Python Core programming (Network programming)

1. Python socket module built-in method

2, the TCP server pseudo-code

3. TCP Client Pseudo-code

4. Socket Module Properties

5. A simple TCP client and service-side code:

# encoding:utf-8from Socket Import *from time import ctimefrom datetime import *# define TCPServer listening port number host = ' 0.0.0.0 ' port = 2 1567ADDR = (HOST, PORT) buffsize=1024# Initializes a TCP Sockettcpsvrsock = socket (af_inet, Sock_stream) tcpsvrsock.bind (ADDR) Tcpsvrsock.listen (5) while True:    the Print (' [%s] wait for connection ... '% (DateTime.Now ()))    Tcpclientsock, CLIENTADDR = tcpsvrsock.accept ()    print (' [%s] connect from:%s ... '% (DateTime.Now (), clientaddr)) while    True:        recievedata = tcpclientsock.recv (buffsize)        if not recievedata:            break        print (' [%s] received message:%s '% ( DateTime.Now (), Recievedata.decode (' Utf-8 '))        senddata = input (' > ')        if not senddata:        break Tcpclientsock.send (Bytes (senddata, ' utf-8 '))    tcpclientsock.close () tcpsvrsock.close ()

　　

　　

Client code:

# encoding:utf-8from Socket Import *from datetime import *host = ' 127.0.0.1 ' port = 21567ADDR = (HOST, PORT) buffsize=1024cl Ientsocket=socket (Af_inet,sock_stream) clientsocket.connect (ADDR) while True:    senddata=input (' > ')    if Not senddata:        break    senddata=bytes (senddata, ' utf-8 ')    clientsocket.send (senddata)    recievedata= CLIENTSOCKET.RECV (buffsize)    if not recievedata:        break    print (Recievedata.decode (' Utf-8 ')) Clientsocket.close ()

　　

Python Core programming (Network programming)