Flask-下载功能

import os
import pathlib
import mimetypes
from flask import Flask,Response,make_response,send_from_directory
base_path = pathlib.Path(__file__).parent
app = Flask(__name__)
'''
下载的时候要注意的问题:
    1.设置响应请求头的类型 ： Content-Type 平常都是json格式，文件的话是其他的格式
    2.告诉浏览器当前下载的作为浏览器的附件下载属性: Content-Disposition https://cloud.tencent.com/developer/section/1189916
​
'''
​
@app.route('/dow')
def dow():
    path = os.path.join(base_path,'下载文件.txt')
    file = open(path,mode='rb')
    # response = make_response(file)
    # response.default_mimetype = 'text/html'
    # response['Content-Disposition']='attachment; filename="filename.txt"'
    '''
    path: 下载的文的路径 相当于 open(path,mode='rb') Content-Type: text/plain; charset=utf-8
    filename：下载文件的名称和后缀 相当于请求头中的 filename="filename.txt
    directory: 当前下载文件的父级路径
    as_attachment : False则浏览器返回文件预览 如果该文件可以被浏览器渲染  response['Content-Disposition']='attachment; 
    '''
    return send_from_directory(path=path,filename='下载文件.txt',as_attachment=False,directory=base_path)
​
@app.route('/dow2')
def uploaded_file():
    path = os.path.join(base_path,'下载文件.txt')
    f = open(path, "rb")
    res = Response(f.readlines())
    mime_type = mimetypes.guess_type(path)[0]
    res.headers['Content-Type'] = mime_type
    res.headers['Content-Disposition'] = "attachment; filename=filename.txt"
    return res
​
​
​
if __name__ == '__main__':
    app.run()

资料案例
https://blog.csdn.net/li627528647/article/details/77544136
https://blog.csdn.net/qq_44198436/article/details/106922355
https://blog.csdn.net/WJ844908240/article/details/102517072