asp.net identity 2.1 injecting IAuthenticationManager using StructureMap

Question

Can anyone point me in the direction of some samples or instructions on how to achieve this please?

Selene

Full code is available here: https://mcmap.net/q/1023960/-how-to-configure-asp-net-identity-applicationusermanager-with-structuremap – Croissant

Answer 1

I have not used StructureMap, but I have done this with Autofac and SimpleInjector.

Autofac registration would look like this:

builder.Register(c => HttpContext.Current.GetOwinContext().Authentication).As<IAuthenticationManager>();

Registration in SimpleInjector looks like this:

container.RegisterPerWebRequest(() => HttpContext.Current.GetOwinContext().Authentication);

And from looking on StructureMap tutorial I can guess that registration there would be something like this:

ForRequestedType<IAuthenticationManager>()
    .TheDefaultIs(() => HttpContext.Current.GetOwinContext().Authentication)

Mckee

This is what I had thought it would be but it throws an error as the HttpContext.Current.GetOwinContext().Authentication is null. – Selene

This means you are trying to resolve IAuthenticationManager before there OwinContext is created for the request. Usually this happens when you try to resolve it without http-request, i.e. in Global.asax – Mckee

That is the problem, where should I be doing this? – Selene

Why do you need IAuthenticationManager before the request happens? – Mckee

I don't. Where should I be initializing my container so that the OwinContext is present? – Selene

mm.. only reason I can think of is that container resolving objects in Global.asax, and one of the resolved objects needs IAuthenticationManager. This caught me once as well, I needed UserManager in Global.asax to make sure Admin user is created. And UserManager was dependent on IAuthManager. Are you not doing something like this? – Mckee

Also there is a chance that StructureMap creates all the instances on registration and tries to resolve IAuthManager at the same time. Try doing late resolving. Something like this answer: https://mcmap.net/q/1921653/-register-a-default-instance-in-structuremap – Mckee

Thanks, that post helped a lot. – Selene

Good! Can you post your solution as an answer please. I did struggle with this very issue, would be good if the solution is available to the community. – Mckee

It was as simple as: For<IAuthenticationManager>().Use<MyAuthenticationManager>(() => new MyAuthenticationManager(HttpContext.Current.GetOwinContext().Authentication)); – Selene

Answer 2

This initially came about by converting Identity to use int as the unique key values as described here.

I then extended this and created a custom AuthenticationManager using IAuthenticationManager.

I then setup StructureMap as follows:

For<IAuthenticationManager>()
    .Use<MyAuthenticationManager>(
     () => new MyAuthenticationManager(HttpContext.Current.GetOwinContext().Authentication));

Thanks @trailmax

Selene

Nice solution. Decorator for the win! – Mckee