TryResolveAppFromHost

Attempts to map a request host to the application audience name configured for that host. The method checks AuthSettings.Hosts first, and when the host is localhost, it uses AuthSettings.LocalhostApp as the resolved application name.

The method returns false for null, empty, whitespace, unknown hosts, and localhost requests without a configured LocalhostApp instead of throwing.

Use this method when unknown hosts are expected and application code wants to decide how to respond. For strict validation flows where an unknown host should immediately fail, use ResolveAppFromHost.

Usage

using AlmightyShogun.AspNet.JwtAuth;

public static bool IsKnownAppHost(IAppHostResolver appHostResolver, string host)
{
    return appHostResolver.TryResolveAppFromHost(host, out string app)
        && app == "api";
}

Parameters

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

app: string
Resolved application audience name when the host is known.

Returns

true when the host is configured, otherwise false.

Type signature

public bool TryResolveAppFromHost(
    string? host,
    out string app
);