1004 lines
33 KiB
PHP
1004 lines
33 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Cache
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* @subpackage Zend_Cache_Backend
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/**
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* @see Zend_Cache_Backend_Interface
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*/
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require_once 'Zend/Cache/Backend/ExtendedInterface.php';
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/**
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* @see Zend_Cache_Backend
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*/
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require_once 'Zend/Cache/Backend.php';
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/**
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* @package Zend_Cache
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* @subpackage Zend_Cache_Backend
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Cache_Backend_File extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
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{
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/**
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* Available options
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*
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* =====> (string) cache_dir :
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* - Directory where to put the cache files
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*
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* =====> (boolean) file_locking :
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* - Enable / disable file_locking
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* - Can avoid cache corruption under bad circumstances but it doesn't work on multithread
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* webservers and on NFS filesystems for example
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*
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* =====> (boolean) read_control :
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* - Enable / disable read control
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* - If enabled, a control key is embeded in cache file and this key is compared with the one
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* calculated after the reading.
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*
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* =====> (string) read_control_type :
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* - Type of read control (only if read control is enabled). Available values are :
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* 'md5' for a md5 hash control (best but slowest)
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* 'crc32' for a crc32 hash control (lightly less safe but faster, better choice)
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* 'adler32' for an adler32 hash control (excellent choice too, faster than crc32)
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* 'strlen' for a length only test (fastest)
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*
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* =====> (int) hashed_directory_level :
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* - Hashed directory level
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* - Set the hashed directory structure level. 0 means "no hashed directory
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* structure", 1 means "one level of directory", 2 means "two levels"...
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* This option can speed up the cache only when you have many thousands of
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* cache file. Only specific benchs can help you to choose the perfect value
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* for you. Maybe, 1 or 2 is a good start.
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*
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* =====> (int) hashed_directory_umask :
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* - Umask for hashed directory structure
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*
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* =====> (string) file_name_prefix :
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* - prefix for cache files
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* - be really carefull with this option because a too generic value in a system cache dir
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* (like /tmp) can cause disasters when cleaning the cache
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*
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* =====> (int) cache_file_umask :
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* - Umask for cache files
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*
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* =====> (int) metatadatas_array_max_size :
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* - max size for the metadatas array (don't change this value unless you
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* know what you are doing)
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*
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* @var array available options
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*/
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protected $_options = array(
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'cache_dir' => null,
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'file_locking' => true,
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'read_control' => true,
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'read_control_type' => 'crc32',
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'hashed_directory_level' => 0,
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'hashed_directory_umask' => 0700,
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'file_name_prefix' => 'zend_cache',
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'cache_file_umask' => 0600,
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'metadatas_array_max_size' => 100
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);
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/**
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* Array of metadatas (each item is an associative array)
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*
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* @var array
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*/
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private $_metadatasArray = array();
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/**
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* Constructor
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*
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* @param array $options associative array of options
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* @throws Zend_Cache_Exception
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* @return void
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*/
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public function __construct(array $options = array())
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{
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parent::__construct($options);
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if ($this->_options['cache_dir'] !== null) { // particular case for this option
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$this->setCacheDir($this->_options['cache_dir']);
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} else {
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$this->setCacheDir(self::getTmpDir() . DIRECTORY_SEPARATOR, false);
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}
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if (isset($this->_options['file_name_prefix'])) { // particular case for this option
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if (!preg_match('~^[\w]+$~', $this->_options['file_name_prefix'])) {
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Zend_Cache::throwException('Invalid file_name_prefix : must use only [a-zA-A0-9_]');
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}
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}
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if ($this->_options['metadatas_array_max_size'] < 10) {
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Zend_Cache::throwException('Invalid metadatas_array_max_size, must be > 10');
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}
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if (isset($options['hashed_directory_umask']) && is_string($options['hashed_directory_umask'])) {
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// See #ZF-4422
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$this->_options['hashed_directory_umask'] = octdec($this->_options['hashed_directory_umask']);
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}
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if (isset($options['cache_file_umask']) && is_string($options['cache_file_umask'])) {
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// See #ZF-4422
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$this->_options['cache_file_umask'] = octdec($this->_options['cache_file_umask']);
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}
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}
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/**
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* Set the cache_dir (particular case of setOption() method)
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*
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* @param string $value
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* @param boolean $trailingSeparator If true, add a trailing separator is necessary
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* @throws Zend_Cache_Exception
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* @return void
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*/
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public function setCacheDir($value, $trailingSeparator = true)
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{
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if (!is_dir($value)) {
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Zend_Cache::throwException('cache_dir must be a directory');
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}
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if (!is_writable($value)) {
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Zend_Cache::throwException('cache_dir is not writable');
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}
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if ($trailingSeparator) {
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// add a trailing DIRECTORY_SEPARATOR if necessary
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$value = rtrim(realpath($value), '\\/') . DIRECTORY_SEPARATOR;
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}
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$this->_options['cache_dir'] = $value;
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}
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/**
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* Test if a cache is available for the given id and (if yes) return it (false else)
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*
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* @param string $id cache id
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* @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
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* @return string|false cached datas
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*/
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public function load($id, $doNotTestCacheValidity = false)
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{
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if (!($this->_test($id, $doNotTestCacheValidity))) {
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// The cache is not hit !
