1

次のコードがあります。

application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery

  before_filter :current_user

  def facebook_cookies
    @facebook_cookies ||= Koala::Facebook::OAuth.new.get_user_info_from_cookie(cookies).symbolize_keys!
  end

  def current_user
    begin
      # allow for ?access_token=[TOKEN] for iOS calls.
      @access_token = params[:access_token] || facebook_cookies[:access_token]
      @graph = Koala::Facebook::API.new(@access_token)
      # TODO: move this to session[:current_user]..
      @current_user ||= User.from_graph @graph.get_object('me', { fields: 'id,first_name,last_name,gender,birthday' })
    rescue
      nil # not logged in
    end
  end

  def authenticate
    redirect_to(root_url) if current_user.nil?
  end
end

(ここで説明されているようにコアラをセットアップしましたhttps://github.com/arsduo/koala/wiki/Koala-on-Rails )

私がやろうとしていることはかなり単純なので、OmniAuth を紹介したくはありません。上記のコードは機能しますが、問題は、ページの読み込みごとに Facebook を呼び出していることです = よくありません。ユーザーが認証された後、保存session[:user_id]してから、後続の各リクエストを呼び出す必要があると思いますか?User.find(session[:user_id])

これを解決する最も効率的な方法を誰かが提案できますか?

4

2 に答える 2

4

次のようなことを試すことができます：

class ApplicationController < ActionController::Base
  protect_from_forgery

  before_filter :current_user, if: Proc.new{ !current_user? }

  def facebook_cookies
    @facebook_cookies ||= Koala::Facebook::OAuth.new.get_user_info_from_cookie(cookies).symbolize_keys!
  end

  def current_user
    begin
      # allow for ?access_token=[TOKEN] for iOS calls.
      @access_token = params[:access_token] || facebook_cookies[:access_token]
      @graph = Koala::Facebook::API.new(@access_token)
      # TODO: move this to session[:current_user]..
      @current_user ||= User.from_graph @graph.get_object('me', { fields: 'id,first_name,last_name,gender,birthday' })
    rescue
      nil # not logged in
    end
  end

  def authenticate
    redirect_to(root_url) if current_user.nil?
  end

  def current_user?
    !!@current_user
  end
end
于 2012-07-04T16:05:13.980 に答える
0

Facebookの認証と承認に使用する実装があります。コードは、状態を変更しないメソッドと状態を変更するメソッドに分かれています。

コードはご自由にお使いください。

## checks if we have access to fb_info and it is not expired
## Non stagechanging
def oauth_is_online
  return !(session[:fb_cookies].nil? or session[:fb_cookies]['issued_at'].to_i + session[:fb_cookies]['expires'].to_i < Time.now.to_i - 10)
end

## checks if the user is in the database
## Non stats changing
def oauth_is_in_database
  return oauth_is_online && 0 < User.where(:fb_id => session[:fb_cookies]['user_id']).count
end

## Returns true if it is the specified user
## Non stagechanging
def oauth_is_user(user)
  return oauth_is_online && session[:fb_cookies]['user_id'] == user.fb_id
end

## Requires the user to be online. If not, hell breaks loose.
def oauth_require_online
  if !oauth_ensure_online
    render :file => "public/401.html", :status => :unauthorized, :layout => false
    return false
  end
  return session[:fb_cookies]
end

## Requires the user to be online and the correct user. If not, hell breaks loose.
def oauth_require_user(user)
  c = oauth_require_online
  return false unless c
  return c unless !oauth_is_user(user)
  render :file => "public/403.html", :status => :unauthorized, :layout => false
  return false
end


## Ensures that the user is online  
def oauth_ensure_online
  begin
    # Checks if the user can be verified af online
    if !oauth_is_in_database
      # the user is not online. Now make sure that they becomes online.
      logger.info "Creates new FB Oauth cookies"
      fb_cookies = Koala::Facebook::OAuth.new.get_user_info_from_cookie(cookies)

      # TODO In the future the session should be reset at this point
      # reset_session
      session[:fb_cookies_reload] = false
      session[:fb_cookies] = fb_cookies

      logger.info "Updating user in database."

      # Tries to load the user
      @current_user = User.where(:fb_id => session[:fb_cookies]['user_id']).first
      logger.info "User exists? => #{@current_user.nil?}"

      # creating if not found
      @current_user = User.new(:fb_id => session[:fb_cookies]['user_id']) unless !@current_user.nil?

      # Loading graph
      @fb_graph = Koala::Facebook::API.new(session[:fb_cookies]['access_token'])

      # Loading info from graph
      me = @fb_graph.get_object('me')

      @current_user.name_first = me['first_name'].to_s
      @current_user.name_last = me['last_name'].to_s
      @current_user.email = me['email'].to_s
      @current_user.fb_access_token = session[:fb_cookies]['access_token'].to_s

      # Saving the updated user
      @current_user.save!
      return oauth_is_online
    else
      # the user is online. Load variables.
      @current_user = User.where(:fb_id => session[:fb_cookies]['user_id']).first
      @fb_graph = Koala::Facebook::API.new(@current_user.fb_access_token)
    end
    return oauth_is_online
  rescue Koala::Facebook::OAuthTokenRequestError => oe
    ## TODO handle the diferent errors
    # user is not online on facebook
    # user have not authenticatet us
    # token is used allready once.
    logger.debug "FB koala OAuthTokenRequestError: #{oe}"
    return false
  end
end
于 2013-02-25T12:17:56.520 に答える