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https://github.com/smarty-php/smarty.git
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358 lines
11 KiB
PHP
358 lines
11 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: Uwe Tews
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* Date: 04.12.2014
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* Time: 06:08
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*/
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/**
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* Smarty Resource Data Object
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* Cache Data Container for Template Files
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*
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* @package Smarty
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* @subpackage TemplateResources
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* @author Rodney Rehm
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*/
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class Smarty_Template_Cached
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{
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/**
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* Source Filepath
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*
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* @var string
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*/
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public $filepath = false;
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/**
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* Source Content
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*
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* @var string
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*/
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public $content = null;
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/**
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* Source Timestamp
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*
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* @var integer
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*/
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public $timestamp = false;
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/**
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* Source Existence
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*
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* @var boolean
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*/
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public $exists = false;
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/**
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* Cache Is Valid
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*
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* @var boolean
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*/
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public $valid = false;
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/**
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* Cache was processed
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*
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* @var boolean
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*/
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public $processed = false;
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/**
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* CacheResource Handler
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*
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* @var Smarty_CacheResource
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*/
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public $handler = null;
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/**
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* Template Compile Id (Smarty_Internal_Template::$compile_id)
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*
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* @var string
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*/
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public $compile_id = null;
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/**
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* Template Cache Id (Smarty_Internal_Template::$cache_id)
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*
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* @var string
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*/
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public $cache_id = null;
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/**
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* Id for cache locking
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*
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* @var string
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*/
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public $lock_id = null;
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/**
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* flag that cache is locked by this instance
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*
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* @var bool
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*/
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public $is_locked = false;
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/**
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* Source Object
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*
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* @var Smarty_Template_Source
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*/
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public $source = null;
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/**
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* create Cached Object container
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*
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* @param Smarty_Internal_Template $_template template object
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*/
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public function __construct(Smarty_Internal_Template $_template)
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{
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$this->compile_id = $_template->compile_id;
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$this->cache_id = $_template->cache_id;
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$this->source = $_template->source;
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$this->handler = Smarty_CacheResource::load($_template->smarty);
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}
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/**
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* @param Smarty_Internal_Template $_template
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*
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* @return Smarty_Template_Cached
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*/
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static function load(Smarty_Internal_Template $_template)
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{
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$_template->cached = $cached = new Smarty_Template_Cached($_template);
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//
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// check if cache is valid
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//
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if (!($_template->caching == Smarty::CACHING_LIFETIME_CURRENT || $_template->caching == Smarty::CACHING_LIFETIME_SAVED) || $_template->source->recompiled) {
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$cached->handler->populate($cached, $_template);
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return $cached;
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}
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while (true) {
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while (true) {
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$cached->handler->populate($cached, $_template);
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if ($cached->timestamp === false || $_template->smarty->force_compile || $_template->smarty->force_cache) {
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$cached->valid = false;
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} else {
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$cached->valid = true;
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}
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if ($cached->valid && $_template->caching == Smarty::CACHING_LIFETIME_CURRENT && $_template->cache_lifetime >= 0 && time() > ($cached->timestamp + $_template->cache_lifetime)) {
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// lifetime expired
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$cached->valid = false;
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}
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if ($cached->valid || !$_template->smarty->cache_locking) {
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break;
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}
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if (!$cached->handler->locked($_template->smarty, $cached)) {
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$cached->handler->acquireLock($_template->smarty, $cached);
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break 2;
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}
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}
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if ($cached->valid) {
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if (!$_template->smarty->cache_locking || $cached->handler->locked($_template->smarty, $cached) === null) {
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// load cache file for the following checks
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if ($_template->smarty->debugging) {
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Smarty_Internal_Debug::start_cache($_template);
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}
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$cached->process($_template);
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if ($_template->smarty->debugging) {
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Smarty_Internal_Debug::end_cache($_template);
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}
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} else {
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continue;
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}
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} else {
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return $cached;
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}
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if ($cached->valid && $_template->caching === Smarty::CACHING_LIFETIME_SAVED && $_template->properties['cache_lifetime'] >= 0 && (time() > ($_template->cached->timestamp + $_template->properties['cache_lifetime']))) {
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$cached->valid = false;
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}
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if (!$cached->valid && $_template->smarty->cache_locking) {
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$cached->handler->acquireLock($_template->smarty, $cached);
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return $cached;
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} else {
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return $cached;
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}
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}
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}
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/**
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* Process cached template
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*
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* @param Smarty_Internal_Template $_template template object
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*/
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public function process(Smarty_Internal_Template $_template)
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{
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if ($this->handler->process($_template, $this) === false) {
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$this->valid = false;
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}
