Rails:从URL解析路由信息

###在Rails 3中,您可以执行以下操作:
Rails.application.routes.recognize_path "/accounts/1"
# {:action=>"show", :controller=>"accounts", :id=>"1"}

　　

### 默认method => get
url = ActionController::Routing::Routes.recognize_path("/accounts/1",:method=>:get)`
# {:action=>"show":controller=>"accounts",:id=>"1"}

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### 默认method => get

url = Rails.application.routes.recognize_path(request.referrer, method: "get")

last_controller = url[:controller]

last_action = url[:action]