mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-11-30 05:24:00 +03:00
115 lines
3.3 KiB
Python
115 lines
3.3 KiB
Python
"""
|
|
Provides a set of pluggable permission policies.
|
|
"""
|
|
|
|
|
|
SAFE_METHODS = ['GET', 'HEAD', 'OPTIONS']
|
|
|
|
|
|
class BasePermission(object):
|
|
"""
|
|
A base class from which all permission classes should inherit.
|
|
"""
|
|
|
|
def has_permission(self, request, view, obj=None):
|
|
"""
|
|
Return `True` if permission is granted, `False` otherwise.
|
|
"""
|
|
raise NotImplementedError(".has_permission() must be overridden.")
|
|
|
|
|
|
class AllowAny(BasePermission):
|
|
"""
|
|
Allow any access.
|
|
This isn't strictly required, since you could use an empty
|
|
permission_classes list, but it's useful because it makes the intention
|
|
more explicit.
|
|
"""
|
|
def has_permission(self, request, view, obj=None):
|
|
return True
|
|
|
|
|
|
class IsAuthenticated(BasePermission):
|
|
"""
|
|
Allows access only to authenticated users.
|
|
"""
|
|
|
|
def has_permission(self, request, view, obj=None):
|
|
if request.user and request.user.is_authenticated():
|
|
return True
|
|
return False
|
|
|
|
|
|
class IsAdminUser(BasePermission):
|
|
"""
|
|
Allows access only to admin users.
|
|
"""
|
|
|
|
def has_permission(self, request, view, obj=None):
|
|
if request.user and request.user.is_staff:
|
|
return True
|
|
return False
|
|
|
|
|
|
class IsAuthenticatedOrReadOnly(BasePermission):
|
|
"""
|
|
The request is authenticated as a user, or is a read-only request.
|
|
"""
|
|
|
|
def has_permission(self, request, view, obj=None):
|
|
if (request.method in SAFE_METHODS or
|
|
request.user and
|
|
request.user.is_authenticated()):
|
|
return True
|
|
return False
|
|
|
|
|
|
class DjangoModelPermissions(BasePermission):
|
|
"""
|
|
The request is authenticated using `django.contrib.auth` permissions.
|
|
See: https://docs.djangoproject.com/en/dev/topics/auth/#permissions
|
|
|
|
It ensures that the user is authenticated, and has the appropriate
|
|
`add`/`change`/`delete` permissions on the model.
|
|
|
|
This permission will only be applied against view classes that
|
|
provide a `.model` attribute, such as the generic class-based views.
|
|
"""
|
|
|
|
# Map methods into required permission codes.
|
|
# Override this if you need to also provide 'view' permissions,
|
|
# or if you want to provide custom permission codes.
|
|
perms_map = {
|
|
'GET': [],
|
|
'OPTIONS': [],
|
|
'HEAD': [],
|
|
'POST': ['%(app_label)s.add_%(model_name)s'],
|
|
'PUT': ['%(app_label)s.change_%(model_name)s'],
|
|
'PATCH': ['%(app_label)s.change_%(model_name)s'],
|
|
'DELETE': ['%(app_label)s.delete_%(model_name)s'],
|
|
}
|
|
|
|
def get_required_permissions(self, method, model_cls):
|
|
"""
|
|
Given a model and an HTTP method, return the list of permission
|
|
codes that the user is required to have.
|
|
"""
|
|
kwargs = {
|
|
'app_label': model_cls._meta.app_label,
|
|
'model_name': model_cls._meta.module_name
|
|
}
|
|
return [perm % kwargs for perm in self.perms_map[method]]
|
|
|
|
def has_permission(self, request, view, obj=None):
|
|
model_cls = getattr(view, 'model', None)
|
|
if not model_cls:
|
|
return True
|
|
|
|
perms = self.get_required_permissions(request.method, model_cls)
|
|
|
|
if (request.user and
|
|
request.user.is_authenticated() and
|
|
request.user.has_perms(perms, obj)):
|
|
return True
|
|
return False
|