force_ssl (ActionController::ForceSSL::ClassMethods)

force_ssl (ActionController::ForceSSL::ClassMethods) - APIdock

Force the request to this particular controller or specified actions to be under HTTPS protocol. Note that this method will not be effective on development environment. Options only - The callback should be run only for this action <tt>except - The callback should be run for all actions except this action

Full article: http://apidock.com/rails/ActionController/ForceSSL/ClassM...