mirror of https://github.com/friendica/friendica
266 lines
10 KiB
PHP
266 lines
10 KiB
PHP
<?php
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/**
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* Smarty Internal Plugin CacheResource File
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*
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* @package Smarty
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* @subpackage Cacher
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* @author Uwe Tews
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* @author Rodney Rehm
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*/
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/**
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* This class does contain all necessary methods for the HTML cache on file system
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*
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* Implements the file system as resource for the HTML cache Version ussing nocache inserts.
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*
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* @package Smarty
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* @subpackage Cacher
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*/
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class Smarty_Internal_CacheResource_File extends Smarty_CacheResource {
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/**
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* populate Cached Object with meta data from Resource
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*
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* @param Smarty_Template_Cached $cached cached object
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* @param Smarty_Internal_Template $_template template object
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* @return void
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*/
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public function populate(Smarty_Template_Cached $cached, Smarty_Internal_Template $_template)
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{
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$_source_file_path = str_replace(':', '.', $_template->source->filepath);
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$_cache_id = isset($_template->cache_id) ? preg_replace('![^\w\|]+!', '_', $_template->cache_id) : null;
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$_compile_id = isset($_template->compile_id) ? preg_replace('![^\w\|]+!', '_', $_template->compile_id) : null;
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$_filepath = $_template->source->uid;
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// if use_sub_dirs, break file into directories
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if ($_template->smarty->use_sub_dirs) {
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$_filepath = substr($_filepath, 0, 2) . DS
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. substr($_filepath, 2, 2) . DS
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. substr($_filepath, 4, 2) . DS
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. $_filepath;
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}
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$_compile_dir_sep = $_template->smarty->use_sub_dirs ? DS : '^';
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if (isset($_cache_id)) {
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$_cache_id = str_replace('|', $_compile_dir_sep, $_cache_id) . $_compile_dir_sep;
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} else {
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$_cache_id = '';
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}
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if (isset($_compile_id)) {
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$_compile_id = $_compile_id . $_compile_dir_sep;
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} else {
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$_compile_id = '';
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}
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$_cache_dir = $_template->smarty->getCacheDir();
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if ($_template->smarty->cache_locking) {
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// create locking file name
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// relative file name?
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if (!preg_match('/^([\/\\\\]|[a-zA-Z]:[\/\\\\])/', $_cache_dir)) {
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$_lock_dir = rtrim(getcwd(), '/\\') . DS . $_cache_dir;
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} else {
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$_lock_dir = $_cache_dir;
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}
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$cached->lock_id = $_lock_dir.sha1($_cache_id.$_compile_id.$_template->source->uid).'.lock';
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}
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$cached->filepath = $_cache_dir . $_cache_id . $_compile_id . $_filepath . '.' . basename($_source_file_path) . '.php';
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$cached->timestamp = @filemtime($cached->filepath);
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$cached->exists = !!$cached->timestamp;
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}
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/**
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* populate Cached Object with timestamp and exists from Resource
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*
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* @param Smarty_Template_Cached $cached cached object
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* @return void
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*/
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public function populateTimestamp(Smarty_Template_Cached $cached)
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{
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$cached->timestamp = @filemtime($cached->filepath);
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$cached->exists = !!$cached->timestamp;
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}
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/**
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* Read the cached template and process its header
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*
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* @param Smarty_Internal_Template $_template template object
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* @param Smarty_Template_Cached $cached cached object
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* @return booelan true or false if the cached content does not exist
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*/
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public function process(Smarty_Internal_Template $_template, Smarty_Template_Cached $cached=null)
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{
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$_smarty_tpl = $_template;
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return @include $_template->cached->filepath;
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}
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/**
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* Write the rendered template output to cache
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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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* @return boolean success
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*/
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public function writeCachedContent(Smarty_Internal_Template $_template, $content)
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{
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if (Smarty_Internal_Write_File::writeFile($_template->cached->filepath, $content, $_template->smarty) === true) {
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$_template->cached->timestamp = @filemtime($_template->cached->filepath);
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$_template->cached->exists = !!$_template->cached->timestamp;
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if ($_template->cached->exists) {
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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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* Empty cache
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*
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* @param Smarty_Internal_Template $_template template object
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* @param integer $exp_time expiration time (number of seconds, not timestamp)
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* @return integer number of cache files deleted
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*/
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public function clearAll(Smarty $smarty, $exp_time = null)
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{
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return $this->clear($smarty, null, null, null, $exp_time);
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}
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/**
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* Empty cache for a specific template
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*
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* @param Smarty $_template template object
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* @param string $resource_name template name
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* @param string $cache_id cache id
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* @param string $compile_id compile id
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* @param integer $exp_time expiration time (number of seconds, not timestamp)
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* @return integer number of cache files deleted
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*/
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public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
