Redirect non-www requests to www URLs in Ruby on Rails

Question

It is a simple issue, but I can\'t seem to find an answer doing some quick googling.

What\'s the Ruby on Rails way of doing this 301 direct (http://x.com/abc > http:

Answer 1

For rails 4, use it -

  before_filter :add_www_subdomain

  private
  def add_www_subdomain
    unless /^www/.match(request.host)
      redirect_to("#{request.protocol}www.#{request.host_with_port}",status: 301)
    end
  end