Python's approach to using Ftplib to implement simple FTP clients

This article illustrates how Python uses Ftplib to implement a simple FTP client. Share to everyone for your reference. The implementation methods are as follows:

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#!/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, showing details Fine Information Ftp.connect ("IP", "Port") #连接的ftp Sever and Port Ftp.login ("User", "password") #连接的用户名, password 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) # Turn off debug mode 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.de lete (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

An FTP complete instance:

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#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= '): Self.ftp.set_debuglevel (2) #打开调试级别2, displays details #self. ftp.s ET_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) pr int Self.ftp.welcome def DownLoadFile (self, LocalFile, remotefile): File_handler = open (LocalFile, ' WB ') self.ftp.retr Binary ("RETR%s"% ( RemoteFile), File_handler.write) File_handler.close () return True def uploadfile (self, LocalFile, remotefile): If OS.P Ath.isfile (localfile) = = False:return False file_handler = open (LocalFile, "RB") Self.ftp.storbinary (' STOR%s '%remot Efile, File_handler, 4096) File_handler.close () return True def uploadfiletree (self, Localdir, Remotedir): If os.path.i Sdir (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 Remotenam es: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 and ' <dir> ' in Result:self.bIsDir = True def isdir (self, path): Self.bisdir = False Self.path = P Ath #this ues callback function, that'll change Bisdir value self.ftp.retrlines (' LIST ', self.show) return Self.bisdir def close (self): self.ftp.quit () FTP = myftp (' ******** ') ftp.login (' * * *, ' * * * *) #ftp. DownLoadFile (' * * *. TXT ', ' Othersruntime.log ') #ok #ftp. UploadFile (' Runtime.log ', ' otheRsruntime.log ') #ok #ftp. Downloadfiletree (' BCD ', ' othersabc ') #ok #ftp. Uploadfiletree (' AAA ', "others") Ftp.close () print "ok!"

I hope this article will help you with your Python programming.