Rails 3 gem for capturing referrer info?

Is there a single (or multiple) Rails gem that will help to easily capture the following on a when registering a new model instance (i.e.: new user)?

• referrer URL
• traffic source (google, bing, etc.)
• traffic medium (organic, cpc)
• search terms (if user came from a search engine)

I know I could code this in manually, but no reason to recreate this if it's 开发者_如何转开发already done.

The only thing I could find through searching is search_sniffer, but that's a plugin, and I'd prefer to use a gem if available.

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I ended up solving this on my own without a gem. In case anyone is interested, I wrote a blog post explaining how I did it.

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Referrer tracks sources with which users visit your site, converts them into utm markup, computes priority of these sources and provides linking for sources with tracked model's records (orders/requests/etc). Rails 4, 5 supported.