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181 rader
5.7 KiB
181 rader
5.7 KiB
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Cache\Driver;
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use Think\Cache;
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defined('THINK_PATH') or exit();
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/**
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* 文件类型缓存类
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*/
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class File extends Cache {
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/**
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* 架构函数
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* @access public
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*/
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public function __construct($options=array()) {
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if(!empty($options)) {
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$this->options = $options;
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}
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$this->options['temp'] = !empty($options['temp'])? $options['temp'] : C('DATA_CACHE_PATH');
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$this->options['prefix'] = isset($options['prefix'])? $options['prefix'] : C('DATA_CACHE_PREFIX');
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$this->options['expire'] = isset($options['expire'])? $options['expire'] : C('DATA_CACHE_TIME');
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$this->options['length'] = isset($options['length'])? $options['length'] : 0;
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if(substr($this->options['temp'], -1) != '/') $this->options['temp'] .= '/';
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$this->init();
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}
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/**
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* 初始化检查
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* @access private
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* @return boolean
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*/
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private function init() {
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// 创建应用缓存目录
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if (!is_dir($this->options['temp'])) {
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mkdir($this->options['temp']);
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}
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}
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/**
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* 取得变量的存储文件名
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* @access private
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* @param string $name 缓存变量名
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* @return string
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*/
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private function filename($name) {
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$name = md5(C('DATA_CACHE_KEY').$name);
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if(C('DATA_CACHE_SUBDIR')) {
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// 使用子目录
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$dir ='';
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for($i=0;$i<C('DATA_PATH_LEVEL');$i++) {
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$dir .= $name[$i].'/';
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}
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if(!is_dir($this->options['temp'].$dir)) {
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mkdir($this->options['temp'].$dir,0755,true);
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}
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$filename = $dir.$this->options['prefix'].$name.'.php';
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}else{
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$filename = $this->options['prefix'].$name.'.php';
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}
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return $this->options['temp'].$filename;
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}
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/**
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* 读取缓存
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* @access public
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* @param string $name 缓存变量名
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* @return mixed
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*/
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public function get($name) {
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$filename = $this->filename($name);
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if (!is_file($filename)) {
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return false;
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}
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N('cache_read',1);
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$content = file_get_contents($filename);
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if( false !== $content) {
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$expire = (int)substr($content,8, 12);
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if($expire != 0 && time() > filemtime($filename) + $expire) {
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//缓存过期删除缓存文件
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unlink($filename);
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return false;
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}
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if(C('DATA_CACHE_CHECK')) {//开启数据校验
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$check = substr($content,20, 32);
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$content = substr($content,52, -3);
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if($check != md5($content)) {//校验错误
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return false;
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}
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}else {
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$content = substr($content,20, -3);
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}
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if(C('DATA_CACHE_COMPRESS') && function_exists('gzcompress')) {
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//启用数据压缩
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$content = gzuncompress($content);
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}
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$content = unserialize($content);
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return $content;
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}
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else {
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return false;
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}
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}
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/**
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* 写入缓存
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* @access public
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* @param string $name 缓存变量名
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* @param mixed $value 存储数据
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* @param int $expire 有效时间 0为永久
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* @return boolean
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*/
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public function set($name,$value,$expire=null) {
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N('cache_write',1);
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if(is_null($expire)) {
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$expire = $this->options['expire'];
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}
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$filename = $this->filename($name);
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$data = serialize($value);
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if( C('DATA_CACHE_COMPRESS') && function_exists('gzcompress')) {
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//数据压缩
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$data = gzcompress($data,3);
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}
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if(C('DATA_CACHE_CHECK')) {//开启数据校验
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$check = md5($data);
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}else {
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$check = '';
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}
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$data = "<?php\n//".sprintf('%012d',$expire).$check.$data."\n?>";
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$result = file_put_contents($filename,$data);
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if($result) {
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if($this->options['length']>0) {
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// 记录缓存队列
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$this->queue($name);
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}
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clearstatcache();
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return true;
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}else {
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return false;
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}
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}
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/**
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* 删除缓存
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* @access public
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* @param string $name 缓存变量名
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* @return boolean
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*/
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public function rm($name) {
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return unlink($this->filename($name));
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}
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/**
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* 清除缓存
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* @access public
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* @param string $name 缓存变量名
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* @return boolean
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*/
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public function clear() {
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$path = $this->options['temp'];
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$files = scandir($path);
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if($files){
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foreach($files as $file){
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if ($file != '.' && $file != '..' && is_dir($path.$file) ){
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array_map( 'unlink', glob( $path.$file.'/*.*' ) );
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}elseif(is_file($path.$file)){
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unlink( $path . $file );
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}
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}
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return true;
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}
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return false;
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}
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}
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