初次链接会显示 欢迎
import asyncio
import websockets
async def echo(websocket, path):
# 发送 welcome 消息
await websocket.send("welcome")
async for message in websocket:
await websocket.send(message)
start_server = websockets.serve(echo, "localhost", 8765)
asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()