Python简单网络编程示例【客户端与服务端】

import socketimport sysport = 70host = 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)

python client.py quux.org /

iWelcome to gopher at quux.org! fake  (NULL) 0i  fake  (NULL) 0iThis server has a lot of information of historic interest, fake  (NULL) 0ifunny, or just plain entertaining -- all presented in Gopher. fake  (NULL) 0iThere are many mirrors here of rare or valuable files with the fake  (NULL) 0iaim to preserve them in case their host disappears. PLEASE READ  fake  (NULL) 0i"About This Server" FOR IMPORTANT NOTES AND LEGAL INFORMATION. fake  (NULL) 0i  fake  (NULL) 00About 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) 0i"We the Media: Grassroots Journalism by the People, for the People"  fake  (NULL) 0iby Dan Gillmor in various formats. fake  (NULL) 0i  fake  (NULL) 0iFeel free to download and enjoy.  fake  (NULL) 01Computers /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 701Government, 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 701Internet  /Internet  gopher.quux.org 70 +1Other Gopher Servers  /Software/Gopher/servers  gopher.quux.org 701People /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 700What's New /whatsnew.txt  gopher.quux.org 70 +　

# coding: utf-8import sockethost = ''port = 51421s = 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." %portwhile 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()

python server.py

jihite@ubuntu:~/web$ telnet localhost 51421Trying 127.0.0.1...Connected to localhost.Escape character is '^]'.Welcome, ('127.0.0.1', 59853)Please enter a string: mmYou entered 2 characters.Connection closed by foreign host.