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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2011 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: luofei614 <weibo.com/luofei614> 
// +----------------------------------------------------------------------
namespace Think;
/**
* 权限认证类
* 功能特性:
* 1是对规则进行认证不是对节点进行认证。用户可以把节点当作规则名称实现对节点进行认证。
* $auth=new Auth(); $auth->check('规则名称','用户id')
* 2可以同时对多条规则进行认证并设置多条规则的关系or或者and
* $auth=new Auth(); $auth->check('规则1,规则2','用户id','and')
* 第三个参数为and时表示用户需要同时具有规则1和规则2的权限。 当第三个参数为or时表示用户值需要具备其中一个条件即可。默认为or
* 3一个用户可以属于多个用户组(think_auth_group_access表 定义了用户所属用户组)。我们需要设置每个用户组拥有哪些规则(think_auth_group 定义了用户组权限)
*
* 4支持规则表达式。
* 在think_auth_rule 表中定义一条规则时如果type为1 condition字段就可以定义规则表达式。 如定义{score}>5 and {score}<100 表示用户的分数在5-100之间时这条规则才会通过。
*/
//数据库
/*
-- ----------------------------
-- think_auth_rule规则表
-- id:主键name规则唯一标识, title规则中文名称 status 状态为1正常为0禁用condition规则表达式为空表示存在就验证不为空表示按照条件验证
-- ----------------------------
DROP TABLE IF EXISTS `think_auth_rule`;
CREATE TABLE `think_auth_rule` (
`id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
`name` char(80) NOT NULL DEFAULT '',
`title` char(20) NOT NULL DEFAULT '',
`type` tinyint(1) NOT NULL DEFAULT '1',
`status` tinyint(1) NOT NULL DEFAULT '1',
`condition` char(100) NOT NULL DEFAULT '', # 规则附件条件,满足附加条件的规则,才认为是有效的规则
PRIMARY KEY (`id`),
UNIQUE KEY `name` (`name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
-- ----------------------------
-- think_auth_group 用户组表,
-- id主键 title:用户组中文名称, rules用户组拥有的规则id 多个规则","隔开status 状态为1正常为0禁用
-- ----------------------------
DROP TABLE IF EXISTS `think_auth_group`;
CREATE TABLE `think_auth_group` (
`id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
`title` char(100) NOT NULL DEFAULT '',
`status` tinyint(1) NOT NULL DEFAULT '1',
`rules` char(80) NOT NULL DEFAULT '',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
-- ----------------------------
-- think_auth_group_access 用户组明细表
-- uid:用户idgroup_id用户组id
-- ----------------------------
DROP TABLE IF EXISTS `think_auth_group_access`;
CREATE TABLE `think_auth_group_access` (
`uid` mediumint(8) unsigned NOT NULL,
`group_id` mediumint(8) unsigned NOT NULL,
UNIQUE KEY `uid_group_id` (`uid`,`group_id`),
KEY `uid` (`uid`),
KEY `group_id` (`group_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
*/
class Auth{
//默认配置
protected $_config = array(
'AUTH_ON' => true, // 认证开关
'AUTH_TYPE' => 1, // 认证方式1为实时认证2为登录认证。
'AUTH_GROUP' => 'auth_group', // 用户组数据表名
'AUTH_GROUP_ACCESS' => 'auth_group_access', // 用户-用户组关系表
'AUTH_RULE' => 'auth_rule', // 权限规则表
'AUTH_USER' => 'member' // 用户信息表
);
public function __construct() {
$prefix = C('DB_PREFIX');
$this->_config['AUTH_GROUP'] = $prefix.$this->_config['AUTH_GROUP'];
$this->_config['AUTH_RULE'] = $prefix.$this->_config['AUTH_RULE'];
$this->_config['AUTH_USER'] = $prefix.$this->_config['AUTH_USER'];
$this->_config['AUTH_GROUP_ACCESS'] = $prefix.$this->_config['AUTH_GROUP_ACCESS'];
if (C('AUTH_CONFIG')) {
//可设置配置项 AUTH_CONFIG, 此配置项为数组。
$this->_config = array_merge($this->_config, C('AUTH_CONFIG'));
}
}
/**
* 检查权限
* @param name string|array 需要验证的规则列表,支持逗号分隔的权限规则或索引数组
* @param uid int 认证用户的id
* @param string mode 执行check的模式
* @param relation string 如果为 'or' 表示满足任一条规则即通过验证;如果为 'and'则表示需满足所有规则才能通过验证
