Stripe Checkout as a 1-File Rails App

This is a Rails version of Stripe Checkout's suggested Ruby backend, using a single file.

To use it, simply fork, modify what you need to, and deploy.

Usage

$ STRIPE_API_KEY=sk_test_asdasda SECRET_KEY_BASE=test puma

How Does It Work?

1. When you run puma, it looks for a file called config.ru if you don't tell it what to run.
2. config.ru in this project defines a Rack application, that is, StripeCheckout. At the end of the file, we run StripeCheckout, because run <rack-application is how Rack defines what the application is.
3. Other than that, we basically just took all the different files generated from rails new and put them into a single file, then took out everything you don't absolutely need to run this app.

How Can I Expand It?

Basically, look at rails new output and then add in what you need to. Generally you can add new files in here one at a time.

Where can I learn more about mini Rails apps?

Here are a bunch of examples, including one that's the size of a Tweet, and here is a conference talk about them.