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110 lines
3.8 KiB
Python
110 lines
3.8 KiB
Python
from django.conf import settings
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from django.contrib.auth import REDIRECT_FIELD_NAME
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from django.contrib.auth.views import redirect_to_login
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from django.core.exceptions import ImproperlyConfigured, PermissionDenied
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class AccessMixin:
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"""
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Abstract CBV mixin that gives access mixins the same customizable
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functionality.
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"""
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login_url = None
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permission_denied_message = ''
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raise_exception = False
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redirect_field_name = REDIRECT_FIELD_NAME
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def get_login_url(self):
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"""
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Override this method to override the login_url attribute.
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"""
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login_url = self.login_url or settings.LOGIN_URL
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if not login_url:
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raise ImproperlyConfigured(
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'{0} is missing the login_url attribute. Define {0}.login_url, settings.LOGIN_URL, or override '
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'{0}.get_login_url().'.format(self.__class__.__name__)
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)
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return str(login_url)
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def get_permission_denied_message(self):
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"""
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Override this method to override the permission_denied_message attribute.
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"""
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return self.permission_denied_message
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def get_redirect_field_name(self):
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"""
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Override this method to override the redirect_field_name attribute.
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"""
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return self.redirect_field_name
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def handle_no_permission(self):
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if self.raise_exception or self.request.user.is_authenticated:
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raise PermissionDenied(self.get_permission_denied_message())
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return redirect_to_login(self.request.get_full_path(), self.get_login_url(), self.get_redirect_field_name())
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class LoginRequiredMixin(AccessMixin):
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"""Verify that the current user is authenticated."""
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def dispatch(self, request, *args, **kwargs):
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if not request.user.is_authenticated:
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return self.handle_no_permission()
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return super().dispatch(request, *args, **kwargs)
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class PermissionRequiredMixin(AccessMixin):
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"""Verify that the current user has all specified permissions."""
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permission_required = None
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def get_permission_required(self):
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"""
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Override this method to override the permission_required attribute.
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Must return an iterable.
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"""
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if self.permission_required is None:
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raise ImproperlyConfigured(
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'{0} is missing the permission_required attribute. Define {0}.permission_required, or override '
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'{0}.get_permission_required().'.format(self.__class__.__name__)
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)
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if isinstance(self.permission_required, str):
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perms = (self.permission_required,)
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else:
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perms = self.permission_required
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return perms
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def has_permission(self):
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"""
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Override this method to customize the way permissions are checked.
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"""
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perms = self.get_permission_required()
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return self.request.user.has_perms(perms)
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def dispatch(self, request, *args, **kwargs):
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if not self.has_permission():
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return self.handle_no_permission()
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return super().dispatch(request, *args, **kwargs)
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class UserPassesTestMixin(AccessMixin):
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"""
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Deny a request with a permission error if the test_func() method returns
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False.
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"""
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def test_func(self):
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raise NotImplementedError(
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'{0} is missing the implementation of the test_func() method.'.format(self.__class__.__name__)
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)
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def get_test_func(self):
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"""
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Override this method to use a different test_func method.
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"""
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return self.test_func
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def dispatch(self, request, *args, **kwargs):
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user_test_result = self.get_test_func()()
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if not user_test_result:
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return self.handle_no_permission()
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return super().dispatch(request, *args, **kwargs)
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