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{
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$_cache_id = isset($cache_id) ? preg_replace('![^\w\|]+!', '_', $cache_id) : null;
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$_compile_id = isset($compile_id) ? preg_replace('![^\w\|]+!', '_', $compile_id) : null;
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$_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
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$_compile_id_offset = $smarty->use_sub_dirs ? 3 : 0;
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$_dir = $smarty->getCacheDir();
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$_dir_length = strlen($_dir);
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if (isset($_cache_id)) {
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$_cache_id_parts = explode('|', $_cache_id);
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$_cache_id_parts_count = count($_cache_id_parts);
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if ($smarty->use_sub_dirs) {
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foreach ($_cache_id_parts as $id_part) {
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$_dir .= $id_part . DS;
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}
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}
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}
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if (isset($resource_name)) {
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$_save_stat = $smarty->caching;
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$smarty->caching = true;
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$tpl = new $smarty->template_class($resource_name, $smarty);
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$smarty->caching = $_save_stat;
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// remove from template cache
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$tpl->source; // have the template registered before unset()
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if ($smarty->allow_ambiguous_resources) {
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$_templateId = $tpl->source->unique_resource . $tpl->cache_id . $tpl->compile_id;
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} else {
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$_templateId = $smarty->joined_template_dir . '#' . $resource_name . $tpl->cache_id . $tpl->compile_id;
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}
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if (isset($_templateId[150])) {
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$_templateId = sha1($_templateId);
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}
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unset($smarty->template_objects[$_templateId]);
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if ($tpl->source->exists) {
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$_resourcename_parts = basename(str_replace('^', '/', $tpl->cached->filepath));
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} else {
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return 0;
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}
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}
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$_count = 0;
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$_time = time();
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if (file_exists($_dir)) {
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$_cacheDirs = new RecursiveDirectoryIterator($_dir);
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$_cache = new RecursiveIteratorIterator($_cacheDirs, RecursiveIteratorIterator::CHILD_FIRST);
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foreach ($_cache as $_file) {
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if (substr($_file->getBasename(),0,1) == '.' || strpos($_file, '.svn') !== false) continue;
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// directory ?
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if ($_file->isDir()) {
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if (!$_cache->isDot()) {
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// delete folder if empty
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@rmdir($_file->getPathname());
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}
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} else {
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$_parts = explode($_dir_sep, str_replace('\\', '/', substr((string)$_file, $_dir_length)));
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$_parts_count = count($_parts);
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// check name
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if (isset($resource_name)) {
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if ($_parts[$_parts_count-1] != $_resourcename_parts) {
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continue;
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}
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}
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// check compile id
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if (isset($_compile_id) && (!isset($_parts[$_parts_count-2 - $_compile_id_offset]) || $_parts[$_parts_count-2 - $_compile_id_offset] != $_compile_id)) {
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continue;
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}
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// check cache id
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if (isset($_cache_id)) {
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// count of cache id parts
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$_parts_count = (isset($_compile_id)) ? $_parts_count - 2 - $_compile_id_offset : $_parts_count - 1 - $_compile_id_offset;
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if ($_parts_count < $_cache_id_parts_count) {
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continue;
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}
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for ($i = 0; $i < $_cache_id_parts_count; $i++) {
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if ($_parts[$i] != $_cache_id_parts[$i]) continue 2;
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}
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}
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// expired ?
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if (isset($exp_time) && $_time - @filemtime($_file) < $exp_time) {
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continue;
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}
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$_count += @unlink((string) $_file) ? 1 : 0;
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}
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}
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}
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return $_count;
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}
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/**
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* Check is cache is locked for this template
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*
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* @param Smarty $smarty Smarty object
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* @param Smarty_Template_Cached $cached cached object
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* @return booelan true or false if cache is locked
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*/
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public function hasLock(Smarty $smarty, Smarty_Template_Cached $cached)
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{
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if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
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clearstatcache(true, $cached->lock_id);
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} else {
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clearstatcache();
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}
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$t = @filemtime($cached->lock_id);
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return $t && (time() - $t < $smarty->locking_timeout);
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}
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/**
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* Lock cache for this template
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*
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* @param Smarty $smarty Smarty object
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* @param Smarty_Template_Cached $cached cached object
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*/
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public function acquireLock(Smarty $smarty, Smarty_Template_Cached $cached)
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{
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$cached->is_locked = true;
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touch($cached->lock_id);
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}
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/**
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* Unlock cache for this template
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*
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* @param Smarty $smarty Smarty object
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* @param Smarty_Template_Cached $cached cached object
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*/
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public function releaseLock(Smarty $smarty, Smarty_Template_Cached $cached)
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{
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$cached->is_locked = false;
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@unlink($cached->lock_id);
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}
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}
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?>
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