python实现简单ftp客户端的方法_Python

本文实例讲述了python实现简单ftp客户端的方法。分享给大家供大家参考。具体实现方法如下：

									#!/usr/bin/python

									# -*- coding: utf-8 -*-

									import ftplib

									import os

									import socket

									HOST = 'ftp.mozilla.org'

									DIRN = 'pub/mozilla.org/webtools'

									FILE = 'bugzilla-3.6.9-to-3.6.10-nodocs.diff.gz'

									def writedata(data):

									  f = open(FILE,'wb')

									  try:

									    f.write(data)

									  finally:

									    f.close()

									def main():

									  try:

									    f = ftplib.FTP(HOST)

									  except (socket.error, socket.gaierror):

									    print 'ERROR:cannot reach " %s"' % HOST

									    return

									  print '***Connected to host "%s"' % HOST

									  try:

									    f.login()

									  except ftplib.error_perm:

									    print 'ERROR: cannot login anonymously'

									    f.quit()

									    return

									  print '*** Logged in as "anonymously"'

									  try:

									    f.cwd(DIRN)

									  except ftplib.error_perm:

									    print 'ERRORL cannot CD to "%s"' % DIRN

									    f.quit()

									    return

									  print '*** Changed to "%s" folder' % DIRN

									  try:

									    #传一个回调函数给retrbinary() 它在每接收一个二进制数据时都会被调用

									    f.retrbinary('RETR %s' %FILE, writedata)

									  except ftplib.error_perm:

									    print 'ERROR: cannot read file "%s"' %FILE

									    os.unlink(FILE)

									  else:

									    print '*** Downloaded "%s" to CWD' % FILE

									  f.quit()

									  return

									if __name__ == '__main__':

									  main()

希望本文所述对大家的Python程序设计有所帮助。

python实现简单ftp客户端的方法

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