Detect user agent in Rails 4 - read HTTP header

ruby-on-rails ruby http-headers ruby-on-rails-4 user-agent
Severin picture Severin · Oct 23, 2013 · Viewed 23.7k times · Source

I just switched from PHP to Ruby on Rails and was wondering if there was a way to detect the clients device/user agent (reading the HTTP header) in order to serve different versions of the site depending on the request it gets. In PHP I have been using Mobile Detect to do so. The general idea is to only serve files that are needed for each particular version. Thats why a client side approach is not that effective.

Is there a way to do something similar with Ruby 2.0.0 and Rails 4.0.0 ?

Maybe there is a gem to handle cases like that?

Answer

Paulo Fidalgo picture Paulo Fidalgo · Oct 24, 2013

Check the request method, where you can get a ActionDispatch::Request where you have all the request parameters, including the user agent.

request.user_agent

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