谈谈自己对于Auth2.0的见解

　　Auth的原理网上有很多，我这里就不在赘述了。

　　这里有张时序图我个人觉得是比较合理而且直观的，（感谢这篇博文：http://justcoding.iteye.com/blog/1950270）

　　参照这个流程，模拟了下部分代码，当然是尽可能的以简单的形式去表达下自己的见解

　　模拟了配置文件去掉数据库处理的部分

config.php 定义了公司及对应的操作用户的权限

<?php
return array(
    'app'=>array(
        'a1'=>array(
        'accesskey'=>'123456',//凭证
        'type'=>0,//聚合这里规定type对应的请求权限
        'appname'=>'gavinjun',
        ),
    ),
    'type'=>array(
        array(
            '获取用户的信息','获取用户的金钱',
        ),
    ),
);

user_config.php 用户表的模拟

<?php
return array(
    'admin'=>'123456',
);

<?php 

//权限2.0的主程
class Auto{
    private $vession=2.0;
    private $notic=null;
    public function __construct(){
        $notic     =     require 'config.php';
        $this->notic = $notic;
    }
    //校验商户
    public function check($_param=array()){
        if(empty($_param)){
            return false;
        }
        //获取传过来的accesskey appid
        $appid = !empty($_param['appid'])?$_param['appid']:0;
        $accesskey=!empty($_param['accesskey'])?$_param['accesskey']:'';
        if(!$appid||!$accesskey)
            return false;
        //校验开始
        $notic  = $this->notic;
        return $notic['app'][$appid]?$notic['app'][$appid]['accesskey']==$accesskey:false;
    }
    //用户发起登录请求
    public function getLoginCallBack($_param){
        if($this->check($_param)){
            //校验通过返回临时的token 以下都是不安全的方式只是模拟auto的流程
            //这里可以用加密 请求时间|请求完成后跳转地址|用户的md5(accesskey)
            return time().'|'.$_param['redirect'].'|'.md5($_param['accesskey']).'|'.$_param['appid'];
        }else{
            echo '商户未注册';
            return false;
        }
    }

    //用户输入完用户名和密码之后
    public function inLogin($name,$pwd){
        $user = require("user_config.php");
        return $user[$name]?$user[$name]==$pwd:false;
    }
    //用户登录完成后带着token值来请求我们的令牌
    public function getAceess($_param){
        $token = $_param['access_token'];
        if(!$token)
            return false;
        list($time,$redirect,$authkey,$appid) = explode('|',$token);
        //请求$appid 获取他的accesskey
        $notic  = $this->notic;
        $accesskey = $notic['app'][$appid]['accesskey'];
        if(time()>$time+5*60){
            //超过5分钟才请求默认失败
            return false;
        }
        if(md5($accesskey)!=$authkey){
            //链接不安全
            return false;
        }
        //返回正式的key
        //这个key可以保存在数据库中设置这个key的失效时间 //我这里随便固定了他的accesskey
        //给跳转的页面发送一个key 用post的应该，不过模拟就算了
        $access = 'success';
        return $redirect.'?access='.$access;
    }

    public function doSomeByaccess($access){
        //和数据库中做比对 这里不写了，就全部默认成功
        if($access){
                $appid = 'a1';
        }
        $notic  = $this->notic;
        $type   = $notic['app'][$appid]['type'];
        foreach($notic['type'][$type] as $v){
            echo '用户权限：'.$v.'<br>';
        }

    }
}

这里是模拟下这段程序的流程

<?php
//模拟流程
require 'auth2.php';
$auth2= new Auto();

//step 1: 用户点击平台上的登录按钮
//该商户的信息 appid=a1，accesskey=123456
$step1=$auth2->getLoginCallBack(array('appid'=>'a1','accesskey'=>'123456','redirect'=>'http://www.baidu.com'));
//系统内部跳转到登录界面拿到临时token 让用户去登录授权
$access_token = $step1;
/**系统内部的处理流程***/
//系统跳到登录地址?access_token=$step1 用户输入用户名和密码
//模拟用户授权
if($auth2->inLogin('admin','123456')){
    //用户同意登录返回了一个令牌$access_token是用户登录请求的时候带上的
    $arr['access_token']=$access_token;
    $url = $auth2->getAceess($arr);
    //这个url会发送给平台，平台拿到这个 令牌可以去访问用户信息
    echo $url;
}
/****系统内部处理结束跳转到用户平台地址，发送post信息****/
//假设平台接到这个信息他保存下来了这个accesskey，去读取一遍用户的信息
$url = parse_url($url);
list($access,$accesskey)=explode('=',$url['query']);
$auth2->doSomeByaccess($accesskey);

结果：

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