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return false;
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}
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$metadatas = $this->_getMetadatas($id);
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$file = $this->_file($id);
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$data = $this->_fileGetContents($file);
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if ($this->_options['read_control']) {
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$hashData = $this->_hash($data, $this->_options['read_control_type']);
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$hashControl = $metadatas['hash'];
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if ($hashData != $hashControl) {
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// Problem detected by the read control !
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$this->_log('Zend_Cache_Backend_File::load() / read_control : stored hash and computed hash do not match');
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$this->remove($id);
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return false;
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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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* Test if a cache is available or not (for the given id)
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*
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* @param string $id cache id
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* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
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*/
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public function test($id)
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{
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clearstatcache();
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return $this->_test($id, false);
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}
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/**
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* Save some string datas into a cache record
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*
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* Note : $data is always "string" (serialization is done by the
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* core not by the backend)
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*
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* @param string $data Datas to cache
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* @param string $id Cache id
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* @param array $tags Array of strings, the cache record will be tagged by each string entry
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* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
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* @return boolean true if no problem
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*/
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public function save($data, $id, $tags = array(), $specificLifetime = false)
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{
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clearstatcache();
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$file = $this->_file($id);
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$path = $this->_path($id);
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if ($this->_options['hashed_directory_level'] > 0) {
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if (!is_writable($path)) {
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// maybe, we just have to build the directory structure
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$this->_recursiveMkdirAndChmod($id);
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}
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if (!is_writable($path)) {
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return false;
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}
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}
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if ($this->_options['read_control']) {
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$hash = $this->_hash($data, $this->_options['read_control_type']);
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} else {
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$hash = '';
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}
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$metadatas = array(
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'hash' => $hash,
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'mtime' => time(),
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'expire' => $this->_expireTime($this->getLifetime($specificLifetime)),
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'tags' => $tags
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);
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$res = $this->_setMetadatas($id, $metadatas);
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if (!$res) {
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$this->_log('Zend_Cache_Backend_File::save() / error on saving metadata');
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return false;
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}
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$res = $this->_filePutContents($file, $data);
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return $res;
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}
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/**
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* Remove a cache record
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*
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* @param string $id cache id
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* @return boolean true if no problem
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*/
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public function remove($id)
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{
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$file = $this->_file($id);
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return ($this->_delMetadatas($id) && $this->_remove($file));
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}
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/**
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* Clean some cache records
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*
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* Available modes are :
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* 'all' (default) => remove all cache entries ($tags is not used)
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* 'old' => remove too old cache entries ($tags is not used)
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* 'matchingTag' => remove cache entries matching all given tags
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* ($tags can be an array of strings or a single string)
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* 'notMatchingTag' => remove cache entries not matching one of the given tags
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* ($tags can be an array of strings or a single string)
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* 'matchingAnyTag' => remove cache entries matching any given tags
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* ($tags can be an array of strings or a single string)
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*
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* @param string $mode clean mode
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* @param tags array $tags array of tags
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* @return boolean true if no problem
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*/
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public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
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{
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// We use this private method to hide the recursive stuff
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clearstatcache();
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return $this->_clean($this->_options['cache_dir'], $mode, $tags);
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}
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/**
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* Return an array of stored cache ids
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*
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* @return array array of stored cache ids (string)
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*/
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public function getIds()
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{
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return $this->_get($this->_options['cache_dir'], 'ids', array());
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}
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/**
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* Return an array of stored tags
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*
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* @return array array of stored tags (string)
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*/
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public function getTags()
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{
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return $this->_get($this->_options['cache_dir'], 'tags', array());
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}
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/**
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* Return an array of stored cache ids which match given tags
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*
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* In case of multiple tags, a logical AND is made between tags
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*
