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<?php
/**
* Bitrix Framework
* @package bitrix
* @subpackage main
* @copyright 2001-2014 Bitrix
*/
namespace Bitrix\Main\Data;
use Bitrix\Main;
use Bitrix\Main\Config;
use Bitrix\Main\Diag;
interface ICacheEngine
{
public function isAvailable();
public function clean($baseDir, $initDir = false, $filename = false);
public function read(&$allVars, $baseDir, $initDir, $filename, $TTL);
public function write($allVars, $baseDir, $initDir, $filename, $TTL);
public function isCacheExpired($path);
}
interface ICacheEngineStat
{
public function getReadBytes();
public function getWrittenBytes();
public function getCachePath();
}
class Cache
{
/**
* @var ICacheEngine | \ICacheBackend
*/
protected $cacheEngine;
protected $content;
protected $vars;
protected $TTL;
protected $uniqueString;
protected $baseDir;
protected $initDir;
protected $filename;
protected $isStarted = false;
protected static $showCacheStat = false;
protected static $clearCache = null;
protected static $clearCacheSession = null;
protected $forceRewriting = false;
public static function createCacheEngine($params = [])
{
static $cacheEngine = null;
if ($cacheEngine)
{
return clone $cacheEngine;
}
// Events can't be used here because events use cache
$cacheType = "files";
$v = Config\Configuration::getValue("cache");
if ($v != null && isset($v["type"]) && !empty($v["type"]))
{
$cacheType = $v["type"];
}
if (is_array($cacheType))
{
if (isset($cacheType["class_name"]))
{
if (!isset($cacheType["extension"]) || extension_loaded($cacheType["extension"]))
{
if (isset($cacheType["required_file"]) && ($requiredFile = Main\Loader::getLocal($cacheType["required_file"])) !== false)
{
require_once($requiredFile);
}
if (isset($cacheType["required_remote_file"]))
{
require_once($cacheType["required_remote_file"]);
}
$className = $cacheType["class_name"];
if (class_exists($className))
{
$cacheEngine = new $className($params);
}
}
}
}
else
{
if ($cacheType == 'memcache' && extension_loaded('memcache'))
{
$cacheEngine = new CacheEngineMemcache($params);
}
elseif ($cacheType == 'redis' && extension_loaded('redis'))
{
$cacheEngine = new CacheEngineRedis($params);
}
elseif ($cacheType == 'apc' && extension_loaded('apc'))
{
$cacheEngine = new CacheEngineApc();
}
elseif ($cacheType == 'xcache' && extension_loaded('xcache'))
{
$cacheEngine = new CacheEngineXCache($params);
}
elseif ($cacheType == 'files')
{
$cacheEngine = new CacheEngineFiles($params);
}
elseif ($cacheType == 'none')
{
$cacheEngine = new CacheEngineNone($params);
}
}
if ($cacheEngine == null)
{
$cacheEngine = new CacheEngineNone();
trigger_error("Cache engine is not found", E_USER_WARNING);
}
if (!$cacheEngine->isAvailable())
{
$cacheEngine = new CacheEngineNone();
trigger_error("Cache engine is not available", E_USER_WARNING);
}
return clone $cacheEngine;
}
public static function getCacheEngineType()
{
$obj = static::createCacheEngine();
$class = get_class($obj);
if (($pos = mb_strrpos($class, "\\")) !== false)
{
$class = mb_substr($class, $pos + 1);
}
return mb_strtolower($class);
}
/**
* @param array $params
* @return static Cache
*/
public static function createInstance($params = [])
{
$cacheEngine = static::createCacheEngine($params);
return new static($cacheEngine);
}
public function __construct($cacheEngine)
{
$this->cacheEngine = $cacheEngine;
}
public static function setShowCacheStat($showCacheStat)
{
static::$showCacheStat = $showCacheStat;
}
public static function getShowCacheStat()
{
return static::$showCacheStat;
}
/**
* A privileged user wants to skip cache on this hit.
* @param bool $clearCache
*/
public static function setClearCache($clearCache)
{
static::$clearCache = $clearCache;
}
/**
* A privileged user wants to skip cache on this session.
