ResolveAppFromHost

Resolves a request host to its configured application audience name. The method uses AuthSettings.Hosts for configured host names and AuthSettings.LocalhostApp when the host is localhost.

Unlike TryResolveAppFromHost, this method throws UnauthorizedAccessException when the host is missing, unknown, or localhost is used without a configured LocalhostApp.

Use this method when an unknown host should be treated as an authentication or authorization failure. This mirrors the package's JWT validation behavior, where a token is rejected when the current host cannot be mapped to an app.

Usage

using AlmightyShogun.AspNet.JwtAuth;

public sealed class AppScopedService(IAppHostResolver appHostResolver)
{
    public string GetAppForRequestHost(string host)
        => appHostResolver.ResolveAppFromHost(host);
}

Parameters

host: string?
Request host name to resolve, such as api.example.com.

Returns

The configured application audience name for the host.

Type signature

public string ResolveAppFromHost(string? host);