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* @param array $tags array of tags
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* @return array array of matching cache ids (string)
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*/
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public function getIdsMatchingTags($tags = array())
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{
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return $this->_get($this->_options['cache_dir'], 'matching', $tags);
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}
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/**
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* Return an array of stored cache ids which don't match given tags
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*
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* In case of multiple tags, a logical OR is made between tags
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*
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* @param array $tags array of tags
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* @return array array of not matching cache ids (string)
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*/
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public function getIdsNotMatchingTags($tags = array())
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{
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return $this->_get($this->_options['cache_dir'], 'notMatching', $tags);
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}
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/**
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* Return an array of stored cache ids which match any given tags
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*
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* In case of multiple tags, a logical AND is made between tags
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*
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* @param array $tags array of tags
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* @return array array of any matching cache ids (string)
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*/
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public function getIdsMatchingAnyTags($tags = array())
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{
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return $this->_get($this->_options['cache_dir'], 'matchingAny', $tags);
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}
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/**
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* Return the filling percentage of the backend storage
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*
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* @throws Zend_Cache_Exception
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* @return int integer between 0 and 100
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*/
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public function getFillingPercentage()
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{
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$free = disk_free_space($this->_options['cache_dir']);
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$total = disk_total_space($this->_options['cache_dir']);
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if ($total == 0) {
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Zend_Cache::throwException('can\'t get disk_total_space');
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} else {
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if ($free >= $total) {
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return 100;
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}
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return ((int) (100. * ($total - $free) / $total));
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}
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}
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/**
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* Return an array of metadatas for the given cache id
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*
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* The array must include these keys :
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* - expire : the expire timestamp
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* - tags : a string array of tags
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* - mtime : timestamp of last modification time
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*
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* @param string $id cache id
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* @return array array of metadatas (false if the cache id is not found)
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*/
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public function getMetadatas($id)
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{
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$metadatas = $this->_getMetadatas($id);
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if (!$metadatas) {
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return false;
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}
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if (time() > $metadatas['expire']) {
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return false;
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}
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return array(
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'expire' => $metadatas['expire'],
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'tags' => $metadatas['tags'],
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'mtime' => $metadatas['mtime']
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);
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}
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/**
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* Give (if possible) an extra lifetime to the given cache id
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*
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* @param string $id cache id
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* @param int $extraLifetime
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* @return boolean true if ok
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*/
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public function touch($id, $extraLifetime)
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{
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$metadatas = $this->_getMetadatas($id);
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if (!$metadatas) {
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return false;
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}
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if (time() > $metadatas['expire']) {
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return false;
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}
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$newMetadatas = array(
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'hash' => $metadatas['hash'],
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'mtime' => time(),
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'expire' => $metadatas['expire'] + $extraLifetime,
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'tags' => $metadatas['tags']
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);
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$res = $this->_setMetadatas($id, $newMetadatas);
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if (!$res) {
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return false;
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}
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return true;
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}
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/**
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* Return an associative array of capabilities (booleans) of the backend
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*
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* The array must include these keys :
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* - automatic_cleaning (is automating cleaning necessary)
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* - tags (are tags supported)
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* - expired_read (is it possible to read expired cache records
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* (for doNotTestCacheValidity option for example))
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* - priority does the backend deal with priority when saving
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* - infinite_lifetime (is infinite lifetime can work with this backend)
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* - get_list (is it possible to get the list of cache ids and the complete list of tags)
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*
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* @return array associative of with capabilities
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*/
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public function getCapabilities()
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{
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return array(
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'automatic_cleaning' => true,
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'tags' => true,
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'expired_read' => true,
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'priority' => false,
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'infinite_lifetime' => true,
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'get_list' => true
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);
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}
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/**
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* PUBLIC METHOD FOR UNIT TESTING ONLY !
