Shortening algorithm

id - short_code conversion is just a conversion into another base numeral system (in this case base-62), where each value 0-61 is mapped onto an alphabet.

The initial CHARACTERS array is shuffled with fixed RNG based on secret_key_base, so it persists between launches, and forms an alphabet.

short_code itself is not populated into the database. It is being calculated based on ShortUrl#id and vice versa.

Initial Setup

docker-compose build
docker-compose up mariadb
docker-compose run url-shortener-app rails db:migrate
docker-compose -f docker-compose-test.yml build

To run migrations

docker-compose run url-shortener-app rails db:migrate
docker-compose -f docker-compose-test.yml run url-shortener-rspec rails db:test:prepare

To run the specs

docker-compose -f docker-compose-test.yml run url-shortener-rspec

Run the web server

docker-compose up

Adding a URL

curl -X POST -d "full_url=https://google.com" http://localhost:3000/short_urls.json

Getting the top 100

curl localhost:3000

Checking your short URL redirect

curl -I localhost:3000/abc

DmitryArtyomov/url-shortener