编写Python脚本来实现最简单的FTP下载的教程
编写Python脚本来实现最简单的FTP下载的教程
发布时间:2016-12-28 来源:查字典编辑
摘要: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(...

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!)

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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