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FabledScribe/src/scribe/rate_limit.py
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bvandeusen b255a0f90e
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refactor: rename package fabledassistant -> scribe (code-only)
Renames src/fabledassistant -> src/scribe and all imports, plus the
default DB name and DB user/password (fabled -> scribe) in config +
compose. 952 refs / 154 files. Reverses the old 'internal name stays
fabledassistant' convention.

Code-only: live databases are still physically named 'fabledassistant'.
Deployed environments must set POSTGRES_DB / POSTGRES_USER (or rename the
DB) since the defaults now resolve to 'scribe'. Repo (FabledScribe), git
host (fabledsword), MCP (fabled-git) and the image name (fabledscribe)
are intentionally unchanged.

ruff check src/ clean locally; CI (typecheck + pytest) is the gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-03 15:48:35 -04:00

28 lines
971 B
Python

"""In-process sliding-window rate limiter.
IMPORTANT — deployment note:
Rate limit counters are stored in memory and are lost on process restart.
When deployed behind a reverse proxy (nginx, Caddy, Traefik) you MUST set
TRUST_PROXY_HEADERS=true so that the real client IP is used as the bucket key
rather than the proxy's IP (which would cause all users to share one bucket).
"""
import asyncio
import time
from collections import defaultdict
_buckets: dict[str, list[float]] = defaultdict(list)
_lock = asyncio.Lock()
async def is_rate_limited(key: str, max_requests: int, window_seconds: int) -> bool:
"""Returns True if request should be blocked (limit exceeded)."""
async with _lock:
now = time.monotonic()
cutoff = now - window_seconds
_buckets[key] = [t for t in _buckets[key] if t > cutoff]
if len(_buckets[key]) >= max_requests:
return True
_buckets[key].append(now)
return False