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*
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* Force a cache record to expire
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*
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* @param string $id cache id
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*/
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public function ___expire($id)
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{
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$metadatas = $this->_getMetadatas($id);
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if ($metadatas) {
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$metadatas['expire'] = 1;
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$this->_setMetadatas($id, $metadatas);
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}
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}
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/**
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* Get a metadatas record
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*
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* @param string $id Cache id
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* @return array|false Associative array of metadatas
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*/
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private function _getMetadatas($id)
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{
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if (isset($this->_metadatasArray[$id])) {
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return $this->_metadatasArray[$id];
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} else {
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$metadatas = $this->_loadMetadatas($id);
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if (!$metadatas) {
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return false;
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}
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$this->_setMetadatas($id, $metadatas, false);
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return $metadatas;
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}
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}
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/**
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* Set a metadatas record
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*
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* @param string $id Cache id
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* @param array $metadatas Associative array of metadatas
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* @param boolean $save optional pass false to disable saving to file
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* @return boolean True if no problem
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*/
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private function _setMetadatas($id, $metadatas, $save = true)
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{
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if (count($this->_metadatasArray) >= $this->_options['metadatas_array_max_size']) {
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$n = (int) ($this->_options['metadatas_array_max_size'] / 10);
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$this->_metadatasArray = array_slice($this->_metadatasArray, $n);
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}
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if ($save) {
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$result = $this->_saveMetadatas($id, $metadatas);
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if (!$result) {
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return false;
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}
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}
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$this->_metadatasArray[$id] = $metadatas;
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return true;
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}
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/**
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* Drop a metadata record
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*
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* @param string $id Cache id
