Get current owin context in self host mode

Question

I need to run my application which provides some ASP.NET Web API services on both IIS and .NET CLR self host modes. I developed my ASP.NET Web API services based on OWIN and it is working fine on both hosts. For now I need something like this:

public class OwinContextInfrastructure
    {
        public static IOwinContext Current
        {
            get
            {
                if (HttpContext.Current != null)
                {
                    return HttpContext.Current.GetOwinContext();
                }
                else
                {
                    // What should I do here ?
                    return null;
                }
            }
        }
    }

to get current owin context whenever I need in my application.

My code is working fine on IIS, but what should I do in .NET Self Host mode ?

Answer 1

You can use Request.GetOwinContext() for both web-hosting and self-hosting. GetOwinContext is an extension method for HttpRequestMessage and is defined in the System.Web.Http.Owin.dll assembly.

UPDATE

I have answered your original question, which is how to get OWIN context in both web-hosting and self-hosting. Now, through your additional question in the comment, you have significantly broadened the scope of your question. There is a fundamental problem though. IOwinContext is not a OWIN thing, it is a Katana thing. You cannot expect any framework hosted on OWIN to provide a context in the form of IOwinContext. ASP.NET Web API does but not every framework is supposed to. IOwinContext is an abstraction over OWIN environment dictionary and this dictionary will be available to any OWIN middleware. However, by working on top of a framework, you no longer can access the OWIN environment directly but only through how that specific framework has decided to expose the context.

For Nancy, you have to use NancyContext to get to the Items dictionary and look for the value corresponding to the key "OWIN_REQUEST_ENVIRONMENT". For SignalR, Environment property of IRequest gives you access to OWIN environment. Once you have the OWIN environment, you can create a new OwinContext using the environment.