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72 lines
2.3 KiB
72 lines
2.3 KiB
import json
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from channels.generic.websocket import JsonWebsocketConsumer
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from django.core.cache import cache
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from common.db.utils import safe_db_connection
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from common.utils import get_logger
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from .signal_handlers import new_site_msg_chan
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from .site_msg import SiteMessageUtil
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logger = get_logger(__name__)
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WS_SESSION_KEY = 'ws_session_key'
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class SiteMsgWebsocket(JsonWebsocketConsumer):
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sub = None
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refresh_every_seconds = 10
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def connect(self):
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user = self.scope["user"]
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if user.is_authenticated:
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self.accept()
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session = self.scope['session']
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redis_client = cache.client.get_client()
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redis_client.sadd(WS_SESSION_KEY, session.session_key)
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self.sub = self.watch_recv_new_site_msg()
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else:
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self.close()
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def receive(self, text_data=None, bytes_data=None, **kwargs):
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data = json.loads(text_data)
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refresh_every_seconds = data.get('refresh_every_seconds')
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try:
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refresh_every_seconds = int(refresh_every_seconds)
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except Exception as e:
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logger.error(e)
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return
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if refresh_every_seconds > 0:
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self.refresh_every_seconds = refresh_every_seconds
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def send_unread_msg_count(self):
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user_id = self.scope["user"].id
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unread_count = SiteMessageUtil.get_user_unread_msgs_count(user_id)
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logger.debug('Send unread count to user: {} {}'.format(user_id, unread_count))
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self.send_json({'type': 'unread_count', 'unread_count': unread_count})
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def watch_recv_new_site_msg(self):
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ws = self
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user_id = str(self.scope["user"].id)
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# 先发一个消息再说
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with safe_db_connection():
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self.send_unread_msg_count()
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def handle_new_site_msg_recv(msg):
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users = msg.get('users', [])
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logger.debug('New site msg recv, message users: {}'.format(users))
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if user_id in users:
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ws.send_unread_msg_count()
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return new_site_msg_chan.subscribe(handle_new_site_msg_recv)
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def disconnect(self, code):
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if not self.sub:
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return
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self.sub.unsubscribe()
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session = self.scope['session']
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redis_client = cache.client.get_client()
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redis_client.srem(WS_SESSION_KEY, session.session_key)
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