python socket网络编程

socket套接字：为了使2个不同应用程序进行通信。

两种套接字类型：基于文件的和基于网络的

1.基于文件(AF_LOCAL或AF_UNIX)：代表Unix

2.面向网络(AF_INET):代表因特网

面向连接的套接字(SOCK_STREAM):TCP

面向无连接的套接字(SOCK_DGRAM):UDP

Python中的网络编程socket()模块

TCP 网络程序

serice服务端

# -*- coding: utf-8 -*-
from socket import *
from time import ctime

HOST = ''  ##为空表示bind()函数可以绑定在所有有效的地址上
PORT=21567
BUFSIZ = 1024  ##缓冲区大小  1K
ADDR = (HOST,PORT)

tcpSerSock = socket(AF_INET,SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)  ##允许最多多少个链接 后来的会被拒绝掉

while True:
    print 'waiting for connection...'
    tcpCliSock,addr = tcpSerSock.accept()  ##阻塞式线程
    print '...connected from:',addr

    while True:
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
            break
        tcpCliSock.send('(%s) %s' % (ctime(),data))
    tcpCliSock.close()
tcpSerSock.close()

client 客户端

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from socket import *
HOST = 'localhost'  ##
PORT=21517
BUFSIZ = 1024  ##缓冲区大小  1K
ADDR = (HOST,PORT)

tcpCliSock = socket(AF_INET,SOCK_STREAM)
tcpCliSock.connect(ADDR)

while True:
    data = raw_input('> ')
    if not data:
        break
    tcpCliSock.send(data)
    data = tcpCliSock.recv(BUFSIZ)
    if not data:
        break
    print data
tcpCliSock.close()

UDP程序 

service 服务端

#!/usr/bin/env python
# -*- coding: utf-8 -*-

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)
    udpSerSock.sendto('[%s] %s' % (ctime(),data),addr)
    print '...received from and returned to:',addr
udpSerSock.close()

client 客户端

#!/usr/bin/env python
# -*- coding: utf-8 -*-

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)
    data,ADDR = udpCliSock.recvfrom(BUFSIZ)
    if not data:
        break
    print data

udpCliSock.close()

SocketService 通讯程序

服务端

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from SocketServer import (TCPServer as TCP,StreamRequestHandler as SRH)
from time import ctime

HOST = ''
PORT = 21569
ADDR = (HOST,PORT)

class MyRequestHandler(SRH):
    def handle(self):
        print '...connected from:',self.client_address
        self.wfile.write('[%s] %s' % (ctime(),self.rfile.readline()))

tcpServ = TCP(ADDR,MyRequestHandler)
print 'waiting for connection...'
tcpServ.serve_forever()

客户端

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from socket import *
HOST = 'localhost'  ##
# HOST = '192.168.0.51'
PORT=21569
BUFSIZ = 1024  ##缓冲区大小  1K
ADDR = (HOST,PORT)

while True:
    tcpCliSock = socket(AF_INET, SOCK_STREAM)
    tcpCliSock.connect(ADDR)
    data = raw_input('> ')
    if not data:
        break
    tcpCliSock.send('%s
' % data)
    data = tcpCliSock.recv(BUFSIZ)
    if not data:
        break
    print data.strip()
    tcpCliSock.close()