OwinController for ASP.NET MVC

OwinController.cs

public abstract class OwinController : Controller
{
    private const string OwinEnvironmentKey = "owin.Environment";

    protected OwinRequest OwinRequest { get { return GetOwinRequest(HttpContext); } }
    protected OwinResponse OwinResponse { get { return GetOwinResponse(HttpContext); } }

    protected virtual void SignIn(ClaimsPrincipal principal)
    {
    }

    protected virtual void SignIn(string authenticationType, IEnumerable<Claim> claims, string nameClaimType, string roleClaimType, bool isPersistent)
    {
        if (authenticationType == null)
        {
            throw new ArgumentNullException("authenticationType");
        }
        if (claims == null)
        {
            throw new ArgumentNullException("claims");
        }
        if (nameClaimType == null)
        {
            throw new ArgumentNullException("nameClaimType");
        }
        if (roleClaimType == null)
        {
            throw new ArgumentNullException("roleClaimType");
        }

        SignIn(new ClaimsPrincipal(new ClaimsIdentity(claims, authenticationType, nameClaimType, roleClaimType)));
    }

    // private helpers

    private static IDictionary<string, object> GetOwinEnvironment(HttpContextBase httpContext)
    {
        return (IDictionary<string, object>)httpContext.Items[(object)OwinEnvironmentKey];
    }

    private static OwinRequest GetOwinRequest(HttpContextBase httpContext)
    {
        IDictionary<string, object> owinEnvironment = GetOwinEnvironment(httpContext);
        if (owinEnvironment == null)
        {
            throw new InvalidOperationException("Could not found the OWIN environment");
        }

        return new OwinRequest(owinEnvironment);
    }

    private static OwinResponse GetOwinResponse(HttpContextBase httpContext)
    {
        IDictionary<string, object> owinEnvironment = GetOwinEnvironment(httpContext);
        if (owinEnvironment == null)
        {
            throw new InvalidOperationException("Could not found the OWIN environment");
        }

        return new OwinResponse(owinEnvironment);
    }
}