277 lines
9.4 KiB
PHP
277 lines
9.4 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Smarty Internal Plugin
|
||
|
|
*
|
||
|
|
* @package Smarty
|
||
|
|
* @subpackage Cacher
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Cache Handler API
|
||
|
|
*
|
||
|
|
* @package Smarty
|
||
|
|
* @subpackage Cacher
|
||
|
|
* @author Rodney Rehm
|
||
|
|
*/
|
||
|
|
abstract class Smarty_CacheResource_Custom extends Smarty_CacheResource
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* fetch cached content and its modification time from data source
|
||
|
|
*
|
||
|
|
* @param string $id unique cache content identifier
|
||
|
|
* @param string $name template name
|
||
|
|
* @param string $cache_id cache id
|
||
|
|
* @param string $compile_id compile id
|
||
|
|
* @param string $content cached content
|
||
|
|
* @param integer $mtime cache modification timestamp (epoch)
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
abstract protected function fetch($id, $name, $cache_id, $compile_id, &$content, &$mtime);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch cached content's modification timestamp from data source
|
||
|
|
* {@internal implementing this method is optional.
|
||
|
|
* Only implement it if modification times can be accessed faster than loading the complete cached content.}}
|
||
|
|
*
|
||
|
|
* @param string $id unique cache content identifier
|
||
|
|
* @param string $name template name
|
||
|
|
* @param string $cache_id cache id
|
||
|
|
* @param string $compile_id compile id
|
||
|
|
*
|
||
|
|
* @return integer|boolean timestamp (epoch) the template was modified, or false if not found
|
||
|
|
*/
|
||
|
|
protected function fetchTimestamp($id, $name, $cache_id, $compile_id)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Save content to cache
|
||
|
|
*
|
||
|
|
* @param string $id unique cache content identifier
|
||
|
|
* @param string $name template name
|
||
|
|
* @param string $cache_id cache id
|
||
|
|
* @param string $compile_id compile id
|
||
|
|
* @param integer|null $exp_time seconds till expiration or null
|
||
|
|
* @param string $content content to cache
|
||
|
|
*
|
||
|
|
* @return boolean success
|
||
|
|
*/
|
||
|
|
abstract protected function save($id, $name, $cache_id, $compile_id, $exp_time, $content);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Delete content from cache
|
||
|
|
*
|
||
|
|
* @param string|null $name template name
|
||
|
|
* @param string|null $cache_id cache id
|
||
|
|
* @param string|null $compile_id compile id
|
||
|
|
* @param integer|null $exp_time seconds till expiration time in seconds or null
|
||
|
|
*
|
||
|
|
* @return integer number of deleted caches
|
||
|
|
*/
|
||
|
|
abstract protected function delete($name, $cache_id, $compile_id, $exp_time);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* populate Cached Object with meta data from Resource
|
||
|
|
*
|
||
|
|
* @param Smarty_Template_Cached $cached cached object
|
||
|
|
* @param Smarty_Internal_Template $_template template object
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
public function populate(Smarty_Template_Cached $cached, Smarty_Internal_Template $_template)
|
||
|
|
{
|
||
|
|
$_cache_id = isset($cached->cache_id) ? preg_replace('![^\w\|]+!', '_', $cached->cache_id) : null;
|
||
|
|
$_compile_id = isset($cached->compile_id) ? preg_replace('![^\w]+!', '_', $cached->compile_id) : null;
|
||
|
|
$path = $cached->source->uid . $_cache_id . $_compile_id;
|
||
|
|
$cached->filepath = sha1($path);
|
||
|
|
if ($_template->smarty->cache_locking) {
|
||
|
|
$cached->lock_id = sha1('lock.' . $path);
|
||
|
|
}
|
||
|
|
$this->populateTimestamp($cached);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* populate Cached Object with timestamp and exists from Resource
|
||
|
|
*
|
||
|
|
* @param Smarty_Template_Cached $cached
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
public function populateTimestamp(Smarty_Template_Cached $cached)
|
||
|
|
{
|
||
|
|
$mtime =
|
||
|
|
$this->fetchTimestamp($cached->filepath, $cached->source->name, $cached->cache_id, $cached->compile_id);
|
||
|
|
if ($mtime !== null) {
|
||
|
|
$cached->timestamp = $mtime;
|
||
|
|
$cached->exists = !!$cached->timestamp;
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
$timestamp = null;
|
||
|
|
$this->fetch($cached->filepath, $cached->source->name, $cached->cache_id, $cached->compile_id, $cached->content,
|
||
|
|
$timestamp);
|
||
|
|
$cached->timestamp = isset($timestamp) ? $timestamp : false;
|
||
|
|
$cached->exists = !!$cached->timestamp;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Read the cached template and process the header
|
||
|
|
*
|
||
|
|
* @param \Smarty_Internal_Template $_smarty_tpl do not change variable name, is used by compiled template
|
||
|
|
* @param Smarty_Template_Cached $cached cached object
|
||
|
|
* @param boolean $update flag if called because cache update
|
||
|
|
*
|
||
|
|
* @return boolean true or false if the cached content does not exist
|
||
|
|
*/
|
||
|
|
public function process(Smarty_Internal_Template $_smarty_tpl, Smarty_Template_Cached $cached = null,
