Shorten long links using DigitalOcean Functions and an S3 backend

Support for direct installation only (App Platform TODO)

• In the DO Functions console, create a new Namespace.
• Create two new functions, both using the same package name (app). Make sure Web Function is checked.
  • create
  • r

Edit the create function

• In the source code box, paste the contents of packages/app/create/__main__.py
• Set the runtime to the latest Python version
• Set the limits to 3 sec timeout, 128 MB memory
• Add 4 environment variables and set the values appropriately
  • wasabi_accesskey: Access key for bucket
  • wasabi_secretkey: Secret key for bucket
  • wasabi_bucket: Bucket name
  • token: Auth token to protect this function from unauthorized use
• Save

Edit the r function

• In the source code box, paste the contents of packages/app/r/__main__.py
• Repeat all of the remaining steps from the create function except adding the token environment variable.

To create a new shortened link

<FunctionURL>/app/create?u=<long-link>&t=<token>

URL Parameters

• u: The link to shorten
• t: The access token specified in the Installation for the create function.
• p: An optional parameter that when set to the value echo, will return the shortened link as well as information about the request.

The return value will be the shortened link (in the form <FunctionURL>/app/r?c=<code>), a 502 HTTP code in case of an incorrect token, or an error message. Use the returned link as you would any ordinary link.

The r function has the form

<FunctionURL>/app/r?c=<code>

URL Parameters

• c: The short code that will redirect to the designated target address

If there is an error, a 500 HTTP code will be returned.