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try:
from functools import update_wrapper, wraps
except ImportError:
from django.utils.functional import update_wrapper, wraps # Python 2.4 fallback.
from django.contrib.auth import REDIRECT_FIELD_NAME
from django.http import HttpResponseRedirect
from django.utils.decorators import available_attrs
from django.utils.http import urlquote
def user_passes_test(test_func, login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):
"""
Decorator for views that checks that the user passes the given test,
redirecting to the log-in page if necessary. The test should be a callable
that takes the user object and returns True if the user passes.
"""
if not login_url:
from django.conf import settings
login_url = settings.LOGIN_URL
def decorator(view_func):
def _wrapped_view(request, *args, **kwargs):
if test_func(request.user):
return view_func(request, *args, **kwargs)
path = urlquote(request.get_full_path())
tup = login_url, redirect_field_name, path
return HttpResponseRedirect('%s?%s=%s' % tup)
return wraps(view_func, assigned=available_attrs(view_func))(_wrapped_view)
return decorator
def login_required(function=None, redirect_field_name=REDIRECT_FIELD_NAME):
"""
Decorator for views that checks that the user is logged in, redirecting
to the log-in page if necessary.
"""
actual_decorator = user_passes_test(
lambda u: u.is_authenticated(),
redirect_field_name=redirect_field_name
)
if function:
return actual_decorator(function)
return actual_decorator
def permission_required(perm, login_url=None):
"""
Decorator for views that checks whether a user has a particular permission
enabled, redirecting to the log-in page if necessary.
"""
return user_passes_test(lambda u: u.has_perm(perm), login_url=login_url)
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