local ok, err = red:connect(ip, port) if not ok then ngx.log(ngx.ERR, "连接redis失败 : ", err) return nil end local resp, err = red:get(key) if not resp then ngx.log(ngx.ERR, "查询Redis失败: ", err, ", key = " , key) end if resp == ngx.null then resp = nil ngx.log(ngx.ERR, "查询Redis数据为空, key = ", key) end close_redis(red) local pool_max_idle_time = 10000 local pool_size = 100 local ok, err = red:set_keepalive(pool_max_idle_time, pool_size) if not ok then ngx.log(ngx.ERR, "放入redis连接池失败: ", err) end return resp
时间: 2023-12-04 12:03:03 浏览: 42
在代码中添加了将连接放入连接池的操作,这是一个很好的改进。同时,建议在查询失败时进行重试或者异常处理等操作。修改后的代码可以参考如下:
```
local ok, err = red:connect(ip, port)
if not ok then
ngx.log(ngx.ERR, "连接redis失败 : ", err)
return nil
end
local resp, err = red:get(key)
if not resp and err then
ngx.log(ngx.ERR, "查询Redis失败: ", err, ", key = ", key)
-- 进行重试或者异常处理等操作
close_redis(red)
return nil
elseif not resp and not err then
-- 设置默认值或者直接返回空值
resp = ""
ngx.log(ngx.ERR, "查询Redis数据为空, key = ", key)
end
-- 将连接放入连接池
local pool_max_idle_time = 10000
local pool_size = 100
local ok, err = red:set_keepalive(pool_max_idle_time, pool_size)
if not ok then
ngx.log(ngx.ERR, "放入redis连接池失败: ", err)
end
return resp
```
相关问题
local ok, err = red:connect(ip, port) if not ok then ngx.log(ngx.ERR, "连接redis失败 : ", err) return nil end local resp, err = red:get(key) if not resp then ngx.log(ngx.ERR, "查询Redis失败: ", err, ", key = " , key) end if resp == ngx.null then resp = nil ngx.log(ngx.ERR, "查询Redis数据为空, key = ", key) end close_redis(red) return resp
修改后的代码看起来比之前更健壮了,但是 close_redis 函数没有提供,我建议在函数中添加关闭连接的操作。同时,建议对查询失败和查询数据为空的情况进行不同的处理,可以考虑在查询失败时进行重试或者异常处理等操作,而在查询数据为空时,可以直接返回空值或者设置默认值。修改后的代码可以参考如下:
```
local ok, err = red:connect(ip, port)
if not ok then
ngx.log(ngx.ERR, "连接redis失败 : ", err)
return nil
end
local resp, err = red:get(key)
if not resp and err then
ngx.log(ngx.ERR, "查询Redis失败: ", err, ", key = ", key)
-- 进行重试或者异常处理等操作
close_redis(red)
return nil
elseif not resp and not err then
-- 设置默认值或者直接返回空值
resp = ""
ngx.log(ngx.ERR, "查询Redis数据为空, key = ", key)
end
-- 关闭连接
close_redis(red)
return resp
```
lua中使用resty.redis设置某个值的过期时间为第二天0点
可以通过以下步骤实现:
1. 获取当前时间戳和明天0点的时间戳
```lua
local now = ngx.time()
local tomorrow = os.date("%Y-%m-%d 00:00:00", now + 24 * 3600)
local tomorrow_ts = ngx.parse_http_time(tomorrow)
```
2. 使用resty.redis设置某个值的过期时间为第二天0点
```lua
local redis = require "resty.redis"
local red = redis:new()
red:set_timeout(1000)
local ok, err = red:connect("127.0.0.1", 6379)
if not ok then
ngx.log(ngx.ERR, "failed to connect to Redis: ", err)
return
end
local key = "mykey"
local value = "myvalue"
local res, err = red:set(key, value)
if not res then
ngx.log(ngx.ERR, "failed to set value: ", err)
return
end
local res, err = red:expireat(key, tomorrow_ts)
if not res then
ngx.log(ngx.ERR, "failed to set expiration time: ", err)
return
end
red:close()
```
这样就可以将某个值的过期时间设置为第二天0点了。