Python学习 网络编程(五) FTP连接

Python里面的FTP连接,主要依赖ftplib这个模块,具体请看帮助文档。

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#!/usr/bin/env python
#FTP下载程序
import ftplib
import os
import socket
HOST = 'ftp.mozilla.org'
DIR = 'pub/mozilla.org/webtools'
FILE = 'bugzilla-LATEST.tar.gz'
def ftpDownload() :
try:
f = ftplib.FTP(HOST)
except (socket.error, socket.gaierror), e:
print 'ERROR: cannot connect "%s"' % HOST
return
print '>>Connect to host "%s"' % HOST
try:
f.login()
except ftplib.error_perm:
print 'ERROR: cannot login anonymously'
f.quit()
return
print '>>Logged in as "anonymous"'
try:
f.cwd(DIR)
except ftplib.error_perm:
print 'ERROR: cannot go to "%s"' % DIR
f.quit()
return
print '>>Go to "%s"' % DIR
try:
f.retrbinary('RETR %s' % FILE,
open(FILE, 'wb').write)
except ftplib.error_perm:
print 'ERROR: cannot read file "%s"' % FILE
os.unlink(FILE)
else:
print '>>Download "%s"' % FILE
f.quit()
return
def main() :
ftpDownload()
if __name__ == '__main__':
main()
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