ASP.NET Web API: Non-descriptive 500 Internal Server Error

Question

As title says, I’ve got 500 Internal Server Error from GET request to an IQueryable action. The body of the error is empty. That error happens after my action returns result

Answer 1

You can try adding:

GlobalConfiguration.Configuration.IncludeErrorDetailPolicy = 
    IncludeErrorDetailPolicy.Always;

to your Application_Start() in the Global.asax. This solution works for many of the common errors.

If, however, you aren't getting satisfactory information you should consider writing an l Exception Filter and registering it globally.

This article should get you started. The core of what you need is to write & register something like:

public class NotImplExceptionFilter : ExceptionFilterAttribute {
  public override void OnException(HttpActionExecutedContext context) {
     if (context.Exception is NotImplementedException) {
       context.Response = new HttpResponseMessage(HttpStatusCode.NotImplemented);
    }
  }
}