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51 lines (40 loc) · 1.49 KB
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import time
from typing import Tuple
from redis import Redis
from .config import RATE_LIMIT_SETTINGS
class RateLimiter:
def __init__(
self,
redis_host: str = RATE_LIMIT_SETTINGS.redis_host,
redis_port: str = RATE_LIMIT_SETTINGS.redis_port,
redis_password: str = RATE_LIMIT_SETTINGS.redis_password,
requests_per_minute: int = RATE_LIMIT_SETTINGS.requests_per_minute,
):
self.redis = Redis(
host=redis_host,
port=int(redis_port),
password=redis_password,
decode_responses=True,
)
self.window = 60
self.max_requests = requests_per_minute
async def check_rate_limit(self, api_key_id: str) -> Tuple[bool, int, int]:
"""
Check if request is within rate limits.
Args:
api_key_id: The API key identifier to check
Returns:
Tuple of (is_allowed, remaining_requests, reset_time)
"""
now = time.time()
window_start = now - self.window
key = f"ratelimit:{api_key_id}:1min"
pipe = self.redis.pipeline()
pipe.zremrangebyscore(key, 0, window_start)
pipe.zadd(key, {str(now): now})
pipe.zcount(key, window_start, now)
pipe.expire(key, self.window)
_, _, request_count, _ = pipe.execute()
remaining = max(0, self.max_requests - request_count)
reset_time = int(now + self.window)
return request_count <= self.max_requests, remaining, reset_time