linux ftp 备份

import os
from ftplib import FTP

def ftp_backup(host, user, passwd, local_dir, remote_dir):
    ftp = FTP(host)
    ftp.login(user=user, passwd=passwd)
    
    # 切换到远程目录
    ftp.cwd(remote_dir)
    
    # 遍历本地目录并上传文件
    for root, dirs, files in os.walk(local_dir):
        for file in files:
            local_file_path = os.path.join(root, file)
            remote_file_path = os.path.join(remote_dir, os.path.relpath(local_file_path, local_dir))
            
            # 创建远程目录结构
            remote_parent_dir = os.path.dirname(remote_file_path)
            try:
                ftp.cwd(remote_parent_dir)
            except:
                ftp.mkd(remote_parent_dir)
                ftp.cwd(remote_parent_dir)
            
            # 上传文件
            with open(local_file_path, 'rb') as f:
                ftp.storbinary(f'STOR {file}', f)
    
    ftp.quit()

# 使用示例
ftp_backup('ftp.example.com', 'username', 'password', '/path/to/local/dir', '/path/to/remote/dir')