如何在ASP.NET MVC中基于每个用户删除输出缓存？

I'm using VaryByCustom to create an output cache on a per-browser and per-user basis:

我正在使用VaryByCustom在每个浏览器和每个用户的基础上创建输出缓存:

[OutputCache(Duration = 6000, VaryByParam = "*", VaryByCustom="browser;userName")]

(I've overridden GetVaryByCustomString() to make this work.)

(我已经重写了GetVaryByCustomString()以使其工作。)

I need to be able to remove a single user's output cache, without invalidating the output cache of different users, if possible. I've read about HttpResponse.RemoveOutputCacheItem(), but that works by removing the output cache based on path. Is there any way to do this based on the VaryByCustom string?

我需要能够删除单个用户的输出缓存,如果可能的话,不会使不同用户的输出缓存失效。我已经阅读了HttpResponse.RemoveOutputCacheItem(),但这可以通过删除基于路径的输出缓存来实现。有没有办法根据VaryByCustom字符串执行此操作?

3 个解决方案

#1

You can take the advantage of VaryByCustom property in [OutputCache] by overriding HttpApplication.GetVaryByCustomString and check HttpContext.Current.User.IsAuthenticated.

您可以通过覆盖HttpApplication.GetVaryByCustomString并检查HttpContext.Current.User.IsAuthenticated来利用[OutputCache]中的VaryByCustom属性。

This is what I will create in Global.asax.cs file:

这是我将在Global.asax.cs文件中创建的内容:

public override string GetVaryByCustomString(HttpContext context, string custom)
    {
        if (custom == "UserName")
        {
            if (context.Request.IsAuthenticated)
            {
                return context.User.Identity.Name;
            }
            return null;
        }

        return base.GetVaryByCustomString(context, custom);
    }

And then use it in OutputCache attribute:

然后在OutputCache属性中使用它:

[OutputCache(Duration = 10, VaryByParam = "none", VaryByCustom = "UserName")]
public ActionResult Profiles()
{
    //...
}

but be careful that the username should be immutable in this case!

但请注意,在这种情况下用户名应该是不可变的!

#2

Why not have the user in the parameters and then it would be per-user through the VaryByParam.

为什么不让用户参与参数,然后通过VaryByParam为每个用户。

#3

perhaps use

Response.Cache.SetVaryByCustom(string custom);

in an ActionFilter the you can build up the string including browser version and user

在ActionFilter中,您可以构建包括浏览器版本和用户的字符串

#1