mirror of
https://github.com/smarty-php/smarty.git
synced 2025-11-02 21:31:48 +01:00
473 lines
16 KiB
PHP
473 lines
16 KiB
PHP
<?php
|
|
/**
|
|
* Smarty Internal Plugin
|
|
*
|
|
* @package Smarty
|
|
* @subpackage Cacher
|
|
*/
|
|
|
|
/**
|
|
* Smarty Cache Handler Base for Key/Value Storage Implementations
|
|
*
|
|
* This class implements the functionality required to use simple key/value stores
|
|
* for hierarchical cache groups. key/value stores like memcache or APC do not support
|
|
* wildcards in keys, therefore a cache group cannot be cleared like "a|*" - which
|
|
* is no problem to filesystem and RDBMS implementations.
|
|
*
|
|
* This implementation is based on the concept of invalidation. While one specific cache
|
|
* can be identified and cleared, any range of caches cannot be identified. For this reason
|
|
* each level of the cache group hierarchy can have its own value in the store. These values
|
|
* are nothing but microtimes, telling us when a particular cache group was cleared for the
|
|
* last time. These keys are evaluated for every cache read to determine if the cache has
|
|
* been invalidated since it was created and should hence be treated as inexistent.
|
|
*
|
|
* Although deep hierarchies are possible, they are not recommended. Try to keep your
|
|
* cache groups as shallow as possible. Anything up 3-5 parents should be ok. So
|
|
* »a|b|c« is a good depth where »a|b|c|d|e|f|g|h|i|j|k« isn't. Try to join correlating
|
|
* cache groups: if your cache groups look somewhat like »a|b|$page|$items|$whatever«
|
|
* consider using »a|b|c|$page-$items-$whatever« instead.
|
|
*
|
|
* @package Smarty
|
|
* @subpackage Cacher
|
|
* @author Rodney Rehm
|
|
*/
|
|
abstract class Smarty_CacheResource_KeyValueStore extends Smarty_CacheResource
|
|
{
|
|
/**
|
|
* cache for contents
|
|
* @var array
|
|
*/
|
|
protected $contents = array();
|
|
/**
|
|
* cache for timestamps
|
|
* @var array
|
|
*/
|
|
protected $timestamps = array();
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
$cached->filepath = $_template->source->uid
|
|
. '#' . $this->sanitize($cached->source->name)
|
|
. '#' . $this->sanitize($cached->cache_id)
|
|
. '#' . $this->sanitize($cached->compile_id);
|
|
|
|
$this->populateTimestamp($cached);
|
|
}
|
|
|
|
/**
|
|
* populate Cached Object with timestamp and exists from Resource
|
|
*
|
|
* @param Smarty_Template_Cached $cached cached object
|
|
* @return void
|
|
*/
|
|
public function populateTimestamp(Smarty_Template_Cached $cached)
|
|
{
|
|
if (!$this->fetch($cached->filepath, $cached->source->name, $cached->cache_id, $cached->compile_id, $content, $timestamp, $cached->source->uid)) {
|
|
return;
|
|
}
|
|
$cached->content = $content;
|
|
$cached->timestamp = (int) $timestamp;
|
|
$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 booelan 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 || !$timestamp) {
|
|
if (!$this->fetch($_template->cached->filepath, $_template->source->name, $_template->cache_id, $_template->compile_id, $content, $timestamp, $_template->source->uid)) {
|
|
return false;
|
|
}
|
|
}
|
|
if (isset($content)) {
|
|
$_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)
|
|
{
|
|
$this->addMetaTimestamp($content);
|
|
|
|
return $this->write(array($_template->cached->filepath => $content), $_template->properties['cache_lifetime']);
|
|
}
|
|
