Implement HTTP Cache (ETag) in ASP.NET Core Web API

Question

I am working on ASP.NET Core (ASP.NET 5) Web API application and have to implement HTTP Caching with the help of Entity Tags. Earlier I used CacheCow for the same but it see

Answer 1

As an addendum to Erik Božič's answer I found that the HttpContext object was not reporting back the StatusCode correctly when inheriting from ActionFilterAttribute, and applied controller-wide. HttpContext.Response.StatusCode was always 200, indicating it was probably not set by this point in the pipeline. I was instead able to grab the StatusCode from ActionExecutedContext context.Result.StatusCode.