Implement rate limiting
Protect APIs from abuse
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Implement rate limiting middleware for a [Express/Fastify/Django] API using a sliding window algorithm with Redis. Allow [X] requests per [time window] per IP. Return proper 429 headers (Retry-After, X-RateLimit-*) and whitelist internal service IPs.
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Utilisez un script Lua Redis pour vérifier et décrémenter le compteur atomiquement. Sinon, en forte concurrence, la fenêtre glissante peut laisser passer plus de requêtes que prévu. Pour les IP de la liste blanche, sautez totalement le middleware via une condition en début de pipeline.
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