Nancy owin self hosting with Microsoft.Owin.HttpListener and windows authentication on .NET 4.0 (Personal opinion: avoid windows NTLM auth in web applications, even intranet ones. Use standards based SSO.)

NancyOwinSelfHostWindowsAuth.cs

namespace ConsoleApplication1
{
    using System;
    using System.Collections.Generic;
    using System.Net;
    using System.Security.Principal;
    using Microsoft.Owin.Hosting;
    using Nancy;
    using Owin;

    internal class Program
    {
        private static void Main(string[] args)
        {
            using (WebApp.Start<Startup>("http://localhost:9000"))
            {
                Console.WriteLine("Press Enter to quit.");
                Console.ReadKey();
            }
        }
    }

    internal class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var listener = (HttpListener) app.Properties["System.Net.HttpListener"];
            listener.AuthenticationSchemes = AuthenticationSchemes.IntegratedWindowsAuthentication;

            app.UseNancy();
        }
    }

    public class MyModule : NancyModule
    {
        public MyModule()
        {
            Get[""] = _ =>
            {
                var env = ((IDictionary<string, object>) Context.Items[Nancy.Owin.NancyOwinHost.RequestEnvironmentKey]);
                var user = (IPrincipal) env["server.User"];

                return "Hello " + user.Identity.Name;
            };
        }
    }
}

@Cruelio from here: https://github.com/NancyFx/Nancy/wiki/Hosting-nancy-with-owin I think your missing package is:
Nancy.Owin

Hi,

Thanks for the code snippet.

When I run this in Nancy.Owin 1.4.1 it give a compile error The type or namespace name 'NancyOwinHost' does not exist in the namespace 'Nancy.Owin' (are you missing an assembly reference?).

Do you know how do I get this to work with the latest build?

Thanks

Dave

Figured it out. I wanted:

var requestEnvironment = (IDictionary<string, object>) Context.Items["OWIN_REQUEST_ENVIRONMENT"];
var user = (IPrincipal) requestEnvironment["server.User"];