使用Python批量下载ftp服务器中的内容

使用ftplib，轻松实现从ftp服务器上下载所需要的文件，包括目录结构等，支持了一下断点续传

 from ftplib import FTP

 import sys

 import os

 import re

 def ftpconnet(ftpserver,port,username,password):

     ftp = FTP()

     try:

         ftp.connect(ftpserver,port)

     except:

         raise IOError,'FTP connect failed!'

     try:

         ftp.login(username,password)

     except:

         raise IOError,'FTP login failed!'

     else:

         return ftp

 def ftpdownload(ftp,ori_path,dest_path):

     for each in ftp.nlst(ori_path):

         try:

             ftp.cwd(each)

         except:

             filename = re.search('\S+\/(\S+)',each).group(1)

             local_file = dest_path + '/' + filename

             if os.path.exists(local_file):

                 lsize = os.stat(local_file).st_size

                 rsize = ftp.size(each)

                 if lsize > rsize:

                     sys.stderr.write('the local file %s is bigger than the remote!\n'%local_file)

                     return False

                 elif lsize == rsize:

                     sys.stderr.write('the file %s has been completed!\n'%local_file)

                 bufsize = 1024 * 1024

                 fp = open(local_file,'ab')

                 ftp.retrbinary('RETR '+each,fp.write,bufsize,rest=lsize)

             else:

                 bufsize = 1024 * 1024

                 fp = open(local_file,'wb')

                 ftp.retrbinary('RETR '+each,fp.write,bufsize)

         else:

             dirname = re.search('\S+\/(\S+)',each).group(1)

             dirname = dest_path + '/' + dirname + '/'

             os.system('mkdir -p %s'%dirname)

             ftpdownload(ftp,each,dirname)

 def ftpclose(ftp):

     ftp.quit()

 if __name__ == '__main__':

     ftp = ftpconnet('climb.genomics.cn',21,'','')

     ftpdownload(ftp,'/pub/10.5524/100001_101000/100145/','./')

     ftpclose(ftp)