public ErrorHandlingModule(
IErrorHandlingConfiguration errorHandlingConfiguration,
ExceptionStatusCodeMapper exceptionStatusCodeMapper,
ILoggerFactory loggerFactory
)
{
_errorHandlingConfiguration = errorHandlingConfiguration;
_exceptionStatusCodeMapper = exceptionStatusCodeMapper;
_loggerFactory = loggerFactory;
}
public static void UseRestErrorHandling(
this IMiddlewareSupport middlewareSupport,
IErrorHandlingConfiguration configuration,
ExceptionStatusCodeMapper mapper,
ILogger <ErrorHandlingModule> logger)
{
middlewareSupport.Use(async(context, next) =>
{
try
{
await next(context);
}
catch (Exception e)
{
logger.LogError(e, $"Error during processing request: {context.Request.Method} {context.Request.Url}");
var mimeTypes = context.Request.GetResponseMimeTypesPriority(new[]
{
MediaTypeNames.Application.Json,
MediaTypeNames.Text.Html
});
if (mimeTypes != null)
{
switch (mimeTypes.FirstOrDefault())
{
case MediaTypeNames.Application.Json:
await context.Response.SetJsonResponse(e, mapper, configuration);
return;
case MediaTypeNames.Text.Html:
await context.Response.SetHtmlResponse(e, configuration);
return;
}
}
await context.Response.SetHtmlResponse(e, configuration);
}
});
}
public static async Task SetJsonResponse(
this IResponse response,
Exception e,
ExceptionStatusCodeMapper exceptionStatusCodesMapper,
IErrorHandlingConfiguration configuration)
{
var responseStatusCode = exceptionStatusCodesMapper.GetStatusCode(e);
response.StatusCode = responseStatusCode;
response.SetHeader("Content-Type", MediaTypeNames.Application.Json);
var resp = new ErrorResponse
{
Status = (int)responseStatusCode,
Error = SomethingWentWrong
};
if (configuration.ShowCallStack)
{
resp.Exception = e;
}
await response.WriteBodyAsync(Body(resp));
}
