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python中通过ftplib模块实现FTP客户端的方法介绍

python中通过ftplib模块实现FTP客户端是如何来实现的呢?下面的内容将会通过具体的实例来演示python中通过ftplib模块实现FTP客户端的实现方法及相关技巧:

本文实例讲述了Python使用ftplib实现简易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 -*-
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
 

一个FTP完整实例:

#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!"
 


python中通过ftplib模块实现FTP客户端就是这样,欢迎大家参考。。。。

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