285 lines
9.3 KiB
PHP
285 lines
9.3 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 null;
|
|
}
|
|
|
|
/**
|
|
* 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 $name template name
|
|
* @param string $cache_id cache id
|
|
* @param string $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;
|
|
|
|
$cached->filepath = sha1($cached->source->filepath . $_cache_id . $_compile_id);
|
|
$this->populateTimestamp($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 $_template template object
|
|
* @param Smarty_Template_Cached $cached cached object
|
|
*
|
|
* @return boolean true or false if the cached content does not exist
|
|
*/
|
|
public function process(Smarty_Internal_Template $_template, Smarty_Template_Cached $cached = null)
|
|
{
|
|
if (!$cached) {
|
|
$cached = $_template->cached;
|
|
}
|
|
$content = $cached->content ? $cached->content : null;
|
|
$timestamp = $cached->timestamp ? $cached->timestamp : null;
|
|
if ($content === null || !$timestamp) {
|
|
$this->fetch(
|
|
$_template->cached->filepath,
|
|
$_template->source->name,
|
|
$_template->cache_id,
|
|
$_template->compile_id,
|
|
$content,
|
|
$timestamp
|
|
);
|
|
}
|
|
if (isset($content)) {
|
|
/** @var Smarty_Internal_Template $_smarty_tpl
|
|
* used in evaluated code
|
|
*/
|
|
$_smarty_tpl = $_template;
|
|
eval("?>" . $content);
|
|
|
|
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->properties['cache_lifetime'],
|
|
$content
|
|
);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
$this->cache = array();
|
|
|
|
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 integer number of cache files deleted
|
|
*/
|
|
public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
|
|
{
|
|
$this->cache = array();
|
|
$cache_name = null;
|
|
|
|
if (isset($resource_name)) {
|
|
$_save_stat = $smarty->caching;
|
|
$smarty->caching = true;
|
|
$tpl = new $smarty->template_class($resource_name, $smarty);
|
|
$smarty->caching = $_save_stat;
|
|
|
|
if ($tpl->source->exists) {
|
|
$cache_name = $tpl->source->name;
|
|
} else {
|
|
return 0;
|
|
}
|
|
// remove from template cache
|
|
if ($smarty->allow_ambiguous_resources) {
|
|
$_templateId = $tpl->source->unique_resource . $tpl->cache_id . $tpl->compile_id;
|
|
} else {
|
|
$_templateId = $smarty->joined_template_dir . '#' . $resource_name . $tpl->cache_id . $tpl->compile_id;
|
|
}
|
|
if (isset($_templateId[150])) {
|
|
$_templateId = sha1($_templateId);
|
|
}
|
|
unset($smarty->template_objects[$_templateId]);
|
|
// template object no longer needed
|
|
unset($tpl);
|
|
}
|
|
|
|
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->filepath;
|
|
$name = $cached->source->name . '.lock';
|
|
|
|
$mtime = $this->fetchTimestamp($id, $name, null, null);
|
|
if ($mtime === null) {
|
|
$this->fetch($id, $name, null, null, $content, $mtime);
|
|
}
|
|
|
|
return $mtime && 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->filepath;
|
|
$name = $cached->source->name . '.lock';
|
|
$this->save($id, $name, null, null, $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, null, null, null);
|
|
}
|
|
}
|