python向ftp上传文件，解决中文问题

# coding: UTF-8
import os
import sys
import salt.client
import salt.config
import time
from ftplib import FTP, FTP_TLS
import json
from subprocess import Popen, PIPE, STDOUT

agent_ids = agent_ip.split(',')
if '{' in sys_type:
    sys_types=json.loads(sys_type)
else:
    sys_types={}
    for i in agent_ids:
        sys_types.update({i:sys_type})

def get_source_file_path(source_file_path,agent_id):
    global sys_types
    sys_type=sys_types.get(agent_id)
    if sys_type == 'windows':
        if source_file_path.startswith('/'):
            source_file_path='c:'+source_file_path
        source_file_path = source_file_path.replace('\\\\', '/')
        source_file_path = source_file_path.replace('\\', '/')
        source_file_path=source_file_path.decode('gbk')
        print source_file_path
    else:
        if isinstance(source_file_path, unicode):
            source_file_path = source_file_path.encode('utf8')
    file_paths = source_file_path.split('\n')
    return file_paths

if isinstance(ftp_dir, unicode):
    ftp_dir = ftp_dir.encode('utf8')

BASE_URL = os.getenv('ANT_BASEURL')

fail = []
success = []

def agent_to_proxy():
    global agent_ids, source_file_path, success, fail, BASE_URL
    proxy_path = os.getenv('ANT_MODULE_ROOT', '')
    master_conf = os.path.join(proxy_path, 'conf', 'master')
    if not os.path.exists(master_conf):
        print('Proxy 路径不正确 {}'.format(proxy_path))
        sys.exit(1)
    opts = salt.config.client_config(master_conf)
    LocalClient = salt.client.LocalClient(master_conf)
    CACHE_DIR = opts['cachedir']
    for agent_id in agent_ids:
        file_paths=get_source_file_path(source_file_path, agent_id)
        print file_paths
        ret = LocalClient.cmd(agent_id, 'cp.push', file_paths, expr_form='list')
        no_exist_hosts = set(ret.keys()) - set(agent_ids)
        print no_exist_hosts
        if no_exist_hosts:
            print('异常：{} agent 不存在'.format(list(no_exist_hosts)))
            sys.exit(1)
        for file_path in file_paths:
            for host, status in ret.iteritems():
                if status is True:
                    proxy_file_path = os.path.join(CACHE_DIR, 'minions', host, 'files',
                                                   file_path.lstrip('/'))
                    res = proxy_to_ftp(proxy_file_path)
                    if res:
                        print file_path, '上传成功'
                    else:
                        fail.append('{}:{}'.format(host, file_path))
                elif status is False:
                    print('{}:{} 上传失败，可能文件不存在'.format(host, file_path))
                    fail.append('{}:{}'.format(host, file_path))
                else:
                    print('异常：{}:{} 上传失败，{}'.format(host, file_path, status))
                    fail.append('{}:{}'.format(host, file_path))

def _conn_ftp(user, passwd):
    global ftp_host, ftp_port, connect_type
    conn = False

    ispasv = False if user in (None, 'false') else True

    ftp_url = ftp_host
    connect_type = connect_type.lower()
    port = ftp_port
    try:
        if ':' in ftp_url:
            conn = True
            ftp_url, port = ftp_url.split(':')

        if conn:
            ftp = FTP()
            ftp.connect(host=str(ftp_url), port=int(port))
        else:
            ftp = FTP(ftp_url)
        ftp.login(user, passwd)

    except Exception as e:
        if 'requires SSL.' in '{}'.format(e):
            try:
                if conn:
                    ftp = FTP_TLS()
                    ftp.connect(host=ftp_url, port=int(port))
                else:
                    ftp = FTP_TLS(ftp_url)
                ftp.login(user, passwd)
            except Exception as e:
                print e
                sys.exit(1)
        else:
            print e
            sys.exit(1)
    return ftp, ispasv

def proxy_to_ftp(proxy_file_path):
    global username, password, ftp_dir
    ftp, ispasv = _conn_ftp(username, password)
    ftp.encoding = "utf-8"
    try:
        ftp.set_pasv(ispasv)
        # ftp.retrlines('LIST')
    except:
        ftp.set_pasv(not ispasv)
    now_path = ftp.pwd()
    print now_path

    if ftp_dir and ftp_dir != '/':
        try:
            ftp.cwd(ftp_dir)
        except:
            new_path = os.path.join(now_path, ftp_dir.lstrip('/'))
            print new_path
            ftp.mkd(new_path)
            ftp.cwd(new_path)

    try:
        ftp.rename(os.path.basename(proxy_file_path).decode("utf8").encode('gbk'), os.path.basename(proxy_file_path).decode("utf8").encode('gbk')+'.'+time.strftime('%Y-%m-%d_%H:%M:%S'))
    except:
        pass
    print proxy_file_path
    with open(proxy_file_path, 'rb') as f_:
        result = ftp.storbinary('STOR %s' % os.path.basename(proxy_file_path).decode("utf8").encode('gbk'), f_)

    ftp.close()
    if 'Transfer complete.' in result:
        return True
    else:
        return False

try:
    agent_to_proxy()
    if success:
        print '文件传输成功:{}'.format(','.join(success))
    if fail:
        print '文件传输失败:{}'.format(','.join(fail))
        sys.exit(1)
except Exception as e:
    print e
    sys.exit(1)