Files
ContentGrabbingJi/ContentGrabbingJi-CacheStore-redis/src/main/lua/RemoveElementByIndex.lua
T
LamGC f1e76092a0 [Fix] CacheStore-Redis 修复 RemoveElementByIndex 脚本中对无效项判断的错误;
[Fix] RemoveElementByIndex.lua 修复范围溢出, 不存在键检查失效的问题;
2021-01-11 16:24:55 +08:00

32 lines
897 B
Lua

local function getRandom(n)
local t = {
"0","1","2","3","4","5","6","7","8","9",
"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z",
}
local s = ""
for _ = 1, n do
s = s .. t[math.random(#t)]
end;
return s
end
local key = tostring(KEYS[1])
local index = tonumber(ARGV[1])
if (key == nil) or (index == nil) or (redis.call("exists", key) == false) then
return 0
end
local listLength = redis.call("llen", key)
if listLength == 0 then
return 0
end
if (index < 0) or (index >= listLength) or redis.call("lIndex", key, index) == nil then
return 0
else
local flag = getRandom(24)
redis.call("lSet", key, index, flag);
return redis.call("lRem", key, 0, flag);
end