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;      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);                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);    }                        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);        PooledRedisClientManager prcm = new PooledRedisClientManager();        public int secondsTimeOut = 20 * 60;                            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,        });     }                    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;      }    }                        public long TTL(string key)    {      return Redis.Ttl(key);    }                        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                                    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;    }                            public T Get<T>(string key)    {      return Redis.Get<T>(key);    }                        public bool Remove(string key)    {      return Redis.Remove(key);    }    #endregion        public void Dispose()    {      if (Redis != null)      {        Redis.Dispose();        Redis = null;      }      GC.Collect();    }  }