A Representational State Transfer (REST) web service service is another kind of web service standard. REST does not necessarily use WSDL or SOAP messaging, but can be called directly by using methods like
GET and other HTTP operations. So we can call a REST service directly from a URL unlike SOAP. This makes testing a lot easier.
APEX developers can use REST web services and the wizard interface offers many possibilities for creating the call.
In this recipe, we are going to use the opportunities that APEX offers us to create a page based on a public REST web service; the popular photo application Flickr.
Before starting this tutorial, create a Flickr account at http://www.flickr.com and ...