python 实现ftp上传下载
* 脚本需要传入两个参数，参数1为需要从远端ftp站点下载文件名称，参数2为已知需要下载的文件md5值，文件下载完成后会自动进行md5值校验
* 运行示例
[root@vm172-31-16-11 software]# python file.txt 2d6c30dba93eda3f70f662a390d8e49c
1 # -*- coding: utf-8 -*- 2 3 from ftplib import FTP 4 import time 5 import tarfile 6 import os 7 import sys 8 import ftplib 9 import hashlib 10 11 filename = sys.argv[1] 12 localpath = '/data/update/' 13 remotepath = '/server' 14 def ftpconnect(host, username, password): 15 ftp = FTP() 16 # ftp.set_debuglevel(2) 17 ftp.connect(host, 21) 18 ftp.login(username, password) 19 print ftp.welcome 20 return ftp 21 def downloadfile(ftp, filename): 22 if os.path.exists(localpath): 23 pass 24 else: 25 os.makedirs(localpath, 0755) 26 bufsize = 1024 27 ftp.cwd(remotepath) 28 ftp.dir() 29 fp = open(localpath + filename,'wb') 30 ftp.retrbinary('RETR %s' % os.path.basename(filename), fp.write, bufsize) 31 fp.close() 32 33 def getFileMD5(): 34 filepath = localpath + filename 35 if os.path.exists(filepath): 36 f = open(filepath,'rb') 37 md5obj = hashlib.md5() 38 md5obj.update(f.read()) 39 hash = md5obj.hexdigest() 40 f.close() 41 return str(hash).upper() 42 else: 43 print " 33[1;31;40mERROR:Get the %s MD5 failed 33[0m" % filepath 44 return None 45 46 def file_exists(): 47 filemd5 = getFileMD5() 48 downloadftpfile = localpath + filename 49 if os.path.exists(downloadftpfile) and filemd5 == sys.argv[2]: 50 print " 33[1;32;40m====================ftp down ok and md5 value is ok====================== 33[0m" 51 elif os.path.exists(downloadftpfile) and filemd5 != sys.argv[2]: 52 print " 33[1;31;40m====================ftp down ok and md5 value is bad====================== 33[0m" 53 else: 54 print " 33[1;31;40mERROR:The %s is not exists 33[0m" % downloadftpfile 55 56 def uploalfile(ftp, remotepath, localpath): 57 bufsize = 1024 58 fp = open(localpath, 'rb') 59 ftp.storbinary('STOR ' + remotepath, fp, bufsize) 60 # ftp.set_debuglevel(0) 61 ftp.close() 62 63 def download(): 64 try: 65 ftp = ftpconnect("x.x.x.x", "x.x", "x.x") 66 downloadfile(ftp, filename) 67 ftp.quit() 68 file_exists() 69 except ftplib.error_perm: 70 os.chdir(localpath) 71 os.remove(filename) 72 file_exists() 73 if __name__ == "__main__": 74 download()