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rate_limiter_middleware.py
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rate_limiter_middleware.py
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from app.config.redis_config import get_redis_pool
from fastapi.responses import JSONResponse
from starlette.middleware.base import BaseHTTPMiddleware
from starlette.requests import Request
MAX_REQUESTS = 10
TIME_WINDOW = 60
class RateLimitMiddleware(BaseHTTPMiddleware):
async def dispatch(self, request: Request, call_next):
client_ip = request.client.host
redis = await get_redis_pool()
try:
request_count = await redis.get(client_ip)
request_count = int(request_count) if request_count else 0
if request_count >= MAX_REQUESTS:
ttl = await redis.ttl(client_ip)
detail = {"error": "Too Many Requests", "message": f"Rate limit exceeded. Try again in {ttl} seconds."}
return JSONResponse(status_code=429, content=detail)
pipe = redis.pipeline()
pipe.incr(client_ip)
pipe.expire(client_ip, TIME_WINDOW)
await pipe.execute()
finally:
print("Finally Block in Rate Limit exceeded")
response = await call_next(request)
return response