On a Friday evening, not too long ago, I was lamenting the shortcomings of the various services I've used to sell my digital book from my personal website. Digital goods sales should be a solved problem by now, but I ran into all sorts of issues when trying to send updates to customers and integrate properly with Google Analytics.
Long
story
short, I took two hours and wrote a replacement using Python, Flask,
SQLAlchemy, and Stripe (as the payment processor). bull is to set up
on your own domain. Why does the fact that bull runs on your own
domain matter? Because it makes Google Analytics happy and report
conversions properly.
The only things you need to get started using bull are a Stripe
account (free) and a web server (free?).
pip install bull. This installs thebullcommand, which helps setup your environmentbull setup. This creates a directory namedbullwith the following contents:
app.py: the main application script.get_appcan be used to runbullas a WSGI applicationconfig.py:bull's configuration file. This must be edited to contain your installation-specific configuration details.filesdirectory: The directory that contains the files for your digital products
- Add product entries to the database (use
scripts/populate_dbas a model) - (Optional) Create an admin user for viewing
/reportsby runningscripts/create_user.py - Add
bullto your web server's configuration - Profit! (...literally)
bull supports simple sales analytics at the /reports endpoint.
It requires authorization, which in turn requires you to create (at
least one) user using the scripts/create_user.py script. To see the
reports, hit /login, log in, and from then on you can go directly to
/reports to see reporting data. You should be good to go after that,
and no one else will be able to see the reports.
If for some reason you need to logout, there is also a /logout
endpoint which will log you out (which should use HTTP POST instead of
GET, but whatever).
Reporting includes:
- Email addresses and sales totals of recent purchases
- Sales data broken down by calendar day
- Sales charts based on revenue/units sold per day
Simply create a templates directory and create a file of the same
name as the template you want to replace.
bull has a (small) suite of tests that are run via TravisCI, but can
(and should) also be tested manually once installed. Run
python app.py and browse to http://localhost:5000/test/1. You should
see a single "Buy" button, which should be completely functional
(assuming you have at least one product in your database). Enter
Stripe's test credit card number (4242 4242 4242 4242). You should be
successfully directed to a "success.html" page with your download link.
If your product is in the files directory, you'll be able to
download it by clicking the link.
Don't run ``app.py`` in production. The web server it uses is not meant for such a purpose. Instead, deploy as you would normally deploy an WSGI application. See Flask's documentation on the subject.
Still need to add better documentation and (possibly) deployment
information. All of this is coming. I just wanted to get bull out as
fast as possible so that those who know what they're doing can make use
of it.


