Python簡(jiǎn)單網(wǎng)絡(luò)編程示例【客戶(hù)端與服務(wù)端】

更新時(shí)間：2017年05月26日 11:36:01 作者：jihite

這篇文章主要介紹了Python簡(jiǎn)單網(wǎng)絡(luò)編程,詳細(xì)介紹了客戶(hù)端與服務(wù)端的具體實(shí)現(xiàn)技巧與相關(guān)注意事項(xiàng),需要的朋友可以參考下

本文實(shí)例講述了Python簡(jiǎn)單網(wǎng)絡(luò)編程。分享給大家供大家參考，具體如下：

內(nèi)容目錄

1. 客戶(hù)端（client.py）
2. 服務(wù)端（server.py）

一、客戶(hù)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)

程序通過(guò)socket.socket()建立一個(gè)Socket，參數(shù)告訴系統(tǒng)需要一個(gè)Internet Socket進(jìn)行TCP通信。接著程序鏈接遠(yuǎn)程的主機(jī)名，并提供文件名。最后獲得響應(yīng)后在屏幕上打印出來(lái)。

測(cè)試

python client.py quux.org /

顯示

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、服務(wù)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)        #每次最多只有一個(gè)等候處理
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()

建立一個(gè)socket，設(shè)置成可復(fù)用的（reusable），綁定端口號(hào)51421（可選大于1024的任一值），調(diào)用listen（）函數(shù)，開(kāi)始等待來(lái)自客戶(hù)端的請(qǐng)求，同時(shí)設(shè)定最多只有一個(gè)等候處理的鏈接。

主循環(huán)對(duì)a.accept（）函數(shù)調(diào)用開(kāi)始，程序連接一個(gè)客戶(hù)端后立馬停止，接收用戶(hù)的輸入。

運(yùn)行一個(gè)例子

首先運(yùn)行server.py

python server.py

另開(kāi)一個(gè)終端，連接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.

更多關(guān)于Python相關(guān)內(nèi)容感興趣的讀者可查看本站專(zhuān)題：《Python Socket編程技巧總結(jié)》、《Python函數(shù)使用技巧總結(jié)》、《Python字符串操作技巧匯總》、《Python入門(mén)與進(jìn)階經(jīng)典教程》及《Python文件與目錄操作技巧匯總》

希望本文所述對(duì)大家Python程序設(shè)計(jì)有所幫助。

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