Django snippets: Message exception

Message exception

from django.http import HttpResponseRedirect

class HttpMessageMiddleware(object):
    def process_exception(self, request, exception):
        if request.user.is_authenticated():
            request.user.message_set.create(message=unicode(exception))
            return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))

class HttpMessage(Exception):
    pass

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This exception is util when you want to raise an exception but want its message be shown as a message to the user, with no error 500 or 404 pages.

To use it, just append the middleware in the MIDDLEWARE_CLASSES setting and raises HttpMessage when necessary.

Author:: marinho
Posted:: October 14, 2008
Language:: Python
Version:: 1.0
Tags:: http redirect message exception
Score:: 1 (after 1 ratings)

Tools

Comments

amitu (on October 15, 2008):

It can go in infinite loop. May be some query string parameter can be used to circumvent that.

guettli (on October 30, 2008):

This recipe catches all errors. "except HttpMessage" is missing in process_exception().