Python使用ftplib实现简易FTP客户端的方法

#!/usr/bin/python 
#-*- coding:utf-8 -*- 
from ftplib import FTP   #加载ftp模块 
ftp=FTP()          #设置变量 
ftp.set_debuglevel(2)    #打开调试级别2，显示详细信息 
ftp.connect("IP","port")  #连接的ftp sever和端口 
ftp.login("user","password")#连接的用户名，密码 
print ftp.getwelcome()   #打印出欢迎信息 
ftp.cmd("xxx/xxx")     #更改远程目录 
bufsize=1024        #设置的缓冲区大小 
filename="filename.txt"   #需要下载的文件 
file_handle=open(filename,"wb").write
#以写模式在本地打开文件 
ftp.retrbinaly("RETR filename.txt",file_handle,bufsize)
#接收服务器上文件并写入本地文件 
ftp.set_debuglevel(0)    #关闭调试模式 
ftp.quit          #退出ftp 
ftp.dir()          #显示目录下文件信息 
ftp.mkd(pathname)      #新建远程目录 
ftp.pwd()          #返回当前所在位置 
ftp.rmd(dirname)      #删除远程目录 
ftp.delete(filename)    #删除远程文件 
ftp.rename(fromname, toname)#将fromname修改名称为toname。 
ftp.storbinaly("STOR filename.txt",file_handel,bufsize) #上传目标文件

#coding:utf-8 
from ctypes import * 
import os 
import sys 
import ftplib 
class myFtp: 
  ftp = ftplib.FTP() 
  bIsDir = False 
  path = "" 
  def __init__(self, host, port='21'): 
    self.ftp.set_debuglevel(2) #打开调试级别2，显示详细信息  
    #self.ftp.set_pasv(0)  #0主动模式 1 #被动模式 
    self.ftp.connect( host, port ) 
  def Login(self, user, passwd ): 
    self.ftp.login( user, passwd ) 
    print self.ftp.welcome 
  def DownLoadFile( self, LocalFile, RemoteFile ): 
    file_handler = open( LocalFile, 'wb' ) 
    self.ftp.retrbinary( "RETR %s" %( RemoteFile ), file_handler.write )  
    file_handler.close() 
    return True 
  def UpLoadFile( self, LocalFile, RemoteFile ): 
    if os.path.isfile( LocalFile ) == False: 
      return False 
    file_handler = open( LocalFile, "rb" ) 
    self.ftp.storbinary( 'STOR %s'%RemoteFile, file_handler, 4096 )
    file_handler.close() 
    return True 
  def UpLoadFileTree( self, LocalDir, RemoteDir ): 
    if os.path.isdir( LocalDir ) == False: 
      return False 
    LocalNames = os.listdir( LocalDir ) 
    print RemoteDir 
    self.ftp.cwd( RemoteDir ) 
    for Local in LocalNames: 
      src = os.path.join( LocalDir, Local) 
      if os.path.isdir( src ): 
        self.UpLoadFileTree( src, Local ) 
      else: 
        self.UpLoadFile( src, Local ) 
    self.ftp.cwd( ".." ) 
    return 
  def DownLoadFileTree( self, LocalDir, RemoteDir ): 
    if os.path.isdir( LocalDir ) == False: 
      os.makedirs( LocalDir ) 
    self.ftp.cwd( RemoteDir ) 
    RemoteNames = self.ftp.nlst()  
    for file in RemoteNames: 
      Local = os.path.join( LocalDir, file ) 
      if self.isDir( file ): 
        self.DownLoadFileTree( Local, file )         
      else: 
        self.DownLoadFile( Local, file ) 
    self.ftp.cwd( ".." ) 
    return 
  def show( self, list ): 
    result = list.lower().split( " " ) 
    if self.path in result and "<dir>" in result: 
      self.bIsDir = True 
  def isDir( self, path ): 
    self.bIsDir = False 
    self.path = path 
    #this ues callback function ,that will change bIsDir value 
    self.ftp.retrlines( 'LIST', self.show ) 
    return self.bIsDir 
  def close( self ): 
    self.ftp.quit() 
ftp = myFtp('********') 
ftp.Login('*****','*****') 
#ftp.DownLoadFile('TEST.TXT', 'others\runtime.log')#ok 
#ftp.UpLoadFile('runtime.log', 'others\runtime.log')#ok 
#ftp.DownLoadFileTree('bcd', 'others\abc')#ok 
#ftp.UpLoadFileTree('aaa',"others\" ) 
ftp.close()
print "ok!"