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）
importsocket
importsys
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")
forlineinfd.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InternetSocket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
pythonclient.pyquux.org/
显示
iWelcometogopheratquux.org!fake(NULL)0 ifake(NULL)0 iThisserverhasalotofinformationofhistoricinterest,fake(NULL)0 ifunny,orjustplainentertaining--allpresentedinGopher.fake(NULL)0 iTherearemanymirrorshereofrareorvaluablefileswiththefake(NULL)0 iaimtopreservethemincasetheirhostdisappears.PLEASEREADfake(NULL)0 i"AboutThisServer"FORIMPORTANTNOTESANDLEGALINFORMATION.fake(NULL)0 ifake(NULL)0 0AboutThisServer/AboutThisServer.txtgopher.quux.org70+ 1Archives/Archivesgopher.quux.org70+ 1Books/Booksgopher.quux.org70+ 1Communication/Communicationgopher.quux.org70+ iThisdirectorycontainstheentiretextofthebookfake(NULL)0 i"WetheMedia:GrassrootsJournalismbythePeople,forthePeople"fake(NULL)0 ibyDanGillmorinvariousformats.fake(NULL)0 ifake(NULL)0 iFeelfreetodownloadandenjoy.fake(NULL)0 1Computers/Computersgopher.quux.org70+ 1CurrentIssuesandEvents(UpdatedApr.23,2002)/Currentgopher.quux.org70+ 1DevelopmentProjects/develgopher.quux.org70+ 0Gopher's10thAnniversary/3.0.0.txtgopher.quux.org70 1Government,Politics,Law,andConflict/Governmentgopher.quux.org70+ 0HowToHelp/HowToHelp.txtgopher.quux.org70+ 1HumorandFun/HumorandFungopher.quux.org70+ 1IndextoQuux.Org/Archives/indexgopher.quux.org70 1Internet/Internetgopher.quux.org70+ 1OtherGopherServers/Software/Gopher/serversgopher.quux.org70 1People/Peoplegopher.quux.org70+ 1Reference/Referencegopher.quux.org70+ 1SoftwareandDownloads/Softwaregopher.quux.org70+ 1TheGopherProject/Software/Gophergopher.quux.org70 0What'sNew/whatsnew.txtgopher.quux.org70+
二、服务端（server.py）
#coding:utf-8
importsocket
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"Serverisrunningonport%d;pressCtrl-Ctoterminate."%port
while1:
clientsock,clientaddr=s.accept()
clientfile=clientsock.makefile('rw',0)
clientfile.write("Welcome,"+str(clientaddr)+"\n")
clientfile.write("Pleaseenterastring:")
line=clientfile.readline().strip()
clientfile.write("Youentered%dcharacters.\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
pythonserver.py
另开一个终端，连接localhost的51421端口。
jihite@ubuntu:~/web$telnetlocalhost51421
Trying127.0.0.1...
Connectedtolocalhost.
Escapecharacteris'^]'.
Welcome,('127.0.0.1',59853)
Pleaseenterastring:mm
Youentered2characters.
Connectionclosedbyforeignhost.
更多关于Python相关内容感兴趣的读者可查看本站专题：《PythonSocket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。