#10378: authenticate() method should not continue on built-in or generic exceptions ------------------------------------+--------------------------------------- Reporter: bendavis78 | Owner: nobody Status: new | Milestone: Component: Uncategorized | Version: 1.0 Keywords: authenticate TypeError | Stage: Unreviewed Has_patch: 0 | ------------------------------------+--------------------------------------- from django.contrib.auth, in authenticate(): {{{ for backend in get_backends(): try: user = backend.authenticate(**credentials) except TypeError: # This backend doesn't accept these credentials as arguments. Try the next one. continue if user is None: continue }}}
The authenticate method makes an assumption about the meaning of a !TypeError, being that "this backend doesn't accept these credentials as arguments". It ''should'' use a custom exception type where the meaning is more specific, such as !AuthInvalidCredentials or something. The reasoning behind this is that when creating your own authentication backend, it's possible to do some things that unexpectedly raise a more generic exception, such as !TypeError. This can produce some very unexpected results, as this will cause your backend to be "skipped" when it shouldn't have been. Granted, I could work around this by catching !TypeError within the backend, but the backend developer shouldn't have to know that he/she needs to do that. Plus, the developer would have to go through some hoops to actually see the exception that was caught (eg, extracting traceback info from sys.exc_info()) -- Ticket URL: <http://code.djangoproject.com/ticket/10378> Django <http://code.djangoproject.com/> The Web framework for perfectionists with deadlines. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django updates" group. To post to this group, send email to django-updates@googlegroups.com To unsubscribe from this group, send email to django-updates+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-updates?hl=en -~----------~----~----~----~------~----~------~--~---