redis限流Lua脚本

local rate = tonumber(ARGV[1]);
local rateInterval = tonumber(ARGV[2]);
local limitResult = 0;
local ttlResult = 0;
local currValue = redis.call('incr', KEYS[1]);
if (currValue == 1) then
    redis.call('expire', KEYS[1], rateInterval);
    limitResult = 0;
else
    if (currValue > rate) then
        limitResult = 1;
        ttlResult = redis.call('ttl', KEYS[1]);
    end
end
return { limitResult, ttlResult }