Flask-Rev is a very simple flask extension that aims to make it easier to integrate flask and those fancy reactive javascript front-ends out there (react, angular, vuejs...). It allows you to keep an aggressive cache with your HTTP server AND always return fresh static content to user requests. It does so by appending the static file hash to the static file's url as a query string parameter.

Notice that appending the hash only happens when debug mode is False. Also, be aware that the hash cache is created during runtime. So, you may experience some "warming up" slow-down in the first request. This behavior might change in the future.

The advantage of this approach? Your static files names won't change between updates.

This plugin is heavely based upon these two snippets:

• https://gist.github.com/mfenniak/2978805
• https://gist.github.com/Ostrovski/f16779933ceee3a9d181#file-flask_static_files_cache_invalidator-py-L20

Thanks!

pip install flask-rev

from flask import Flask, url_for
from flask_rev import Rev

app = Flask(__name__)
Rev(app)

url_for('static', filename='bundle.js')
# outputs: /static/bundle.js?h=<md5hash>

> python3 setup.py test
> # or
> tox