w20e.paywall

A proof of concept paywall mechanism using the microframework Flask and the online payment platform Mollie.

requirements

Flask
requests
redis
mollie-api-python

virtualenv

virtualenv VENV
. ./VENV/bin/activate

clone from git

git clone https://github.com/wyldebeast-wunderliebe/w20e.paywall.git

buildout

cd w20.paywall
pip install zc.buildout
buildout -v

settings overrides

Use settings_overides.py for environment specific configuration adjustments like MOLLIE_API_KEY, REDIS_HOST and CSRF_SECRET_KEY.

touch src/instance/settings_overrides.py

fire up on development

export FLASK_APP=src/w20e/paywall/app.py
./bin/flask run

ngrok or serveo for localhost testing

Since Mollie needs to be able to reach your server (webhook_verification), you might consider using ngrok or serveo to create a secure tunnel to your localhost.

Serveo example: ssh -R 80:localhost:5000 serveo.net

fire up on production: mod_wsgi snippet

The paywall.wsgi script gets created by buildout. Below is a mod_wsgi snippet to get things going on Apache.

WSGIDaemonProcess paywall user=app-paywall-prd group=app-paywall-prd threads=5
WSGIScriptAlias / /opt/APPS/paywall/prd/w20e.paywall/parts/wsgiscript/paywall.wsgi

<Directory /opt/APPS/paywall/prd/w20e.paywall>
    WSGIProcessGroup paywall
    WSGIApplicationGroup %{GLOBAL}
    Require all granted
</Directory>

routes

For starters, you can navigate the following routes.

[host]/manage_vouchers: Needs to be restricted in a production environment. Gives an overview of all active vouchers, both valid and not.
[host]/test_voucher: A verify-buy-redirect chain, roundtripping the entire paywall mechanism.
[host]/new_voucher: Buy a voucher using a predefined set of voucher types.