Add sliding-window in-memory RateLimiter service (Arc<Mutex<HashMap>>) with per-IP and per-user-id limits on all public endpoint classes: - POST /api/v1/join: 5/min per IP - GET /api/v1/feed: configurable per IP (feed_rate_per_min, default 60) - POST /api/v1/upload: configurable per user (upload_rate_per_hour, default 10) - GET /api/v1/export/zip|html: configurable per IP (export_rate_per_day, default 3) Limits are hot-reloadable via the config table. All 429 responses use German error messages. Client IP is read from X-Forwarded-For (Caddy). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
1.5 KiB
1.5 KiB