python实现简单ftp客户端的方法
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。