* @return boolean 通过验证返回true;失败返回false
*/
public function check($name, $uid, $type=1, $mode='url', $relation='or') {
if (!$this->_config['AUTH_ON'])
return true;
$authList = $this->getAuthList($uid,$type); //获取用户需要验证的所有有效规则列表
if (is_string($name)) {
$name = strtolower($name);
if (strpos($name, ',') !== false) {
$name = explode(',', $name);
} else {
$name = array($name);
}
}
$list = array(); //保存验证通过的规则名
if ($mode=='url') {
$REQUEST = unserialize( strtolower(serialize($_REQUEST)) );
}
foreach ( $authList as $auth ) {
$query = preg_replace('/^.+\?/U','',$auth);
if ($mode=='url' && $query!=$auth ) {
parse_str($query,$param); //解析规则中的param
$intersect = array_intersect_assoc($REQUEST,$param);
$auth = preg_replace('/\?.*$/U','',$auth);
if ( in_array($auth,$name) && $intersect==$param ) { //如果节点相符且url参数满足
$list[] = $auth ;
}
}else if (in_array($auth , $name)){
$list[] = $auth ;
}
}
if ($relation == 'or' and !empty($list)) {
return true;
}
$diff = array_diff($name, $list);
if ($relation == 'and' and empty($diff)) {
return true;
}
return false;
}
/**
* 根据用户id获取用户组,返回值为数组
* @param uid int 用户id
* @return array 用户所属的用户组 array(
* array('uid'=>'用户id','group_id'=>'用户组id','title'=>'用户组名称','rules'=>'用户组拥有的规则id,多个,号隔开'),
* ...)
*/
public function getGroups($uid) {
static $groups = array();
if (isset($groups[$uid]))
return $groups[$uid];
$user_groups = M()
->table($this->_config['AUTH_GROUP_ACCESS'] . ' a')
->where("a.uid='$uid' and g.status='1'")
->join($this->_config['AUTH_GROUP']." g on a.group_id=g.id")
->field('uid,group_id,title,rules')->select();
$groups[$uid]=$user_groups?:array();
return $groups[$uid];
}
/**
* 获得权限列表
* @param integer $uid 用户id
* @param integer $type
*/
protected function getAuthList($uid,$type) {
static $_authList = array(); //保存用户验证通过的权限列表
$t = implode(',',(array)$type);
if (isset($_authList[$uid.$t])) {
return $_authList[$uid.$t];
}
if( $this->_config['AUTH_TYPE']==2 && isset($_SESSION['_AUTH_LIST_'.$uid.$t])){
return $_SESSION['_AUTH_LIST_'.$uid.$t];
}
//读取用户所属用户组
$groups = $this->getGroups($uid);
$ids = array();//保存用户所属用户组设置的所有权限规则id
foreach ($groups as $g) {
$ids = array_merge($ids, explode(',', trim($g['rules'], ',')));
}
$ids = array_unique($ids);
if (empty($ids)) {
$_authList[$uid.$t] = array();
return array();
}
$map=array(
'id'=>array('in',$ids),
'type'=>$type,
'status'=>1,
);
//读取用户组所有权限规则
$rules = M()->table($this->_config['AUTH_RULE'])->where($map)->field('condition,name')->select();
//循环规则,判断结果。
$authList = array(); //
foreach ($rules as $rule) {
if (!empty($rule['condition'])) { //根据condition进行验证
$user = $this->getUserInfo($uid);//获取用户信息,一维数组
$command = preg_replace('/\{(\w*?)\}/', '$user[\'\\1\']', $rule['condition']);
//dump($command);//debug
@(eval('$condition=(' . $command . ');'));
if ($condition) {
$authList[] = strtolower($rule['name']);
}
} else {
//只要存在就记录
$authList[] = strtolower($rule['name']);
}
}
$_authList[$uid.$t] = $authList;
if($this->_config['AUTH_TYPE']==2){
//规则列表结果保存到session
$_SESSION['_AUTH_LIST_'.$uid.$t]=$authList;
}
return array_unique($authList);
}
/**
* 获得用户资料,根据自己的情况读取数据库
*/
protected function getUserInfo($uid) {
static $userinfo=array();
if(!isset($userinfo[$uid])){
$userinfo[$uid]=M()->where(array('uid'=>$uid))->table($this->_config['AUTH_USER'])->find();
}
return $userinfo[$uid];
}
}