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* @return boolean True if no problem
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*/
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private function _delMetadatas($id)
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{
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if (isset($this->_metadatasArray[$id])) {
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unset($this->_metadatasArray[$id]);
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}
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$file = $this->_metadatasFile($id);
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return $this->_remove($file);
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}
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|
|
/**
|
|
* Clear the metadatas array
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _cleanMetadatas()
|
|
{
|
|
$this->_metadatasArray = array();
|
|
}
|
|
|
|
/**
|
|
* Load metadatas from disk
|
|
*
|
|
* @param string $id Cache id
|
|
* @return array|false Metadatas associative array
|
|
*/
|
|
private function _loadMetadatas($id)
|
|
{
|
|
$file = $this->_metadatasFile($id);
|
|
$result = $this->_fileGetContents($file);
|
|
if (!$result) {
|
|
return false;
|
|
}
|
|
$tmp = @unserialize($result);
|
|
return $tmp;
|
|
}
|
|
|
|
/**
|
|
* Save metadatas to disk
|
|
*
|
|
* @param string $id Cache id
|
|
* @param array $metadatas Associative array
|
|
* @return boolean True if no problem
|
|
*/
|
|
private function _saveMetadatas($id, $metadatas)
|
|
{
|
|
$file = $this->_metadatasFile($id);
|
|
$result = $this->_filePutContents($file, serialize($metadatas));
|
|
if (!$result) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Make and return a file name (with path) for metadatas
|
|
*
|
|
* @param string $id Cache id
|
|
* @return string Metadatas file name (with path)
|
|
*/
|
|
private function _metadatasFile($id)
|
|
{
|
|
$path = $this->_path($id);
|
|
$fileName = $this->_idToFileName('internal-metadatas---' . $id);
|
|
return $path . $fileName;
|
|
}
|
|
|
|
/**
|
|
* Check if the given filename is a metadatas one
|
|
*
|
|
* @param string $fileName File name
|
|
* @return boolean True if it's a metadatas one
|
|
*/
|
|
private function _isMetadatasFile($fileName)
|
|
{
|
|
$id = $this->_fileNameToId($fileName);
|
|
if (substr($id, 0, 21) == 'internal-metadatas---') {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove a file
|
|
*
|
|
* If we can't remove the file (because of locks or any problem), we will touch
|
|
* the file to invalidate it
|
|
*
|
|
* @param string $file Complete file path
|
|
* @return boolean True if ok
|
|
*/
|
|
private function _remove($file)
|
|
{
|
|
if (!is_file($file)) {
|
|
return false;
|
|
}
|
|
if (!@unlink($file)) {
|
|
# we can't remove the file (because of locks or any problem)
|
|
$this->_log("Zend_Cache_Backend_File::_remove() : we can't remove $file");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Clean some cache records (private method used for recursive stuff)
|
|
*
|
|
* Available modes are :
|
|
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
|
|
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
|
|
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
|
|
* ($tags can be an array of strings or a single string)
|
|
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags}
|
|
* ($tags can be an array of strings or a single string)
|
|
* Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags
|
|
* ($tags can be an array of strings or a single string)
|
|
*
|
|
* @param string $dir Directory to clean
|
|
* @param string $mode Clean mode
|
|
* @param array $tags Array of tags
|
|
* @throws Zend_Cache_Exception
|
|
* @return boolean True if no problem
|
|
*/
|
|
private function _clean($dir, $mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
|
|
{
|
|
if (!is_dir($dir)) {
|
|
return false;
|
|
}
|
|
$result = true;
|
|
$prefix = $this->_options['file_name_prefix'];
|
|
$glob = @glob($dir . $prefix . '--*');
|
|
if ($glob === false) {
|
|
return true;
|
|
}
|
|
foreach ($glob as $file) {
|
|
if (is_file($file)) {
|
|
$fileName = basename($file);
|
|
if ($this->_isMetadatasFile($fileName)) {
|
|
// in CLEANING_MODE_ALL, we drop anything, even remainings old metadatas files
|
|
if ($mode != Zend_Cache::CLEANING_MODE_ALL) {
|
|
continue;
|
|
}
|
|
}
|
|
$id = $this->_fileNameToId($fileName);
|
|
$metadatas = $this->_getMetadatas($id);
