Generated: Thu 2012-03-01 14:22 CST
Source file: /home/alisue/Dropbox/Codes/django-permission/permission/backends/permission_backend.py
Stats: 15 executed, 5 missed, 2 excluded, 65 ignored
# vim: set fileencoding=utf-8 :
"""
Authentication backends for checking permissions
Method:
get_permission_handler
get permission handler of the model from registry
Class:
PermissionBackend
Authentication backend for checking permissions
AUTHOR:
lambdalisue[Ali su ae] (lambdalisue@hashnote.net)
License:
The MIT License (MIT)
Copyright (c) 2012 Alisue allright reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
"""
from __future__ import with_statement
from permission.handlers import registry
__all__ = ('PermissionBackend',)
class PermissionBackend(object):
"""Authentication backend for cheking permissions
This backend is used to check permissions. The permissions
are handled with ``PermissionHandler`` which have to be registered in
``fluidpermission.handlers.registry`` before use.
``has_perm(user_obj, perm, obj=None)`` method of detected model's
``PermissionHandler`` will be used to cheking process.
If no model was detected or no handler was registered, this backend
does not touch that permission and return ``None`` to pass the permission
checking process to downstream backends.
"""
supports_object_permissions = True
supports_anonymous_user = True
supports_inactive_user = True
def authenticate(self, username, password):
"""This backend is only for checking permission"""
return None
def has_perm(self, user_obj, perm, obj=None):
"""check permission"""
# get permission handlers fot this perm
handlers = registry.get_handlers(perm)
for handler in handlers:
if handler.has_perm(user_obj, perm, obj=obj):
return True
# do not touch this permission
return False
def has_module_perms(self, user_obj, app_label):
# get permission handlers fot this perm
handlers = registry.get_module_handlers(app_label)
for handler in handlers:
if handler.has_module_perms(user_obj, app_label):
return True
return False