flask_restful實現文件下載功能

環境：前后端完全分離，后端flask_restful，前端vue

from flask_restful import reqparse, Resource
from flask import send_from_directory,send_file,safe_join
from werkzeug.utils import secure_filename

class DownloadTemplates(Resource):
    def get(self):
        parser = reqparse.RequestParser(trim=True)
        parser.add_argument('filename', required=True, nullable=False, location=['args'])
        args = parser.parse_args()
        filename = args['filename']
        path = handle_manage.template_dir
        response = send_from_directory(path, filename, as_attachment=True)
        return response


注意：這種做法有時會報錯404，提示找不到url
genericpath.py 如果系統安裝了這個組件的話：
 
會替換系統自帶的path功能，導致，path失效了。最終會找不到文件。
 
代碼只有這樣簡短的幾句話而已。就是這個os.path.isfile會有問題。所以，放在uploaded_file中來完成這個動作，就可以了

class DownloadTemplates(Resource):
    def get(self):
        parser = reqparse.RequestParser(trim=True)
        parser.add_argument('filename', required=True, nullable=False, location=['args'])
        args = parser.parse_args()
        UPLOAD_FOLDERS = handle_manage.template_dir
        filename = args['filename']
        return send_file(safe_join(UPLOAD_FOLDERS, secure_filename(filename)), as_attachment=True)

 

 

前端

this.currentNode.path 為文件絕對路徑

//方法一
//response.data + '/' + download_url 是絕對地址

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

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