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# -*- coding: utf-8 -*-
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#
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import json
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import threading
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from django.dispatch import receiver
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from django.db.models.signals import post_save, pre_save
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from django.utils.functional import LazyObject
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from jumpserver.utils import current_request
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from common.decorator import on_transaction_commit
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from common.utils import get_logger, ssh_key_gen
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from common.utils.connection import RedisPubSub
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from common.db.utils import close_old_connections
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from common.signals import django_ready
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from .models import Setting
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logger = get_logger(__file__)
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def get_settings_pub_sub():
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return RedisPubSub('settings')
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class SettingSubPub(LazyObject):
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def _setup(self):
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self._wrapped = get_settings_pub_sub()
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setting_pub_sub = SettingSubPub()
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@receiver(post_save, sender=Setting)
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@on_transaction_commit
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def refresh_settings_on_changed(sender, instance=None, **kwargs):
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if not instance:
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return
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setting_pub_sub.publish(instance.name)
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# 配置变化: PERM_SINGLE_ASSET_TO_UNGROUP_NODE
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if instance.name == 'PERM_SINGLE_ASSET_TO_UNGROUP_NODE':
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# 清除所有用户授权树已构建的标记，下次访问重新生成
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logger.debug('Clean ALL User perm tree built mark')
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from perms.utils.asset import UserGrantedTreeRefreshController
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UserGrantedTreeRefreshController.clean_all_user_tree_built_mark()
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@receiver(django_ready)
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def on_django_ready_add_db_config(sender, **kwargs):
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Setting.refresh_all_settings()
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@receiver(django_ready)
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def auto_generate_terminal_host_key(sender, **kwargs):
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try:
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if Setting.objects.filter(name='TERMINAL_HOST_KEY').exists():
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return
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private_key, public_key = ssh_key_gen()
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value = json.dumps(private_key)
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Setting.objects.create(name='TERMINAL_HOST_KEY', value=value)
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except:
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pass
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@receiver(pre_save, dispatch_uid="my_unique_identifier")
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def on_create_set_created_by(sender, instance=None, **kwargs):
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if getattr(instance, '_ignore_auto_created_by', False) is True:
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return
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if not hasattr(instance, 'created_by') or instance.created_by:
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return
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if current_request and current_request.user.is_authenticated:
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user_name = current_request.user.name
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if isinstance(user_name, str):
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user_name = user_name[:30]
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instance.created_by = user_name
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@receiver(django_ready)
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def subscribe_settings_change(sender, **kwargs):
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logger.debug("Start subscribe setting change")
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def keep_subscribe_settings_change():
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while True:
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try:
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sub = setting_pub_sub.subscribe()
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msgs = sub.listen()
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# 开始之前关闭连接，因为server端可能关闭了连接，而 client 还在 CONN_MAX_AGE 中
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close_old_connections()
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for msg in msgs:
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if msg["type"] != "message":
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continue
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item = msg['data'].decode()
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logger.debug("Found setting change: {}".format(str(item)))
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Setting.refresh_item(item)
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except Exception as e:
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logger.exception(f'subscribe_settings_change: {e}')
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Setting.refresh_all_settings()
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finally:
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close_old_connections()
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t = threading.Thread(target=keep_subscribe_settings_change)
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t.daemon = True
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t.start()
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