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

There is a better Rails 3 way - put this in your routes.rb file:

  constraints(:host => "example.com") do
    # Won't match root path without brackets around "*x". (using Rails 3.0.3)
    match "(*x)" => redirect { |params, request|
      URI.parse(request.url).tap { |x| x.host = "www.example.com" }.to_s
    }
  end

Update

Here is how to make it domain agnostic:

  constraints(subdomain: '') do
    match "(*x)" => redirect do |params, request|
      URI.parse(request.url).tap { |x| x.host = "www.#{x.host}" }.to_s
    end
  end