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
    root :to => redirect {|params, req| URI.escape(req.query_string.present? ? "#{req.protocol}www.#{host}?#{req.query_string}" : "#{req.protocol}www.#{host}") }
    match '/*path', :to => redirect {|params, req| URI.escape(req.query_string.present? ? "#{req.protocol}www.#{host}/#{params[:path]}?#{req.query_string}" : "#{req.protocol}www.#{host}/#{params[:path]}") }
  end
end


# Multiple domain redirect
['host-1.com', 'host-2.com'].each do |host|
  constraints(:host => host) do
    root :to => redirect {|params, req| URI.escape(req.query_string.present? ? "#{req.protocol}www.#{host}?#{req.query_string}" : "#{req.protocol}www.#{host}") }
    match '/*path', :to => redirect {|params, req| URI.escape(req.query_string.present? ? "#{req.protocol}www.#{host}/#{params[:path]}?#{req.query_string}" : "#{req.protocol}www.#{host}/#{params[:path]}") }
  end
end