学习笔记-- Python网络编程

Posted 2020-11-04 银荡的那一夏

TCP编程-- server

 1 import socket, threading, time
 2 
 3 def dealClient(sock, addr):
 4     print(‘Accept new connection from %s:%s...‘ % addr)
 5     sock.send(b‘Hello, I am server!‘)  # 给client端发送数据
 6     while True:
 7         data = sock.recv(1024)  # 接收client发过来的数据
 8         time.sleep(1)
 9         if not data or data.decode(‘utf-8‘) == ‘exit‘:
10             break
11         print(‘-->> %s !‘ % data.decode(‘utf-8‘))
12         sock.send((‘Loop_Msg: %s !‘ % data.decode(‘utf-8‘)).encode())   # 发送数据给client
13     sock.close()
14     print(‘Connection from %s:%s closed‘ % addr)
15 
16 if __name__ == ‘__main__‘:
17     # 创建socket并绑定IP
18     s = socket.socket()
19     s.bind((‘127.0.0.1‘, 9999))
20     s.listen()   # 启用监听
21     print(‘Waiting for connection...‘)
22     while True:
23         sock, addr = s.accept()  # 接收一个新的连接
24         t = threading.Thread(target = dealClient, args = (sock, addr))  #创建新的线程来处理TCP连接
25         t.start()

 

TCP编程-- client

1 import socket
2 
3 s = socket.socket()
4 s.connect((‘127.0.0.1‘, 9999))  # 建立连接
5 print(‘-->>‘ + s.recv(1024).decode(‘utf-8‘)) # 接收消息
6 s.send(b‘Hello, I am a client‘)
7 print(‘-->>‘ + s.recv(1024).decode(‘utf-8‘))
8 s.send(b‘exit‘)  # 发送消息
9 s.close()

 

代码摘自 Python爬虫开发与项目实战--  机械工业出版社