Am Mittwoch, 23. März 2016 15:57:32 UTC+1 schrieb [email protected]:
 

> A more general question, is this a good way to handle exceptions caught in 
> mojo callback functions?   An alternative would be to not throw an 
> exception and instead, render error data that gets returned to the .ajax 
> .done handler (200 response code).  The .done handler is then responsible 
> to detect the error values and display an error message to the user.  This 
> would not generate the 500 response code which could still be thrown by the 
> http server.
>

Oh my, I´m always struggling with that question myself. :-]
I honestly don´t know if there´s a "correct" answer to that question.

There´s those - especially with a REST background - who say that you should 
use the HTTP status codes for signalling application state.

And then there´s those who tell you that if your code handled the situation 
then you should go with a HTTP status code indicating success and put error 
codes in app specific data structures; leaving HTTP status codes and 
especially error codes for those situations where your server side code 
didn´t cope with the situation.

Of course you could also use a HTTP error status _and_ return a data 
structure with additional information.

The answer may even depend on wether you´re talking about an API or a user 
interface.

Maybe it´s just again a case of "select one option and stick with it".
Or maybe someone in this group with more experience can chime in and give 
some better advice... I would be interested in hearing it, too.

- Heiko

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