linux sftp 续传

import paramiko

def sftp_resume(host, port, username, password, local_path, remote_path):
    transport = paramiko.Transport((host, port))
    transport.connect(username=username, password=password)
    sftp = paramiko.SFTPClient.from_transport(transport)

    try:
        # 尝试获取远程文件的大小
        try:
            remote_size = sftp.stat(remote_path).st_size
        except FileNotFoundError:
            remote_size = 0

        # 如果本地文件存在且大小大于远程文件，则进行续传
        if os.path.exists(local_path):
            local_size = os.path.getsize(local_path)
            if local_size > remote_size:
                with open(local_path, 'rb') as local_file:
                    local_file.seek(remote_size)
                    sftp.putfo(local_file, remote_path, file_size=local_size, callback=None, confirm=False)
            else:
                print("本地文件较小，无需续传")
        else:
            sftp.put(local_path, remote_path)
    finally:
        sftp.close()
        transport.close()

# 使用示例
sftp_resume('your_host', 22, 'your_username', 'your_password', 'local_file.txt', 'remote_file.txt')