GO Stripe

Components

A sample E-Commerce application that consists of multiple, separate applications:

• A front end, rendered using Go's rich html/template package and services content to the end user as web pages.
• A restful back end API, which is called by the front end as necessary.
• A microservice that's dynamically building PDF invoices and sending them to customers as an email attachment.

Functionalities

The application:

• allows users to purchase a single product.
• allows users to purchase a recurring monthly subscription (a Stripe plan).
• handles subscription cancellations and refunds.
• saves all transaction information to a MariaDB database (for refunds, reporting, etc.).
• secures access to the frontend via session authentication.
• secures access to the backend API via stateful tokens.
• manages users (add/edit/delete).
• allows users to reset their passwords safely and securely.
• supports logging a user out and cancel their account instantly, over websockets.
• produces PDF invoices and sends them via email to the customers.

MariaDB database

Start the database:

docker-compose up

DB Migration Tool

Soda CLI

Run DB migrations with Soda CLI

cd migrations &&
soda migrate

Generate DB dump from Docker container

docker exec -i [CONTAINER_NAME] mysqldump -uroot -p[ROOT_PASSWORD] --databases [DB_NAME] --skip-comments > [YOUR_PATH]/dump.sql

Environment variables required for each app component

Frontend (cmd/web/main.go)

// stripe
STRIPE_KEY=
STRIPE_SECRET=

// Secret Key (Must be 256 bits/32 chars)
SECRET_KEY=

Backend (cmd/api/api.go)

// stripe
STRIPE_KEY=
STRIPE_SECRET=

// Secret Key (must be the same as frontend SECRET_KEY)
SECRET_KEY=

// smtp (e.g. mailtrap.io)
SMTP_USERNAME=
SMTP_PASSWORD=

Invoice Microservice (cmd/micro/invoice/invoice.go)

// smtp (e.g. mailtrap.io)
SMTP_USERNAME=
SMTP_PASSWORD=

Start the app (with Makefile)

• Fill out the ENV's at the top of the makefile.example
• Rename Makefile.example to Makefile
• Run make start to start all the app components

Main Go Modules Used in this project

go-chi/chi: HTTP router

stripe-go: Go Stripe SDK

scs: session manager

scs/mysqlstore: MySQL-based session manager

go-simple-mail: SMTP Client

go-alone: MAC signer

gorilla/websocket: WebSocket implementation

gofpdf: PDF document generator