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84 lines
3.4 KiB
84 lines
3.4 KiB
4 months ago
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import asyncio
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import time
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import uuid
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from typing import List, Dict
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from fastapi.websockets import WebSocket
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from starlette.websockets import WebSocketState
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from websockets.exceptions import ConnectionClosedOK, ConnectionClosedError
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class ConnectionManager:
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def __init__(self):
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self.active_connections: List[WebSocket] = []
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self.unacknowledged_messages: Dict[str, Dict[str, any]] = {}
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async def connect(self, websocket: WebSocket):
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await websocket.accept()
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self.active_connections.append(websocket)
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def disconnect(self, websocket: WebSocket):
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if websocket in self.active_connections:
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self.active_connections.remove(websocket)
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async def broadcast_stream(self, data: bytes):
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for connection in self.active_connections:
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try:
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await connection.send_bytes(data)
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except (ConnectionClosedError, ConnectionClosedOK):
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self.disconnect(connection)
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async def broadcast_json(self, event: str, data: str):
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for connection in self.active_connections:
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try:
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await connection.send_json({"event": event, "data": data})
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except (ConnectionClosedError, ConnectionClosedOK):
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self.disconnect(connection)
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async def send_message(self, event: str, data: str, message_id:str = None):
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if message_id is None:
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message_id = str(uuid.uuid4())
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try:
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for connection in self.active_connections:
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if connection.client_state == WebSocketState.CONNECTED:
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await connection.send_json({"event": event, "data": data, "message_id": message_id})
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if message_id not in self.unacknowledged_messages:
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self.unacknowledged_messages[message_id] = {
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"message": {"event": event, "data": data, "message_id": message_id},
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"timestamp": time.time(),
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"websocket": connection
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}
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except (ConnectionClosedError, ConnectionClosedOK):
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self.disconnect(connection)
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async def handle_acknowledgment(self, message_id: str):
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if message_id in self.unacknowledged_messages:
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del self.unacknowledged_messages[message_id]
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async def check_unacknowledged_messages(self):
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while True:
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for message_id, message_info in list(self.unacknowledged_messages.items()):
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current_time = time.time()
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if current_time - message_info["timestamp"] > 5: # 设置超时时间为5秒
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await self.send_message(
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message_info["message"]["event"],
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message_info["message"]["data"],
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message_info["message"]["message_id"]
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)
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await asyncio.sleep(3) # 等待一段时间再次检查
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async def handle_message(self, message:str):
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message_id = message
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if message_id is not None:
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await self.handle_acknowledgment(message_id)
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async def start_message_check(self):
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self.message_check_task = asyncio.create_task(self.check_unacknowledged_messages())
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async def stop_message_check(self):
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if hasattr(self, 'message_check_task'):
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self.message_check_task.cancel()
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try:
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await self.message_check_task
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except asyncio.CancelledError:
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pass
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manager = ConnectionManager()
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