1、这两天研究Redis搞分布式session问题,网上找的资料都是用ServiceStack.Redis来实现的,但是在做性能测试的时候发现最新的v4版本有限制每小时候最多请求6000次,因为官网开始商业化要收费了,好坑爹的说,还好我前期弄了个性能测试列子,不然上线以后出问题那就麻烦了。后面找了个NServiceKit.Redis(好像就是ServiceStack.Redis的v3版本)来替代v4的收费版。
2、解决方案是 Redis+cookie方式实现记录用户登录状态
cookie:存放用户的ID,这个ID是经过加密的,并且后台可以通过密钥解密。
Redis:key/value 方式存储,key存放比如:user_1。 value存放用户实体对象。
3、先安装一个Redis,windows的版本在本地进行测试,后期上线更换linux系统的Redis替换一下ip就可以了。
4、添加一个Session管理类
public class SessionHelper
{
private const int secondsTimeOut = 60 * 20; //默认过期时间20分钟 单位秒
public RedisHelper Redis = new RedisHelper(false);
public LoginUserInfo this[string key]
{
get
{
string webCookie = WebHelper.GetCookie(key);
if (webCookie == "")
{
return null;
}
key = key + "_" + SecureHelper.AESDecrypt(webCookie);
//距离过期时间还有多少秒
long l = Redis.TTL(key);
if (l >= 0)
{
Redis.Expire(key, secondsTimeOut);
}
return Redis.Get<LoginUserInfo>(key);
}
set
{
SetSession(key, value);
}
}
public void SetSession(string key, LoginUserInfo value)
{
if (string.IsNullOrWhiteSpace(key))
{
throw new Exception("Key is Null or Epmty");
}
WebHelper.SetCookie(key, SecureHelper.AESEncrypt(value.ID.ToString()));
key = key + "_" + value.ID;
Redis.Set<LoginUserInfo>(key, value, secondsTimeOut);
}
/// <summary>
/// 移除Session
/// </summary>
/// <param></param>
/// <returns></returns>
public bool Remove(string key)
{
var rs = Redis.Remove(key + "_" + SecureHelper.AESDecrypt(WebHelper.GetCookie(key)));
WebHelper.DeleteCookie(key);
return rs;
}
}
5、Redis操作类
public class RedisHelper : IDisposable
{
private RedisClient Redis = new RedisClient("127.0.0.1", 6379);
//缓存池
PooledRedisClientManager prcm = new PooledRedisClientManager();
//默认缓存过期时间单位秒
public int secondsTimeOut = 20 * 60;
/// <summary>
/// 缓冲池
/// </summary>
/// <param></param>
/// <param></param>
/// <returns></returns>
public static PooledRedisClientManager CreateManager(string[] readWriteHosts, string[] readOnlyHosts)
{
return new PooledRedisClientManager(readWriteHosts, readOnlyHosts,
new RedisClientManagerConfig
{
MaxWritePoolSize = readWriteHosts.Length * 5,
MaxReadPoolSize = readOnlyHosts.Length * 5,
AutoStart = true,
});
}
/// <summary>
/// 构造函数
/// </summary>
/// <param>是否开启缓冲池</param>
public RedisHelper(bool OpenPooledRedis = false)
{