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smarty/libs/sysplugins/smarty_template_cached.php
Uwe Tews a9f0b8ad1f - optimize compile check handling
2015-07-01 03:27:06 +02:00

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