* @param bool $clearCacheSession
*/
public static function setClearCacheSession($clearCacheSession)
{
static::$clearCacheSession = $clearCacheSession;
}
public static function getSalt()
{
$context = Main\Application::getInstance()->getContext();
$server = $context->getServer();
$scriptName = $server->get("SCRIPT_NAME");
if ($scriptName == "/bitrix/urlrewrite.php" && (($v = $server->get("REAL_FILE_PATH")) != null))
{
$scriptName = $v;
}
elseif ($scriptName == "/404.php" && (($v = $server->get("REAL_FILE_PATH")) != null))
{
$scriptName = $v;
}
return "/".mb_substr(md5($scriptName), 0, 3);
}
/**
* Returns true if a privileged user wants to skip reading from cache (on this hit or session).
* @return bool
*/
public static function shouldClearCache()
{
global $USER;
$kernelSession = null;
$application = \Bitrix\Main\Application::getInstance();
if ($application->isExtendedKernelInitialized())
{
$kernelSession = $application->getKernelSession();
}
if (isset(static::$clearCacheSession) || isset(static::$clearCache))
{
if (is_object($USER) && $USER->CanDoOperation('cache_control'))
{
if (isset(static::$clearCacheSession))
{
if (static::$clearCacheSession === true)
{
$kernelSession["SESS_CLEAR_CACHE"] = "Y";
}
else
{
unset($kernelSession["SESS_CLEAR_CACHE"]);
}
}
if (isset(static::$clearCache) && (static::$clearCache === true))
{
return true;
}
}
}
if (isset($kernelSession["SESS_CLEAR_CACHE"]) && $kernelSession["SESS_CLEAR_CACHE"] === "Y")
{
return true;
}
return false;
}
public static function getPath($uniqueString)
{
$un = md5($uniqueString);
return mb_substr($un, 0, 2)."/".$un.".php";
}
public function clean($uniqueString, $initDir = false, $baseDir = "cache")
{
$personalRoot = Main\Application::getPersonalRoot();
$baseDir = $personalRoot."/".$baseDir."/";
$filename = $this->getPath($uniqueString);
if (static::$showCacheStat)
{
Diag\CacheTracker::add(0, "", $baseDir, $initDir, "/" . $filename, "C");
}
return $this->cacheEngine->clean($baseDir, $initDir, "/".$filename);
}
public function cleanDir($initDir = false, $baseDir = "cache")
{
$personalRoot = Main\Application::getPersonalRoot();
$baseDir = $personalRoot."/".$baseDir."/";
if (static::$showCacheStat)
{
Diag\CacheTracker::add(0, "", $baseDir, $initDir, "", "C");
}
return $this->cacheEngine->clean($baseDir, $initDir);
}
public function initCache($TTL, $uniqueString, $initDir = false, $baseDir = "cache")
{
if ($initDir === false)
{
$initDir = 'default';
}
$personalRoot = Main\Application::getPersonalRoot();
$this->baseDir = $personalRoot."/".$baseDir."/";
$this->initDir = $initDir;
$this->filename = "/".$this->getPath($uniqueString);
$this->TTL = $TTL;
$this->uniqueString = $uniqueString;
$this->vars = false;
if ($TTL <= 0 || $this->forceRewriting || static::shouldClearCache())
{
return false;
}
$data = ['CONTENT' => '', 'VARS' => ''];
if (!$this->cacheEngine->read($data, $this->baseDir, $this->initDir, $this->filename, $this->TTL))
{
return false;
}
if (!is_array($data) || empty($data) || !isset($data['CONTENT']) || !isset($data['VARS']))
{
return false;
}
if (static::$showCacheStat)
{
$read = 0;
$path = '';
if ($this->cacheEngine instanceof ICacheEngineStat)
{
$read = $this->cacheEngine->getReadBytes();
$path = $this->cacheEngine->getCachePath();
}
elseif ($this->cacheEngine instanceof \ICacheBackend)
{
$read = $this->cacheEngine->read;
$path = $this->cacheEngine->path;
}
Diag\CacheTracker::addCacheStatBytes($read);
