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jumpserver/apps/settings/models.py

97 lines
2.7 KiB

import json
from django.db import models
from django.db.utils import ProgrammingError, OperationalError
from django.utils.translation import ugettext_lazy as _
from django.core.cache import cache
from common.utils import signer
class SettingQuerySet(models.QuerySet):
def __getattr__(self, item):
queryset = list(self)
instances = [i for i in queryset if i.name == item]
if len(instances) == 1:
return instances[0]
else:
return Setting()
class SettingManager(models.Manager):
def get_queryset(self):
return SettingQuerySet(self.model, using=self._db)
class Setting(models.Model):
name = models.CharField(max_length=128, unique=True, verbose_name=_("Name"))
value = models.TextField(verbose_name=_("Value"))
category = models.CharField(max_length=128, default="default")
encrypted = models.BooleanField(default=False)
enabled = models.BooleanField(verbose_name=_("Enabled"), default=True)
comment = models.TextField(verbose_name=_("Comment"))
objects = SettingManager()
cache_key_prefix = '_SETTING_'
def __str__(self):
return self.name
@classmethod
def get(cls, item):
cached = cls.get_from_cache(item)
if cached is not None:
return cached
instances = cls.objects.filter(name=item)
if len(instances) == 1:
s = instances[0]
s.refresh_setting()
return s.cleaned_value
return None
@classmethod
def get_from_cache(cls, item):
key = cls.cache_key_prefix + item
cached = cache.get(key)
return cached
@property
def cleaned_value(self):
try:
value = self.value
if self.encrypted:
value = signer.unsign(value)
if not value:
return None
value = json.loads(value)
return value
except json.JSONDecodeError:
return None
@cleaned_value.setter
def cleaned_value(self, item):
try:
v = json.dumps(item)
if self.encrypted:
v = signer.sign(v)
self.value = v
except json.JSONDecodeError as e:
raise ValueError("Json dump error: {}".format(str(e)))
@classmethod
def refresh_all_settings(cls):
try:
settings_list = cls.objects.all()
for setting in settings_list:
setting.refresh_setting()
except (ProgrammingError, OperationalError):
pass
def refresh_setting(self):
key = self.cache_key_prefix + self.name
cache.set(key, self.cleaned_value, None)
class Meta:
db_table = "settings_setting"
verbose_name = _("Setting")