Log 500 Errors in WebApi 2

Question

How can one log all Internal Server Error 500 errors returned by all actions in Web Api 2? How do you intercept the error to be able to log the Stack Trace ?

Answer 1

I just wanted to keep it simple and make sure I logged the exception.

Create an ExceptionFilter class like below

public class ExceptionFilter : ExceptionFilterAttribute
{
    public override void OnException(HttpActionExecutedContext actionExecutedContext)
    {
        // actionExcutedContext.Exception is the exception log it however you wish
        Log.Exception(actionExecutedContext.Exception);

        actionExecutedContext.Response = actionExecutedContext.Request.CreateResponse(HttpStatusCode.InternalServerError, new
                                                                                                                          {
                                                                                                                              actionExecutedContext.Exception.Message
                                                                                                                          });
    }
}

You also must configure WebAPI to call the filter. This is done when you create your configuration.

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

The Log.Exception line is just a helper class for me, you can log it however you choose.