Rails3 way to redirect non-www domain to www domain

gistfile1.rb

# Rails3 way to redirect non-www domain to www domain

# Single domain redirect
'example.com'.tap do |host|
  constraints(:host => host) do
    match '/(*path)', :to => redirect { |params, request| Addressable::URI.escape request.url.sub(host, "www.#{host}") }
  end
end


# Multiple domain redirect
['host-1.com', 'host-2.com'].each do |host|
  constraints(:host => host) do
    match '/(*path)', :to => redirect { |params, request| Addressable::URI.escape request.url.sub(host, "www.#{host}") }
  end
end