Diag\CacheTracker::add($read, $path, $this->baseDir, $this->initDir, $this->filename, "R");
}
$this->content = $data['CONTENT'];
$this->vars = $data['VARS'];
return true;
}
public function output()
{
echo $this->content;
}
public function getVars()
{
return $this->vars;
}
public function startDataCache($TTL = false, $uniqueString = false, $initDir = false, $vars = array(), $baseDir = "cache")
{
$narg = func_num_args();
if ($narg <= 0)
{
$TTL = $this->TTL;
}
if ($narg <= 1)
{
$uniqueString = $this->uniqueString;
}
if ($narg <= 2)
{
$initDir = $this->initDir;
}
if ($narg <= 3)
{
$vars = $this->vars;
}
if ($this->initCache($TTL, $uniqueString, $initDir, $baseDir))
{
$this->output();
return false;
}
if ($TTL <= 0)
{
return true;
}
ob_start();
$this->vars = $vars;
$this->isStarted = true;
return true;
}
public function abortDataCache()
{
if (!$this->isStarted)
{
return;
}
$this->isStarted = false;
ob_end_flush();
}
public function endDataCache($vars=false)
{
if (!$this->isStarted)
{
return;
}
$this->isStarted = false;
$allVars = array(
"CONTENT" => ob_get_contents(),
"VARS" => ($vars!==false ? $vars : $this->vars),
);
$this->cacheEngine->write($allVars, $this->baseDir, $this->initDir, $this->filename, $this->TTL);
if (static::$showCacheStat)
{
$written = 0;
$path = '';
if ($this->cacheEngine instanceof ICacheEngineStat)
{
$written = $this->cacheEngine->getWrittenBytes();
$path = $this->cacheEngine->getCachePath();
}
elseif ($this->cacheEngine instanceof \ICacheBackend)
{
/** @noinspection PhpUndefinedFieldInspection */
$written = $this->cacheEngine->written;
/** @noinspection PhpUndefinedFieldInspection */
$path = $this->cacheEngine->path;
}
Diag\CacheTracker::addCacheStatBytes($written);
Diag\CacheTracker::add($written, $path, $this->baseDir, $this->initDir, $this->filename, "W");
}
if (ob_get_contents() <> '')
{
ob_end_flush();
}
else
{
ob_end_clean();
}
}
public function isCacheExpired($path)
{
return $this->cacheEngine->isCacheExpired($path);
}
public function isStarted()
{
return $this->isStarted;
}
public static function clearCache($full = false, $initDir = "")
{
if (($full !== true) && ($full !== false) && ($initDir === "") && is_string($full))
{
$initDir = $full;
$full = true;
}
$res = true;
if ($full === true)
{
$obCache = static::createInstance();
$obCache->cleanDir($initDir, "cache");
}
$path = Main\Loader::getPersonal("cache".$initDir);
if (is_dir($path) && ($handle = opendir($path)))
{
while (($file = readdir($handle)) !== false)
{
if ($file === "." || $file === "..")
{
continue;
}
if (is_dir($path."/".$file))
{
if (!static::clearCache($full, $initDir."/".$file))
{
$res = false;
}
else
{
@chmod($path."/".$file, BX_DIR_PERMISSIONS);
//We suppress error handle here because there may be valid cache files in this dir
@rmdir($path."/".$file);
}
}
elseif ($full)
{
@chmod($path."/".$file, BX_FILE_PERMISSIONS);
if (!unlink($path."/".$file))
{
$res = false;
}
}
elseif (mb_substr($file, -4) === ".php")
{
$c = static::createInstance();
if ($c->isCacheExpired($path."/".$file))
{
@chmod($path."/".$file, BX_FILE_PERMISSIONS);
if (!unlink($path."/".$file))
{
$res = false;
}
}
}
else
{
//We should skip unknown file
//it will be deleted with full cache cleanup
}
}
closedir($handle);
}
return $res;
}
/**
* Sets the forced mode to ignore TTL and rewrite the cache.
* @param bool $mode
*/
public function forceRewriting($mode)
{
$this->forceRewriting = (bool) $mode;
}
}