Python之FTP传输-乾颐堂

访问FTP，无非两件事情：upload和download，最近在项目中需要从ftp下载大量文件，然后我就试着去实验自己的ftp操作类，如下（PS：此段有问题，别复制使用，可以参考去试验自己的ftp类！）

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import os from ftplib import FTP     class FTPSync():     def __init__(self, host, usr, psw, log_file):         self.host = host         self.usr = usr         self.psw = psw         self.log_file = log_file             def __ConnectServer(self):         try:             self.ftp = FTP(self.host)             self.ftp.login(self.usr, self.psw)             self.ftp.set_pasv(False)             return True         except Exception:             return False             def __CloseServer(self):         try:             self.ftp.quit()             return True         except Exception:             return False             def __CheckSizeEqual(self, remoteFile, localFile):         try:             remoteFileSize = self.ftp.size(remoteFile)             localFileSize = os.path.getsize(localFile)             if localFileSize == remoteFileSize:                 return True             else:                 return False         except Exception:             return None                 def __DownloadFile(self, remoteFile, localFile):         try:             self.ftp.cwd(os.path.dirname(remoteFile))             f = open(localFile, 'wb')             remoteFileName = 'RETR ' + os.path.basename(remoteFile)             self.ftp.retrbinary(remoteFileName, f.write)                             if self.__CheckSizeEqual(remoteFile, localFile):                 self.log_file.write('The File is downloaded successfully to %s' + '\n' % localFile)                 return True             else:                 self.log_file.write('The localFile %s size is not same with the remoteFile' + '\n' % localFile)                 return False         except Exception:             return False             def __DownloadFolder(self, remoteFolder, localFolder):         try:             fileList = []             self.ftp.retrlines('NLST', fileList.append)             for remoteFile in fileList:                 localFile = os.path.join(localFolder, remoteFile)                 return self.__DownloadFile(remoteFile, localFile)         except Exception:             return False             def SyncFromFTP(self, remoteFolder, localFolder):         self.__DownloadFolder(remoteFolder, localFolder)         self.log_file.close()         self.__CloseServer()

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