ruby-on-rails – 设计无视自定义策略

发布时间：2020-12-16 22:46:25 所属栏目：百科来源：网络整理

导读：这很奇怪. 我有Rails 3 RC运行与Devise安装.我已经定义了一个自定义策略来尝试使用Kerberos进行身份验证. module Devise module Strategies class Kerb Devise::Strategies::Base def valid? params[:username] || params[:password] end def authenticate!

这很奇怪.

我有Rails 3 RC运行与Devise安装.我已经定义了一个自定义策略来尝试使用Kerberos进行身份验证.

module Devise
  module Strategies
    class Kerb < Devise::Strategies::Base
      def valid?
        params[:username] || params[:password]
      end

      def authenticate!
        # cheap debugging
        puts "PARAMS: #{params}"

        if check_kerb_auth(params[:username],params[:password])
          # create user account if none exists
          u = User.find(:first,:conditions => { :username => params[:username] }) || User.create({ :username => login })
          success!(u)
        else
          fail!("Could not log in")
        end
      end

      def check_kerb_auth(username,password)
        require 'krb5_auth'
        include Krb5Auth

        return false if username.blank? or password.blank?

        begin
            kerberos = Krb5.new
            return kerberos.get_init_creds_password(username,password)
        rescue Krb5Auth::Krb5::Exception
            return false
        end
      end
    end
  end
end

我的Devise Warden配置设置如下：

config.warden do |manager|
  manager.strategies.add(:kerb,Devise::Strategies::Kerb)
  manager.default_strategies :kerb
end

我的日志中没有错误.一切似乎都行了.如果我添加了“廉价调试”一堆put语句,似乎反映出：路由策略是默认的.以下是登录尝试的一组日志记录：

=> Booting WEBrick
=> Rails 3.0.0.rc application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2010-08-17 10:50:35] INFO  WEBrick 1.3.1
[2010-08-17 10:50:35] INFO  ruby 1.8.7 (2010-01-10) [x86_64-linux]
[2010-08-17 10:50:40] INFO  WEBrick::HTTPServer#start: pid=12717 port=3000


Started POST "/users/login" for 127.0.0.1 at Tue Aug 17 10:50:43 -0400 2010
  Processing by Devise::SessionsController#create as HTML
  Parameters: {"commit"=>"Login","authenticity_token"=>"afZF6ho96p47dc9LQFwwNN5PqnRpl7x+1J7V3MiKgTE=","_snowman"=>"342230203","user"=>{"remember_me"=>"1","username"=>"hernan43","password"=>"[FILTERED]"}}
Completed   in 0ms
  Processing by Devise::SessionsController#new as HTML
  Parameters: {"commit"=>"Login","password"=>"[FILTERED]"}}
Rendered devise/shared/_links.erb (1.2ms)
Rendered devise/sessions/new.html.erb within layouts/application (8.2ms)
Completed 200 OK in 124ms (Views: 11.7ms | ActiveRecord: 1.3ms)

kerberos代码在同一台机器上的其他工作.我有一种期待它出现一堆错误,如果有一个问题,但我什么也没有.有没有好的方法来调试Devise / Warden？

解决方法

如果有人遇到这个问题,我相信这个问题是：

根据Warden Strategies：

valid?

The valid? method acts as a guard for the strategy. It’s optional to declare a valid? method,and if you don’t declare it,the strategy will always be run. If you do declare it though,the strategy will only be tried if #valid? evaluates to true.

The strategy above is reasoning that if there’s either a ‘username’ or a ‘password’ param,then the user is trying to login. If there’s only one of them,then the ‘User.authenticate’ call will fail,but it was still the desired (valid) strategy.

所以你有效的方法：

def valid?
  params[:username] || params[:password]
end

它返回false,所以认证！从来不叫params是一个嵌套哈希,所以它应该是params [：user] [：username],而不是params [：username].

将有效的方法更改为：

def valid?
  params[:user] && (params[:user][:username] || params[:user][:password])
end

将返回true并导致验证！要调用的方法

（编辑：李大同）

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