config<\/span>.<\/span>action_controller<\/span>.<\/span>asset_host<\/span> =<\/span> <\/div> Proc<\/span>.<\/span>new<\/span> {<\/span> |<\/span>source<\/span>|<\/span><\/div> if<\/span> source<\/span>.<\/span>start_with<\/span>(<\/span>'/images'<\/span>)<\/span><\/div> "images.example.com"<\/span><\/div> else<\/span><\/div> "assets.example.com"<\/span><\/div> end<\/span><\/div> }<\/span><\/div><\/pre><\/div>\n \n <\/div>\n\n