[flask] the server obtains the file requested by the client

1、 background

About http Algorithm servers generally support input image_base64、image_url.
namely ： The image URL route , Images Base64 Encoding data ;
But after the research , Found that Huawei also supports uploading image_file Local images .

Upload image_file Local images , It involves the server getting the file requested by the client .

python Build services , The preferred flask lightweight framework .

about Web application , The data interaction between client and server is very important .
stay Flask The framework consists of global request Object to provide this information .

This blog is about request Properties of ：headers 、files、form.

2、request attribute

About this blog request Properties of ：headers 、files、form.
Other properties , I'll introduce it when I use it .

Property name	explain
headers	Request header , Dictionary data type .
files	MultiDict, With pass