private async Task <Exception> ZipApiExceptionFromResponseAsync(HttpResponseMessage response)
{
ZipErrorResponse errors = null !;
//If we fail to parse the error body that's unfortunate, but don't hide the original error.
//TODO: should perhaps log or otherwise expose the deserialisation failure without hiding the
//original exception. For now, just do our best to report the exception that really matters (original).
string?content = null;
if (response.Content != null)
{
content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
}
if (!String.IsNullOrEmpty(content))
{
try
{
errors = System.Text.Json.JsonSerializer.Deserialize <ZipErrorResponse>(content, _SerializerOptions);
errors.ResponseCode = Convert.ToInt32(response.StatusCode, System.Globalization.CultureInfo.InvariantCulture);
}
catch { }
}
if (errors == null)
{
errors = new ZipErrorResponse()
{
Message = response.ReasonPhrase,
ResponseCode = Convert.ToInt32(response.StatusCode, System.Globalization.CultureInfo.InvariantCulture)
};
}
throw new ZipApiException(errors);
}
private static string ErrorMessageFromZipErrors(ZipErrorResponse error)
{
//Often (not always) a '400' response has a pretty generic 'error.Message' value which isn't helpful (i.e 'The request is invalid'),
//in this case include the 'error.ErrorCode' value which often provides a better hint about what is wrong ('AboveMaximumPreApprovalAmount').
if (error.ResponseCode == 400 && !String.IsNullOrEmpty(error.ErrorCode) && !String.IsNullOrEmpty(error.Message))
{
return($"({error.ErrorCode}) {error.Message}");
}
return(error?.Message
?? error?.Detail
?? error?.ValidationErrors?.FirstOrDefault().ErrorMessages?.FirstOrDefault()
?? error?.ErrorCode
?? error?.Title
?? ErrorMessage.UnknownApiError);
}
/// <summary>
/// Full constructor, recommended.
/// </summary>
/// <param name="error">A <see cref="ZipErrorResponse"/> containing full errors received from the Zip API.</param>
/// <param name="inner">Another exception being wrapped by this one.</param>
public ZipApiException(ZipErrorResponse error, Exception inner) : base(ErrorMessageFromZipErrors(error), inner)
{
Errors = error;
}