Redis Lua 滑动时间窗口限流实践

限流脚本（window=60000ms，limit=100）：local key = KEYS[1] local now = tonumber(ARGV[1]) local window = tonumber(ARGV[2]) local limit = tonumber(ARGV[3]) redis.call('ZADD', key, now, now) redis.call('ZREMRANGEBYSCORE', key, 0, now - window) local count = tonumber(redis.call('ZCARD', key)) redis.call('EXPIRE', key, math.floor(window/1000)) if count <= limit then return {1, limit - count} else return {0, 0} end 执行示例：EVALSHA <sha> 1 rate:uid:123 1690000000000 60000 100