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| <?php
class axMissingFileException extends RuntimeException {
public function __construct ($classname, $code = 0) {
parent::__construct("Class $classname is missing", $code);
}
}
interface axSerializable {
public function __sleep ();
public function __wakeup ();
}
interface axCacheAdapter {
public function __construct (axCacheManager $manager, $uri, array $options = array(), array & $data = array());
public function unfreeze ($data);
public function freeze ($data, $value);
public function validate ();
public function update ();
public function flush ();
public function getType ();
}
class axCacheManager {
protected $_cacheFile;
protected $_adapters;
protected $_caches;
public function __construct ($cache_file) {
$this->_cacheFile = $cache_file;
$this->_adapters = array();
if (!$r = $this->_load()) {
$this->_caches = array();
}
}
public function hasCache ($name) {
if (isset($this->_caches[$name]) && !isset($this->_adapters[$name]))
return $this->_createCache($name);
return isset($this->_adapters[$name]);
}
public function getCache ($name) {
return $this->hasCache($name) ? $this->_adapters[$name] : null;
}
public function setCache ($name, $type, $uri, array $options = array()) {
if ($this->hasCache($name))
return false;
switch ($type) {
case 'file': $type = 'axFileCacheAdapter'; break;
case 'session': $type = 'axSessionCacheAdapter'; break;
case 'memory': $type = 'axMemoryCacheAdapter'; break;
}
if (!class_exists($type, true))
throw new axMissingClassException($type);
if (!in_array('axCacheAdapter', class_implements($type)))
throw new RuntimeException("Class $type doesn't implement axCacheAdapter");
$this->_caches[$name] = array(
'adapter' => $type,
'uri' => $uri,
'options' => $options,
'data' => array(),
);
return $this->_createCache($name);
}
public function destroyCache ($cache) {
if (!$this->hasCache($cache))
return false;
if ($this->getCache($cache)->flush()) {
unset($this->_adapters[$cache]);
return $this->save();
}
return false;
}
public function flushCache ($cache) {
if (!$this->hasCache($cache))
return false;
return $this->getCache($cache)->flush();
}
public function getCacheType ($cache) {
if (!$this->hasCache($cache))
return false;
return $this->getCache($cache)->getType();
}
public function save () {
return (bool)file_put_contents($this->_cacheFile, '<?php $caches='.var_export($this->_caches, true).';');
}
protected function _load () {
if (!is_file($this->_cacheFile) || !is_readable($this->_cacheFile)) {
return false;
}
if (!require $this->_cacheFile) {
unlink($this->_cacheFile);
return false;
}
$this->_caches = $caches;
return true;
}
protected function _createCache ($name) {
if (!isset($this->_caches[$name]))
return false;
$parameters = & $this->_caches[$name];
if (!isset($parameters['adapter'], $parameters['uri'], $parameters['options'], $parameters['data']))
return false;
$adapter = $parameters['adapter'];
return $this->_adapters[$name] = new $adapter(
$this,
$parameters['uri'],
$parameters['options'],
$parameters['data']
);
}
}
abstract class axBaseCacheAdapter implements axCacheAdapter {
protected $_manager;
protected $_uri;
protected $_options;
protected $_data;
public function __construct (axCacheManager $manager, $uri, array $options = array(), array & $data = array()) {
if (!$manager)
throw new InvalidArgumentException("Manager cannot be null");
if (!$uri || !is_string($uri))
throw new InvalidArgumentException("Invalid URI");
$this->_manager = $manager;
$this->_uri = $uri;
$this->_options = $options;
$this->_data = & $data;
}
public function getUri () {
return $this->_uri;
}
public function getOption ($name) {
return isset($this->_options['name']) ? $this->_options['name'] : null;
}
public function getOptions () {
return $this->_options;
}
public function update () {
return $this->_manager->save($this);
}
}
class axFileCacheAdapter extends axBaseCacheAdapter {
protected $_path;
public function __construct (axCacheManager $manager, $uri, array $options = array(), array & $data = array()) {
$options += array(
'prefix' => '',
'extension' => '.cache',
'base64' => false,
'lifetime' => 3600,
'serialize' => false,
);
parent::__construct($manager, $uri, $options, $data);
if (strpos($this->_uri, 'file://') !== false)
$this->_path = substr($this->_uri, 7);
else
$this->_path = $this->_uri;
if (!$this->validate()) {
if (!is_dir($this->_path))
throw new RuntimeException("$this->_path is not a valid directory");
if (!is_writable($this->_path))
throw new RuntimeException("$this->_path is not writeable");
}
}
public function unfreeze ($name) {
if (!$this->validate())
return false;
$filename = $this->_getFilenameFromData($name);
if (!is_file($filename) || !isset($this->_data[$name]))
return false;
if ($this->_data[$name] && (time() - $this->_data[$name]) > $this->_options['lifetime']) {
unlink($filename);
return false;
}
if (!$buffer = file_get_contents($filename))
return false;
if ($this->_options['base64'])
$buffer = base64_decode($buffer);
return $this->_options['serialize'] ? unserialize($buffer) : $buffer;
}
public function freeze ($name, $value) {
if (!$this->validate())
return false;
if ($this->_options['serialize'] && is_object($value) && !$value instanceof axSerializable)
trigger_error("It is unsafe to store objects that doesn't implement axSerializable", E_USER_NOTICE);
$filename = $this->_getFilenameFromData($name);
$buffer = $this->_options['serialize'] ? serialize($value) : $value;
if ($this->_options['base64'])
$buffer = base64_encode($buffer);
if (file_put_contents($filename, $buffer)) {
$this->_data[$name] = time();
return $this->update();
}
return false;
}
public function validate () {
return is_dir($this->_path) && is_writable($this->_path);
}
public function flush () {
if (!$this->validate())
return false;
try {
$directory = new DirectoryIterator($this->_path);
}
catch (Exception $e) {
trigger_error("Cannot open directory $this->_path: " . $e->getMessage(), E_USER_WARNING);
return false;
}
$result = true;
$pattern = "~^{$this->_options['prefix']}.*{$this->_options['extension']}$~";
foreach ($directory as $file) {
if ($file->isFile() && preg_match($pattern, $file->getFilename()))
$result &= unlink($file->getPathname());
}
return $result && $this->update();
}
public function getType () {
return 'file';
}
protected function _getFilenameFromData ($name) {
return rtrim($this->_path, '/') . "/{$this->_options['prefix']}{$name}{$this->_options['extension']}";
}
} |
Gestionnaire de cache simple
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