Misago/misago/core/middleware/exceptionhandler.py

from misago.views import exceptionhandler
from misago.views.utils import is_request_to_misago


class ExceptionHandlerMiddleware(object):
    def process_exception(self, request, exception):
        request_is_to_misago = is_request_to_misago(request)
        misago_can_handle_exception = exceptionhandler.is_misago_exception(
            exception)

        if request_is_to_misago and misago_can_handle_exception:
            return exceptionhandler.handle_misago_exception(request, exception)
        else:
            return None