|
|
/**
|
|
* Empty cache
|
|
*
|
|
* {@internal the $exp_time argument is ignored altogether }}
|
|
*
|
|
* @param Smarty $smarty Smarty object
|
|
* @param integer $exp_time expiration time [being ignored]
|
|
* @return integer number of cache files deleted [always -1]
|
|
* @uses purge() to clear the whole store
|
|
* @uses invalidate() to mark everything outdated if purge() is inapplicable
|
|
*/
|
|
public function clearAll(Smarty $smarty, $exp_time=null)
|
|
{
|
|
if (!$this->purge()) {
|
|
$this->invalidate(null);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Empty cache for a specific template
|
|
*
|
|
* {@internal the $exp_time argument is ignored altogether}}
|
|
*
|
|
* @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 [being ignored]
|
|
* @return integer number of cache files deleted [always -1]
|
|
* @uses buildCachedFilepath() to generate the CacheID
|
|
* @uses invalidate() to mark CacheIDs parent chain as outdated
|
|
* @uses delete() to remove CacheID from cache
|
|
*/
|
|
public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
|
|
{
|
|
$uid = $this->getTemplateUid($smarty, $resource_name, $cache_id, $compile_id);
|
|
$cid = $uid . '#' . $this->sanitize($resource_name) . '#' . $this->sanitize($cache_id) . '#' . $this->sanitize($compile_id);
|
|
$this->delete(array($cid));
|
|
$this->invalidate($cid, $resource_name, $cache_id, $compile_id, $uid);
|
|
|
|
return -1;
|
|
}
|
|
/**
|
|
* Get template's unique ID
|
|
*
|
|
* @param Smarty $smarty Smarty object
|
|
* @param string $resource_name template name
|
|
* @param string $cache_id cache id
|
|
* @param string $compile_id compile id
|
|
* @return string filepath of cache file
|
|
*/
|
|
protected function getTemplateUid(Smarty $smarty, $resource_name, $cache_id, $compile_id)
|
|
{
|
|
$uid = '';
|
|
if (isset($resource_name)) {
|
|
$tpl = new $smarty->template_class($resource_name, $smarty);
|
|
if ($tpl->source->exists) {
|
|
$uid = $tpl->source->uid;
|
|
}
|
|
|
|
// remove from template cache
|
|
if ($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]);
|
|
}
|
|
|
|
return $uid;
|
|
}
|
|
|
|
/**
|
|
* Sanitize CacheID components
|
|
*
|
|
* @param string $string CacheID component to sanitize
|
|
* @return string sanitized CacheID component
|
|
*/
|
|
protected function sanitize($string)
|
|
{
|
|
// some poeple smoke bad weed
|
|
$string = trim($string, '|');
|
|
if (!$string) {
|
|
return null;
|
|
}
|
|
|
|
return preg_replace('#[^\w\|]+#S', '_', $string);
|
|
}
|
|
|
|
/**
|
|
* Fetch and prepare a cache object.
|
|
*
|
|
* @param string $cid CacheID to fetch
|
|
* @param string $resource_name template name
|
|
* @param string $cache_id cache id
|
|
* @param string $compile_id compile id
|
|
* @param string $content cached content
|
|
* @param integer &$timestamp cached timestamp (epoch)
|
|
* @param string $resource_uid resource's uid
|
|
* @return boolean success
|
|
*/
|
|
protected function fetch($cid, $resource_name = null, $cache_id = null, $compile_id = null, &$content = null, &$timestamp = null, $resource_uid = null)
|
|
{
|
|
$t = $this->read(array($cid));
|
|
$content = !empty($t[$cid]) ? $t[$cid] : null;
|
|
$timestamp = null;
|
|
|
|
if ($content && ($timestamp = $this->getMetaTimestamp($content))) {
|
|
$invalidated = $this->getLatestInvalidationTimestamp($cid, $resource_name, $cache_id, $compile_id, $resource_uid);
