最近又回顾了下Websocket，发现已经忘的七七八八了。于是用js写了客户端，用python写了服务端，来复习一下这方面的知识。
2、先看一下效果吧 2.1、效果1（一个客户端连上服务的并发送消息）2.2、效果2（另一个客户端连上服务的并发送消息）
2.4、效果4（一个客户端掉线并不影响其它socket连接）
2.5、效果5（列取全部连接客户端对象和当前发消息的客户端对象）
3、核心代码 3.1、Python
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#! -*- coding: utf-8 -*-
"""
Author: ZhenYuSha
Create Time: 2019-1-14
Info: Websocket 的使用示例
"""
import asyncio
import websockets
websocket_users = set()
# 检测客户端权限，用户名密码通过才能退出循环
async def check_user_permit(websocket):
print("new websocket_users:", websocket)
websocket_users.add(websocket)
print("websocket_users list:", websocket_users)
while True:
recv_str = await websocket.recv()
cred_dict = recv_str.split(":")
if cred_dict[0] == "admin" and cred_dict[1] == "123456":
response_str = "Congratulation, you have connect with server..."
await websocket.send(response_str)
print("Password is ok...")
return True
else:
response_str = "Sorry, please input the username or password..."
print("Password is wrong...")
await websocket.send(response_str)
# 接收客户端消息并处理，这里只是简单把客户端发来的返回回去
async def recv_user_msg(websocket):
while True:
recv_text = await websocket.recv()
print("recv_text:", websocket.pong, recv_text)
response_text = f"Server return: {recv_text}"
print("response_text:", response_text)
await websocket.send(response_text)
# 服务器端主逻辑
async def run(websocket, path):
while True:
try:
await check_user_permit(websocket)
await recv_user_msg(websocket)
except websockets.ConnectionClosed:
print("ConnectionClosed...", path) # 链接断开
print("websocket_users old:", websocket_users)
websocket_users.remove(websocket)
print("websocket_users new:", websocket_users)
break
except websockets.InvalidState:
print("InvalidState...") # 无效状态
break
except Exception as e:
print("Exception:", e)
if __name__ == '__main__':
print("127.0.0.1:8181 websocket...")
asyncio.get_event_loop().run_until_complete(websockets.serve(run, "127.0.0.1", 8181))
asyncio.get_event_loop().run_forever()