public string Get(string key)
{
//从Redis取数据
var result = redisHelper.Get(key);
if (result == null)
{
try
{
//获取锁
if (Monitor.TryEnter(LockObj))
{
//从数据库取数据
result = "Select * From DbTable";
if (result != null)
{
//写入Redis缓存
redisHelper.Insert(key, result);
}
//释放锁
Monitor.Exit(LockObj);
}
else
{
Thread.Sleep(100);
result = redisHelper.Get(key);
}
}
finally
{
if (Monitor.IsEntered(LockObj))
{
Monitor.Exit(LockObj);
}
}
}
return(result.ToString());
}
public IActionResult Index()
{
var cacheKey = "TheTime";
var existingTime = _redis.Get(cacheKey);
if (!string.IsNullOrEmpty(existingTime))
{
ViewBag.Message = "Fetched from cache : " + existingTime;
}
else
{
existingTime = DateTime.Now.ToString();
_redis.Set(cacheKey, existingTime, expirationInSeconds: 30);
ViewBag.Message = "Added to cache : " + existingTime;
}
return(View());
}
public override void OnActionExecuting(HttpActionContext filterContext)
{
string token = "";
var request = ((HttpContextBase)filterContext.Request.Properties["MS_HttpContext"]).Request;
token = request.Headers["token"];
if (string.IsNullOrEmpty(token))
{
token = request.Params["token"];
}
if (string.IsNullOrEmpty(token))
{
filterContext.Response = filterContext.Request.CreateResponse(OutPutData.NewOutPutData("请授权", false));
return;
}
var JwtDictionary = JwtHelper.ValidateJwtToken(token);
if (JwtDictionary == null)
{
filterContext.Response = filterContext.Request.CreateResponse(OutPutData.NewOutPutData("非法授权", false));
return;
}
if (string.IsNullOrEmpty(JwtDictionary["UserName"]) || string.IsNullOrEmpty(JwtDictionary["RandomNum"]))
{
filterContext.Response = filterContext.Request.CreateResponse(OutPutData.NewOutPutData("非法授权", false));
return;
}
if (!redisHelper.Exist(ConstData.UserLoginJwt + JwtDictionary["UserName"]))
{
filterContext.Response = filterContext.Request.CreateResponse(OutPutData.NewOutPutData("请重新登陆", false));
return;
}
var RedisJwtDictionary = JwtHelper.ValidateJwtToken(redisHelper.Get(ConstData.UserLoginJwt + JwtDictionary["UserName"]));
if (RedisJwtDictionary["RandomNum"] != JwtDictionary["RandomNum"])
{
filterContext.Response = filterContext.Request.CreateResponse(OutPutData.NewOutPutData("您的账号已在其他地方登陆", false));
return;
}
base.OnActionExecuting(filterContext);
}
