
|
|
- "Health endpoints exempt from rate limiting via @limiter.exempt decorator"
|
|
- "CSRF validation available as optional dependency injection pattern"
|
|
|
|
patterns-established:
|
|
- "Middleware ordering: TrustedHost (outermost) -> CORS -> Rate limiting -> Security headers (innermost)"
|
|
- "deps.py centralizes FastAPI dependencies with re-exports for cleaner imports"
|
|
- "Database health check with SELECT 1 query pattern"
|
|
|
|
# Metrics
|
|
duration: 3min
|
|
completed: 2026-01-25
|
|
---
|
|
|
|
# Phase 01 Plan 03: Security Middleware Stack Summary
|
|
|
|
**FastAPI security middleware with 100/min rate limiting, CSRF protection, trusted host validation, CORS, and security headers (HSTS, X-Frame-Options, X-XSS-Protection, Referrer-Policy)**
|
|
|
|
## Performance
|
|
|
|
- **Duration:** 3 min
|
|
- **Started:** 2026-01-25T20:17:05Z
|
|
- **Completed:** 2026-01-25T20:20:07Z
|
|
- **Tasks:** 2
|
|
- **Files modified:** 4 (plus 1 migration file linting fix)
|
|
|
|
## Accomplishments
|
|
|
|
- Rate limiting configured at 100 requests/minute using slowapi with in-memory storage
|
|
- CSRF protection configured with secure cookie settings (httponly, samesite=lax, secure=true)
|
|
- Security headers middleware adds HSTS, X-Content-Type-Options, X-Frame-Options, X-XSS-Protection, Referrer-Policy
|
|
- TrustedHostMiddleware rejects requests with invalid Host headers (returns 400)
|
|
- Database health check endpoint verifies PostgreSQL connectivity
|
|
|
|
## Task Commits
|
|
|
|
Each task was committed atomically:
|
|
|
|
1. **Task 1: Configure rate limiting and CSRF protection** - `81486fc` (feat)
|
|
2. **Task 2: Apply security middleware and update health endpoint** - `0d1a008` (feat)
|
|
|
|
## Files Created/Modified
|
|
|
|
- `backend/app/core/security.py` - Rate limiter and CSRF settings configuration
|
|
- `backend/app/api/deps.py` - Dependency injection utilities with get_db re-export and CSRF validation
|
|
- `backend/app/main.py` - Security middleware stack applied in correct order
|
|
- `backend/app/api/v1/endpoints/health.py` - Database health check endpoint with rate limit exemption
|
|
|
|
## Decisions Made
|
|
|
|
- Used Starlette's @app.middleware("http") for security headers instead of separate middleware class (simpler for static headers)
|
|
- Health endpoints marked @limiter.exempt to avoid rate limiting health checks from monitoring systems
|
|
- CSRF validation is optional dependency injection pattern (validate_csrf) rather than middleware, allowing per-endpoint control
|
|
- Used get_db re-export pattern in deps.py for cleaner import paths in endpoints
|
|
|
|
## Deviations from Plan
|
|
|
|
### Auto-fixed Issues
|
|
|
|
**1. [Rule 3 - Blocking] Fixed ruff linting errors in migration file**
|
|
- **Found during:** Task 2 (ruff check backend/)
|
|
- **Issue:** Pre-existing migration file had trailing whitespace, long lines, and old Union syntax
|
|
- **Fix:** Reformatted file to comply with ruff rules (line length, modern type hints)
|
|
- **Files modified:** backend/alembic/versions/de1460a760b0_create_build_table.py
|
|
- **Verification:** `ruff check backend/` passes with no errors
|
|
- **Committed in:** 0d1a008 (Task 2 commit)
|
|
|
|
---
|
|
|
|
**Total deviations:** 1 auto-fixed (1 blocking)
|
|
**Impact on plan:** Linting fix was necessary for verification to pass. No scope creep.
|
|
|
|
## Issues Encountered
|
|
|
|
None - plan executed as expected.
|
|
|
|
## User Setup Required
|
|
|
|
None - no external service configuration required. Rate limiting uses in-memory storage by default.
|
|
|
|
## Next Phase Readiness
|
|
|
|
- Security middleware stack complete and verified
|
|
- Ready for 01-04-PLAN.md (Caddy reverse proxy and automatic HTTPS)
|
|
- CSRF protection configured but not enforced on endpoints yet (ready for form submission protection when needed)
|
|
|
|
---
|
|
*Phase: 01-core-infrastructure-security*
|
|
*Completed: 2026-01-25*
|