|
|
if ($invalidated > $timestamp) {
|
|
$timestamp = null;
|
|
$content = null;
|
|
}
|
|
}
|
|
|
|
return !!$content;
|
|
}
|
|
|
|
/**
|
|
* Add current microtime to the beginning of $cache_content
|
|
*
|
|
* {@internal the header uses 8 Bytes, the first 4 Bytes are the seconds, the second 4 Bytes are the microseconds}}
|
|
*
|
|
* @param string &$content the content to be cached
|
|
*/
|
|
protected function addMetaTimestamp(&$content)
|
|
{
|
|
$mt = explode(" ", microtime());
|
|
$ts = pack("NN", $mt[1], (int) ($mt[0] * 100000000));
|
|
$content = $ts . $content;
|
|
}
|
|
|
|
/**
|
|
* Extract the timestamp the $content was cached
|
|
*
|
|
* @param string &$content the cached content
|
|
* @return float the microtime the content was cached
|
|
*/
|
|
protected function getMetaTimestamp(&$content)
|
|
{
|
|
$s = unpack("N", substr($content, 0, 4));
|
|
$m = unpack("N", substr($content, 4, 4));
|
|
$content = substr($content, 8);
|
|
|
|
return $s[1] + ($m[1] / 100000000);
|
|
}
|
|
|
|
/**
|
|
* Invalidate CacheID
|
|
*
|
|
* @param string $cid CacheID
|
|
* @param string $resource_name template name
|
|
* @param string $cache_id cache id
|
|
* @param string $compile_id compile id
|
|
* @param string $resource_uid source's uid
|
|
* @return void
|
|
*/
|
|
protected function invalidate($cid = null, $resource_name = null, $cache_id = null, $compile_id = null, $resource_uid = null)
|
|
{
|
|
$now = microtime(true);
|
|
$key = null;
|
|
// invalidate everything
|
|
if (!$resource_name && !$cache_id && !$compile_id) {
|
|
$key = 'IVK#ALL';
|
|
}
|
|
// invalidate all caches by template
|
|
else if ($resource_name && !$cache_id && !$compile_id) {
|
|
$key = 'IVK#TEMPLATE#' . $resource_uid . '#' . $this->sanitize($resource_name);
|
|
}
|
|
// invalidate all caches by cache group
|
|
else if (!$resource_name && $cache_id && !$compile_id) {
|
|
$key = 'IVK#CACHE#' . $this->sanitize($cache_id);
|
|
}
|
|
// invalidate all caches by compile id
|
|
else if (!$resource_name && !$cache_id && $compile_id) {
|
|
$key = 'IVK#COMPILE#' . $this->sanitize($compile_id);
|
|
}
|
|
// invalidate by combination
|
|
else {
|
|
$key = 'IVK#CID#' . $cid;
|
|
}
|
|
$this->write(array($key => $now));
|
|
}
|
|
|
|
/**
|
|
* Determine the latest timestamp known to the invalidation chain
|
|
*
|
|
* @param string $cid CacheID to determine latest invalidation timestamp of
|
|
* @param string $resource_name template name
|
|
* @param string $cache_id cache id
|
|
* @param string $compile_id compile id
|
|
* @param string $resource_uid source's filepath
|
|
* @return float the microtime the CacheID was invalidated
|
|
*/
|
|
protected function getLatestInvalidationTimestamp($cid, $resource_name = null, $cache_id = null, $compile_id = null, $resource_uid = null)
|
|
{
|
|
// abort if there is no CacheID
|
|
if (false && !$cid) {
|
|
return 0;
|
|
}
|
|
// abort if there are no InvalidationKeys to check
|
|
if (!($_cid = $this->listInvalidationKeys($cid, $resource_name, $cache_id, $compile_id, $resource_uid))) {
|
|
return 0;
|
|
}
|
|
|
|
// there are no InValidationKeys
|
|
if (!($values = $this->read($_cid))) {
|
|
return 0;
|
|
}
|
|
// make sure we're dealing with floats
|
|
$values = array_map('floatval', $values);
|
|
|
|
return max($values);
|
|
}
|
|
|
|
/**
|
|
* Translate a CacheID into the list of applicable InvalidationKeys.
