/ThinkPHP/Extend/Engine/Sae/Lib/Core/SaeMC.class.php

<?php



/**

 * +---------------------------------------------------

 * | 对Memcache操作的封装，用于文件缓存

 * +---------------------------------------------------

 * @author luofei614<www.3g4k.com>

 */

if (!class_exists('SaeMC')) {



//[sae]对Memcache操作的封装，编译缓存，模版缓存存入Memcache中（非wrappers的形式）

    class SaeMC {



        static public $handler;

        static private $current_include_file = null;

        static private $contents = array();

        static private $filemtimes = array();



        //设置文件内容

        static public function set($filename, $content) {

            if(SAE_RUNTIME){

                file_put_contents($filename, $content);

                return ;

            }

            $time=time();

            self::$handler->set($_SERVER['HTTP_APPVERSION'] . '/' . $filename, $time . $content, MEMCACHE_COMPRESSED, 0);

            self::$contents[$filename]=$content;

            self::$filemtimes[$filename]=$time;

        }



        //载入文件

        static public function include_file($_filename,$_vars=null) {

            if(!is_null($_vars))

                extract($_vars, EXTR_OVERWRITE);

            if(SAE_RUNTIME){

                include $_filename;

                return ;

            }

            self::$current_include_file = 'saemc://' . $_SERVER['HTTP_APPVERSION'] . '/' . $_filename;

            $_content = isset(self::$contents[$_filename]) ? self::$contents[$_filename] : self::getValue($_filename, 'content');

            if (!$_content)

                exit('<br /><b>SAE_Parse_error</b>: failed to open stream: No such file ' . self::$current_include_file);

            if (@(eval(' ?>' . $_content)) === false)

                self::error();

            self::$current_include_file = null;

            unset(self::$contents[$_filename]); //释放内存

        }



        static private function getValue($filename, $type='mtime') {

            $content = self::$handler->get($_SERVER['HTTP_APPVERSION'] . '/' . $filename);

            if (!$content)

                return false;

            $ret = array(

                'mtime' => substr($content, 0, 10),

                'content' => substr($content, 10)

            );

            self::$contents[$filename] = $ret['content'];

            self::$filemtimes[$filename] = $ret['mtime'];

            return $ret[$type];

        }



        //获得文件修改时间

        static public function filemtime($filename) {

            if(SAE_RUNTIME){

                return filemtime($filename);

            }

            if (!isset(self::$filemtimes[$filename]))

                return self::getValue($filename, 'mtime');

            return self::$filemtimes[$filename];

        }



        //删除文件

        static public function unlink($filename) {

            if(SAE_RUNTIME){

                unlink($filename);//在SAE上会参数报错，方便开发者找到错误

                return ;

            }

            if (isset(self::$contents[$filename]))

                unset(self::$contents[$filename]);

            if (isset(self::$filemtimes[$filename]))

                unset(self::$filemtimes[$filename]);

            return self::$handler->delete($_SERVER['HTTP_APPVERSION'] . '/' . $filename);

        }



        static public function file_exists($filename) {

            if(SAE_RUNTIME){

                return file_exists($filename);

            }

            return self::filemtime($filename) === false ? false : true;

        }



        static function error() {

            $error = error_get_last();

            if (!is_null($error) && strpos($error['file'], 'eval()') !== false) {

                if(!class_exists('Think')){

                    ob_end_clean();

                    if(C('OUTPUT_ENCODE')){

                        $zlib = ini_get('zlib.output_compression');

                        if(empty($zlib)) ob_start('ob_gzhandler');

                    }

                    if(C('SMS_ALERT_ON')) Sms::send('程序出现致命错误,请在SAE日志中心查看详情',$error['message'].'[file:'.self::$current_include_file.'][line:'.$error['line'].']',Sms::ERR);

                    exit("<br /><b>SAE_error</b>:  {$error['message']} in <b>" . self::$current_include_file . "</b> on line <b>{$error['line']}</b><br />");

                }else{

                    Think::appError($error['type'], $error['message'], self::$current_include_file, $error['line']);

              }

            }

        }



    }



    if(!SAE_RUNTIME) register_shutdown_function(array('SaeMC', 'error'));

    //[sae] 初始化memcache

    if(!SAE_RUNTIME){

    if (!(SaeMC::$handler = @(memcache_init()))) {

        header('Content-Type:text/html; charset=utf-8');

        exit('<div style=\'font-weight:bold;float:left;width:430px;text-align:center;border:1px solid silver;background:#E8EFFF;padding:8px;color:red;font-size:14px;font-family:Tahoma\'>您的Memcache还没有初始化，请登录SAE平台进行初始化~</div>');

    }

}



}