使用python实现正则匹配检索远端FTP目录下的文件

# coding=utf-8
#########################################################################
# File Name: reg_url.py
# Author: WangWeilong
# Company: Baidu
#########################################################################

import re
import sys
import os
from ftplib import FTP

dhccmd = "http://xxx/api/submit"

class DHC_FTP():
 def __init__(self, hostname, username="", passwd=""):
  self.hostname = hostname
  try:
   self.ftp = FTP(self.hostname)
  except:
   print "hostname error!"
   exit(-1)
  self.username = username
  self.passwd = passwd
  self.filelist = []
  self.reg_pattern = ""

 def getftpfilelist(self, path):
  self.ftp.login(self.username, self.passwd)
  self.ftp.cwd(path)
  self.filelist = self.ftp.nlst()

 def matchnames(self, regpattern):
  pattern = re.compile(regpattern)
  matchedfiles = []
  for file in self.filelist:
   match = pattern.search(file)
   if match:
    matchedfiles.append(match.string)
  return matchedfiles



if __name__ == "__main__":
 if len(sys.argv) != 4:
  print 'usage:python reg_url.py $ftpurldir $regular'
 else:
  #解析ftpurl字符串
  head = sys.argv[1].split("@")[1].split("/")[0]
  username = sys.argv[1].split("//")[1].split(":")[0]
  passwd = sys.argv[1].split("//")[1].split(":")[1].split("@")[0]
  pathdir = sys.argv[1].split(head)[1]

  dhc_ftp = DHC_FTP(head, username, passwd)
  dhc_ftp.getftpfilelist("./" + pathdir)

  #获取正则表达式
  regpattern = r'%s' % sys.argv[2]

  matchedfiles = dhc_ftp.matchnames(regpattern)
  for files in matchedfiles:
   ftpname = sys.argv[1] + "/" + files
   print ftpname

通过输入想要的检索的远端目录地址和想要用来匹配的正则表达式，就能获取到远端的文件了，至于用这些文件来干嘛，那就是需求问题了。

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