Rails Action Cable：如何授权传入连接？

Question

我正在尝试在 websocket 连接上实现授权 (rails 5.2.1)

继 rubyonrails guideline 之后，我创建了 connection.rb 如下：

#app/channels/application_cable/connection.rb

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user

    def connect
      self.current_user = find_verified_user
    end

    private
      def find_verified_user
        if verified_user = User.find_by(id: cookies.encrypted[:user_id])
          verified_user
        else
          reject_unauthorized_connection
        end
      end
  end
end

很遗憾，所有的websocket连接请求都被拒绝了。（我发现 cookies.encrypted[:user_id] 返回 nil。）

Started GET "/cable" for ::1 at 2018-10-07 21:33:46 +0300
Started GET "/cable/" [WebSocket] for ::1 at 2018-10-07 21:33:46 +0300
Successfully upgraded to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
  User Load (0.5ms)  SELECT  "users".* FROM "users" WHERE "users"."is_active" =  AND "users"."id" IS NULL LIMIT   [["is_active", true], ["LIMIT", 1]]
  ↳ app/channels/application_cable/connection.rb:12
An unauthorized connection attempt was rejected
Failed to upgrade to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
Finished "/cable/" [WebSocket] for ::1 at 2018-10-07 21:33:46 +0300
Finished "/cable/" [WebSocket] for ::1 at 2018-10-07 21:33:46 +0300

能否指导我如何访问 app/channels/application_cable/connection.rb 中的当前用户信息？

Answer 1

为了从 Devise 获得 current_user，您需要按如下方式更改 connection.rb：

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user

    def connect
      self.current_user = find_verified_user
      logger.add_tags 'ActionCable', current_user.email
    end

    protected

    def find_verified_user # this checks whether a user is authenticated with devise
      if verified_user = env['warden'].user
        verified_user
      else
        reject_unauthorized_connection
      end
    end
  end
end

Answer 2

我遇到了确切的问题。我解决它的方法是在用户通过 SessionsController < Devise::SessionsController 登录时添加一个 cookie。代码如下所示：

class Users::SessionsController < Devise::SessionsController
  # POST /resource/sign_in
  def create
    super
    cookies[:user_id] = current_user.id
  end
end

您可以通过运行代码从设计中获取 SessionsController：

rails generate devise:controllers [scope]

在我的例子中，范围是用户。

Answer 3

Rails 6:

cookies.encrypted[:user_id]

Rails 5:

cookies.signed[:user_id]

Rails Action Cable：如何授权传入连接？

Rails Action Cable: How to authorize incoming connection?

ruby-on-rails

ruby-on-rails-5

actioncable