php如何实现ACL

-- ACL Tables
-- 表的结构 `aclresources`
DROP TABLE IF EXISTS `aclresources`;
CREATE TABLE IF NOT EXISTS `aclresources` (
`rsid` varchar(64) NOT NULL ,
`access` int(4) NOT NULL default 0,
`desc` varchar(240) NOT NULL default '',
`created_at` int(10) unsigned NOT NULL default 1,
`updated_at` int(10) unsigned NOT NULL default 0,
PRIMARY KEY (`rsid`)
)DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
-- 表的结构 `aclroles`
DROP TABLE IF EXISTS `aclroles`;
CREATE TABLE IF NOT EXISTS `aclroles` (
`id` int(10) unsigned NOT NULL auto_increment,
`rolename` varchar(32) NOT NULL ,
`desc` varchar(240) NOT NULL default '',
`created_at` int(10) unsigned NOT NULL default 1,
`updated_at` int(10) unsigned NOT NULL default 0,
PRIMARY KEY (`id`),
UNIQUE KEY `rolename` (`rolename`)
)DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
-- 表的结构 `ref_aclresources_aclroles`
DROP TABLE IF EXISTS `ref_aclresources_aclroles`;
CREATE TABLE IF NOT EXISTS `ref_aclresources_aclroles` (
`rsid` varchar(64) NOT NULL ,
`role_id` int(10) unsigned NOT NULL ,
PRIMARY KEY (`rsid`,`role_id`)
)DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
-- 表的结构 `ref_users_aclroles`
DROP TABLE IF EXISTS `ref_users_aclroles`;
CREATE TABLE IF NOT EXISTS `ref_users_aclroles` (
`user_id` int(10) unsigned NOT NULL auto_increment,
`role_id` int(10) unsigned NOT NULL ,
PRIMARY KEY (`user_id`,`role_id`)
)DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
-- 表的结构 `users`
DROP TABLE IF EXISTS `users`;
CREATE TABLE `users` (
`id` int(10) unsigned NOT NULL auto_increment,
`email` varchar(128) NOT NULL,
`password` varchar(64) NOT NULL,
`nickname` varchar(32) NOT NULL default '',
`roles` varchar(240) NOT NULL default '',
`created_at` int(10) unsigned NOT NULL default 1,
`updated_at` int(10) unsigned NOT NULL default 0,
PRIMARY KEY (`id`),
UNIQUE KEY `user_email` (`email`)
)DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

<?php
/**
* 简单的 ACL 权限控制功能
*
* 表定义
*
* 1. 资源定义 (rsid,access,desc,created_at,updated_at)
* 2. 角色定义 (id,rolename,desc,created_at,updated_at)
* 3. 资源-角色关联 (rsid,role_id)
* 4. 用户-角色关联 (user_id,role_id)
*
* 依赖db.php sqlobject.php
*
* @author vb2005xu.iteye.com
*/
class AclBase {
// --- ACL 访问授权

/**
* 不允许任何人访问
*/
const NOBODY = 0;

/**
* 允许任何人访问
*/
const EVERYONE = 1;

/**
* 允许 拥有角色的用户访问
*/
const HAS_ROLE = 2;

/**
* 允许 不带有角色的用户访问
*/
const NO_ROLE = 3;
/**
* 在 资源-角色关联 定义的 角色才能访问
*/
const ALLOCATE_ROLES = 4;

// 定义相关的 表名
public $tbResources = 'aclresources';
public $tbRoles = 'aclroles';
public $tbRefResourcesRoles = 'ref_aclresources_aclroles';
public $tbRefUsersRoles = 'ref_users_aclroles';

/**
* 格式化 资源的访问权限并返回
*
* @return int
*/
static function formatAccessValue($access){
static $arr = array(self::NOBODY,self::EVERYONE,self::HAS_ROLE,self::NO_ROLE,self::ALLOCATE_ROLES);
return in_array($access,$arr) ? $access : self::NOBODY;
}

/**
* 创建资源,返回资源记录主键
*
* @param string $rsid
* @param int $access
* @param string $desc
*
* @return int
*/
function createResource($rsid,$access,$desc){
if (empty($rsid)) return false;

$resource = array(
'rsid' => $rsid,
'access' => self::formatAccessValue($access),
'desc' => $desc,
'created_at' => CURRENT_TIMESTAMP
);

return SingleTableCRUD::insert($this->tbResources,$resource);
}

/**
* 修改资源,返回成功状态
*
* @param array $resource
* @return int
*/
function updateResource(array $resource){
if (!isset($resource['rsid'])) return false;

$resource['updated_at'] = CURRENT_TIMESTAMP;

return SingleTableCRUD::update($this->tbResources,$resource,'rsid');
}

/**
* 删除资源
*
* @param string $rsid
* @return int
*/
function deleteResource($rsid){
if (empty($rsid)) return false;
return SingleTableCRUD::delete($this->tbResources,array('rsid'=>$rsid));
}

/**
* 创建角色,返回角色记录主键
*
* @param string $rolename
* @param string $desc
*
* @return int
*/
function createRole($rolename,$desc){
if (empty($rolename)) return false;

$role = array(
'rolename' => $rolename,
'desc' => $desc,
'created_at' => CURRENT_TIMESTAMP
);

return SingleTableCRUD::insert($this->tbRoles,$role);
}

/**
* 修改角色,返回成功状态
*
* @param array $role
* @return int
*/
function updateRole(array $role){
if (!isset($role['id'])) return false;

if (isset($role['rolename'])) unset($role['rolename']);
$role['updated_at'] = CURRENT_TIMESTAMP;

return SingleTableCRUD::update($this->tbRoles,$role,'id');
}

/**
* 删除角色
*
* @param int $role_id
* @return int
*/
function deleteRole($role_id){
if (empty($role_id)) return false;
return SingleTableCRUD::delete($this->tbRoles,array('role_id'=>(int) $role_id));
}

