from flask_restful import reqparse, Resource

from flask import send_from_directory

class DownloadLocalScripts(Resource):
    def get(self):
        parser = reqparse.RequestParser(trim=True)
        parser.add_argument('path', required=True, nullable=False,location=['args'])
        args = parser.parse_args()
        # 获取文件目录，绝对路径
        path = '/'.join(args['path'].split('/')[:-1])
        # 获取文件名称
        filename = args['path'].split('/')[-1]
        response = send_from_directory(path,filename,as_attachment=True)
        return response

//方法一
//response.data + '/' + download_url 是绝对地址

window.open(response.data + '/' + download_url, '_blank');

//方法二
let a = document.createElement('a')
a.href = response.data + '/' + download_url
a.click();