How do I set an Expires header on a response in ASP.net core mvc

Question

In a controller action, returning an IActionResult, how do I set an expires header?

I found this, but it seems to relate to server side caching, not simply setting a response header. I feel this should be really straightforward !

Answer 1

You can inside your contoller set the header:

string ExpireDate = DateTime.UtcNow.AddMinutes(60).ToString("ddd, dd MMM yyyy HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);
Response.Headers.Add("Expires", ExpireDate + " GMT");