|
|
*
|
|
* Splits "some|chain|into|an|array" into array( '#clearAll#', 'some', 'some|chain', 'some|chain|into', ... )
|
|
*
|
|
* @param string $cid CacheID to translate
|
|
* @param string $resource_name template name
|
|
* @param string $cache_id cache id
|
|
* @param string $compile_id compile id
|
|
* @param string $resource_uid source's filepath
|
|
* @return array list of InvalidationKeys
|
|
* @uses $invalidationKeyPrefix to prepend to each InvalidationKey
|
|
*/
|
|
protected function listInvalidationKeys($cid, $resource_name = null, $cache_id = null, $compile_id = null, $resource_uid = null)
|
|
{
|
|
$t = array('IVK#ALL');
|
|
$_name = $_compile = '#';
|
|
if ($resource_name) {
|
|
$_name .= $resource_uid . '#' . $this->sanitize($resource_name);
|
|
$t[] = 'IVK#TEMPLATE' . $_name;
|
|
}
|
|
if ($compile_id) {
|
|
$_compile .= $this->sanitize($compile_id);
|
|
$t[] = 'IVK#COMPILE' . $_compile;
|
|
}
|
|
$_name .= '#';
|
|
// some poeple smoke bad weed
|
|
$cid = trim($cache_id, '|');
|
|
if (!$cid) {
|
|
return $t;
|
|
}
|
|
$i = 0;
|
|
while (true) {
|
|
// determine next delimiter position
|
|
$i = strpos($cid, '|', $i);
|
|
// add complete CacheID if there are no more delimiters
|
|
if ($i === false) {
|
|
$t[] = 'IVK#CACHE#' . $cid;
|
|
$t[] = 'IVK#CID' . $_name . $cid . $_compile;
|
|
$t[] = 'IVK#CID' . $_name . $_compile;
|
|
break;
|
|
}
|
|
$part = substr($cid, 0, $i);
|
|
// add slice to list
|
|
$t[] = 'IVK#CACHE#' . $part;
|
|
$t[] = 'IVK#CID' . $_name . $part . $_compile;
|
|
// skip past delimiter position
|
|
$i++;
|
|
}
|
|
|
|
return $t;
|
|
}
|
|
|
|
/**
|
|
* Check is cache is locked for this template
|
|
*
|
|
* @param Smarty $smarty Smarty object
|
|
* @param Smarty_Template_Cached $cached cached object
|
|
* @return booelan true or false if cache is locked
|
|
*/
|
|
public function hasLock(Smarty $smarty, Smarty_Template_Cached $cached)
|
|
{
|
|
$key = 'LOCK#' . $cached->filepath;
|
|
$data = $this->read(array($key));
|
|
|
|
return $data && time() - $data[$key] < $smarty->locking_timeout;
|
|
}
|
|
|
|
/**
|
|
* Lock cache for this template
|
|
*
|
|
* @param Smarty $smarty Smarty object
|
|
* @param Smarty_Template_Cached $cached cached object
|
|
*/
|
|
public function acquireLock(Smarty $smarty, Smarty_Template_Cached $cached)
|
|
{
|
|
$cached->is_locked = true;
|
|
$key = 'LOCK#' . $cached->filepath;
|
|
$this->write(array($key => time()), $smarty->locking_timeout);
|
|
}
|
|
|
|
/**
|
|
* Unlock cache for this template
|
|
*
|
|
* @param Smarty $smarty Smarty object
|
|
* @param Smarty_Template_Cached $cached cached object
|
|
*/
|
|
public function releaseLock(Smarty $smarty, Smarty_Template_Cached $cached)
|
|
{
|
|
$cached->is_locked = false;
|
|
$key = 'LOCK#' . $cached->filepath;
|
|
$this->delete(array($key));
|
|
}
|
|
|
|
/**
|
|
* Read values for a set of keys from cache
|
|
*
|
|
* @param array $keys list of keys to fetch
|
|
* @return array list of values with the given keys used as indexes
|
|
*/
|
|
abstract protected function read(array $keys);
|
|
|
|
/**
|
|
* Save values for a set of keys to cache
|
|
*
|
|
* @param array $keys list of values to save
|
|
* @param int $expire expiration time
|
|
* @return boolean true on success, false on failure
|
|
*/
|
|
abstract protected function write(array $keys, $expire=null);
|
|
|
|
/**
|
|
* Remove values from cache
|
|
*
|
|
* @param array $keys list of keys to delete
|
|
* @return boolean true on success, false on failure
|
|
*/
|
|
abstract protected function delete(array $keys);
|
|
|
|
/**
|
|
* Remove *all* values from cache
|
|
*
|
|
* @return boolean true on success, false on failure
|
|
*/
|
|
protected function purge()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
}
|