使用python实现正则匹配检索远端FTP目录下的文件
遇到一个问题,需要正则匹配远端FTP目录下的文件,如果使用ftp客户端可以通过命令行很容易的做到这一点,但是暂时没有一个工具支持这样的需求,于是通过python对FTP的支持和对正则表达式的支持,写了这么一个简单的工具,用于使用正则表达式来匹配远端目录的文件。
代码如下
# 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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