Re: Best way for handle missing args in REST interface in vibed

[Suliman via Digitalmars-d-learn]

I wrote next code:

        void foo(string _error = null)
        {
            writeln("Error");
        }
    override:
        @errorDisplay!foo
        Json doTrackSpeedAnalyze(int trackid, string 
startDateTime, string endDateTime) // 
/api/mytrack?trackid=123&startDateTime=2000&endDateTime=2010
        {
            if(endDateTime.length == 0)
            {
                throw new Exception("End Date must not be empty");
            }
            return Json.emptyObject;
        }
If I access to url:  /api/mytrack?trackid=123&startDateTime=2000 
(witout endDateTime) I am expecting execution foo() block, but it 
does not happens. Why?

And what do Exception here? Why should handle it?