katana host

gistfile1.cs

   public class CustomeOwinHost
    {
        private readonly Func<IDictionary<string, object>, Task> next;

        public CustomeOwinHost(Func<IDictionary<string, object>, Task> next, string foo)
        {
            this.next = next;
        }

        public Task Invoke(IDictionary<string, object> environment)
        {
            var path =
                environment.Get<string>("owin.RequestPath");

            if (path == "/custom")
            {
                var tcs = 
                    new TaskCompletionSource<int>();

                var headers =
                    environment.Get<IDictionary<string, string[]>>("owin.ResponseHeaders");

                headers["Content-Type"] = new [] { "text/html" };

                var body =
                    environment.Get<Stream>("owin.ResponseBody");

                using (var writer = new StreamWriter(body))
                {
                    writer.Write("Response from the custom host2.");
                }

                //tcs.SetResult(0);
                return tcs.Task;
            }

            return next.Invoke(environment);
        }
    }

Line 28 is closing the response stream, which is not OWIN compliant http://owin.org/spec/owin-1.0.0.html#_3.5._Response_Body ?

I fixed similar in Nancy NancyFx/Nancy#1016

Memory leak! Resources are not cleaned up until the returned task completes.