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