Python FTP

# -*- coding: utf-8 -*import ftplibimport osimport sysimport timeimport socketdef get_filename(line):    pos = line.rfind(':')    while line[pos] != ' ':        pos += 1    while line[pos] == ' ':        pos += 1    file_arr = [line[0], line[pos:]]    return file_arrclass UserFtp:    def __init__(self, _hostaddr, _username, _password, _remotedir, _port=21):        self.hostaddr = _hostaddr        self.username = _username        self.password = _password        self.remotedir = _remotedir        self.port = _port        self.ftp = ftplib.FTP()        self.file_list = []        # self.ftp.set_debuglevel(2)    def __del__(self):        self.ftp.close()        # self.ftp.set_debuglevel(0)    def login(self):        ftp = self.ftp        try:            timeout = 60            socket.setdefaulttimeout(timeout)            ftp.set_pasv(True)            print '开始连接到 %s' % self.hostaddr            ftp.connect(self.hostaddr, self.port)            print '成功连接到 %s' % self.hostaddr            print '开始登录到 %s' % self.hostaddr            ftp.login(self.username, self.password)            print '成功登录到 %s' % self.hostaddr            print ftp.getwelcome()        except Exception, e:            print e.message            return False        try:            ftp.cwd(self.remotedir)        except Exception, e:            print e.message            return False        return True    def is_same_size(self, localfile, remotefile):        try:            remotefile_size = self.ftp.size(remotefile)        except Exception, e:            remotefile_size = -1            print e.message        try:            localfile_size = os.path.getsize(localfile)        except Exception, e:            localfile_size = -1            print e.message        print 'lo:%d  re:%d' % (localfile_size, remotefile_size)        if remotefile_size == localfile_size:            return 1        else:            return 0    def download_file(self, localfile, remotefile):        if self.is_same_size(localfile, remotefile):            print '%s 文件大小相同，无需下载' % localfile            return        else:            print '>>>>>>>>>>>>下载文件 %s ... ...' % localfile            # return        file_handler = open(localfile, 'wb')        self.ftp.retrbinary('RETR %s' % remotefile, file_handler.write)        file_handler.close()    def download_files(self, localdir='./', remotedir='./'):        try:            self.ftp.cwd(remotedir)        except Exception, e:            print e.message            print '目录%s不存在，继续...' % remotedir            return        if not os.path.isdir(localdir):            os.makedirs(localdir)            print '切换至目录 %s' % self.ftp.pwd()        self.file_list = []        self.ftp.dir(self.get_file_list)        remotenames = self.file_list        # print(remotenames)        # return        for item in remotenames:            filetype = item[0]            filename = item[1]            local = os.path.join(localdir, filename)            if filetype == 'd':                self.download_files(local, filename)            elif filetype == '-':                self.download_file(local, filename)        self.ftp.cwd('..')        print '返回上层目录 %s' % self.ftp.pwd()    def upload_file(self, localfile, remotefile):        if not os.path.isfile(localfile):            return        if self.is_same_size(localfile, remotefile):            localfile = localfile.decode('gbk').encode('utf-8')            print '跳过[相等]: %s' % localfile            return        file_handler = open(localfile, 'rb')        self.ftp.storbinary('STOR %s' % remotefile, file_handler)        file_handler.close()        localfile = localfile.decode('gbk').encode('utf-8')        print '已传送: %s' % localfile    def upload_files(self, localdir='./', remotedir='./'):        if not os.path.isdir(localdir):            return        localnames = os.listdir(localdir)        try:            self.ftp.cwd(remotedir)        except Exception, e:            print e.message            return        for item in localnames:            src = os.path.join(localdir, item)            if os.path.isdir(src):                try:                    self.ftp.mkd(item)                except Exception, e:                    print e.message                    print '目录已存在 %s' % item                self.upload_files(src, item)            else:                self.upload_file(src, item)        self.ftp.cwd('..')    def get_file_list(self, line):        file_arr = get_filename(line)        if file_arr[1] not in ['.', '..']:            self.file_list.append(file_arr)def deal_error(e):    timenow = time.localtime()    datenow = time.strftime('%Y-%m-%d', timenow)    logstr = '%s 发生错误: %s' % (datenow, e)    print logstr    # file.write(logstr)    # sys.exit()if __name__ == '__main__':    # file = open("log.txt", "a")    # timenow = time.localtime()    # datenow = time.strftime('%Y-%m-%d', timenow)    # logstr = datenow    print sys.getdefaultencoding()    # 配置如下变量    hostaddr = '192.168.0.1'  # ftp地址    username = 'admin'  # 用户名    password = '123456'  # 密码    port = 21  # 端口号    rootdir_local = '.' + os.sep + 'bak/'  # 本地目录    rootdir_remote = './'  # 远程目录    userFtp = UserFtp(hostaddr, username, password, rootdir_remote, port)    ret = userFtp.login()    if ret:        userFtp.upload_files("F:\documents", './1')    # f.download_files(rootdir_local, rootdir_remote)    # timenow = time.localtime()    # datenow = time.strftime('%Y-%m-%d', timenow)    # logstr += " - %s 成功执行了备份\n" % datenow    # debug_print(logstr)    #    # file.write(logstr)    # file.close()