Rails 3: What's needed to integrate with a REST API?

What do I need to have in my app in order to do GET, PUT, etc requests to a public REST API that answers with JSON?

I'm a little confus开发者_运维百科ed with that.

Thanks!

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ActiveResource was made for that. You can use the format= to make it parse JSON:

class User < ActiveResource::Base
      self.format = :json
      #...
end