BFF Management Endpoints Extensibility

The behavior of each management endpoint is defined in a service. When you add Duende.BFF to DI, a default implementation for every management endpoint gets registered:

// management endpoints
builder.Services.AddTransient<ILoginService, DefaultLoginService>();
builder.Services.AddTransient<ISilentLoginService, DefaultSilentLoginService>();
builder.Services.AddTransient<ISilentLoginCallbackService, DefaultSilentLoginCallbackService>();
builder.Services.AddTransient<ILogoutService, DefaultLogoutService>();
builder.Services.AddTransient<IUserService, DefaultUserService>();
builder.Services.AddTransient<IBackchannelLogoutService, DefaultBackchannelLogoutService>();
builder.Services.AddTransient<IDiagnosticsService, DefaultDiagnosticsService>();

You can add your own implementation by overriding the default after calling AddBff().

The management endpoint services all inherit from the IBffEndpointService, which provides a general-purpose mechanism to add custom logic to the endpoints.

public interface IBffEndpointService
    Task ProcessRequestAsync(HttpContext context);

None of the endpoint services contain additional members beyond ProcessRequestAsync.

You can customize the behavior of the endpoints either by implementing the appropriate interface or by extending the default implementation of that interface. In many cases, extending the default implementation is preferred, as this allows you to keep most of the default behavior by calling the base ProcessRequestAsync from your derived class. Several of the default endpoint service implementations also define virtual methods that can be overridden to customize their behavior with more granularity. See the following pages for details on those extension points.