Python简单网络编程示例【客户端与服务端】


            本文实例讲述了Python简单网络编程。分享给大家供大家参考，具体如下：

内容目录

1. 客户端（client.py）

2. 服务端（server.py）

一、客户端（client.py）





import socket

import sys

port = 70

host = sys.argv[1]

filename = sys.argv[2]

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect((host, port))

fd = s.makefile("rw", 0)

fd.write(filename + "\n")

for line in fd.readlines():

  sys.stdout.write(line)







程序通过socket.socket()建立一个Socket，参数告诉系统需要一个Internet Socket进行TCP通信。接着程序链接远程的主机名，并提供文件名。最后获得响应后在屏幕上打印出来。

测试





python client.py quux.org /







显示





iWelcome to gopher at quux.org! fake  (NULL) 0

i  fake  (NULL) 0

iThis server has a lot of information of historic interest, fake  (NULL) 0

ifunny, or just plain entertaining -- all presented in Gopher. fake  (NULL) 0

iThere are many mirrors here of rare or valuable files with the fake  (NULL) 0

iaim to preserve them in case their host disappears. PLEASE READ  fake  (NULL) 0

i"About This Server" FOR IMPORTANT NOTES AND LEGAL INFORMATION. fake  (NULL) 0

i  fake  (NULL) 0

0About This Server /About This Server.txt gopher.quux.org 70 +

1Archives  /Archives  gopher.quux.org 70 +

1Books /Books gopher.quux.org 70 +

1Communication /Communication gopher.quux.org 70 +

iThis directory contains the entire text of the book  fake  (NULL) 0

i"We the Media: Grassroots Journalism by the People, for the People"  fake  (NULL) 0

iby Dan Gillmor in various formats. fake  (NULL) 0

i  fake  (NULL) 0

iFeel free to download and enjoy.  fake  (NULL) 0

1Computers /Computers gopher.quux.org 70 +

1Current Issues and Events (Updated Apr. 23, 2002) /Current  gopher.quux.org 70 +

1Development Projects  /devel gopher.quux.org 70 +

0Gopher's 10th Anniversary /3.0.0.txt gopher.quux.org 70

1Government, Politics, Law, and Conflict  /Government gopher.quux.org 70 +

0How To Help  /How To Help.txt  gopher.quux.org 70 +

1Humor and Fun /Humor and Fun gopher.quux.org 70 +

1Index to Quux.Org /Archives/index gopher.quux.org 70

1Internet  /Internet  gopher.quux.org 70 +

1Other Gopher Servers  /Software/Gopher/servers  gopher.quux.org 70

1People /People gopher.quux.org 70 +

1Reference /Reference gopher.quux.org 70 +

1Software and Downloads /Software  gopher.quux.org 70 +

1The Gopher Project /Software/Gopher  gopher.quux.org 70

0What's New /whatsnew.txt  gopher.quux.org 70 +　







二、服务端（server.py）





# coding: utf-8

import socket

host = ''

port = 51421

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

s.bind((host, port))

s.listen(1)        #每次最多只有一个等候处理

print "Server is running on port %d; press Ctrl-C to terminate." %port

while 1:

  clientsock, clientaddr = s.accept()

  clientfile = clientsock.makefile('rw', 0)

  clientfile.write("Welcome, " + str(clientaddr) + "\n")

  clientfile.write("Please enter a string: ")

  line = clientfile.readline().strip()

  clientfile.write("You entered %d characters. \n" %len(line))

  clientfile.close()

  clientsock.close()







建立一个socket，设置成可复用的（reusable），绑定端口号51421（可选大于1024的任一值），调用listen（）函数，开始等待来自客户端的请求，同时设定最多只有一个等候处理的链接。

主循环对a.accept（）函数调用开始，程序连接一个客户端后立马停止，接收用户的输入。

运行一个例子

首先运行server.py





python server.py







另开一个终端，连接localhost的51421端口。　





jihite@ubuntu:~/web$ telnet localhost 51421

Trying 127.0.0.1...

Connected to localhost.

Escape character is '^]'.

Welcome, ('127.0.0.1', 59853)

Please enter a string: mm

You entered 2 characters.

Connection closed by foreign host.







更多关于Python相关内容感兴趣的读者可查看本站专题：《Python Socket编程技巧总结》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总》

希望本文所述对大家Python程序设计有所帮助。