77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
"""WebSocket 连接管理器"""
|
|
|
|
import json
|
|
from datetime import datetime, timezone
|
|
from typing import Dict, Set
|
|
|
|
from fastapi import WebSocket
|
|
|
|
|
|
class ConnectionManager:
|
|
"""管理所有 WebSocket 连接"""
|
|
|
|
def __init__(self):
|
|
# user_id -> set of WebSocket connections (一个用户可能有多个标签页)
|
|
self.active_connections: Dict[str, Set[WebSocket]] = {}
|
|
|
|
async def connect(self, websocket: WebSocket, user_id: str):
|
|
"""接受新连接"""
|
|
await websocket.accept()
|
|
if user_id not in self.active_connections:
|
|
self.active_connections[user_id] = set()
|
|
self.active_connections[user_id].add(websocket)
|
|
|
|
def disconnect(self, websocket: WebSocket, user_id: str):
|
|
"""断开连接"""
|
|
if user_id in self.active_connections:
|
|
self.active_connections[user_id].discard(websocket)
|
|
if not self.active_connections[user_id]:
|
|
del self.active_connections[user_id]
|
|
|
|
async def send_to_user(self, user_id: str, event_type: str, data: dict):
|
|
"""向指定用户发送事件"""
|
|
if user_id not in self.active_connections:
|
|
return
|
|
|
|
message = json.dumps({
|
|
"type": event_type,
|
|
"data": data,
|
|
"timestamp": datetime.utcnow().isoformat(),
|
|
}, ensure_ascii=False, default=str)
|
|
|
|
disconnected = set()
|
|
for ws in self.active_connections[user_id]:
|
|
try:
|
|
await ws.send_text(message)
|
|
except Exception:
|
|
disconnected.add(ws)
|
|
|
|
# 清理断开的连接
|
|
for ws in disconnected:
|
|
self.active_connections[user_id].discard(ws)
|
|
|
|
async def broadcast_to_conversation(self, user_ids: list[str],
|
|
event_type: str, data: dict,
|
|
exclude_user: str | None = None):
|
|
"""向会话中所有用户广播事件"""
|
|
for uid in user_ids:
|
|
if uid != exclude_user:
|
|
await self.send_to_user(uid, event_type, data)
|
|
|
|
async def broadcast(self, event_type: str, data: dict):
|
|
"""向所有在线用户广播"""
|
|
for user_id in list(self.active_connections.keys()):
|
|
await self.send_to_user(user_id, event_type, data)
|
|
|
|
def is_online(self, user_id: str) -> bool:
|
|
"""检查用户是否在线"""
|
|
return user_id in self.active_connections and len(self.active_connections[user_id]) > 0
|
|
|
|
def get_online_user_ids(self) -> list[str]:
|
|
"""获取所有在线用户 ID"""
|
|
return list(self.active_connections.keys())
|
|
|
|
|
|
# 全局单例
|
|
manager = ConnectionManager()
|