ReadHtmlCacheBehavior.class.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
defined('THINK_PATH') or exit();
/**
* 系统行为扩展：静态缓存读取
* @category Think
* @package Think
* @subpackage Behavior
* @author liu21st <liu21st@gmail.com>
*/
class ReadHtmlCacheBehavior extends Behavior {
protected $options = array(
'HTML_CACHE_ON' => false,
'HTML_CACHE_TIME' => 60,
'HTML_CACHE_RULES' => array(),
'HTML_FILE_SUFFIX' => '.html',
);
// 行为扩展的执行入口必须是run
public function run(&$params){
// 开启静态缓存
if(C('HTML_CACHE_ON')) {
$cacheTime = $this->requireHtmlCache();
if( false !== $cacheTime && $this->checkHTMLCache(HTML_FILE_NAME,$cacheTime)) { //静态页面有效
// 读取静态页面输出
readfile(HTML_FILE_NAME);
exit();
}
}
}
// 判断是否需要静态缓存
static private function requireHtmlCache() {
// 分析当前的静态规则
$htmls = C('HTML_CACHE_RULES'); // 读取静态规则
if(!empty($htmls)) {
$htmls = array_change_key_case($htmls);
// 静态规则文件定义格式 actionName=>array('静态规则','缓存时间','附加规则')
// 'read'=>array('{id},{name}',60,'md5') 必须保证静态规则的唯一性 和 可判断性
// 检测静态规则
$moduleName = strtolower(MODULE_NAME);
$actionName = strtolower(ACTION_NAME);
if(isset($htmls[$moduleName.':'.$actionName])) {
$html = $htmls[$moduleName.':'.$actionName]; // 某个模块的操作的静态规则
}elseif(isset($htmls[$moduleName.':'])){// 某个模块的静态规则
$html = $htmls[$moduleName.':'];
}elseif(isset($htmls[$actionName])){
$html = $htmls[$actionName]; // 所有操作的静态规则
}elseif(isset($htmls['*'])){
$html = $htmls['*']; // 全局静态规则
}elseif(isset($htmls['empty:index']) && !class_exists(MODULE_NAME.'Action')){
$html = $htmls['empty:index']; // 空模块静态规则
}elseif(isset($htmls[$moduleName.':_empty']) && self::isEmptyAction(MODULE_NAME,ACTION_NAME)){
$html = $htmls[$moduleName.':_empty']; // 空操作静态规则
}
if(!empty($html)) {
// 解读静态规则
$rule = $html[0];
// 以$_开头的系统变量
$rule = preg_replace('/{\$(_\w+)\.(\w+)\|(\w+)}/e',"\\3(\$\\1['\\2'])",$rule);
$rule = preg_replace('/{\$(_\w+)\.(\w+)}/e',"\$\\1['\\2']",$rule);
// {ID|FUN} GET变量的简写
$rule = preg_replace('/{(\w+)\|(\w+)}/e',"\\2(\$_GET['\\1'])",$rule);
$rule = preg_replace('/{(\w+)}/e',"\$_GET['\\1']",$rule);
// 特殊系统变量
$rule = str_ireplace(
array('{:app}','{:module}','{:action}','{:group}'),
array(APP_NAME,MODULE_NAME,ACTION_NAME,defined('GROUP_NAME')?GROUP_NAME:''),
$rule);
// {|FUN} 单独使用函数
$rule = preg_replace('/{|(\w+)}/e',"\\1()",$rule);
if(!empty($html[2])) $rule = $html[2]($rule); // 应用附加函数
$cacheTime = isset($html[1])?$html[1]:C('HTML_CACHE_TIME'); // 缓存有效期
// 当前缓存文件
define('HTML_FILE_NAME',HTML_PATH . $rule.C('HTML_FILE_SUFFIX'));
return $cacheTime;
}
}
// 无需缓存
return false;
}
/**
* 检查静态HTML文件是否有效
* 如果无效需要重新更新
* @access public
* @param string $cacheFile 静态文件名
* @param integer $cacheTime 缓存有效期
* @return boolean
*/
static public function checkHTMLCache($cacheFile='',$cacheTime='') {
if(!is_file($cacheFile)){
return false;
}elseif (filemtime(C('TEMPLATE_NAME')) > filemtime($cacheFile)) {
// 模板文件如果更新静态文件需要更新
return false;
}elseif(!is_numeric($cacheTime) && function_exists($cacheTime)){
return $cacheTime($cacheFile);
}elseif ($cacheTime != 0 && NOW_TIME > filemtime($cacheFile)+$cacheTime) {
// 文件是否在有效期
return false;
}
//静态文件有效
return true;
}
//检测是否是空操作
static private function isEmptyAction($module,$action) {
$className = $module.'Action';
$class = new $className;
return !method_exists($class,$action);
}
}