Python网络编程之TCP与UDP协议套接字用法示例

#!/usr/bin/env python
from socket import *
from time import ctime
HOST = ''
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM) ##创建服务器TCP套接字
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)
while True:
  print 'waiting for connection...'
  tcpCliSock, addr = tcpSerSock.accept() ##等待客户端连接
  print '...connected from:', addr
  while True:
    data = tcpCliSock.recv(BUFSIZ) ##监听客户端是否发送消息
    if not data:
      break
    tcpCliSock.send('[%s] %s' % (
      ctime(), data))
  tcpCliSock.close()
tcpSerSock.close()

#!/usr/bin/env python
from socket import *
HOST = 'localhost'
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)
tcpCliSock = socket(AF_INET, SOCK_STREAM)  ##创建客户端TCP套接字
tcpCliSock.connect(ADDR) ##连接服务器
while True:
  data = raw_input('> ')
  if not data:
    break
  tcpCliSock.send(data)
  data = tcpCliSock.recv(BUFSIZ) ##监听客户端发送消息
  if not data:
    break
  print data
tcpCliSock.close()

#!/usr/bin/env python
from socket import *
from time import ctime
HOST = ''
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)
udpSerSock = socket(AF_INET, SOCK_DGRAM)
udpSerSock.bind(ADDR)
while True:
  print 'waiting for message...'
  data, addr = udpSerSock.recvfrom(BUFSIZ)##监听并接受客户端发的消息
  udpSerSock.sendto('[%s] %s' % (  ##给消息加上时间戳并返回给客户端
    ctime(), data), addr)
  print '...received from and returned to:', addr
udpSerSock.close()

#!/usr/bin/env python
from socket import *
HOST = 'localhost'
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)
udpCliSock = socket(AF_INET, SOCK_DGRAM)
while True:
  data = raw_input('> ')
  if not data:
    break
  udpCliSock.sendto(data, ADDR) ##给服务器发送数据
  data, ADDR = udpCliSock.recvfrom(BUFSIZ) ##客户端接受带时间戳的数据
  if not data:
    break
  print data
udpCliSock.close()