private static Response CreateNegotiatedResponse(NancyContext context, IResponseNegotiator responseNegotiator, Exception exception, HttpServiceError defaultError)
{
HttpServiceError httpServiceError = ExtractFromException(exception, defaultError);
Negotiator negotiator = new Negotiator(context)
.WithServiceError(httpServiceError);
return responseNegotiator.NegotiateResponse(negotiator, context);
}
private static HttpServiceError ExtractFromException(Exception exception, HttpServiceError defaultValue)
{
HttpServiceError result = defaultValue;
if (exception != null)
{
HttpServiceErrorException exceptionWithServiceError = exception as HttpServiceErrorException;
if (exceptionWithServiceError != null)
{
result = exceptionWithServiceError.HttpServiceError;
}
}
return result;
}
public static void Enable(IPipelines pipelines, IResponseNegotiator responseNegotiator, HttpServiceError defaultError)
{
if (pipelines == null)
{
throw new ArgumentNullException("pipelines");
}
if (responseNegotiator == null)
{
throw new ArgumentNullException("responseNegotiator");
}
if (defaultError == null)
{
throw new ArgumentNullException("defaultError");
}
pipelines.OnError += (context, exception) => HandleException(context, exception, responseNegotiator, defaultError);
}
private static Response HandleException(NancyContext context, Exception exception, IResponseNegotiator responseNegotiator, HttpServiceError defaultError)
{
LogException(context, exception);
return CreateNegotiatedResponse(context, responseNegotiator, exception, defaultError);
}
public static Negotiator WithServiceError(this Negotiator negotiator, HttpServiceError httpServiceError)
{
return negotiator
.WithStatusCode(httpServiceError.HttpStatusCode)
.WithModel(httpServiceError.ServiceError);
}