它允许您在控制器中指定哪些操作应通过https提供,哪些操作可以通过https提供.然后,它将重新定位从http到https,反之亦然.

从文档：

class ApplicationController < ActiveRecord::Base
  include SslRequirement
end
 
class AccountController < ApplicationController
  ssl_required :signup,:payment
  ssl_allowed :index
 
  def signup
    # Non-SSL access will be redirected to SSL
  end
 
  def payment
    # Non-SSL access will be redirected to SSL
  end
 
  def index
    # This action will work either with or without SSL
  end
 
  def other
    # SSL access will be redirected to non-SSL
  end
end