Simple Sinatra-based URL shortener

• Ruby 2.6
• A rack-compatible webserver
• A database. The app uses Postgres, but it is also build on ActiveRecord. So, any adapter they support is fine; just change the Gemfile

• bundle install
• copy config/database.yml.example to config/database.yml and modify to suit
• copy config/application.yml.example to config/application.yml and modify to suit (see below)
• bundle exec rackup

Set the following environment variables. They can be set in .env in development:

• DEFAULT_URL: This is your default website. If the shortener can't find a short-url for the requiested slug, it will redirect to that page on your default site.
• SECRET: Optional, this secret must be present in the request as "key" in order for a POST request to be allowed. If you ommit it, everyone is allowed to shorten URLs on your site.

GET requests to /slug will redirect to the URL with that slug if found. If not found, you'll be redirected to /slug at the default site.

POST requests to / will create a redirect. the url (and, if required key) can be in the params (form data) or in the body of the request as JSON

(Change the POST location and change or remove your key)

javascript:(function(){var e=new XMLHttpRequest;e.addEventListener("load",function(){console.log(this.responseText)}),e.open("POST","https://exmpl.co/",!0),e.setRequestHeader("Content-Type","application/json"),e.send(JSON.stringify({key:"ASecretKey",url:window.location.href}))}())

This is a minified version of the script in contrib/shorten.js

There's a rudementary console: bundle exec script/console

Inspiration for the application is largely from https://github.com/mathiasbynens/php-url-shortener