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<?php |
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namespace PSFS\base; |
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use PSFS\base\config\Config; |
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use PSFS\base\exception\ConfigException; |
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use PSFS\base\exception\GeneratorException; |
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use PSFS\base\types\Api; |
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use PSFS\base\types\helpers\FileHelper; |
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use PSFS\base\types\helpers\GeneratorHelper; |
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use PSFS\base\types\helpers\Inspector; |
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use PSFS\base\types\traits\SingletonTrait; |
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/** |
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* Class Cache |
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* @package PSFS\base |
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* Gestión de los ficheros de cache |
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*/ |
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class Cache |
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{ |
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/** |
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* @var \Memcache |
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*/ |
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protected $memcache = null; |
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const JSON = 1; |
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const TEXT = 2; |
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const GZIP = 3; |
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const JSONGZ = 4; |
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const MEMCACHE = 5; |
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const CACHE_SESSION_VAR = '__CACHE__'; |
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use SingletonTrait; |
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public function __construct() |
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{ |
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$this->setLoaded(true); |
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} |
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/** |
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* @return bool |
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*/ |
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public static function canUseMemcache() |
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{ |
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return Config::getParam('psfs.memcache', false) && !Config::getParam('debug') && class_exists('Memcached'); |
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} |
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/** |
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* @param string $data |
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* @param string $path |
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* @throws GeneratorException |
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* @throws ConfigException |
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*/ |
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private function saveTextToFile($data, $path) |
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{ |
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GeneratorHelper::createDir(dirname($path)); |
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if (false === FileHelper::writeFile($path, $data)) { |
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throw new ConfigException(t('No se tienen los permisos suficientes para escribir en el fichero ') . $path); |
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} |
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} |
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/** |
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* @param string $path |
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* @param int $transform |
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* @param boolean $absolute |
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* @return mixed |
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*/ |
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public function getDataFromFile($path, $transform = Cache::TEXT, $absolute = false) |
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{ |
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Inspector::stats('[Cache] Gathering data from cache', Inspector::SCOPE_DEBUG); |
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$data = null; |
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$absolutePath = $absolute ? $path : CACHE_DIR . DIRECTORY_SEPARATOR . $path; |
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if (file_exists($absolutePath)) { |
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$data = FileHelper::readFile($absolutePath); |
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} |
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return self::extractDataWithFormat($data, $transform); |
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} |
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/** |
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* @param string $path |
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* @param int $expires |
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* @param boolean $absolute |
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* @return bool |
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*/ |
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private function hasExpiredCache($path, $expires = 300, $absolute = false) |
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{ |
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Inspector::stats('[Cache] Checking expiration', Inspector::SCOPE_DEBUG); |
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$absolutePath = ($absolute) ? $path : CACHE_DIR . DIRECTORY_SEPARATOR . $path; |
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$lasModificationDate = filemtime($absolutePath); |
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return ($lasModificationDate + $expires <= time()); |
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} |
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/** |
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* @param mixed $data |
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* @param int $transform |
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* @return mixed |
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*/ |
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public static function extractDataWithFormat($data = null, $transform = Cache::TEXT) |
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{ |
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Inspector::stats('[Cache] Extracting data from cache', Inspector::SCOPE_DEBUG); |
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switch ($transform) { |
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case self::JSON: |
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$data = json_decode($data ?: '', true); |
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break; |
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case self::JSONGZ: |
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$data = self::extractDataWithFormat($data, self::GZIP); |
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$data = self::extractDataWithFormat($data, self::JSON); |
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break; |
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case self::GZIP: |
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if (null !== $data && function_exists('gzuncompress')) { |
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$data = @gzuncompress($data ?: ''); |
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} |
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break; |
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} |
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return $data; |
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} |
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/** |
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* @param string $data |
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* @param int $transform |
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* @return string |
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*/ |
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public static function transformData($data, $transform = Cache::TEXT) |
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{ |
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Logger::log('Transform data in cache', LOG_DEBUG); |
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switch ($transform) { |
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case self::JSON: |
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$data = json_encode($data, JSON_PRETTY_PRINT); |
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break; |