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if ($this->valid) {
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$this->processed = true;
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} else {
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$this->processed = false;
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}
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}
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/**
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* Render cached template
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*
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* @param Smarty_Internal_Template $_template
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*
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* @return string
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* @throws Exception
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*/
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public function render(Smarty_Internal_Template $_template)
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{
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if (!$this->processed) {
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$this->process($_template);
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}
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return $_template->getRenderedTemplateCode();
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}
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/**
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* Write this cache object to handler
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*
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* @param Smarty_Internal_Template $_template template object
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* @param string $content content to cache
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*
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* @return boolean success
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*/
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public function write(Smarty_Internal_Template $_template, $content)
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{
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if (!$_template->source->recompiled) {
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if ($this->handler->writeCachedContent($_template, $content)) {
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$this->content = null;
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$this->timestamp = time();
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$this->exists = true;
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$this->valid = true;
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if ($_template->smarty->cache_locking) {
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$this->handler->releaseLock($_template->smarty, $this);
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}
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return true;
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}
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}
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return false;
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}
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/**
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* Read cache content from handler
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*
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* @param Smarty_Internal_Template $_template template object
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*
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* @return string content
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*/
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public function read(Smarty_Internal_Template $_template)
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{
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if (!$_template->source->recompiled) {
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return $this->handler->readCachedContent($_template);
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}
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return false;
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}
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/**
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* Sanitize content and write it to cache resource
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*
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* @param Smarty_Internal_Template $_template
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* @param string $content
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* @param bool $no_output_filter
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*
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* @throws SmartyException
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*/
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public function updateCache(Smarty_Internal_Template $_template, $content, $no_output_filter)
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{
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$_template->properties['has_nocache_code'] = false;
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// get text between non-cached items
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$cache_split = preg_split("!/\*%%SmartyNocache:{$_template->properties['nocache_hash']}%%\*\/(.+?)/\*/%%SmartyNocache:{$_template->properties['nocache_hash']}%%\*/!s", $content);
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// get non-cached items
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preg_match_all("!/\*%%SmartyNocache:{$_template->properties['nocache_hash']}%%\*\/(.+?)/\*/%%SmartyNocache:{$_template->properties['nocache_hash']}%%\*/!s", $content, $cache_parts);
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$output = '';
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// loop over items, stitch back together
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foreach ($cache_split as $curr_idx => $curr_split) {
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// escape PHP tags in template content
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$output .= preg_replace('/(<%|%>|<\?php|<\?|\?>|<script\s+language\s*=\s*[\"\']?\s*php\s*[\"\']?\s*>)/', "<?php echo '\$1'; ?>\n", $curr_split);
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if (isset($cache_parts[0][$curr_idx])) {
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$_template->properties['has_nocache_code'] = true;
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$output .= $cache_parts[1][$curr_idx];
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}
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}
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if (!$no_output_filter && !$_template->has_nocache_code && (isset($_template->smarty->autoload_filters['output']) || isset($_template->smarty->registered_filters['output']))) {
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$output = Smarty_Internal_Filter_Handler::runFilter('output', $output, $_template);
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}
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// write cache file content
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$this->writeCachedContent($_template, $output);
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}
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/**
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* Writes the content to cache resource
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*
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* @param Smarty_Internal_Template $_template
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* @param string $content
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*
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* @return bool
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*/
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public function writeCachedContent(Smarty_Internal_Template $_template, $content)
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{
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if ($_template->source->recompiled || !($_template->caching == Smarty::CACHING_LIFETIME_CURRENT || $_template->caching == Smarty::CACHING_LIFETIME_SAVED)) {
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// don't write cache file
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return false;
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}
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$_template->properties['cache_lifetime'] = $_template->cache_lifetime;
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$_template->properties['unifunc'] = 'content_' . str_replace(array('.', ','), '_', uniqid('', true));
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$content = Smarty_Internal_Extension_CodeFrame::create($_template, $content, true);
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return $this->write($_template, $content);
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}
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/**
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* check client side cache
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*
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* @param Smarty_Internal_Template $_template
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* @param string $content
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*/
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public function cacheModifiedCheck(Smarty_Internal_Template $_template, $content)
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{
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$_isCached = $_template->isCached() && !$_template->has_nocache_code;
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$_last_modified_date = @substr($_SERVER['HTTP_IF_MODIFIED_SINCE'], 0, strpos($_SERVER['HTTP_IF_MODIFIED_SINCE'], 'GMT') + 3);
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if ($_isCached && $this->timestamp <= strtotime($_last_modified_date)) {
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switch (PHP_SAPI) {
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case 'cgi': // php-cgi < 5.3
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case 'cgi-fcgi': // php-cgi >= 5.3
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case 'fpm-fcgi': // php-fpm >= 5.3.3
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header('Status: 304 Not Modified');
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break;
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case 'cli':
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if ( /* ^phpunit */
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!empty($_SERVER['SMARTY_PHPUNIT_DISABLE_HEADERS']) /* phpunit$ */
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) {
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$_SERVER['SMARTY_PHPUNIT_HEADERS'][] = '304 Not Modified';
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}
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break;
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default:
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header($_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified');
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break;
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}
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} else {
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switch (PHP_SAPI) {
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case 'cli':
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if ( /* ^phpunit */
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!empty($_SERVER['SMARTY_PHPUNIT_DISABLE_HEADERS']) /* phpunit$ */
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) {
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$_SERVER['SMARTY_PHPUNIT_HEADERS'][] = 'Last-Modified: ' . gmdate('D, d M Y H:i:s', $this->timestamp) . ' GMT';
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}
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break;
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default:
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header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $this->timestamp) . ' GMT');
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break;
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}
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echo $content;
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}
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}
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}
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