Web API generic error handling

Question

Using MVC API, If we throw an error within our API controller

public HttpResponseMessage GetError(int id)
    {
            int number1 = 3000;
            int number2 = 0;

            var t = number1 / number2;

    }

we would like to capture this error within our deligatingHandler

protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
 message = base.SendAsync(request, cancellationToken);
 if (!message.Result.IsSuccessStatusCode)
            {
              Log.Error(xxxxxxx)
             }
}

Checking all of the properties of the message, it only shows a generic error message and not the error that is thrown by the controller..

Log.Error(xxxxX)

is our call to log4net.

Is there a way to pass this error to the handler? or is there a better way to achieve this?

If you just want to do something with the exception, your best bet is probably a custom Exception Filter. — yaakov
– yaakov, Commented Feb 20, 2017 at 11:37

Sergey · Accepted Answer · 2017-02-20 12:10:47Z

2

It is better to use generic error attribute filter like below:

 public class ExceptionHandlingAttribute : ExceptionFilterAttribute
    {
        public override void OnException(HttpActionExecutedContext context)
        {

// log your error here 
           Log.Error(context.Exception);

            throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError)
            {
                Content = new StringContent("An error occurred, please try again or contact the administrator."),
                ReasonPhrase = "Critical Exception"
            });
        }

and register it in your WebApiConfig class like:

config.Filters.Add(new ExceptionHandlingAttribute());

answered Feb 20, 2017 at 12:10

Sergey

1914 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Web API generic error handling

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related