为每个用户mvc配置输出缓存

Question

I have a user specific dashboard. The dashboard will only change daily, I want to use MVC's OutputCache . Is there any way to configure the caching per user and to expire when the request is a new day?

I have researched this and found you can extend the OutputCache attribute to dynamically set your duration however how can I configure this per user?

Thanks in advance

Answer 1

In your Web.config :

<caching>
  <outputCacheSettings>
    <outputCacheProfiles>
      <add name="Dashboard" duration="86400" varyByParam="*" varyByCustom="User" location="Server" />
    </outputCacheProfiles>
  </outputCacheSettings>
</caching>

In your Controller / Action :

[OutputCache(CacheProfile="Dashboard")]
public class DashboardController { ...}

Then in your Global.asax :

//string arg filled with the value of "varyByCustom" in your web.config
public override string GetVaryByCustomString(HttpContext context, string arg)
{
    if (arg == "User")
        {
        // depends on your authentication mechanism
        return "User=" + context.User.Identity.Name;
        //return "User=" + context.Session.SessionID;
        }

    return base.GetVaryByCustomString(context, arg);
}

In essence, GetVaryByCustomString lets you write a custom method to determine whether there will be a Cache hit/miss .

Answer 2

Try this in web.config,

<system.web>
 ...........
 ...........
 <caching>
  <outputCacheSettings>
    <outputCacheProfiles>
      <add name="UserCache" duration="1440" varyByParam="UserID" enabled="true" location="Client"/>
    </outputCacheProfiles>
  </outputCacheSettings>
</caching>