python flask 上传下载 api_Flask 文件下载API

给前端提供一个文件下载接口时, 遇到了文件名乱码的问题, 几经折腾总算实现效果, 代码如下:

import requests

from flask import Response, jsonify, request, stream_with_context

from flask_login import login_required

from . import bp

from .models import Courseware

@bp.route("/courseware/download")

@login_required

def courseware_download():

"""

课件下载 GET

:param id: 课件id

"""

pk = request.args.get("id", type=int)

obj = Courseware.query.get(pk)

if not obj:

return jsonify(detail=f'Courseware(id={pk}) not found.'), 404

try:

url = f"{obj.domain.rstrip('/')}/{obj.filekey}" # 七牛云文件下载地址

r = requests.get(url, stream=True, timeout=500)

response = Response(

stream_with_context(r.iter_content(chunk_size=1024)),

content_type=r.headers["content-type"],

)

header = f'attachment; filename="{quote(obj.filename.encode())}"'

response.headers["Content-Disposition"] = header

return response

except Exception as e:

print("download file error:", e)

return jsonify(detail=str(e)), 422