python备份远程FTP脚本实现方法

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# 来自www.idcnote.com 
#!/usr/bin/python
# -*- coding: utf-8 -*-
import commands
import sys
import os
import re
import zipfile
from datetime import date,datetime,timedelta
 
class Package:
    """
    检查fuse-curlftpfs软件包的安装与否，如果没有，则安装之
    """
 
    def __init__(self,name):
        self.name=name
    def install(self):
        print('execute "yum install ' + self.name + '"...')
    #cmd=commands.getstatusoutput('yum install ' +  self.name + ' -y')
        print os.system('yum install ' +  self.name + ' -y')
        if self.name in os.popen('rpm -qa | grep ' + self.name).read():
        print('Install ' + self.name + ' successful.')
        else:
            print('Install ' + self.name + ' failed, aborting.')
            sys.exit()
    def checkinstall(self):
    cmd=commands.getstatusoutput('rpm -qa | grep ' +  self.name)
        if self.name in cmd[1]:
            print(self.name + ' has aleady installed. Continue...')
        else:
            print(self.name + ' isn\'t installed. Ready to install it.')
        self.install()
 
class Backup:
    """
    使用shell命令挂载之，然后执行备份过程（压缩目录，删除旧文件），压缩完成以后再解除挂载
    """
 
    def __init__(self,server,user,passwd,backupname):
        self.server=server
        self.user=user
        self.passwd=passwd
        self.backupname=backupname
    def mount(self):
        try:
            if os.path.isdir('/' + self.backupname):
                print('found mount point /' + self.backupname + ', ready to mount ftp server.')
            else:
                print('doesn\'t found mount point /' + self.backupname + ', build it.')
                os.mkdir('/' + self.backupname)
        except IOError, error:
            print error
            sys.exit()
 
        cmd=commands.getstatusoutput(r'curlftpfs ftp://' + self.user + ':' + self.passwd + '@' + self.server + r' /' + self.backupname + ' -o codepage=utf8')
        print cmd[1]
 
        pat=r'fuse(.+)/' + self.backupname
        all=os.popen('df -hT').read()
        if re.search(pat,all):
            print('mounted /' + self.backupname + ', continue...')
        else:
            print('mount failed. please check.')
            sys.exit()
 
    def backup(self):
        newday = date.today()    #获取今天的日期
        oldday = date.today()-timedelta(5)    #获得5天前的日期
        newfile = self.backupname + '_backup_' + str(newday.year) + '.' + str(newday.month) + '.' +  str(newday.day) + '.zip'    #本次备份的文件名
        oldfile = self.backupname + '_backup_' + str(oldday.year) + '.' + str(oldday.month) + '.' +  str(oldday.day) + '.zip'    #5天前备份的文件名
 
        print('delete old file...')
        try:
            if os.path.isfile(oldfile):
                os.remove(oldfile)
            else:
                print('don\'t found old file, jumped.')
        except IOError, err:
            print err
 
        print('compress directory. it will take a while.')
        try:
            f = zipfile.ZipFile(newfile,'w',zipfile.ZIP_DEFLATED)
            for dirpath, dirnames, filenames in os.walk(r'/' + self.backupname):
                for filename in filenames:
                    f.write(os.path.join(dirpath,filename))
            f.close()
            print("backup completely! file name is " + newfile)
        except (IOError, OSError), err:
            print err
            self.umount()
            sys.exit()
 
    def umount(self):
        cmd=commands.getstatusoutput('umount /' + self.backupname)
 
        pat=r'fuse(.+)/' + self.backupname
        all=os.popen('df -hT').read()
        if not re.search(pat,all):
            print('umounted /' + self.backupname + '. Done!')
        else:
            print('umount failed. please check.')
 
 
if __name__=='__main__':
    ps=Package('fuse-curlftpfs')
    ps.checkinstall()
 
    #标示符是挂载到本的的文件名，及压缩以后的文件名，只能用英文且不能有空格，可以用下划线
    #如果要备份多个FTP，把下面4行复制一遍即可，注意每个的标示符不能一样
    bu=Backup('FTP地址','用户名','密码','标示符')
    bu.mount()
    bu.backup()
    bu.umount()

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