|
||
|
|
$update = false)
|
||
|
|
{
|
||
|
|
if (!$cached) {
|
||
|
|
$cached = $_smarty_tpl->cached;
|
||
|
|
}
|
||
|
|
$content = $cached->content ? $cached->content : null;
|
||
|
|
$timestamp = $cached->timestamp ? $cached->timestamp : null;
|
||
|
|
if ($content === null || !$timestamp) {
|
||
|
|
$this->fetch($_smarty_tpl->cached->filepath, $_smarty_tpl->source->name, $_smarty_tpl->cache_id,
|
||
|
|
$_smarty_tpl->compile_id, $content, $timestamp);
|
||
|
|
}
|
||
|
|
if (isset($content)) {
|
||
|
|
eval('?>' . $content);
|
||
|
|
$cached->content = null;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Write the rendered template output to cache
|
||
|
|
*
|
||
|
|
* @param Smarty_Internal_Template $_template template object
|
||
|
|
* @param string $content content to cache
|
||
|
|
*
|
||
|
|
* @return boolean success
|
||
|
|
*/
|
||
|
|
public function writeCachedContent(Smarty_Internal_Template $_template, $content)
|
||
|
|
{
|
||
|
|
return $this->save($_template->cached->filepath, $_template->source->name, $_template->cache_id,
|
||
|
|
$_template->compile_id, $_template->cache_lifetime, $content);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Read cached template from cache
|
||
|
|
*
|
||
|
|
* @param Smarty_Internal_Template $_template template object
|
||
|
|
*
|
||
|
|
* @return string|boolean content
|
||
|
|
*/
|
||
|
|
public function readCachedContent(Smarty_Internal_Template $_template)
|
||
|
|
{
|
||
|
|
$content = $_template->cached->content ? $_template->cached->content : null;
|
||
|
|
$timestamp = null;
|
||
|
|
if ($content === null) {
|
||
|
|
$timestamp = null;
|
||
|
|
$this->fetch($_template->cached->filepath, $_template->source->name, $_template->cache_id,
|
||
|
|
$_template->compile_id, $content, $timestamp);
|
||
|
|
}
|
||
|
|
if (isset($content)) {
|
||
|
|
return $content;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Empty cache
|
||
|
|
*
|
||
|
|
* @param Smarty $smarty Smarty object
|
||
|
|
* @param integer $exp_time expiration time (number of seconds, not timestamp)
|
||
|
|
*
|
||
|
|
* @return integer number of cache files deleted
|
||
|
|
*/
|
||
|
|
public function clearAll(Smarty $smarty, $exp_time = null)
|
||
|
|
{
|
||
|
|
return $this->delete(null, null, null, $exp_time);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Empty cache for a specific template
|
||
|
|
*
|
||
|
|
* @param Smarty $smarty Smarty object
|
||
|
|
* @param string $resource_name template name
|
||
|
|
* @param string $cache_id cache id
|
||
|
|
* @param string $compile_id compile id
|
||
|
|
* @param integer $exp_time expiration time (number of seconds, not timestamp)
|
||
|
|
*
|
||
|
|
* @return int number of cache files deleted
|
||
|
|
* @throws \SmartyException
|
||
|
|
*/
|
||
|
|
public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
|
||
|
|
{
|
||
|
|
$cache_name = null;
|
||
|
|
|
||
|
|
if (isset($resource_name)) {
|
||
|
|
$source = Smarty_Template_Source::load(null, $smarty, $resource_name);
|
||
|
|
if ($source->exists) {
|
||
|
|
$cache_name = $source->name;
|
||
|
|
} else {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->delete($cache_name, $cache_id, $compile_id, $exp_time);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check is cache is locked for this template
|
||
|
|
*
|
||
|
|
* @param Smarty $smarty Smarty object
|
||
|
|
* @param Smarty_Template_Cached $cached cached object
|
||
|
|
*
|
||
|
|
* @return boolean true or false if cache is locked
|
||
|
|
*/
|
||
|
|
public function hasLock(Smarty $smarty, Smarty_Template_Cached $cached)
|
||
|
|
{
|
||
|
|
$id = $cached->lock_id;
|
||
|
|
$name = $cached->source->name . '.lock';
|
||
|
|
|
||
|
|
$mtime = $this->fetchTimestamp($id, $name, $cached->cache_id, $cached->compile_id);
|
||
|
|
if ($mtime === null) {
|
||
|
|
$this->fetch($id, $name, $cached->cache_id, $cached->compile_id, $content, $mtime);
|
||
|
|
}
|
||
|
|
return $mtime && ($t = time()) - $mtime < $smarty->locking_timeout;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Lock cache for this template
|
||
|
|
*
|
||
|
|
* @param Smarty $smarty Smarty object
|
||
|
|
* @param Smarty_Template_Cached $cached cached object
|
||
|
|
*
|
||
|
|
* @return bool|void
|
||
|
|
*/
|
||
|
|
public function acquireLock(Smarty $smarty, Smarty_Template_Cached $cached)
|
||
|
|
{
|
||
|
|
$cached->is_locked = true;
|
||
|
|
$id = $cached->lock_id;
|
||
|
|
$name = $cached->source->name . '.lock';
|
||
|
|
$this->save($id, $name, $cached->cache_id, $cached->compile_id, $smarty->locking_timeout, '');
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Unlock cache for this template
|
||
|
|
*
|
||
|
|
* @param Smarty $smarty Smarty object
|
||
|
|
* @param Smarty_Template_Cached $cached cached object
|
||
|
|
*
|
||
|
|
* @return bool|void
|
||
|
|
*/
|
||
|
|
public function releaseLock(Smarty $smarty, Smarty_Template_Cached $cached)
|
||
|
|
{
|
||
|
|
$cached->is_locked = false;
|
||
|
|
$name = $cached->source->name . '.lock';
|
||
|
|
$this->delete($name, $cached->cache_id, $cached->compile_id, null);
|
||
|
|
}
|
||
|
|
}
|