This tiny API provides subscribing and unsubscribing of users using the go-news package.

Responds with all subscribers for a newsletter, provided in the query-string parameter.

Accepts a form body with a newsletter name and subscriber and email.

Requires the newsletter and token query-string parameters. The token must be signed with the TOKEN_SECRET and the included token package, this ensures that only people who received an email with this token in their unsubscribe link can perform an unsubscribe.

• Create a DynamoDB table with a Partition Key of "newsletter", and a Sort Key of "email".
• Deploy this app however you prefer, you could use Up for example
• Define the required environment variables:
  • TOKEN_SECRET: The secret used for signing unsubscribe tokens
  • API_TOKEN: The API token used to secure sensitive routes (GET /subscribers)
  • SUBSCRIBE_REDIRECT_URL: The redirect URL used for a successful subscription (thank you page)
  • UNSUBSCRIBE_REDIRECT_URL: The redirect URL used for a successful unsubscribe (bye bye page)
  • DYNAMO_TABLE: An optional table name, defaults to "news"

The API_TOKEN is used to restrict access to sensitive routes. You can specify it as the Basic Auth password, no username is necessary, for example:

$ export API_TOKEN=hello
$ go run main.go &
$ curl -u :slothy localhost:3000/subscribers?newsletter=blog

This project is sponsored by my GitHub sponsors: