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import os
from ftputil import FTPHost, session

ftp = None

def init(app):
    server_ip = 'xxx.xxx.xxx.xxx'
    server_port = 21
    user = 'user'
    password = 'password'

    global ftp
	#当ftp client在容器内时，由于client端口未做映射，必须采用被动模式连接到ftp server，同时ftp server必须进行端口映射
    ftp = FTPHost(server_ip, user, password,
                  session_factory=session.session_factory(port=server_port, use_passive_mode=True))

def upload_file(local_path, remote_path):
    remote_dir = os.path.dirname(remote_path)
    if not ftp.path.exists(remote_dir):
        ftp.makedirs(remote_dir)
    ftp.upload(local_path, remote_path)

def download_file(local_path, remote_path):
    local_dir = os.path.dirname(local_path)
    if not os.path.exists(local_dir):
        os.makedirs(local_dir)
    ftp.download(remote_path, local_path)