If you are using heroku and if you have enabled https then site must be redirected to use www . It means all Rails applications should ensure that “no-www” urls are redirected to “www”.

In Rails3 it is pretty easy to do. Here is how it can be done.

Bigbinary::Application.routes.draw do

  constraints(:host => /^bigbinary.com/) do
    root :to => redirect("http://www.bigbinary.com")
    match '/*path', :to => redirect {|params| "http://www.bigbinary.com/#{params[:path]}"}