Flask Framework Cookbook - Second Edition

How to do it...

First, we will start with the configuration bit. We need to provide a parameter to our application configuration, that is, UPLOAD_FOLDER. This parameter tells Flask about the location where our uploaded files will be stored. We will implement a feature to store product images.

One way to store product images can be to store images in a binary type field in our database, but this method is highly inefficient and never recommended in any application. We should always store images and other uploads in the filesystem, and store their locations in the database using a string field.

Add the following statements to the configuration in my_app/__init__.py:

import os ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif']) ...