asp.net mvc 用Redis实现分布式集群共享Session

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 name="key"></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 name="readWriteHosts"></param>

/// <param name="readOnlyHosts"></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 name="OpenPooledRedis">是否开启缓冲池</param>

public RedisHelper(bool OpenPooledRedis = false)

{

if (OpenPooledRedis)

{

prcm = CreateManager(new string[] { "127.0.0.1:6379" }, new string[] { "127.0.0.1:6379" });

Redis = prcm.GetClient() as RedisClient;

}

}

/// <summary>

/// 距离过期时间还有多少秒

/// </summary>

/// <param name="key"></param>

/// <returns></returns>

public long TTL(string key)

{

return Redis.Ttl(key);

}

/// <summary>

/// 设置过期时间

/// </summary>

/// <param name="key"></param>

/// <param name="timeout"></param>

public void Expire(string key,int timeout = 0)

{

if (timeout >= 0)

{

if (timeout > 0)

{

secondsTimeOut = timeout;

}

Redis.Expire(key, secondsTimeOut);

}

}

#region Key/Value存储

/// <summary>

/// 设置缓存

/// </summary>

/// <typeparam name="T"></typeparam>

/// <param name="key">缓存建</param>

/// <param name="t">缓存值</param>

/// <param name="timeout">过期时间，单位秒,-1：不过期，0：默认过期时间</param>

/// <returns></returns>

public bool Set<T>(string key, T t, int timeout = 0)

{

Redis.Set<T>(key, t);

if (timeout >= 0)

{

if (timeout > 0)

{

secondsTimeOut = timeout;

}

Redis.Expire(key, secondsTimeOut);

}

return true;

}

/// <summary>

/// 获取

/// </summary>

/// <typeparam name="T"></typeparam>

/// <param name="key"></param>

/// <returns></returns>

public T Get<T>(string key)

{

return Redis.Get<T>(key);

}

/// <summary>

/// 删除

/// </summary>

/// <param name="key"></param>

/// <returns></returns>

public bool Remove(string key)

{

return Redis.Remove(key);

}

#endregion

//释放资源

public void Dispose()

{

if (Redis != null)

{

Redis.Dispose();

Redis = null;

}

GC.Collect();

}

}

Ubuntu 12.10下安装Redis（图文详解）+ Jedis连接Redis http://www.codesec.net/Linux/2013-06/85816.htm
Redis系列-安装部署维护篇 http://www.codesec.net/Linux/2012-12/75627.htm
CentOS 6.3安装Redis http://www.codesec.net/Linux/2012-12/75314.htm
Redis安装部署学习笔记 http://www.codesec.net/Linux/2014-07/104306.htm
Redis配置文件redis.conf 详解 http://www.codesec.net/Linux/2013-11/92524.htm Redis 的详细介绍：请点这里

Redis 的下载地址：请点这里

本文地址：http://www.codesec.net/Linux/2015-07/120105.htm