BFF Silent Login Endpoint Extensibility

The BFF silent login endpoint can be customized by implementing the ISilentLoginEndpoint.

Caution

In BFF V3, the ISilentLoginEndpoint interface is called ISilentLoginService instead.

Danger

The silent login endpoint has been marked as obsolete in BFF V4 and will be removed in a future version. To handle silent login in the future, pass the prompt=none parameter on to the login endpoint instead.

Request Processing

V4

You can customize the behavior of the silent login endpoint by implementing the ProcessRequestAsync method of the ISilentLoginEndpoint interface. The default implementation can serve as a starting point for your own implementation.

If you want to extend the default behavior of the silent login endpoint, you can instead add a custom endpoint and call the original endpoint implementation:

Program.cs

var bffOptions = app.Services.GetRequiredService<IOptions<BffOptions>>().Value;

app.MapGet(bffOptions.SilentLoginPath, async (HttpContext context, CancellationToken ct) =>
{
  // Custom logic before calling the original endpoint implementation
  var endpointProcessor = context.RequestServices.GetRequiredService<ISilentLoginEndpoint>();
  await endpointProcessor.ProcessRequestAsync(context, ct);
  // Custom logic after calling the original endpoint implementation
});

V3

ProcessRequestAsync is the top-level function called in the endpoint service DefaultSilentLoginService, and can be used to add arbitrary logic to the endpoint.

For example, you could take whatever actions you need before normal processing of the request like this:

public override Task ProcessRequestAsync(HttpContext context, CancellationToken ct)
{
  // Custom logic here

  return base.ProcessRequestAsync(context);
}