diff options
Diffstat (limited to 'system/libraries/Session')
| -rw-r--r-- | system/libraries/Session/Session.php | 961 | ||||
| -rw-r--r-- | system/libraries/Session/SessionHandlerInterface.php | 62 | ||||
| -rw-r--r-- | system/libraries/Session/Session_driver.php | 163 | ||||
| -rw-r--r-- | system/libraries/Session/drivers/Session_cookie.php | 816 | ||||
| -rw-r--r-- | system/libraries/Session/drivers/Session_database_driver.php | 303 | ||||
| -rw-r--r-- | system/libraries/Session/drivers/Session_files_driver.php | 298 | ||||
| -rw-r--r-- | system/libraries/Session/drivers/Session_memcached_driver.php | 312 | ||||
| -rw-r--r-- | system/libraries/Session/drivers/Session_native.php | 257 | ||||
| -rw-r--r-- | system/libraries/Session/drivers/Session_redis_driver.php | 332 |
9 files changed, 2005 insertions, 1499 deletions
diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php index 452afd5e5..9c3b2b06c 100644 --- a/system/libraries/Session/Session.php +++ b/system/libraries/Session/Session.php @@ -40,729 +40,838 @@ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Session Class * - * The user interface defined by EllisLab, now with puggable drivers to manage different storage mechanisms. - * By default, the cookie session driver will load, but the 'sess_driver' config/param item (see above) can be - * used to specify the 'native' driver, or any other you might create. - * Once loaded, this driver setup is a drop-in replacement for the former CI_Session library, taking its place as the - * 'session' member of the global controller framework (e.g.: $CI->session or $this->session). - * In keeping with the CI_Driver methodology, multiple drivers may be loaded, although this might be a bit confusing. - * The CI_Session library class keeps track of the most recently loaded driver as "current" to call for driver methods. - * Ideally, one driver is loaded and all calls go directly through the main library interface. However, any methods - * called through the specific driver will switch the "current" driver to itself before invoking the library method - * (which will then call back into the driver for low-level operations). So, alternation between two drivers can be - * achieved by specifying which driver to use for each call (e.g.: $this->session->native->set_userdata('foo', 'bar'); - * $this->session->cookie->userdata('foo'); $this->session->native->unset_userdata('foo');). Notice in the previous - * example that the _native_ userdata value 'foo' would be set to 'bar', which would NOT be returned by the call for - * the _cookie_ userdata 'foo', nor would the _cookie_ value be unset by the call to unset the _native_ 'foo' value. - * * @package CodeIgniter * @subpackage Libraries * @category Sessions - * @author EllisLab Dev Team + * @author Andrey Andreev * @link http://codeigniter.com/user_guide/libraries/sessions.html */ -class CI_Session extends CI_Driver_Library { - - /** - * Initialization parameters - * - * @var array - */ - public $params = array(); - - /** - * Valid drivers list - * - * @var array - */ - public $valid_drivers = array('native', 'cookie'); - - /** - * Current driver in use - * - * @var string - */ - public $current = NULL; - - /** - * User data - * - * @var array - */ - protected $userdata = array(); - - // ------------------------------------------------------------------------ +class CI_Session { - const FLASHDATA_KEY = 'flash'; - const FLASHDATA_NEW = ':new:'; - const FLASHDATA_OLD = ':old:'; - const FLASHDATA_EXP = ':exp:'; - const EXPIRATION_KEY = '__expirations'; - const TEMP_EXP_DEF = 300; + protected $_driver = 'files'; + protected $_config; // ------------------------------------------------------------------------ /** - * CI_Session constructor + * Class constructor * - * The constructor loads the configured driver ('sess_driver' in config.php or as a parameter), running - * routines in its constructor, and manages flashdata aging. - * - * @param array Configuration parameters + * @param array $params Configuration parameters * @return void */ public function __construct(array $params = array()) { - $_config =& get_instance()->config; - // No sessions under CLI if (is_cli()) { + log_message('debug', 'Session: Initialization under CLI aborted.'); return; } - - log_message('debug', 'CI_Session Class Initialized'); - - // Add possible extra entries to our valid drivers list - $drivers = isset($params['sess_valid_drivers']) ? $params['sess_valid_drivers'] : $_config->item('sess_valid_drivers'); - if ( ! empty($drivers)) + elseif ((bool) ini_get('session.auto_start')) + { + log_message('error', 'Session: session.auto_start is enabled in php.ini. Aborting.'); + return; + } + elseif ( ! empty($params['driver'])) { - $drivers = array_map('strtolower', (array) $drivers); - $this->valid_drivers = array_merge($this->valid_drivers, array_diff($drivers, $this->valid_drivers)); + $this->_driver = $params['driver']; + unset($params['driver']); } - - // Get driver to load - $driver = isset($params['sess_driver']) ? $params['sess_driver'] : $_config->item('sess_driver'); - if ( ! $driver) + elseif ($driver = config_item('sess_driver')) + { + $this->_driver = $driver; + } + // Note: BC workaround + elseif (config_item('sess_use_database')) { - log_message('debug', "Session: No driver name is configured, defaulting to 'cookie'."); - $driver = 'cookie'; + $this->_driver = 'database'; } - if ( ! in_array($driver, $this->valid_drivers)) + if (($class = $this->_ci_load_classes($this->_driver)) === FALSE) { - log_message('error', 'Session: Configured driver name is not valid, aborting.'); return; } - // Save a copy of parameters in case drivers need access - $this->params = $params; + // Configuration ... + $this->_configure($params); + + $class = new $class($this->_config); + if ($class instanceof SessionHandlerInterface) + { + if (is_php('5.4')) + { + session_set_save_handler($class, TRUE); + } + else + { + session_set_save_handler( + array($class, 'open'), + array($class, 'close'), + array($class, 'read'), + array($class, 'write'), + array($class, 'destroy'), + array($class, 'gc') + ); + + register_shutdown_function('session_write_close'); + } + } + else + { + log_message('error', "Session: Driver '".$this->_driver."' doesn't implement SessionHandlerInterface. Aborting."); + return; + } - // Load driver and get array reference - $this->load_driver($driver); + // Sanitize the cookie, because apparently PHP doesn't do that for userspace handlers + if (isset($_COOKIE[$this->_config['cookie_name']]) + && ( + ! is_string($_COOKIE[$this->_config['cookie_name']]) + OR ! preg_match('/^[0-9a-f]{40}$/', $_COOKIE[$this->_config['cookie_name']]) + ) + ) + { + unset($_COOKIE[$this->_config['cookie_name']]); + } - // Delete 'old' flashdata (from last request) - $this->_flashdata_sweep(); + session_start(); - // Mark all new flashdata as old (data will be deleted before next request) - $this->_flashdata_mark(); + // Is session ID auto-regeneration configured? (ignoring ajax requests) + if ( ! empty($_SERVER['HTTP_X_REQUESTED_WITH']) + && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest' + && ($regenerate_time = config_item('sess_time_to_update')) > 0 + ) + { + if ( ! isset($_SESSION['__ci_last_regenerate'])) + { + $_SESSION['__ci_last_regenerate'] = time(); + } + elseif ($_SESSION['__ci_last_regenerate'] < (time() - $regenerate_time)) + { + $this->sess_regenerate(FALSE); + } + } + // Another work-around ... PHP doesn't seem to send the session cookie + // unless it is being currently created or regenerated + elseif (isset($_COOKIE[$this->_config['cookie_name']]) && $_COOKIE[$this->_config['cookie_name']] === session_id()) + { + setcookie( + $this->_config['cookie_name'], + session_id(), + (empty($this->_config['cookie_lifetime']) ? 0 : time() + $this->_config['cookie_lifetime']), + $this->_config['cookie_path'], + $this->_config['cookie_domain'], + $this->_config['cookie_secure'], + TRUE + ); + } - // Delete expired tempdata - $this->_tempdata_sweep(); + $this->_ci_init_vars(); - log_message('debug', 'CI_Session routines successfully run'); + log_message('debug', "Session: Class initialized using '".$this->_driver."' driver."); } // ------------------------------------------------------------------------ - /** - * Loads session storage driver - * - * @param string Driver classname - * @return object Loaded driver object - */ - public function load_driver($driver) + protected function _ci_load_classes($driver) { - // Save reference to most recently loaded driver as library default and sync userdata - $this->current = parent::load_driver($driver); - $this->userdata =& $this->current->get_userdata(); - return $this->current; - } + // PHP 5.4 compatibility + interface_exists('SessionHandlerInterface', FALSE) OR require_once(BASEPATH.'libraries/Session/SessionHandlerInterface.php'); - // ------------------------------------------------------------------------ + $prefix = config_item('subclass_prefix'); - /** - * Select default session storage driver - * - * @param string Driver name - * @return void - */ - public function select_driver($driver) - { - // Validate driver name - $prefix = (string) get_instance()->config->item('subclass_prefix'); - $child = strtolower(str_replace(array('CI_', $prefix, $this->lib_name.'_'), '', $driver)); - if (in_array($child, array_map('strtolower', $this->valid_drivers))) + if ( ! class_exists('CI_Session_driver', FALSE)) { - // See if driver is loaded - if (isset($this->$child)) + require_once( + file_exists(APPPATH.'libraries/Session/Session_driver.php') + ? APPPATH.'libraries/Session/Session_driver.php' + : BASEPATH.'libraries/Session/Session_driver.php' + ); + + if (file_exists($file_path = APPPATH.'libraries/Session/'.$prefix.'Session_driver.php')) { - // See if driver is already current - if ($this->$child !== $this->current) - { - // Make driver current and sync userdata - $this->current = $this->$child; - $this->userdata =& $this->current->get_userdata(); - } + require_once($file_path); + } + } + + $class = 'Session_'.$driver.'_driver'; + + // Allow custom drivers without the CI_ or MY_ prefix + if ( ! class_exists($class, FALSE) && file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$class.'.php')) + { + require_once($file_path); + if (class_exists($class, FALSE)) + { + return $class; + } + } + + if ( ! class_exists('CI_'.$class, FALSE)) + { + if (file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$class.'.php') OR file_exists($file_path = BASEPATH.'libraries/Session/drivers/'.$class.'.php')) + { + require_once($file_path); + } + + if ( ! class_exists('CI_'.$class, FALSE) && ! class_exists($class, FALSE)) + { + log_message('error', "Session: Configured driver '".$driver."' was not found. Aborting."); + return FALSE; + } + } + + if ( ! class_exists($prefix.$class) && file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$prefix.$class.'.php')) + { + require_once($file_path); + if (class_exists($prefix.$class, FALSE)) + { + return $prefix.$class; } else { - // Load new driver - $this->load_driver($child); + log_message('debug', 'Session: '.$prefix.$class.".php found but it doesn't declare class ".$prefix.$class.'.'); } } + + return 'CI_'.$class; } // ------------------------------------------------------------------------ /** - * Destroy the current session + * Configuration + * + * Handle input parameters and configuration defaults * + * @param array &$params Input parameters * @return void */ - public function sess_destroy() + protected function _configure(&$params) { - // Just call destroy on driver - $this->current->sess_destroy(); - } + $expiration = config_item('sess_expiration'); - // ------------------------------------------------------------------------ + if (isset($params['cookie_lifetime'])) + { + $params['cookie_lifetime'] = (int) $params['cookie_lifetime']; + } + else + { + $params['cookie_lifetime'] = ( ! isset($expiration) && config_item('sess_expire_on_close')) + ? 0 : (int) $expiration; + } - /** - * Regenerate the current session - * - * @param bool Destroy session data flag (default: false) - * @return void - */ - public function sess_regenerate($destroy = FALSE) - { - // Call regenerate on driver and resync userdata - $this->current->sess_regenerate($destroy); - $this->userdata =& $this->current->get_userdata(); - } + isset($params['cookie_name']) OR $params['cookie_name'] = config_item('sess_cookie_name'); + if (empty($params['cookie_name'])) + { + $params['cookie_name'] = ini_get('session.name'); + } + else + { + ini_set('session.name', $params['cookie_name']); + } - // ------------------------------------------------------------------------ + isset($params['cookie_path']) OR $params['cookie_path'] = config_item('cookie_path'); + isset($params['cookie_domain']) OR $params['cookie_domain'] = config_item('cookie_domain'); + isset($params['cookie_secure']) OR $params['cookie_secure'] = (bool) config_item('cookie_secure'); - /** - * Fetch a specific item from the session array - * - * @param string Item key - * @return string Item value or NULL if not found - */ - public function userdata($item = NULL) - { - if (isset($item)) + session_set_cookie_params( + $params['cookie_lifetime'], + $params['cookie_path'], + $params['cookie_domain'], + $params['cookie_secure'], + TRUE // HttpOnly; Yes, this is intentional and not configurable for security reasons + ); + + if (empty($expiration)) + { + $params['expiration'] = (int) ini_get('session.gc_maxlifetime'); + } + else { - return isset($this->userdata[$item]) ? $this->userdata[$item] : NULL; + $params['expiration'] = (int) $expiration; + ini_set('session.gc_maxlifetime', $expiration); } - return isset($this->userdata) ? $this->userdata : array(); - } + $params['match_ip'] = (bool) (isset($params['match_ip']) ? $params['match_ip'] : config_item('sess_match_ip')); - // ------------------------------------------------------------------------ + isset($params['save_path']) OR $params['save_path'] = config_item('sess_save_path'); - /** - * Fetch all session data - * - * @deprecated 3.0.0 Use userdata() with no parameters instead - * @return array User data array - */ - public function all_userdata() - { - return isset($this->userdata) ? $this->userdata : array(); + $this->_config = $params; + + // Security is king + ini_set('session.use_trans_id', 0); + ini_set('session.use_strict_mode', 1); + ini_set('session.use_cookies', 1); + ini_set('session.use_only_cookies', 1); + ini_set('session.hash_function', 1); + ini_set('session.hash_bits_per_character', 4); } // ------------------------------------------------------------------------ /** - * Add or change data in the "userdata" array + * Handle temporary variables + * + * Clears old "flash" data, marks the new one for deletion and handles + * "temp" data deletion. * - * @param mixed Item name or array of items - * @param string Item value or empty string * @return void */ - public function set_userdata($newdata, $newval = '') + protected function _ci_init_vars() { - // Wrap params as array if singular - if (is_string($newdata)) + if ( ! empty($_SESSION['__ci_vars'])) { - $newdata = array($newdata => $newval); - } + $current_time = time(); - // Set each name/value pair - if (count($newdata) > 0) - { - foreach ($newdata as $key => $val) + foreach ($_SESSION['__ci_vars'] as $key => &$value) { - $this->userdata[$key] = $val; + if ($value === 'new') + { + $_SESSION['__ci_vars'][$key] = 'old'; + } + // Hacky, but 'old' will (implicitly) always be less than time() ;) + // DO NOT move this above the 'new' check! + elseif ($value < $current_time) + { + unset($_SESSION[$key], $_SESSION['__ci_vars'][$key]); + } } - } - // Tell driver data changed - $this->current->sess_save(); + if (empty($_SESSION['__ci_vars'])) + { + unset($_SESSION['__ci_vars']); + } + } } // ------------------------------------------------------------------------ /** - * Delete a session variable from the "userdata" array + * Mark as flash * - * @param mixed Item name or array of item names - * @return void + * @param mixed $key Session data key(s) + * @return bool */ - public function unset_userdata($newdata) + public function mark_as_flash($key) { - // Wrap single name as array - if (is_string($newdata)) + if (is_array($key)) { - $newdata = array($newdata => ''); + for ($i = 0, $c = count($key); $i < $c; $i++) + { + if ( ! isset($_SESSION[$key[$i]])) + { + return FALSE; + } + } + + $new = array_fill_keys($key, 'new'); + + $_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars']) + ? array_merge($_SESSION['__ci_vars'], $new) + : $new; + + return TRUE; } - // Unset each item name - if (count($newdata) > 0) + if ( ! isset($_SESSION[$key])) { - foreach (array_keys($newdata) as $key) - { - unset($this->userdata[$key]); - } + return FALSE; } - // Tell driver data changed - $this->current->sess_save(); + $_SESSION['__ci_vars'][$key] = 'new'; + return TRUE; } // ------------------------------------------------------------------------ /** - * Determine if an item exists + * Get flash keys * - * @param string Item name - * @return bool + * @return array */ - public function has_userdata($item) + public function get_flash_keys() { - return isset($this->userdata[$item]); + if ( ! isset($_SESSION['__ci_vars'])) + { + return array(); + } + + $keys = array(); + foreach (array_keys($_SESSION['__ci_vars']) as $key) + { + is_int($_SESSION['__ci_vars'][$key]) OR $keys[] = $key; + } + + return $keys; } // ------------------------------------------------------------------------ /** - * Add or change flashdata, only available until the next request + * Unmark flash * - * @param mixed Item name or array of items - * @param string Item value or empty string + * @param mixed $key Session data key(s) * @return void */ - public function set_flashdata($newdata, $newval = '') + public function unmark_flash($key) { - // Wrap item as array if singular - if (is_string($newdata)) + if (empty($_SESSION['__ci_vars'])) { - $newdata = array($newdata => $newval); + return; } - // Prepend each key name and set value - if (count($newdata) > 0) + is_array($key) OR $key = array($key); + + foreach ($key as $k) { - foreach ($newdata as $key => $val) + if (isset($_SESSION['__ci_vars'][$k]) && ! is_int($_SESSION['__ci_vars'][$k])) { - $flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_NEW.$key; - $this->set_userdata($flashdata_key, $val); + unset($_SESSION['__ci_vars'][$k]); } } + + if (empty($_SESSION['__ci_vars'])) + { + unset($_SESSION['__ci_vars']); + } } // ------------------------------------------------------------------------ /** - * Keeps existing flashdata available to next request. + * Mark as temp * - * @param mixed Item key(s) - * @return void + * @param mixed $key Session data key(s) + * @param int $ttl Time-to-live in seconds + * @return bool */ - public function keep_flashdata($key) + public function mark_as_temp($key, $ttl = 300) { + $ttl += time(); if (is_array($key)) { - foreach ($key as $k) + $temp = array(); + + foreach ($key as $k => $v) { - $this->keep_flashdata($k); + // Do we have a key => ttl pair, or just a key? + if (is_int($k)) + { + $k = $v; + $v = $ttl; + } + else + { + $v += time(); + } + + if ( ! isset($_SESSION[$k])) + { + return FALSE; + } + + $temp[$k] = $ts; } - return; + $_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars']) + ? array_merge($_SESSION['__ci_vars'], $temp) + : $temp; + + return TRUE; } - // 'old' flashdata gets removed. Here we mark all flashdata as 'new' to preserve it from _flashdata_sweep() - // Note the function will return NULL if the $key provided cannot be found - $old_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key; - $value = $this->userdata($old_flashdata_key); + if ( ! isset($_SESSION[$key])) + { + return FALSE; + } - $new_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_NEW.$key; - $this->set_userdata($new_flashdata_key, $value); + $_SESSION['__ci_vars'][$key] = $ttl; + return TRUE; } // ------------------------------------------------------------------------ /** - * Fetch a specific flashdata item from the session array + * Get temp keys * - * @param string Item key - * @return string + * @return array */ - public function flashdata($key = NULL) + public function get_temp_keys() { - if (isset($key)) + if ( ! isset($_SESSION['__ci_vars'])) { - return $this->userdata(self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key); + return array(); } - // Get our flashdata items from userdata - $out = array(); - foreach ($this->userdata() as $key => $val) + $keys = array(); + foreach (array_keys($_SESSION['__ci_vars']) as $key) { - if (strpos($key, self::FLASHDATA_KEY.self::FLASHDATA_OLD) !== FALSE) - { - $key = str_replace(self::FLASHDATA_KEY.self::FLASHDATA_OLD, '', $key); - $out[$key] = $val; - } + is_int($_SESSION['__ci_vars'][$key]) && $keys[] = $key; } - return $out; + return $keys; } // ------------------------------------------------------------------------ /** - * Add or change tempdata, only available until expiration + * Unmark flash * - * @param mixed Item name or array of items - * @param string Item value or empty string - * @param int Item lifetime in seconds or 0 for default + * @param mixed $key Session data key(s) * @return void */ - public function set_tempdata($newdata, $newval = '', $expire = 0) + public function unmark_temp($key) { - // Set expiration time - $expire = time() + ($expire ? $expire : self::TEMP_EXP_DEF); - - // Wrap item as array if singular - if (is_string($newdata)) + if (empty($_SESSION['__ci_vars'])) { - $newdata = array($newdata => $newval); + return; } - // Get or create expiration list - $expirations = $this->userdata(self::EXPIRATION_KEY); - if ( ! $expirations) - { - $expirations = array(); - } + is_array($key) OR $key = array($key); - // Prepend each key name and set value - if (count($newdata) > 0) + foreach ($key as $k) { - foreach ($newdata as $key => $val) + if (isset($_SESSION['__ci_vars'][$k]) && is_int($_SESSION['__ci_vars'][$k])) { - $tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key; - $expirations[$tempdata_key] = $expire; - $this->set_userdata($tempdata_key, $val); + unset($_SESSION['__ci_vars'][$k]); } } - // Update expiration list - $this->set_userdata(self::EXPIRATION_KEY, $expirations); + if (empty($_SESSION['__ci_vars'])) + { + unset($_SESSION['__ci_vars']); + } } // ------------------------------------------------------------------------ /** - * Delete a temporary session variable from the "userdata" array + * __get() * - * @param mixed Item name or array of item names - * @return void + * @param string $key 'session_id' or a session data key + * @return mixed */ - public function unset_tempdata($newdata) + public function __get($key) { - // Get expirations list - $expirations = $this->userdata(self::EXPIRATION_KEY); - if (empty($expirations)) + // Note: Keep this order the same, just in case somebody wants to + // use 'session_id' as a session data key, for whatever reason + if (isset($_SESSION[$key])) { - // Nothing to do - return; + return $_SESSION[$key]; } - - // Wrap single name as array - if (is_string($newdata)) + elseif ($key === 'session_id') { - $newdata = array($newdata => ''); + return session_id(); } - // Prepend each item name and unset - if (count($newdata) > 0) - { - foreach (array_keys($newdata) as $key) - { - $tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key; - unset($expirations[$tempdata_key]); - $this->unset_userdata($tempdata_key); - } - } - - // Update expiration list - $this->set_userdata(self::EXPIRATION_KEY, $expirations); + return NULL; } // ------------------------------------------------------------------------ /** - * Fetch a specific tempdata item from the session array + * __set() * - * @param string Item key - * @return string + * @param string $key Session data key + * @param mixed $value Session data value + * @return void */ - public function tempdata($key = NULL) + public function __set($key, $value) { - if (isset($key)) - { - return $this->userdata(self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key); - } + $_SESSION[$key] = $value; + } - // Get our tempdata items from userdata - $out = array(); - foreach ($this->userdata() as $key => $val) - { - if (strpos($key, self::FLASHDATA_KEY.self::FLASHDATA_EXP) !== FALSE) - { - $key = str_replace(self::FLASHDATA_KEY.self::FLASHDATA_EXP, '', $key); - $out[$key] = $val; - } - } + // ------------------------------------------------------------------------ - return $out; + /** + * Session destroy + * + * Legacy CI_Session compatibility method + * + * @return void + */ + public function sess_destroy() + { + session_destroy(); } // ------------------------------------------------------------------------ /** - * Identifies flashdata as 'old' for removal - * when _flashdata_sweep() runs. + * Session regenerate * + * Legacy CI_Session compatibility method + * + * @param bool $destroy Destroy old session data flag * @return void */ - protected function _flashdata_mark() + public function sess_regenerate($destroy = FALSE) { - foreach ($this->userdata() as $name => $value) - { - $parts = explode(self::FLASHDATA_NEW, $name); - if (count($parts) === 2) - { - $this->set_userdata(self::FLASHDATA_KEY.self::FLASHDATA_OLD.$parts[1], $value); - $this->unset_userdata($name); - } - } + $_SESSION['__ci_last_regenerate'] = time(); + session_regenerate_id($destroy); } // ------------------------------------------------------------------------ /** - * Removes all flashdata marked as 'old' + * Get userdata reference * - * @return void + * Legacy CI_Session compatibility method + * + * @returns array */ - protected function _flashdata_sweep() + public function &get_userdata() { - $userdata = $this->userdata(); - foreach (array_keys($userdata) as $key) - { - if (strpos($key, self::FLASHDATA_OLD)) - { - $this->unset_userdata($key); - } - } + return $_SESSION; } // ------------------------------------------------------------------------ /** - * Removes all expired tempdata + * Userdata (fetch) * - * @return void + * Legacy CI_Session compatibility method + * + * @param string $key Session data key + * @return mixed Session data value or NULL if not found */ - protected function _tempdata_sweep() + public function userdata($key = NULL) { - // Get expirations list - $expirations = $this->userdata(self::EXPIRATION_KEY); - if (empty($expirations)) + if (isset($key)) { - // Nothing to do - return; + return isset($_SESSION[$key]) ? $_SESSION[$key] : NULL; } + elseif (empty($_SESSION)) + { + return array(); + } + + $userdata = array(); + $_exclude = array_merge( + array('__ci_vars'), + $this->get_flash_keys(), + $this->get_temp_keys() + ); - // Unset expired elements - $now = time(); - $userdata = $this->userdata(); - foreach (array_keys($userdata) as $key) + foreach (array_keys($_SESSION) as $key) { - if (strpos($key, self::FLASHDATA_EXP) && $expirations[$key] < $now) + if ( ! in_array($key, $_exclude, TRUE)) { - unset($expirations[$key]); - $this->unset_userdata($key); + $userdata[$key] = $_SESSION[$key]; } } - // Update expiration list - $this->set_userdata(self::EXPIRATION_KEY, $expirations); + return $userdata; } -} - -// ------------------------------------------------------------------------ - -/** - * CI_Session_driver Class - * - * Extend this class to make a new CI_Session driver. - * A CI_Session driver basically manages an array of name/value pairs with some sort of storage mechanism. - * To make a new driver, derive from (extend) CI_Session_driver. Overload the initialize method and read or create - * session data. Then implement a save handler to write changed data to storage (sess_save), a destroy handler - * to remove deleted data (sess_destroy), and an access handler to expose the data (get_userdata). - * Put your driver in the libraries/Session/drivers folder anywhere in the loader paths. This includes the - * application directory, the system directory, or any path you add with $CI->load->add_package_path(). - * Your driver must be named CI_Session_<name>, and your filename must be Session_<name>.php, - * preferably also capitalized. (e.g.: CI_Session_foo in libraries/Session/drivers/Session_foo.php) - * Then specify the driver by setting 'sess_driver' in your config file or as a parameter when loading the CI_Session - * object. (e.g.: $config['sess_driver'] = 'foo'; OR $CI->load->driver('session', array('sess_driver' => 'foo')); ) - * Already provided are the Native driver, which manages the native PHP $_SESSION array, and - * the Cookie driver, which manages the data in a browser cookie, with optional extra storage in a database table. - * - * @package CodeIgniter - * @subpackage Libraries - * @category Sessions - * @author EllisLab Dev Team - */ -abstract class CI_Session_driver extends CI_Driver { + // ------------------------------------------------------------------------ /** - * CI Singleton + * Set userdata + * + * Legacy CI_Session compatibility method * - * @see get_instance() - * @var object + * @param mixed $data Session data key or an associative array + * @param mixed $value Value to store + * @return void */ - protected $CI; + public function set_userdata($data, $value = NULL) + { + if (is_array($data)) + { + foreach ($data as $key => &$value) + { + $_SESSION[$key] = $value; + } + + return; + } + + $_SESSION[$data] = $value; + } // ------------------------------------------------------------------------ /** - * Constructor + * Unset userdata * - * Gets the CI singleton, so that individual drivers - * don't have to do it separately. + * Legacy CI_Session compatibility method * + * @param mixed $data Session data key(s) * @return void */ - public function __construct() + public function unset_userdata($key) { - $this->CI =& get_instance(); + if (is_array($key)) + { + foreach ($key as $k) + { + unset($_SESSION[$k]); + } + + return; + } + + unset($_SESSION[$key]); } // ------------------------------------------------------------------------ /** - * Decorate + * All userdata (fetch) * - * Decorates the child with the parent driver lib's methods and properties + * Legacy CI_Session compatibility method * - * @param object Parent library object - * @return void + * @return array $_SESSION, excluding flash data items */ - public function decorate($parent) + public function all_userdata() { - // Call base class decorate first - parent::decorate($parent); + return $this->userdata(); + } + + // ------------------------------------------------------------------------ - // Call initialize method now that driver has access to $this->_parent - $this->initialize(); + /** + * Has userdata + * + * Legacy CI_Session compatibility method + * + * @param string $key Session data key + * @return bool + */ + public function has_userdata($key) + { + return isset($_SESSION[$key]); } // ------------------------------------------------------------------------ /** - * __call magic method + * Flashdata (fetch) * - * Handles access to the parent driver library's methods + * Legacy CI_Session compatibility method * - * @param string Library method name - * @param array Method arguments (default: none) - * @return mixed + * @param string $key Session data key + * @return mixed Session data value or NULL if not found */ - public function __call($method, $args = array()) + public function flashdata($key = NULL) { - // Make sure the parent library uses this driver - $this->_parent->select_driver(get_class($this)); - return parent::__call($method, $args); + if (isset($key)) + { + return (isset($_SESSION['__ci_vars'], $_SESSION['__ci_vars'][$key], $_SESSION[$key]) && ! is_int($_SESSION['__ci_vars'][$key])) + ? $_SESSION[$key] + : NULL; + } + + $flashdata = array(); + + if ( ! empty($_SESSION['__ci_vars'])) + { + foreach ($_SESSION['__ci_vars'] as $key => &$value) + { + is_int($value) OR $flashdata[$key] = $_SESSION[$key]; + } + } + + return $flashdata; } // ------------------------------------------------------------------------ /** - * Initialize driver + * Set flashdata + * + * Legacy CI_Session compatibiliy method * + * @param mixed $data Session data key or an associative array + * @param mixed $value Value to store * @return void */ - protected function initialize() + public function set_flashdata($data, $value = NULL) { - // Overload this method to implement initialization + $this->set_userdata($data, $value); + $this->mark_as_flash(is_array($data) ? array_keys($data) : $data); } // ------------------------------------------------------------------------ /** - * Save the session data + * Keep flashdata * - * Data in the array has changed - perform any storage synchronization - * necessary. The child class MUST implement this abstract method! + * Legacy CI_Session compatibility method * + * @param mixed $key Session data key(s) * @return void */ - abstract public function sess_save(); + public function keep_flashdata($key) + { + $this->mark_as_flash($key); + } // ------------------------------------------------------------------------ /** - * Destroy the current session + * Temp data (fetch) * - * Clean up storage for this session - it has been terminated. - * The child class MUST implement this abstract method! + * Legacy CI_Session compatibility method * - * @return void + * @param string $key Session data key + * @return mixed Session data value or NULL if not found */ - abstract public function sess_destroy(); + public function tempdata($key = NULL) + { + if (isset($key)) + { + return (isset($_SESSION['__ci_vars'], $_SESSION['__ci_vars'][$key], $_SESSION[$key]) && is_int($_SESSION['__ci_vars'][$key])) + ? $_SESSION[$key] + : NULL; + } + + $tempdata = array(); + + if ( ! empty($_SESSION['__ci_vars'])) + { + foreach ($_SESSION['__ci_vars'] as $key => &$value) + { + is_int($value) && $tempdata[$key] = $_SESSION[$key]; + } + } + + return $tempdata; + } // ------------------------------------------------------------------------ /** - * Regenerate the current session + * Set tempdata * - * Regenerate the session ID. - * The child class MUST implement this abstract method! + * Legacy CI_Session compatibility method * - * @param bool Destroy session data flag (default: false) + * @param mixed $data Session data key or an associative array of items + * @param mixed $value Value to store + * @param int $ttl Time-to-live in seconds * @return void */ - abstract public function sess_regenerate($destroy = FALSE); + public function set_tempdata($data, $value = NULL, $ttl = 300) + { + $this->set_userdata($data, $value); + $this->mark_as_temp($data, $ttl); + } // ------------------------------------------------------------------------ /** - * Get a reference to user data array + * Unset tempdata * - * Give array access to the main CI_Session object. - * The child class MUST implement this abstract method! + * Legacy CI_Session compatibility method * - * @return array Reference to userdata + * @param mixed $data Session data key(s) + * @return void */ - abstract public function &get_userdata(); + public function unset_tempdata($key) + { + $this->unmark_temp($key); + } } diff --git a/system/libraries/Session/SessionHandlerInterface.php b/system/libraries/Session/SessionHandlerInterface.php new file mode 100644 index 000000000..06f252d7e --- /dev/null +++ b/system/libraries/Session/SessionHandlerInterface.php @@ -0,0 +1,62 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link http://codeigniter.com + * @since Version 3.0.0 + * @filesource + */ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * SessionHandlerInterface + * + * PHP 5.4 compatibility interface + * + * @package CodeIgniter + * @subpackage Libraries + * @category Sessions + * @author Andrey Andreev + * @link http://codeigniter.com/user_guide/libraries/sessions.html + */ +interface SessionHandlerInterface { + + public function open($save_path, $name); + public function close(); + public function read($session_id); + public function write($session_id, $session_data); + public function destroy($session_id); + public function gc($maxlifetime); +} + +/* End of file SessionHandlerInterface.php */ +/* Location: ./system/libraries/Session/SessionHandlerInterface.php */
\ No newline at end of file diff --git a/system/libraries/Session/Session_driver.php b/system/libraries/Session/Session_driver.php new file mode 100644 index 000000000..0eca83905 --- /dev/null +++ b/system/libraries/Session/Session_driver.php @@ -0,0 +1,163 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link http://codeigniter.com + * @since Version 3.0.0 + * @filesource + */ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * CodeIgniter Session Driver Class + * + * @package CodeIgniter + * @subpackage Libraries + * @category Sessions + * @author Andrey Andreev + * @link http://codeigniter.com/user_guide/libraries/sessions.html + */ +abstract class CI_Session_driver implements SessionHandlerInterface { + + protected $_config; + + /** + * Data fingerprint + * + * @var bool + */ + protected $_fingerprint; + + /** + * Lock placeholder + * + * @var mixed + */ + protected $_lock = FALSE; + + /** + * Read session ID + * + * Used to detect session_regenerate_id() calls because PHP only calls + * write() after regenerating the ID. + * + * @var string + */ + protected $_session_id; + + // ------------------------------------------------------------------------ + + /** + * Class constructor + * + * @param array $params Configuration parameters + * @return void + */ + public function __construct(&$params) + { + $this->_config =& $params; + } + + // ------------------------------------------------------------------------ + + protected function _cookie_destroy() + { + return setcookie( + $this->_config['cookie_name'], + NULL, + 1, + $this->_config['cookie_path'], + $this->_config['cookie_domain'], + $this->_config['cookie_secure'], + TRUE + ); + } + + // ------------------------------------------------------------------------ + + /** + * Get lock + * + * A default locking mechanism via semaphores, if ext/sysvsem is available. + * + * Drivers will usually override this and only fallback to it if no other + * locking mechanism is available. + * + * @param string $session_id + * @return bool + */ + protected function _get_lock($session_id) + { + if ( ! extension_loaded('sysvsem')) + { + $this->_lock = TRUE; + return TRUE; + } + + if (($this->_lock = sem_get($session_id.($this->_config['match_ip'] ? '_'.$_SERVER['REMOTE_ADDR'] : ''), 1, 0644)) === FALSE) + { + return FALSE; + } + + if ( ! sem_acquire($this->_lock)) + { + sem_remove($this->_lock); + $this->_lock = FALSE; + return FALSE; + } + + return TRUE; + } + + // ------------------------------------------------------------------------ + + /** + * Release lock + * + * @return bool + */ + protected function _release_lock() + { + if (extension_loaded('sysvsem') && $this->_lock) + { + sem_release($this->_lock); + sem_remove($this->_lock); + $this->_lock = FALSE; + } + + return TRUE; + } + +} + +/* End of file Session_driver.php */ +/* Location: ./system/libraries/Session/Session_driver.php */
