Urlrog: URL Retrieval for Open Graph

To start the Phoenix server:

• Install dependencies with mix deps.get
• Start Phoenix endpoint with mix phx.server

Now you can visit localhost:4000 from your browser.

Also, try running tests with mix test

What you should know

• I did it in Phoenix. Live view seemed like a good match for the requirements, so I used a live view.
• No database. Why would this app need one?
• Using GenServer as a background processor. No need for Redis or Sidekiq, start up a GenServer thread to do the webscraping when the application starts
• The GenServer is stateful and caches the scraped value for each of the URLs you look up with it, so future requests should be faster.
• Updates via PubSub. Any listening LiveView that is looking for the thumbnail for the requested URL will receive the update.
• Using Application.get_env for test dependency injection, meaning we don't get slowdowns or errors from attempts to call HTTPoison in test. This comes with a slight sacrifice to readability and click-through-ability, but is still pretty cool. Another approach this would be to use (Gestalt)[https://hex.pm/packages/gestalt]
• There are tests, ain't that great?