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case self::JSONGZ: |
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$data = self::transformData($data, self::JSON); |
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$data = self::transformData($data, self::GZIP); |
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break; |
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case self::GZIP: |
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if (function_exists('gzcompress')) { |
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$data = gzcompress($data ?: ''); |
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} |
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break; |
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} |
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return $data; |
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} |
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/** |
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* @param string $path |
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* @param mixed $data |
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* @param int $transform |
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* @param bool $absolute |
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* @throws GeneratorException |
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* @throws ConfigException |
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*/ |
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public function storeData($path, $data, $transform = Cache::TEXT, $absolute = false) |
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{ |
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Inspector::stats('[Cache] Store data in cache', Inspector::SCOPE_DEBUG); |
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$data = self::transformData($data, $transform); |
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$absolutePath = $absolute ? $path : CACHE_DIR . DIRECTORY_SEPARATOR . $path; |
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$this->saveTextToFile($data, $absolutePath); |
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} |
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/** |
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* @param string $path |
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* @param int $expires |
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* @param callable $function |
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* @param int $transform |
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* @param bool $ignoreExpiration |
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* @return mixed|null |
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* @throws GeneratorException |
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* @throws ConfigException |
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*/ |
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public function readFromCache($path, $expires = 300, $function = null, $transform = Cache::TEXT, $ignoreExpiration = false) |
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{ |
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$data = null; |
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Inspector::stats('[Cache] Reading data from cache: ' . json_encode(['path' => $path]), Inspector::SCOPE_DEBUG); |
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if (file_exists(CACHE_DIR . DIRECTORY_SEPARATOR . $path)) { |
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if (is_callable($function) && $this->hasExpiredCache($path, $expires) && !$ignoreExpiration) { |
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$data = $function(); |
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$this->storeData($path, $data, $transform); |
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} else { |
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$data = $this->getDataFromFile($path, $transform); |
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} |
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} |
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return $data; |
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} |
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/** |
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* @return bool |
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*/ |
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private static function checkAdminSite() |
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{ |
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return Security::getInstance()->canAccessRestrictedAdmin(); |
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} |
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/** |
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* @return integer|boolean |
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*/ |
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public static function needCache() |
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{ |
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$needCache = false; |
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Logger::log('Checking cache requirements'); |
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if (!self::checkAdminSite() && !Config::getParam('debug') && Config::getParam('cache.data.enable', false)) { |
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$action = Security::getInstance()->getSessionKey(self::CACHE_SESSION_VAR); |
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Logger::log('Gathering cache params from Session', LOG_DEBUG, $action); |
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if (null !== $action && array_key_exists('cache', $action) && $action['cache'] > 0) { |
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$needCache = $action['cache']; |
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} |
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} |
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return $needCache; |
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} |
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/** |
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* @return array |
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*/ |
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public function getRequestCacheHash() |
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{ |
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$hashPath = null; |
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$filename = null; |
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$action = Security::getInstance()->getSessionKey(self::CACHE_SESSION_VAR); |
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Inspector::stats('[Cache] Gathering cache hash for request', Inspector::SCOPE_DEBUG); |
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if (null !== $action && $action['cache'] > 0) { |
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$query = $action['params']; |
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$query[Api::HEADER_API_LANG] = Request::header(Api::HEADER_API_LANG, 'es'); |
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$filename = FileHelper::generateHashFilename($action['http'], $action['slug'], $query); |
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$hashPath = FileHelper::generateCachePath($action, $query); |
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Inspector::stats('[Cache] Cache file calculated: ' . json_encode(['file' => $filename, 'hash' => $hashPath]), Inspector::SCOPE_DEBUG); |
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Logger::log('Cache file calculated', LOG_DEBUG, ['file' => $filename, 'hash' => $hashPath]); |
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} |
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return [$hashPath, $filename]; |
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} |
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public function flushCache() |
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{ |
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if (Config::getParam('cache.data.enable', false)) { |
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Inspector::stats('[Cache] Flushing cache', Inspector::SCOPE_DEBUG); |
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$action = Security::getInstance()->getSessionKey(self::CACHE_SESSION_VAR); |
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if (is_array($action)) { |
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$hashPath = FileHelper::generateCachePath($action, $action['params']) . '..' . DIRECTORY_SEPARATOR . ' .. ' . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR; |
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if (!file_exists($hashPath)) { |
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$hashPath = CACHE_DIR . DIRECTORY_SEPARATOR . $hashPath; |
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} |
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FileHelper::deleteDir($hashPath); |
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} |
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} |
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} |
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} |
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