title: Ruby on rails web services with POST request
body: <p>I've just started learning Ruby on rails and I am wondering how to do something that I know how to easily do in PHP.
  I want to create some basic web services that can be called with POST parameters and send a JSON as a response. I don't know at all how to start with that using Ruby on rails.</p>
  
  <p>I am sure there are some best practice to do that kind of things, so if you guys could advise me anything, it would be great!</p>
  
  <p>Regards,</p>