title: How to use external APIs in Rails?
body: <p>I'm tring to use an external API, but found no clue of it.</p>
  
  <p><a href="http://open.youku.com/docs/api/videos/show_basic" rel="nofollow noreferrer">http://open.youku.com/docs/api/videos/show_basic</a></p>
  
  <p>It seems like I have to build sth from scratch, so How can I start? Is there any example using external API that I can refer to? </p>
  
  <p>I just find these maybe helpful:
  <a href="http://railscasts.com/episodes/361-facebook-graph-api" rel="nofollow noreferrer">http://railscasts.com/episodes/361-facebook-graph-api</a></p>
  
  <p><a href="https://stackoverflow.com/questions/12379834/what-is-the-first-step-to-using-a-rest-api-in-rails">What is the first step to using a REST API in Rails?</a></p>