how can cache "NotFound" page in asp .net core

Question

I have a custom NotFound page in my project that every false URL redirect to it by this code:

In startup.cs:

app.UseStatusCodePagesWithRedirects("/not-found");

I want to serve this static page by a cache policy. how can I do it?

Answer 1

You can first install this nuget package:

WebEssentials.AspNetCore.OutputCaching

And then add these code in startup.cs:

services.AddOutputCaching(); //ConfigureServices()

and

app.UseOutputCaching();  //Configure()

At last, add OutputCache attribute to your notfound() action, then it's output will be cached:

[OutputCache(Duration = 6000)] //cache 6000 seconds
    public IActionResult notfound()
    {
        return View(DateTime.Now);
    }

Result: