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PK ! $
h drivers/Cache_memcached.phpnu [ array(
'host' => '127.0.0.1',
'port' => 11211,
'weight' => 1
)
);
// ------------------------------------------------------------------------
/**
* Class constructor
*
* Setup Memcache(d)
*
* @return void
*/
public function __construct()
{
// Try to load memcached server info from the config file.
$CI =& get_instance();
$defaults = $this->_config['default'];
if ($CI->config->load('memcached', TRUE, TRUE))
{
$this->_config = $CI->config->config['memcached'];
}
if (class_exists('Memcached', FALSE))
{
$this->_memcached = new Memcached();
}
elseif (class_exists('Memcache', FALSE))
{
$this->_memcached = new Memcache();
}
else
{
log_message('error', 'Cache: Failed to create Memcache(d) object; extension not loaded?');
return;
}
foreach ($this->_config as $cache_server)
{
isset($cache_server['hostname']) OR $cache_server['hostname'] = $defaults['host'];
isset($cache_server['port']) OR $cache_server['port'] = $defaults['port'];
isset($cache_server['weight']) OR $cache_server['weight'] = $defaults['weight'];
if ($this->_memcached instanceof Memcache)
{
// Third parameter is persistence and defaults to TRUE.
$this->_memcached->addServer(
$cache_server['hostname'],
$cache_server['port'],
TRUE,
$cache_server['weight']
);
}
elseif ($this->_memcached instanceof Memcached)
{
$this->_memcached->addServer(
$cache_server['hostname'],
$cache_server['port'],
$cache_server['weight']
);
}
}
}
// ------------------------------------------------------------------------
/**
* Fetch from cache
*
* @param string $id Cache ID
* @return mixed Data on success, FALSE on failure
*/
public function get($id)
{
$data = $this->_memcached->get($id);
return is_array($data) ? $data[0] : $data;
}
// ------------------------------------------------------------------------
/**
* Save
*
* @param string $id Cache ID
* @param mixed $data Data being cached
* @param int $ttl Time to live
* @param bool $raw Whether to store the raw value
* @return bool TRUE on success, FALSE on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
if ($raw !== TRUE)
{
$data = array($data, time(), $ttl);
}
if ($this->_memcached instanceof Memcached)
{
return $this->_memcached->set($id, $data, $ttl);
}
elseif ($this->_memcached instanceof Memcache)
{
return $this->_memcached->set($id, $data, 0, $ttl);
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* Delete from Cache
*
* @param mixed $id key to be deleted.
* @return bool true on success, false on failure
*/
public function delete($id)
{
return $this->_memcached->delete($id);
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return mixed New value on success or FALSE on failure
*/
public function increment($id, $offset = 1)
{
if (($result = $this->_memcached->increment($id, $offset)) === FALSE)
{
return $this->_memcached->add($id, $offset) ? $offset : FALSE;
}
return $result;
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return mixed New value on success or FALSE on failure
*/
public function decrement($id, $offset = 1)
{
if (($result = $this->_memcached->decrement($id, $offset)) === FALSE)
{
return $this->_memcached->add($id, 0) ? 0 : FALSE;
}
return $result;
}
// ------------------------------------------------------------------------
/**
* Clean the Cache
*
* @return bool false on failure/true on success
*/
public function clean()
{
return $this->_memcached->flush();
}
// ------------------------------------------------------------------------
/**
* Cache Info
*
* @return mixed array on success, false on failure
*/
public function cache_info()
{
return $this->_memcached->getStats();
}
// ------------------------------------------------------------------------
/**
* Get Cache Metadata
*
* @param mixed $id key to get cache metadata on
* @return mixed FALSE on failure, array on success.
*/
public function get_metadata($id)
{
$stored = $this->_memcached->get($id);
if (count($stored) !== 3)
{
return FALSE;
}
list($data, $time, $ttl) = $stored;
return array(
'expire' => $time + $ttl,
'mtime' => $time,
'data' => $data
);
}
// ------------------------------------------------------------------------
/**
* Is supported
*
* Returns FALSE if memcached is not supported on the system.
* If it is, we setup the memcached object & return TRUE
*
* @return bool
*/
public function is_supported()
{
return (extension_loaded('memcached') OR extension_loaded('memcache'));
}
// ------------------------------------------------------------------------
/**
* Class destructor
*
* Closes the connection to Memcache(d) if present.
*
* @return void
*/
public function __destruct()
{
if ($this->_memcached instanceof Memcache)
{
$this->_memcached->close();
}
elseif ($this->_memcached instanceof Memcached && method_exists($this->_memcached, 'quit'))
{
$this->_memcached->quit();
}
}
}
PK ! drivers/Cache_dummy.phpnu [ load->helper('file');
$path = $CI->config->item('cache_path');
$this->_cache_path = ($path === '') ? APPPATH.'cache/' : $path;
}
// ------------------------------------------------------------------------
/**
* Fetch from cache
*
* @param string $id Cache ID
* @return mixed Data on success, FALSE on failure
*/
public function get($id)
{
$data = $this->_get($id);
return is_array($data) ? $data['data'] : FALSE;
}
// ------------------------------------------------------------------------
/**
* Save into cache
*
* @param string $id Cache ID
* @param mixed $data Data to store
* @param int $ttl Time to live in seconds
* @param bool $raw Whether to store the raw value (unused)
* @return bool TRUE on success, FALSE on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
$contents = array(
'time' => time(),
'ttl' => $ttl,
'data' => $data
);
if (write_file($this->_cache_path.$id, serialize($contents)))
{
chmod($this->_cache_path.$id, 0640);
return TRUE;
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* Delete from Cache
*
* @param mixed unique identifier of item in cache
* @return bool true on success/false on failure
*/
public function delete($id)
{
return is_file($this->_cache_path.$id) ? unlink($this->_cache_path.$id) : FALSE;
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return New value on success, FALSE on failure
*/
public function increment($id, $offset = 1)
{
$data = $this->_get($id);
if ($data === FALSE)
{
$data = array('data' => 0, 'ttl' => 60);
}
elseif ( ! is_int($data['data']))
{
return FALSE;
}
$new_value = $data['data'] + $offset;
return $this->save($id, $new_value, $data['ttl'])
? $new_value
: FALSE;
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return New value on success, FALSE on failure
*/
public function decrement($id, $offset = 1)
{
$data = $this->_get($id);
if ($data === FALSE)
{
$data = array('data' => 0, 'ttl' => 60);
}
elseif ( ! is_int($data['data']))
{
return FALSE;
}
$new_value = $data['data'] - $offset;
return $this->save($id, $new_value, $data['ttl'])
? $new_value
: FALSE;
}
// ------------------------------------------------------------------------
/**
* Clean the Cache
*
* @return bool false on failure/true on success
*/
public function clean()
{
return delete_files($this->_cache_path, FALSE, TRUE);
}
// ------------------------------------------------------------------------
/**
* Cache Info
*
* Not supported by file-based caching
*
* @param string user/filehits
* @return mixed FALSE
*/
public function cache_info($type = NULL)
{
return get_dir_file_info($this->_cache_path);
}
// ------------------------------------------------------------------------
/**
* Get Cache Metadata
*
* @param mixed key to get cache metadata on
* @return mixed FALSE on failure, array on success.
*/
public function get_metadata($id)
{
if ( ! is_file($this->_cache_path.$id))
{
return FALSE;
}
$data = unserialize(file_get_contents($this->_cache_path.$id));
if (is_array($data))
{
$mtime = filemtime($this->_cache_path.$id);
if ( ! isset($data['ttl'], $data['time']))
{
return FALSE;
}
return array(
'expire' => $data['time'] + $data['ttl'],
'mtime' => $mtime
);
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* Is supported
*
* In the file driver, check to see that the cache directory is indeed writable
*
* @return bool
*/
public function is_supported()
{
return is_really_writable($this->_cache_path);
}
// ------------------------------------------------------------------------
/**
* Get all data
*
* Internal method to get all the relevant data about a cache item
*
* @param string $id Cache ID
* @return mixed Data array on success or FALSE on failure
*/
protected function _get($id)
{
if ( ! is_file($this->_cache_path.$id))
{
return FALSE;
}
$data = unserialize(file_get_contents($this->_cache_path.$id));
if ($data['ttl'] > 0 && time() > $data['time'] + $data['ttl'])
{
unlink($this->_cache_path.$id);
return FALSE;
}
return $data;
}
}
PK ! drivers/Cache_redis.phpnu [
* @link
*/
class CI_Cache_redis extends CI_Driver
{
/**
* Default config
*
* @static
* @var array
*/
protected static $_default_config = array(
'socket_type' => 'tcp',
'host' => '127.0.0.1',
'password' => NULL,
'port' => 6379,
'timeout' => 0
);
/**
* Redis connection
*
* @var Redis
*/
protected $_redis;
/**
* An internal cache for storing keys of serialized values.
*
* @var array
*/
protected $_serialized = array();
// ------------------------------------------------------------------------
/**
* Class constructor
*
* Setup Redis
*
* Loads Redis config file if present. Will halt execution
* if a Redis connection can't be established.
*
* @return void
* @see Redis::connect()
*/
public function __construct()
{
if ( ! $this->is_supported())
{
log_message('error', 'Cache: Failed to create Redis object; extension not loaded?');
return;
}
$CI =& get_instance();
if ($CI->config->load('redis', TRUE, TRUE))
{
$config = array_merge(self::$_default_config, $CI->config->item('redis'));
}
else
{
$config = self::$_default_config;
}
$this->_redis = new Redis();
try
{
if ($config['socket_type'] === 'unix')
{
$success = $this->_redis->connect($config['socket']);
}
else // tcp socket
{
$success = $this->_redis->connect($config['host'], $config['port'], $config['timeout']);
}
if ( ! $success)
{
log_message('error', 'Cache: Redis connection failed. Check your configuration.');
}
if (isset($config['password']) && ! $this->_redis->auth($config['password']))
{
log_message('error', 'Cache: Redis authentication failed.');
}
}
catch (RedisException $e)
{
log_message('error', 'Cache: Redis connection refused ('.$e->getMessage().')');
}
// Initialize the index of serialized values.
$serialized = $this->_redis->sMembers('_ci_redis_serialized');
empty($serialized) OR $this->_serialized = array_flip($serialized);
}
// ------------------------------------------------------------------------
/**
* Get cache
*
* @param string $key Cache ID
* @return mixed
*/
public function get($key)
{
$value = $this->_redis->get($key);
if ($value !== FALSE && isset($this->_serialized[$key]))
{
return unserialize($value);
}
return $value;
}
// ------------------------------------------------------------------------
/**
* Save cache
*
* @param string $id Cache ID
* @param mixed $data Data to save
* @param int $ttl Time to live in seconds
* @param bool $raw Whether to store the raw value (unused)
* @return bool TRUE on success, FALSE on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
if (is_array($data) OR is_object($data))
{
if ( ! $this->_redis->sIsMember('_ci_redis_serialized', $id) && ! $this->_redis->sAdd('_ci_redis_serialized', $id))
{
return FALSE;
}
isset($this->_serialized[$id]) OR $this->_serialized[$id] = TRUE;
$data = serialize($data);
}
elseif (isset($this->_serialized[$id]))
{
$this->_serialized[$id] = NULL;
$this->_redis->sRemove('_ci_redis_serialized', $id);
}
return $this->_redis->set($id, $data, $ttl);
}
// ------------------------------------------------------------------------
/**
* Delete from cache
*
* @param string $key Cache key
* @return bool
*/
public function delete($key)
{
if ($this->_redis->delete($key) !== 1)
{
return FALSE;
}
if (isset($this->_serialized[$key]))
{
$this->_serialized[$key] = NULL;
$this->_redis->sRemove('_ci_redis_serialized', $key);
}
return TRUE;
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return mixed New value on success or FALSE on failure
*/
public function increment($id, $offset = 1)
{
return $this->_redis->incr($id, $offset);
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return mixed New value on success or FALSE on failure
*/
public function decrement($id, $offset = 1)
{
return $this->_redis->decr($id, $offset);
}
// ------------------------------------------------------------------------
/**
* Clean cache
*
* @return bool
* @see Redis::flushDB()
*/
public function clean()
{
return $this->_redis->flushDB();
}
// ------------------------------------------------------------------------
/**
* Get cache driver info
*
* @param string $type Not supported in Redis.
* Only included in order to offer a
* consistent cache API.
* @return array
* @see Redis::info()
*/
public function cache_info($type = NULL)
{
return $this->_redis->info();
}
// ------------------------------------------------------------------------
/**
* Get cache metadata
*
* @param string $key Cache key
* @return array
*/
public function get_metadata($key)
{
$value = $this->get($key);
if ($value !== FALSE)
{
return array(
'expire' => time() + $this->_redis->ttl($key),
'data' => $value
);
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* Check if Redis driver is supported
*
* @return bool
*/
public function is_supported()
{
return extension_loaded('redis');
}
// ------------------------------------------------------------------------
/**
* Class destructor
*
* Closes the connection to Redis if present.
*
* @return void
*/
public function __destruct()
{
if ($this->_redis)
{
$this->_redis->close();
}
}
}
PK ! drivers/Cache_apc.phpnu [ is_supported())
{
log_message('error', 'Cache: Failed to initialize APC; extension not loaded/enabled?');
}
}
// ------------------------------------------------------------------------
/**
* Get
*
* Look for a value in the cache. If it exists, return the data
* if not, return FALSE
*
* @param string
* @return mixed value that is stored/FALSE on failure
*/
public function get($id)
{
$success = FALSE;
$data = apc_fetch($id, $success);
return ($success === TRUE) ? $data : FALSE;
}
// ------------------------------------------------------------------------
/**
* Cache Save
*
* @param string $id Cache ID
* @param mixed $data Data to store
* @param int $ttl Length of time (in seconds) to cache the data
* @param bool $raw Whether to store the raw value (unused)
* @return bool TRUE on success, FALSE on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
return apc_store($id, $data, (int) $ttl);
}
// ------------------------------------------------------------------------
/**
* Delete from Cache
*
* @param mixed unique identifier of the item in the cache
* @return bool true on success/false on failure
*/
public function delete($id)
{
return apc_delete($id);
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return mixed New value on success or FALSE on failure
*/
public function increment($id, $offset = 1)
{
return apc_inc($id, $offset);
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return mixed New value on success or FALSE on failure
*/
public function decrement($id, $offset = 1)
{
return apc_dec($id, $offset);
}
// ------------------------------------------------------------------------
/**
* Clean the cache
*
* @return bool false on failure/true on success
*/
public function clean()
{
return apc_clear_cache('user');
}
// ------------------------------------------------------------------------
/**
* Cache Info
*
* @param string user/filehits
* @return mixed array on success, false on failure
*/
public function cache_info($type = NULL)
{
return apc_cache_info($type);
}
// ------------------------------------------------------------------------
/**
* Get Cache Metadata
*
* @param mixed key to get cache metadata on
* @return mixed array on success/false on failure
*/
public function get_metadata($id)
{
$cache_info = apc_cache_info('user', FALSE);
if (empty($cache_info) OR empty($cache_info['cache_list']))
{
return FALSE;
}
foreach ($cache_info['cache_list'] as &$entry)
{
if ($entry['info'] !== $id)
{
continue;
}
$success = FALSE;
$metadata = array(
'expire' => ($entry['ttl'] ? $entry['mtime'] + $entry['ttl'] : 0),
'mtime' => $entry['ttl'],
'data' => apc_fetch($id, $success)
);
return ($success === TRUE) ? $metadata : FALSE;
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* is_supported()
*
* Check to see if APC is available on this system, bail if it isn't.
*
* @return bool
*/
public function is_supported()
{
return (extension_loaded('apc') && ini_get('apc.enabled'));
}
}
PK ! d# drivers/Cache_wincache.phpnu [ is_supported())
{
log_message('error', 'Cache: Failed to initialize Wincache; extension not loaded/enabled?');
}
}
// ------------------------------------------------------------------------
/**
* Get
*
* Look for a value in the cache. If it exists, return the data,
* if not, return FALSE
*
* @param string $id Cache Ide
* @return mixed Value that is stored/FALSE on failure
*/
public function get($id)
{
$success = FALSE;
$data = wincache_ucache_get($id, $success);
// Success returned by reference from wincache_ucache_get()
return ($success) ? $data : FALSE;
}
// ------------------------------------------------------------------------
/**
* Cache Save
*
* @param string $id Cache ID
* @param mixed $data Data to store
* @param int $ttl Time to live (in seconds)
* @param bool $raw Whether to store the raw value (unused)
* @return bool true on success/false on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
return wincache_ucache_set($id, $data, $ttl);
}
// ------------------------------------------------------------------------
/**
* Delete from Cache
*
* @param mixed unique identifier of the item in the cache
* @return bool true on success/false on failure
*/
public function delete($id)
{
return wincache_ucache_delete($id);
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return mixed New value on success or FALSE on failure
*/
public function increment($id, $offset = 1)
{
$success = FALSE;
$value = wincache_ucache_inc($id, $offset, $success);
return ($success === TRUE) ? $value : FALSE;
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return mixed New value on success or FALSE on failure
*/
public function decrement($id, $offset = 1)
{
$success = FALSE;
$value = wincache_ucache_dec($id, $offset, $success);
return ($success === TRUE) ? $value : FALSE;
}
// ------------------------------------------------------------------------
/**
* Clean the cache
*
* @return bool false on failure/true on success
*/
public function clean()
{
return wincache_ucache_clear();
}
// ------------------------------------------------------------------------
/**
* Cache Info
*
* @return mixed array on success, false on failure
*/
public function cache_info()
{
return wincache_ucache_info(TRUE);
}
// ------------------------------------------------------------------------
/**
* Get Cache Metadata
*
* @param mixed key to get cache metadata on
* @return mixed array on success/false on failure
*/
public function get_metadata($id)
{
if ($stored = wincache_ucache_info(FALSE, $id))
{
$age = $stored['ucache_entries'][1]['age_seconds'];
$ttl = $stored['ucache_entries'][1]['ttl_seconds'];
$hitcount = $stored['ucache_entries'][1]['hitcount'];
return array(
'expire' => $ttl - $age,
'hitcount' => $hitcount,
'age' => $age,
'ttl' => $ttl
);
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* is_supported()
*
* Check to see if WinCache is available on this system, bail if it isn't.
