Python's socket programming

Currently in the Learning Python stage, yesterday saw the Python socket module, respectively, TCP, UDP timestamp echo.

1. TCP Communication Server and client code

# tcpserver.py#!/usr/bin/python#-*-coding:utf-8-*-from Socket import *from time import ctimehost = ' PORT = 21156BUFSI ZE = 1024ADDR = (host,port) Tcpserversock = socket (af_inet,sock_stream) tcpserversock.bind (ADDR) Tcpserversock.listen (5 While True:print ' Waiting for connection ... ' tcpclientsock, addr = tcpserversock.accept () print ' ... connected from: ', Addrwhile True:data=tcpclientsock.recv (BUFSIZE) if not data:breaktcpClientSock.send (' [%s]%s '% (CTime (), data)) Tcpclientsock.close () Tcpserversock.close

# tcpclient.py#!/usr/bin/python#-*-coding:utf-8-*-from socket import *host = ' localhost ' PORT = 21156BUFSIZE = 1024ADDR = (host,port) Tcpclientsock = socket (af_inet,sock_stream) Tcpclientsock.connect (ADDR) while true:data = Raw_input (' > ' If not data:breaktcpClientSock.send (data) data = TCPCLIENTSOCK.RECV (BUFSIZE) if not data:breakprint Datatcpclientsock.close ()

2. UDP Communication Server and client code

 #udpServer .py#!/usr/bin/python# -*-  coding: utf-8 -*-from socket import *from time import ctimehost =   ' port = 21156bufsize = 1024addr =  (host,port) udpserversock =  Socket (Af_inet,sock_dgram) udpserversock.bind (ADDR) while true:print  ' Waiting for message ... ' Data ,addr = udpserversock.recvfrom (BUFSIZE) udpserversock.sendto (' [%s] %s '  %  ( CTime (), data),  addr) print  ' ... received from and returned to: ',addr  Tcpclientsock.close () Tcpserversock.close 

#udpClient. py#!/usr/bin/python#-*-coding:utf-8-*-from socket import *# from time import ctimehost = ' localhost ' PORT = 21156BUFSIZE = 1024ADDR = (host,port) Udpclientsock = socket (af_inet,sock_dgram) while true:data = Raw_input (' > ') if not Data:breakudpClientSock.sendto (data,addr) data,addr = Udpclientsock.recvfrom (BUFSIZE) if not data:breakprint Dataudpclientsock.close ()

Python's socket programming