Delegate ExceptionNormalizer

Converts an unexpected exception into an enriched HttpRequestException.

Namespace: NanoRoute

Assembly: NanoRoute.dll

Syntax

public delegate HttpRequestException ExceptionNormalizer(Exception exception)

Parameters

Type	Name	Description
Exception	exception	The exception thrown by a later handler in the routing pipeline.

Returns

Type	Description
HttpRequestException	The HttpRequestException that should be thrown by the exception-handling middleware.

Remarks

Normalizers are configured with ConfigureExceptionHandling<TBuilder>(TBuilder, ConfigureBuilderDelegate<ExceptionHandlingConfig>). They run only for exception types registered in ExceptionNormalizers. Existing HttpRequestException and OperationCanceledException values are not normalized by AddExceptionHandler<TBuilder>(TBuilder). Exceptions thrown by a normalizer propagate from the exception-handling middleware.

Examples

builder.ConfigureExceptionHandling(config => config with
{
    ExceptionNormalizers = config.ExceptionNormalizers.SetItems
    ([
        ExceptionNormalizer.For<InvalidOperationException>
        (
            static ex => new HttpRequestException("Bad state", ex, HttpStatusCode.Conflict)
        )
    ])
});