Override Flask configuration via Cookie at runtime.
This extension allows to change the configuration of a Flask application at runtime. This behavior is controlled by cookie and therefore is contained to the session of an unique user; configuration changes are not affecting other users.
The configuration options able to be overridden are limited and configurable as well (using CONFIG_OVERRIDE_EXTENDABLE_VARS). This option can NOT be overridden for security reason.
The idea is to replace the configuration object of a Flask application by a proxy object, whom behavior can be controlled/changed upon request while exposing the same interface as a Flask configuration. The extension also provide a blueprint (default base url to /config_override/) to control the cookie via some simple HTTP calls; this is automatically attached to the application.
pip install flask-config-override
Once installed, first attach the extension to your Flask application:
from flask import Flask from flask.ext.config_override import ConfigOverride
app = Flask(__name__) app.config[‘FOO’] = ‘bar’
# Enable the override for the DEBUG option (default to false) app.config[‘CONFIG_OVERRIDE_EXTENDABLE_VARS’] = [‘FOO’] config_override = ConfigOverride(app)
# configure your routes and what not…
Launch your app, then open your browser and go to this url to setup the FOO option to another value; here “toto”:
Your session will now run with the settings FOO set to the new value. You can access it normally from app.config[‘FOO’] within the context of a request.
To see the current changes, you can visit this url:
And to remove the changes, you just need to clear your cookie or go there:
- First install nose for test discovery: pip install nose
- Then run the tests within a virtual environment: nosetests
Feel free to post issues, pull requests in github or contact me directly on twitter @el_boby.
- test for cookie_utils
- test for proxy_config (based on flask one)
- documentation API (sphinx)
- Override by Environment variables.
- Flask Debug Toolbar integration.
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