|
|
if ($metadatas === FALSE) {
|
|
$metadatas = array('expire' => 1, 'tags' => array());
|
|
}
|
|
switch ($mode) {
|
|
case Zend_Cache::CLEANING_MODE_ALL:
|
|
$res = $this->remove($id);
|
|
if (!$res) {
|
|
// in this case only, we accept a problem with the metadatas file drop
|
|
$res = $this->_remove($file);
|
|
}
|
|
$result = $result && $res;
|
|
break;
|
|
case Zend_Cache::CLEANING_MODE_OLD:
|
|
if (time() > $metadatas['expire']) {
|
|
$result = ($result) && ($this->remove($id));
|
|
}
|
|
break;
|
|
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
|
|
$matching = true;
|
|
foreach ($tags as $tag) {
|
|
if (!in_array($tag, $metadatas['tags'])) {
|
|
$matching = false;
|
|
break;
|
|
}
|
|
}
|
|
if ($matching) {
|
|
$result = ($result) && ($this->remove($id));
|
|
}
|
|
break;
|
|
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
|
|
$matching = false;
|
|
foreach ($tags as $tag) {
|
|
if (in_array($tag, $metadatas['tags'])) {
|
|
$matching = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!$matching) {
|
|
$result = ($result) && $this->remove($id);
|
|
}
|
|
break;
|
|
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
|
|
$matching = false;
|
|
foreach ($tags as $tag) {
|
|
if (in_array($tag, $metadatas['tags'])) {
|
|
$matching = true;
|
|
break;
|
|
}
|
|
}
|
|
if ($matching) {
|
|
$result = ($result) && ($this->remove($id));
|
|
}
|
|
break;
|
|
default:
|
|
Zend_Cache::throwException('Invalid mode for clean() method');
|
|
break;
|
|
}
|
|
}
|
|
if ((is_dir($file)) and ($this->_options['hashed_directory_level']>0)) {
|
|
// Recursive call
|
|
$result = ($result) && ($this->_clean($file . DIRECTORY_SEPARATOR, $mode, $tags));
|
|
if ($mode=='all') {
|
|
// if mode=='all', we try to drop the structure too
|
|
@rmdir($file);
|
|
}
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
private function _get($dir, $mode, $tags = array())
|
|
{
|
|
if (!is_dir($dir)) {
|
|
return false;
|
|
}
|
|
$result = array();
|
|
$prefix = $this->_options['file_name_prefix'];
|
|
$glob = @glob($dir . $prefix . '--*');
|
|
if ($glob === false) {
|
|
return true;
|
|
}
|
|
foreach ($glob as $file) {
|
|
if (is_file($file)) {
|
|
$fileName = basename($file);
|
|
$id = $this->_fileNameToId($fileName);
|
|
$metadatas = $this->_getMetadatas($id);
|
|
if ($metadatas === FALSE) {
|
|
continue;
|
|
}
|
|
if (time() > $metadatas['expire']) {
|
|
continue;
|
|
}
|
|
switch ($mode) {
|
|
case 'ids':
|
|
$result[] = $id;
|
|
break;
|
|
case 'tags':
|
|
$result = array_unique(array_merge($result, $metadatas['tags']));
|
|
break;
|
|
case 'matching':
|
|
$matching = true;
|
|
foreach ($tags as $tag) {
|
|
if (!in_array($tag, $metadatas['tags'])) {
|
|
$matching = false;
|
|
break;
|
|
}
|
|
}
|
|
if ($matching) {
|
|
$result[] = $id;
|
|
}
|
|
break;
|
|
case 'notMatching':
|
|
$matching = false;
|
|
foreach ($tags as $tag) {
|
|
if (in_array($tag, $metadatas['tags'])) {
|
|
$matching = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!$matching) {
|
|
$result[] = $id;
|
|
}
|
|
break;
|
|
case 'matchingAny':
|
|
$matching = false;
|
|
foreach ($tags as $tag) {
|
|
if (in_array($tag, $metadatas['tags'])) {
|
|
$matching = true;
|
|
break;
|
|
}
|
|
}
|
|
if ($matching) {
|
|
$result[] = $id;
|
|
}
|
|
break;
|
|
default:
|
|
Zend_Cache::throwException('Invalid mode for _get() method');
|
|
break;
|
|
}
|
|
}
|
|
if ((is_dir($file)) and ($this->_options['hashed_directory_level']>0)) {
|
|
// Recursive call
|
|
$result = array_unique(array_merge($result, $this->_get($file . DIRECTORY_SEPARATOR, $mode, $tags)));
|
|
}
|
|
}
|
|
return array_unique($result);
|
|
}
|
|
|
|
/**
|
|
* Compute & return the expire time
|
|
*
|
|
* @return int expire time (unix timestamp)
|
|
*/
|
|
private function _expireTime($lifetime)
|
|
{
|
|
if ($lifetime === null) {
|
|
return 9999999999;
|
|
}
|
|
return time() + $lifetime;
|
|
}
|
|
|
|
/**
|
|
* Make a control key with the string containing datas
|
|
*
|
|
* @param string $data Data
|
|
* @param string $controlType Type of control 'md5', 'crc32' or 'strlen'
|
|
* @throws Zend_Cache_Exception
|
|
* @return string Control key
|
|
*/
|
|
private function _hash($data, $controlType)
|
|
{
|
|
switch ($controlType) {
|
|
case 'md5':
|
|
return md5($data);
|
|
case 'crc32':
|
|
return crc32($data);
|
|
case 'strlen':
|
|
return strlen($data);
|
|
case 'adler32':
|
|
return hash('adler32', $data);
|
|
default:
|
|
