学习笔记48_Memcache跟用户登录模块结合
public interface ICacheWriter
{
void AddCache(string key,object value, DateTime expDate);
void AddCache(string key,object value);
object GetCache(string key);
T GetCache<T>(string key);
void SetCache(string key,object value,DateTime extDate);
void SetCache(string key,object value);
}
//实现一：
public class HttpRuntimeCacheWritter : ICacheWriter
{
public void AddCache(string key,object value,DataTime expDate)
{
HttpRuntime.Cache.Insert(key,value,null,expDate,TimeSpan.Zero);
}
public void AddCache(string key,object value)
{
HttpRuntime.Cache.Insert(key,value);
}
public object GetCache(string key)
{
HttpRuntime.Cache[Key];
}
public T GetCache<T> (string key )
{
return (T)HttpRuntime.cache[Key];
}
public void SetCache(string key,object value,DateTime extDate)
{
HttpRuntime.Cache.Remove(key);
AddCache(key,value,extDate);
}
public void SetCache(string key,object value)
{
HttpRuntime.Cache.Remove(key);
AddCache(key,value);
}
}
//实现二：
可以在Web.config中，配置可以连接那些服务器：
//
<configuration>
<appSettings>
<add key= "MemcachedServerList" value="192.168.1.100:11211,192.168.1.118:11211"/>
</appSettings>
</configuration>
//
public class MemCacheWritter : ICacheWriter
{
private MemCachedClient memcachedClient;
//
public MemcacheWritter()
{
// 分布Memcachedf服务IP 端口
//string[] servers = {"192.168.1.100:11211","192.168.1.118:11211"};//意思是可以将数据放到两台电脑当中
string[] servers = System.configuration.ConfigurationManager.AppSettings["MemcachedServerList"].Split(",")
//初始化池
SockIOPool pool = SockIOPool.GetInstance();
pool.SetServers(servers);
pool.InitConnections = 3;
pool.MinConnections = 3;
pool.MaxConnections = 5;
pool.SocketConnectTimeout = 1000;
pool.SocketTimeout = 3000;
pool.MaintenancelSleep = 30;
pool.Failover = true;
pool.Nagle = false;
pool.Initialize();
//客户端实例化
memcachedClient = new MemcacheClient();
mc.EnableCompression = false;
mc.Add("keyddd","sssssssssss"); //进行哈希算法，以决定存到哪台机器上
}
//
public void AddCache(string key,object value,DataTime expDate)
{
//注意，传入的value是要有标记为[Serialzable]的
memcachedClient.Add(key,value,expDate);
}
public void AddCache(string key,object value)
{
memcachedClient.Add(key,value);
}
public object GetCache(string key)
{
memcacheClient.Get(key);
}
public T GetCache<T> (string key )
{
return (T)memcacheClient.Get(key);
}
public void SetCache(string key,object value,DateTime extDate)
{
memcacheClient.Set(key,value,extDate);
}
public void SetCache(string key,object value)
{
memcahce.set(key,value);
}
}
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//此类事用来提供ICacheWriter具体类以及其方法
publc class CacheHelper
{
// 这里可以使用Spring 来注入
public static ICacheWritter CacheWritter {get;set;}
//静态构造函数只会执行一次
static CacheHelper()
{
//在String.core.dll中
Spring.Context.IApplicationContext ctx = ContextRegistry.GetContext();
//此处不是为了获得CacheHelper对象，而是为了在实例化对象的时候，顺便
根据<property name="CacheWriter" ref="CacheWriter"/>来设置CacheWriter
ctx.GetObject("CacheHelper");
//也能
//CacheWriter = ctx.GetObject("CacheWriter") as ICacheWritter;
}
//
public statci void AddCache(string key,object value,DataTime expDate)
{
//往缓存写：单机，分布式，修改一下配置，就能切换
}
public static void AddCache(string key,object value)
{
}
public static object GetCache(string key)
{
}
public void SetCache(string key,object value,DateTime extDate)
{
....
}
public void SetCache(string key,object value)
{
.....
}
}
//Spring注入，在common.xml
<objects xmlns="...">
<!--使用单机模式--->
<!--<objcet name="CacheWriter" type = "xxxx.xxx.HttpRuntimeCacheWritter(类全名),XXX.XXX.XXX(程序集名)" singleton="false"></object>-->
<!--使用memcahced分布式缓存--->
<objcet name="CacheWriter(对应下面的ref)" type = "xxxx.xxx.MemcahcedWritter(类全名),XXX.XXX.XXX(程序集 名)" singleton="false"></object>
<!--对CacheHelper进行属性值注入，此处CacheWriter就是CacheHelper的属性-->
<object name="CacheHelper" type=xxxx.xxx.CacheHelper,xxx.xxx>
<property name="CacheWriter" ref="CacheWriter(对应上面的name)"/>
</object>
</objects>
//Web.config中
<configuration>
<!--Spring.Net配置节点-->
<Spring>
<context>
<resoruce url="file://~/config/common.xml"/> <!--放到第一行，是因为后边的配置文件要用到它-->
<resoruce url="file://~/config/其他配置文件.xml"/>
</context>
</Spring>
</configuration>
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// 登录控制器
public AciontResult ProcessLogin()//此处可以定义一个ViewMode来接收，单是ViewMode的属性名，应该和html控件的name一致
{
//处理验证码
string strCode= Request["控件name"];
string sessionCode = Session["VCode"] as string;
Session["VCode"] = null;//**验证码取一次就应该让其为null
if(string.IsNullOrEmpty|| sessionCode!=null )
{
return Content("验证码错误");//返回这串，给前台在html标签中显示
}
//处理用户名密码
string uid = Request["LoginCode"];
string pwd = Request["LoginPwd"];
//var userinfo = Service.GetEntities(u=>u.uid==uid&&u.pwd==pwd).FirstOrDefault();
**不用EF也行，反正要获取到实例
//if(userinfo==null)
//{
//return Content("密码错误");//返回这串，给前台在html标签中显示
//}
//session["LoginUser"] = userinfo;//是使用session来记录会话状态
改为：
var guid = Guid.NewGuid();
CacheHelper .AddCache(guid ,userinfo,DataTime.Now.AddMinutes(20));//20分钟过期
//
Respose.Cookie.add(new cookie("UserLoginId",Guid));
//如果正确那么跳转到首页
return Content("ok");//后台不要直接使得页面重定向，为了接口通用性，以及前台逻辑问题
//上边是返回 Content("")，这里应该也是返回Content("")
}
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public class BaseController:Controller//本来
{
protected bool needCheck=true;
protected UserInfo currentUser{get;set;}
protect override void OnActionExecuting(ActionExecutingContext filterContext)
{
//在当前的控制器里面所有的方法执行之前，都先执行此代码
base.OnActionExecuting(filterContext);
//跟上面的LoginCheckFilterAttribute的代码
if(needCheck==false) return;
//检验用户是否登录
currentUser = filterContext.HttpContext.Session["LoginUser"] as UserInfo;
//这里使用
string userGuid = Request.Cookies["UserLoginId"].value;
currentUser = CacheHelper.Get("userGuid") as UserInfo;
if( currentUser ==null)
{
filterContext.HttpContext.Respone.Redirect("/UserLogin/Login");
}
else
{
//过期时间更新
CacheHelper.Set("LoginUser",currentUser,DataTime.Now.AddMinutes(20));
}
}
}
