MVC 6 Areas and multiple login pages redirect - asp.net

Question

I'd been searching for a solution to this problem for quite a long time but unfortunately haven't found any nice and elegant way to handle it.
Here are the details:
My MVC 6 application use Areas. Each area has separate directories for the Controllers, Views etc.
Authentication is based on the standard out of the box web application template with user accounts stored in sql server
What I want to achieve is:
When user enters /AreaA/Restricted/Page then he is redirected into /AreaA/Account/Login
When user enters /AreaB/Restricted/Page then he is redirected into /AreaB/Account/Login etc...
Even though I can change the stanard login page redirect from "/Account/Login" into something different like this:
services.Configure<IdentityOptions>(options=> {
options.Cookies.ApplicationCookie.LoginPath =
new Microsoft.AspNet.Http.PathString("/HardcodedAreaName/Account/Login");
});
I am not able to redirect into different actions/login pages for each area.
Prior to MVC 6 I was able to use AuthorizeAttribute with url parameter:
public class CustomAuthorization : AuthorizeAttribute
{
public string Url { get; set; }
// redirect to login page with the original url as parameter.
protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
{
filterContext.Result = new RedirectResult(Url + "?returnUrl=" + filterContext.HttpContext.Request.Url.PathAndQuery);
}
}
and then passing the area dependent url by decorating each controller:
[CustomAuthorization(Url = "/Admin/Account/Login"]
public class AdminAreaController : Controller
{ ...
But it does not work anymore :(

Answer 1

Try the following and see if it works (I did try this and it works fine, but not sure If I have covered all scenarios):
The place where you register you CookieAuthentication middleware, you can do something like
app.UseCookieAuthentication(o =>
{
o.LoginPath = "/area1/login1";
o.AuthenticationScheme = "scheme1";
//TODO: set other interesting properties if you want to
});
app.UseCookieAuthentication(o =>
{
o.LoginPath = "/area2/login2";
o.AuthenticationScheme = "scheme2";
//TODO: set other interesting properties if you want to
});
On you controller/action, specify the authentication scheme..example:
[Authorize(ActiveAuthenticationSchemes = "scheme1")]
public IActionResult Test1()
{
return Content("Test1");
}
[Authorize(ActiveAuthenticationSchemes = "scheme2")]
public IActionResult Test2()
{
return Content("Test2");
}