asp.net mvc - Setup OWIN dynamically (by domain)

Question

We are trying to setup a white label on our project that uses OWIN(includes FB, google, Live logins). Is there a way to setup their API credential dynamically, say if they changes the domain the settings will change.

I think owin loads earlier than MVC? Is there a way that we can load it on Global.asax(Request)?

public partial class Startup
{
    public void Configuration(IAppBuilder app)
    {
        ConfigureAuth(app);
    }
}

UPDATE:

In other words a single Application will host many domains and sub domains(white labeling).

Answer 1

I have been googling on the same things today. Then I found a nice OWIN sample at http://aspnet.codeplex.com/SourceControl/latest#Samples/Katana/BranchingPipelines/BranchingPipelines.sln that explained the branching capabilities of OWIN. If I understand this sample correctly, you should be able to configure different OWIN stacks depending on request parameters such as host header, cookie, path or whatever using the app.Map() or app.MapWhen() methods.

Let's say you have 2 different DNS domains representing 2 customers with different login configs, you can initialize OWIN to use different configs depending on the value of the host header:

public class Startup
{
    public void Configuration(IAppBuilder app)
    {

        app.MapWhen(ctx => ctx.Request.Headers.Get("Host").Equals("customer1.cloudservice.net"), app2 =>
        {
            app2.UseWsFederationAuthentication(...);
        });
        app.MapWhen(ctx => ctx.Request.Headers.Get("Host").Equals("customer2.cloudservice.net"), app2 =>
        {
            app2.UseGoogleAuthentication(...);
        });
    }
}