我有一个全局NoCache过滤器,如下所示:https://stackoverflow.com/a/12964123/78739
此全局无缓存筛选器适用于所有操作。我有一个案例,我需要使用OutputCacheAttribute允许缓存一个特定的操作。我在NoCache过滤器中思考,我会检查刚刚执行的操作是否具有OutputCacheAttribute。如果是,则不应用无缓存设置。例如,我的代码是:
[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class)]
public sealed class NoCacheAttribute : FilterAttribute, IResultFilter
{
public void OnResultExecuted(ResultExecutedContext filterContext)
{
if (/* action does not have OutputCacheAttribute */)
{
var cache = filterContext.HttpContext.Response.Cache;
cache.SetCacheability(HttpCacheability.NoCache);
cache.SetRevalidation(HttpCacheRevalidation.ProxyCaches);
cache.SetExpires(DateTime.Now.AddYears(-5));
cache.AppendCacheExtension("private");
cache.AppendCacheExtension("no-cache=Set-Cookie");
cache.SetProxyMaxAge(TimeSpan.Zero);
}
}
}
问题是我不知道如何从传递给OnResultExecuted方法的ResultExecutedContext变量中获取操作及其属性。
答案 0 :(得分:4)
这个答案适用于MVC4,因为MVC5有filter overrides
似乎没有一种干净的方式(我避免反思。哎呀!)从ActionDescriptor
获取OnResultExecuted
与您提供的SO链接中未接受的答案相反,OutputCacheAttribute确实控制了客户端缓存,因此:
在全球
filters.Add(new OutputCacheAttribute { Location = OutputCacheLocation.None, NoStore = true });
然后在行动中
//The OutputCacheAttribute in the global filter won't be called
//Only this OutputCacheAttribute is called since AllowMultiple in OutputCacheAttribute is false
[[OutputCacheAttribute(Location = OutputCacheLocation.Server, Duration = 100)]
public ActionResult Index()
{
return View();
}
检查响应标头以验证
答案 1 :(得分:0)
试试这个
filterContext.Controller.GetType().GetMethod(action).GetCustomAttributes(typeof(OutputCacheAttribute), true).Length == 0