def check_sites_middleware(app_configs, **kwargs):
if middlewares_or_subclasses_installed([SITE_PERMISSION_MIDDLEWARE]):
return [Warning(SITE_PERMISSION_MIDDLEWARE +
" missing from settings.MIDDLEWARE - per site"
" permissions not applied",
id="mezzanine.core.W04")]
return []
def check_sites_middleware(app_configs, **kwargs):
if middlewares_or_subclasses_installed([SITE_PERMISSION_MIDDLEWARE]):
return [
Warning(SITE_PERMISSION_MIDDLEWARE +
" missing from settings.MIDDLEWARE - per site"
" permissions not applied",
id="mezzanine.core.W04")
]
return []
def cache_installed():
"""
Returns ``True`` if a cache backend is configured, and the
cache middleware classes or subclasses thereof are present.
This will be evaluated once per run, and then cached.
"""
has_key = bool(getattr(settings, "NEVERCACHE_KEY", ""))
return (has_key and settings.CACHES and not settings.TESTING
and middlewares_or_subclasses_installed([
"mezzanine.core.middleware.UpdateCacheMiddleware",
"mezzanine.core.middleware.FetchFromCacheMiddleware",
]))
def has_site_permission(user):
"""
Checks if a staff user has staff-level access for the current site.
The actual permission lookup occurs in ``SitePermissionMiddleware``
which then marks the request with the ``has_site_permission`` flag,
so that we only query the db once per request, so this function
serves as the entry point for everything else to check access. We
also fall back to an ``is_staff`` check if the middleware is not
installed, to ease migration.
"""
if not middlewares_or_subclasses_installed([SITE_PERMISSION_MIDDLEWARE]):
return user.is_staff and user.is_active
return getattr(user, "has_site_permission", False)
def has_site_permission(user):
"""
Checks if a staff user has staff-level access for the current site.
The actual permission lookup occurs in ``SitePermissionMiddleware``
which then marks the request with the ``has_site_permission`` flag,
so that we only query the db once per request, so this function
serves as the entry point for everything else to check access. We
also fall back to an ``is_staff`` check if the middleware is not
installed, to ease migration.
"""
if not middlewares_or_subclasses_installed([SITE_PERMISSION_MIDDLEWARE]):
return user.is_staff and user.is_active
return getattr(user, "has_site_permission", False)
def cache_installed():
"""
Returns ``True`` if a cache backend is configured, and the
cache middleware classes or subclasses thereof are present.
This will be evaluated once per run, and then cached.
"""
has_key = bool(getattr(settings, "NEVERCACHE_KEY", ""))
return (has_key and settings.CACHES and not settings.TESTING and
middlewares_or_subclasses_installed([
"mezzanine.core.middleware.UpdateCacheMiddleware",
"mezzanine.core.middleware.FetchFromCacheMiddleware",
]))
def installed(cls):
"""
Used in ``mezzanine.pages.views.page`` to ensure
``PageMiddleware`` or a subclass has been installed. We cache
the result on the ``PageMiddleware._installed`` to only run
this once.
"""
try:
return cls._installed
except AttributeError:
name = "mezzanine.pages.middleware.PageMiddleware"
installed = middlewares_or_subclasses_installed([name])
setattr(cls, "_installed", installed)
return installed
def installed(cls):
"""
Used in ``mezzanine.pages.views.page`` to ensure
``PageMiddleware`` or a subclass has been installed. We cache
the result on the ``PageMiddleware._installed`` to only run
this once.
"""
try:
return cls._installed
except AttributeError:
name = "mezzanine.pages.middleware.PageMiddleware"
installed = middlewares_or_subclasses_installed([name])
setattr(cls, "_installed", installed)
return installed
def csrf_middleware_installed():
csrf_mw_name = "django.middleware.csrf.CsrfViewMiddleware"
return middlewares_or_subclasses_installed([csrf_mw_name])
def csrf_middleware_installed():
csrf_mw_name = "django.middleware.csrf.CsrfViewMiddleware"
return middlewares_or_subclasses_installed([csrf_mw_name])
