# -*- coding: utf-8 -*-
from __future__ import unicode_literals
"""
Backend
This is a modification of django-registration_ ``backends/__init__.py``
The original code is written by James Bennett
.. _django-registration: https://bitbucket.org/ubernostrum/django-registration
Original License::
Copyright (c) 2007-2011, James Bennett
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of the author nor the names of other
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""
__author__ = 'Alisue <lambdalisue@hashnote.net>'
__all__ = ('get_backend', 'RegistrationBackendBase')
from django.core.exceptions import ImproperlyConfigured
from registration.conf import settings
from registration.compat import import_module
from registration.backends.base import RegistrationBackendBase
def get_backend_class(path=None):
"""
Return an class of a registration backend, given the dotted
Python import path (as a string) to the backend class.
If the backend cannot be located (e.g., because no such module
exists, or because the module does not contain a class of the
appropriate name), ``django.core.exceptions.ImproperlyConfigured``
is raised.
"""
path = path or settings.REGISTRATION_BACKEND_CLASS
i = path.rfind('.')
module, attr = path[:i], path[i+1:]
try:
mod = import_module(module)
except ImportError as e:
raise ImproperlyConfigured(
'Error loading registration backend %s: "%s"' % (module, e))
try:
cls = getattr(mod, attr)
except AttributeError:
raise ImproperlyConfigured((
'Module "%s" does not define a registration backend named "%s"'
) % (module, attr))
if cls and not issubclass(cls, RegistrationBackendBase):
raise ImproperlyConfigured((
'Registration backend class "%s" must be a subclass of '
'``registration.backends.RegistrationBackendBase``') % path)
return cls
[docs]def get_backend(path=None):
"""
Return an instance of a registration backend, given the dotted
Python import path (as a string) to the backend class.
If the backend cannot be located (e.g., because no such module
exists, or because the module does not contain a class of the
appropriate name), ``django.core.exceptions.ImproperlyConfigured``
is raised.
"""
return get_backend_class(path)()