57 lines
2.2 KiB
Python
57 lines
2.2 KiB
Python
import logging
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from json.decoder import JSONDecodeError
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from json import loads as json_loads
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from json import dumps as json_dumps
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from channels.generic.websocket import AsyncWebsocketConsumer
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class NotifyConsumer(AsyncWebsocketConsumer):
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def __init__(self, *args, **kwargs):
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super().__init__(args, kwargs)
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self.log = logging.getLogger("server.log")
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self.room_group_name = "general"
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async def connect(self):
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# Join room group
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await self.channel_layer.group_add(self.room_group_name, self.channel_name)
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self.log.info(f"Added {self.channel_name} channel to {self.room_group_name} group")
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await self.accept()
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async def disconnect(self, close_code):
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# Leave room group
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await self.channel_layer.group_discard(self.room_group_name, self.channel_name)
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# Receive message from WebSocket
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async def receive(self, text_data=None, bytes_data=None):
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self.log.info(f"Received message: {text_data}")
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try:
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text_data_json = json_loads(text_data)
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message = text_data_json["message"]
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# Send message to room group
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await self.channel_layer.group_send(
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self.room_group_name,
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{"type": "generic.event", "message": message, "name": "send_message_to_frontend", "event_id": 1}
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)
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except JSONDecodeError as e:
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await self.send(text_data=json_dumps({"message": "error", "error": "malformed json"}))
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self.log.error(e)
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except KeyError as e:
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await self.send(text_data=json_dumps({"message": "error", "error": f"missing key: {str(e)}"}))
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self.log.error(e)
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except Exception as e:
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await self.send(text_data=json_dumps({"message": "error", "error": "unknown error"}))
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self.log.error(e)
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raise e
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# Receive message from room group
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async def generic_event(self, event):
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self.log.info(f"Received event: {event}")
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message = event["message"]
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name = event["name"]
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event_id = event["event_id"]
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# Send message to WebSocket
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await self.send(text_data=json_dumps({"message": message, "name": name, "event_id": event_id}))
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