*
* @return bool
*/
public function is_supported()
{
return (extension_loaded('wincache') && ini_get('wincache.ucenabled'));
}
}
PK ! ( drivers/index.htmlnu [
403 Forbidden
Directory access is forbidden.
PK ! w Cache.phpnu [ _adapter = $config['adapter'];
isset($config['backup']) && $this->_backup_driver = $config['backup'];
isset($config['key_prefix']) && $this->key_prefix = $config['key_prefix'];
// If the specified adapter isn't available, check the backup.
if ( ! $this->is_supported($this->_adapter))
{
if ( ! $this->is_supported($this->_backup_driver))
{
// Backup isn't supported either. Default to 'Dummy' driver.
log_message('error', 'Cache adapter "'.$this->_adapter.'" and backup "'.$this->_backup_driver.'" are both unavailable. Cache is now using "Dummy" adapter.');
$this->_adapter = 'dummy';
}
else
{
// Backup is supported. Set it to primary.
log_message('debug', 'Cache adapter "'.$this->_adapter.'" is unavailable. Falling back to "'.$this->_backup_driver.'" backup adapter.');
$this->_adapter = $this->_backup_driver;
}
}
}
// ------------------------------------------------------------------------
/**
* Get
*
* Look for a value in the cache. If it exists, return the data
* if not, return FALSE
*
* @param string $id
* @return mixed value matching $id or FALSE on failure
*/
public function get($id)
{
return $this->{$this->_adapter}->get($this->key_prefix.$id);
}
// ------------------------------------------------------------------------
/**
* Cache Save
*
* @param string $id Cache ID
* @param mixed $data Data to store
* @param int $ttl Cache TTL (in seconds)
* @param bool $raw Whether to store the raw value
* @return bool TRUE on success, FALSE on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
return $this->{$this->_adapter}->save($this->key_prefix.$id, $data, $ttl, $raw);
}
// ------------------------------------------------------------------------
/**
* Delete from Cache
*
* @param string $id Cache ID
* @return bool TRUE on success, FALSE on failure
*/
public function delete($id)
{
return $this->{$this->_adapter}->delete($this->key_prefix.$id);
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return mixed New value on success or FALSE on failure
*/
public function increment($id, $offset = 1)
{
return $this->{$this->_adapter}->increment($this->key_prefix.$id, $offset);
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return mixed New value on success or FALSE on failure
*/
public function decrement($id, $offset = 1)
{
return $this->{$this->_adapter}->decrement($this->key_prefix.$id, $offset);
}
// ------------------------------------------------------------------------
/**
* Clean the cache
*
* @return bool TRUE on success, FALSE on failure
*/
public function clean()
{
return $this->{$this->_adapter}->clean();
}
// ------------------------------------------------------------------------
/**
* Cache Info
*
* @param string $type = 'user' user/filehits
* @return mixed array containing cache info on success OR FALSE on failure
*/
public function cache_info($type = 'user')
{
return $this->{$this->_adapter}->cache_info($type);
}
// ------------------------------------------------------------------------
/**
* Get Cache Metadata
*
* @param string $id key to get cache metadata on
* @return mixed cache item metadata
*/
public function get_metadata($id)
{
return $this->{$this->_adapter}->get_metadata($this->key_prefix.$id);
}
// ------------------------------------------------------------------------
/**
* Is the requested driver supported in this environment?
*
* @param string $driver The driver to test
* @return array
*/
public function is_supported($driver)
{
static $support;
if ( ! isset($support, $support[$driver]))
{
$support[$driver] = $this->{$driver}->is_supported();
}
return $support[$driver];
}
}
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