Zend_Cache::throwException("Incorrect hash function : $controlType");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Transform a cache id into a file name and return it
|
|
*
|
|
* @param string $id Cache id
|
|
* @return string File name
|
|
*/
|
|
private function _idToFileName($id)
|
|
{
|
|
$prefix = $this->_options['file_name_prefix'];
|
|
$result = $prefix . '---' . $id;
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Make and return a file name (with path)
|
|
*
|
|
* @param string $id Cache id
|
|
* @return string File name (with path)
|
|
*/
|
|
private function _file($id)
|
|
{
|
|
$path = $this->_path($id);
|
|
$fileName = $this->_idToFileName($id);
|
|
return $path . $fileName;
|
|
}
|
|
|
|
/**
|
|
* Return the complete directory path of a filename (including hashedDirectoryStructure)
|
|
*
|
|
* @param string $id Cache id
|
|
* @param boolean $parts if true, returns array of directory parts instead of single string
|
|
* @return string Complete directory path
|
|
*/
|
|
private function _path($id, $parts = false)
|
|
{
|
|
$partsArray = array();
|
|
$root = $this->_options['cache_dir'];
|
|
$prefix = $this->_options['file_name_prefix'];
|
|
if ($this->_options['hashed_directory_level']>0) {
|
|
$hash = hash('adler32', $id);
|
|
for ($i=0 ; $i < $this->_options['hashed_directory_level'] ; $i++) {
|
|
$root = $root . $prefix . '--' . substr($hash, 0, $i + 1) . DIRECTORY_SEPARATOR;
|
|
$partsArray[] = $root;
|
|
}
|
|
}
|
|
if ($parts) {
|
|
return $partsArray;
|
|
} else {
|
|
return $root;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Make the directory strucuture for the given id
|
|
*
|
|
* @param string $id cache id
|
|
* @return boolean true
|
|
*/
|
|
private function _recursiveMkdirAndChmod($id)
|
|
{
|
|
if ($this->_options['hashed_directory_level'] <=0) {
|
|
return true;
|
|
}
|
|
$partsArray = $this->_path($id, true);
|
|
foreach ($partsArray as $part) {
|
|
if (!is_dir($part)) {
|
|
@mkdir($part, $this->_options['hashed_directory_umask']);
|
|
@chmod($part, $this->_options['hashed_directory_umask']); // see #ZF-320 (this line is required in some configurations)
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Test if the given cache id is available (and still valid as a cache record)
|
|
*
|
|
* @param string $id Cache id
|
|
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
|
|
* @return boolean|mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
|
|
*/
|
|
private function _test($id, $doNotTestCacheValidity)
|
|
{
|
|
$metadatas = $this->_getMetadatas($id);
|
|
if (!$metadatas) {
|
|
return false;
|
|
}
|
|
if ($doNotTestCacheValidity || (time() <= $metadatas['expire'])) {
|
|
return $metadatas['mtime'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Return the file content of the given file
|
|
*
|
|
* @param string $file File complete path
|
|
* @return string File content (or false if problem)
|
|
*/
|
|
private function _fileGetContents($file)
|
|
{
|
|
$result = false;
|
|
if (!is_file($file)) {
|
|
return false;
|
|
}
|
|
if (function_exists('get_magic_quotes_runtime')) {
|
|
$mqr = @get_magic_quotes_runtime();
|
|
@set_magic_quotes_runtime(0);
|
|
}
|
|
$f = @fopen($file, 'rb');
|
|
if ($f) {
|
|
if ($this->_options['file_locking']) @flock($f, LOCK_SH);
|
|
$result = stream_get_contents($f);
|
|
if ($this->_options['file_locking']) @flock($f, LOCK_UN);
|
|
@fclose($f);
|
|
}
|
|
if (function_exists('set_magic_quotes_runtime')) {
|
|
@set_magic_quotes_runtime($mqr);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Put the given string into the given file
|
|
*
|
|
* @param string $file File complete path
|
|
* @param string $string String to put in file
|
|
* @return boolean true if no problem
|
|
*/
|
|
private function _filePutContents($file, $string)
|
|
{
|
|
$result = false;
|
|
$f = @fopen($file, 'ab+');
|
|
if ($f) {
|
|
if ($this->_options['file_locking']) @flock($f, LOCK_EX);
|
|
fseek($f, 0);
|
|
ftruncate($f, 0);
|
|
$tmp = @fwrite($f, $string);
|
|
if (!($tmp === FALSE)) {
|
|
$result = true;
|
|
}
|
|
@fclose($f);
|
|
}
|
|
@chmod($file, $this->_options['cache_file_umask']);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Transform a file name into cache id and return it
|
|
*
|
|
* @param string $fileName File name
|
|
* @return string Cache id
|
|
*/
|
|
private function _fileNameToId($fileName)
|
|
{
|
|
$prefix = $this->_options['file_name_prefix'];
|
|
return preg_replace('~^' . $prefix . '---(.*)$~', '$1', $fileName);
|
|
}
|
|
|
|
}
|