redis 限流

1代表通过，0代表不通过

• lua脚本一

local key = KEYS[1]
local limit = tonumber(ARGV[1])
local timeout = tonumber(ARGV[2])

local current = redis.call('get', key)
if not current or tonumber(current) < limit then
    current = redis.call('incr', key)
    if tonumber(current) == 1 then
        redis.call('expire', key, timeout)
    end
    return 1
end

return 0

•  lua脚本二

local key = KEYS[1]
local limit = tonumber(ARGV[1])
local timeout = tonumber(ARGV[2])

local current = redis.call('incr', key)
if tonumber(current) == 1 then
    redis.call('expire', key, timeout)
end

if tonumber(current) > limit then
    return 0
end

return 1