/**
* 为资源指定角色,每次均先全部移除表中相关记录再插入
*
* @param int $rsid
* @param mixed $roleIds
* @param boolean $setNull 当角色id不存在时,是否将资源从关联表中清空
*/
function allocateRolesForResource($rsid,$roleIds,$setNull=false,$defaultAccess=-1){
if (empty($rsid)) return false;

$roleIds = normalize($roleIds,',');
if (empty($roleIds)){
if ($setNull){
SingleTableCRUD::delete($this->tbRefResourcesRoles,array('rsid'=>$rsid));

if ($defaultAccess != -1){
$defaultAccess = self::formatAccessValue($defaultAccess);
$this->updateResource(array('rsid'=>$rsid,'access'=>$defaultAccess));
}
return true;
}
return false;
}

SingleTableCRUD::delete($this->tbRefResourcesRoles,array('rsid'=>$rsid));

$roleIds = array_unique($roleIds);

foreach ($roleIds as $role_id){
SingleTableCRUD::insert($this->tbRefResourcesRoles,array('rsid'=>$rsid,'role_id'=>(int)$role_id));
}
return true;
}

function cleanRolesForResource($rsid){
if (empty($rsid)) return false;
return SingleTableCRUD::delete($this->tbRefResourcesRoles,array('rsid'=>$rsid));
}

function cleanResourcesForRole($role_id){
if (empty($role_id)) return false;
return SingleTableCRUD::delete($this->tbRefResourcesRoles,array('role_id'=>(int) $role_id));
}

/**
* 为角色分配资源,每次均先全部移除表中相关记录再插入
*
* @param int $role_id
* @param mixed $rsids
*
* @return boolean
*/
function allocateResourcesForRole($role_id,$rsids){
if (empty($role_id)) return false;

$role_id = (int) $role_id;
$rsids = normalize($rsids,',');
if (empty($rsids)){
return false;
}

SingleTableCRUD::delete($this->tbRefResourcesRoles,array('role_id'=>$role_id));

$rsids = array_unique($rsids);

foreach ($rsids as $rsid){
SingleTableCRUD::insert($this->tbRefResourcesRoles,array('rsid'=>$rsid,'role_id'=>$role_id));
}
return true;
}

/**
* 为用户指派角色,每次均先全部移除表中相关记录再插入
*
* 此处在用户很多的时候可能会有性能问题 ... 后面再想怎么优化
*
* @param int $user_id
* @param mixed $roleIds
*
* @return boolean
*/
function allocateRolesForUser($user_id,$roleIds){
if (empty($user_id)) return false;

$user_id = (int) $user_id;
$roleIds = normalize($roleIds,',');
if (empty($roleIds)){
return false;
}

SingleTableCRUD::delete($this->tbRefUsersRoles,array('user_id'=>$user_id));

$roleIds = array_unique($roleIds);

foreach ($roleIds as $roleId){
SingleTableCRUD::insert($this->tbRefUsersRoles,array('user_id'=>$user_id,'role_id'=>$role_id));
}
return true;
}

/**
* 清除用户的角色信息
*
* @param int $user_id
*
* @return boolean
*/
function cleanRolesForUser($user_id){
if (empty($user_id)) return false;
return SingleTableCRUD::delete($this->tbRefUsersRoles,array('user_id'=>(int) $user_id));
}

/**
* 清除角色的用户关联
*
* @param int $role_id
*
* @return boolean
*/
function cleanUsersForRole($role_id){
if (empty($role_id)) return false;
return SingleTableCRUD::delete($this->tbRefUsersRoles,array('role_id'=>(int) $role_id));
}

}

/**
* 对资源进行acl校验
*
* @param string $rsid 资源标识
* @param array $user 特定用户,不指定则校验当前用户
*
* @return boolean
*/
function aclVerity($rsid ,array $user = null){

if (empty($rsid)) return false;
if (!CoreApp::$defaultAcl) {
CoreApp::$defaultAcl = new AclFlat();
}

$rsRow = aclGetResource($rsid);

// 未定义资源的缺省访问策略
if (!$rsRow) return false;

CoreApp::writeLog($rsRow,'test');

$rsRow['access'] = AclBase::formatAccessValue($rsRow['access']);

// 允许任何人访问
if (AclBase::EVERYONE == $rsRow['access']) return true;

// 不允许任何人访问
if (AclBase::NOBODY == $rsRow['access']) return false;

// 获取用户信息
if (empty($user)) $user = isset($_SESSION['SI-SysUser']) ? $_SESSION['SI-SysUser'] : null;

// 用户未登录,则当成无访问权限
if (empty($user)) return false;

$user['roles'] = empty($user['roles']) ? null : normalize($user['roles'],';');

$userHasRoles = !empty($user['roles']);

/**
* 允许 不带有角色的用户访问
*/
if (AclBase::NO_ROLE == $rsRow['access']) return $userHasRoles ? false : true;

/**
* 允许 带有角色的用户访问
*/
if (AclBase::HAS_ROLE == $rsRow['access']) return $userHasRoles ? true : false;

// --- 对用户进行 资源 <-> 角色 校验
if ($userHasRoles){
foreach ($user['roles'] as $role_id){
if ( aclGetRefResourcesRoles($rsid,$role_id) )
return true;
}
dump($user);
}
return false;
}