Posted in Python onMarch 18, 2020
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。
先看一下python简单聊天工具最终效果
一个客户端连上服务的并发送消息
另一个客户端连上服务的并发送消息
服务的收到客户端的全部消息并返回消息
一个客户端掉线并不影响其它socket连接
列取全部连接客户端对象和当前发消息的客户端对象
先安装websockets
pip install websockets
python简单聊天工具实例源码
Python聊天工具服务端
#! -*- coding: utf-8 -*-
"""
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()
python简单聊天工具客户端代码Html+Js
<!-- Websocket 的使用示例 -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试Socket——ws://127.0.0.1:8181</title>
<script>
var socket;
if ("WebSocket" in window) {
var ws = new WebSocket("ws://127.0.0.1:8181/test");
socket = ws;
ws.onopen = function() {
console.log('连接成功');
alert("连接成功, 请输入账号和密码");
};
ws.onmessage = function(evt) {
var received_msg = evt.data;
document.getElementById("showMes").value+=received_msg+"\n";
};
ws.onclose = function() {
alert("断开了连接");
};
} else {
alert("浏览器不支持WebSocket");
}
function sendMeg(){
var message=document.getElementById("name").value+":"+document.getElementById("mes").value;
document.getElementById("showMes").value+=message+"\n\n";
socket.send(message);
}
</script>
</head>
<body>
<textarea rows="3" cols="30" id="showMes" style="width:300px;height:500px;"></textarea>
<br/>
<label>名称</label>
<input type="text" id="name"/>
<br/>
<label>消息</label>
<input type="text" id="mes"/>
<button onclick="sendMeg();">发送</button>
</body>
</html>
本文主要介绍了python使用Websocket库开发简单聊天工具实例详细，更多关于python Websocket库开发知识请查看下面的相关链接
python开发实例之python使用Websocket库开发简单聊天工具实例详解(python+Websocket+JS)
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