在Rails中从Google/Yahoo检索OpenID AX属性

我正在使用rails插件 open_id_authentication 在我的应用程序中。这适用于MyOpenID,但是通过Google身份验证,我无法将电子邮件地址作为所需属性的一部分。

据我所知,Google忽略了sreg属性请求,只监听电子邮件地址的AX模式。

这是我的密码:

     def open_id_authentication(openid_url)

       #google only responds to AX for email, so we must provide that also
       authenticate_with_open_id(openid_url, :required => [:nickname, :email, 'http://axschema.org/contact/email']) do |result, identity_url, registration|
        if result.successful?    
         @user = User.find_or_initialize_by_identity_url(identity_url)
         if @user.new_record?            
             unless registration['email'] || registration['http://axschema.org/contact/email']          
                 failed_login "Your OpenID provider didn't send us an email address."
                 return
              end

          #some providers (like Google) won't send a nick name.  We'll use email instead for those
          nick = registration['nickname']
          nick |= registration['email']
          nick |= registration['http://axschema.org/contact/email']

          email = registration['email'];
          email |= registration['http://axschema.org/contact/email']

          @user.login = nick
          @user.email = email
          @user.save(false)
     end
     self.current_user = @user
     successful_login
    else
       failed_login result.message
    end
   end

registration 随响应一起传递的实例。

我处理得不对吗?如何从谷歌获取用户的电子邮件地址?为了支持雅虎,我还需要跳出其他障碍吗?