\ No newline at end of file diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php deleted file mode 100644 index c0e62affa..000000000 --- a/system/libraries/Session/drivers/Session_cookie.php +++ /dev/null @@ -1,816 +0,0 @@ -<?php -/** - * CodeIgniter - * - * An open source application development framework for PHP - * - * This content is released under the MIT License (MIT) - * - * Copyright (c) 2014 - 2015, British Columbia Institute of Technology - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - * - * @package CodeIgniter - * @author EllisLab Dev Team - * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) - * @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/) - * @license http://opensource.org/licenses/MIT MIT License - * @link http://codeigniter.com - * @since Version 1.0.0 - * @filesource - */ -defined('BASEPATH') OR exit('No direct script access allowed'); - -/** - * Cookie-based session management driver - * - * This is the classic CI_Session functionality, as written by EllisLab, abstracted out to a driver. - * - * @package CodeIgniter - * @subpackage Libraries - * @category Sessions - * @author EllisLab Dev Team - * @link http://codeigniter.com/user_guide/libraries/sessions.html - */ -class CI_Session_cookie extends CI_Session_driver { - - /** - * Whether to encrypt the session cookie - * - * @var bool - */ - public $sess_encrypt_cookie = FALSE; - - /** - * Whether to use to the database for session storage - * - * @var bool - */ - public $sess_use_database = FALSE; - - /** - * Name of the database table in which to store sessions - * - * @var string - */ - public $sess_table_name = ''; - - /** - * Length of time (in seconds) for sessions to expire - * - * @var int - */ - public $sess_expiration = 7200; - - /** - * Whether to kill session on close of browser window - * - * @var bool - */ - public $sess_expire_on_close = FALSE; - - /** - * Whether to match session on ip address - * - * @var bool - */ - public $sess_match_ip = FALSE; - - /** - * Whether to match session on user-agent - * - * @var bool - */ - public $sess_match_useragent = TRUE; - - /** - * Name of session cookie - * - * @var string - */ - public $sess_cookie_name = 'ci_session'; - - /** - * Session cookie prefix - * - * @var string - */ - public $cookie_prefix = ''; - - /** - * Session cookie path - * - * @var string - */ - public $cookie_path = ''; - - /** - * Session cookie domain - * - * @var string - */ - public $cookie_domain = ''; - - /** - * Whether to set the cookie only on HTTPS connections - * - * @var bool - */ - public $cookie_secure = FALSE; - - /** - * Whether cookie should be allowed only to be sent by the server - * - * @var bool - */ - public $cookie_httponly = FALSE; - - /** - * Interval at which to update session - * - * @var int - */ - public $sess_time_to_update = 300; - - /** - * Key with which to encrypt the session cookie - * - * @var string - */ - public $encryption_key = ''; - - /** - * Timezone to use for the current time - * - * @var string - */ - public $time_reference = 'local'; - - /** - * Session data - * - * @var array - */ - public $userdata = array(); - - /** - * Current time - * - * @var int - */ - public $now; - - // ------------------------------------------------------------------------ - - /** - * Default userdata keys - * - * @var array - */ - protected $defaults = array( - 'session_id' => NULL, - 'ip_address' => NULL, - 'user_agent' => NULL, - 'last_activity' => NULL - ); - - /** - * Data needs DB update flag - * - * @var bool - */ - protected $data_dirty = FALSE; - - /** - * Standardize newlines flag - * - * @var bool - */ - protected $_standardize_newlines; - - // ------------------------------------------------------------------------ - - /** - * Initialize session driver object - * - * @return void - */ - protected function initialize() - { - // Set all the session preferences, which can either be set - // manually via the $params array or via the config file - $prefs = array( - 'sess_encrypt_cookie', - 'sess_use_database', - 'sess_table_name', - 'sess_expiration', - 'sess_expire_on_close', - 'sess_match_ip', - 'sess_match_useragent', - 'sess_cookie_name', - 'cookie_path', - 'cookie_domain', - 'cookie_secure', - 'cookie_httponly', - 'sess_time_to_update', - 'time_reference', - 'cookie_prefix', - 'encryption_key', - ); - - $this->_standardize_newlines = (bool) config_item('standardize_newlines'); - - foreach ($prefs as $key) - { - $this->$key = isset($this->_parent->params[$key]) - ? $this->_parent->params[$key] - : $this->CI->config->item($key); - } - - if (empty($this->encryption_key)) - { - show_error('In order to use the Cookie Session driver you are required to set an encryption key in your config file.'); - } - - // Do we need encryption? If so, load the encryption class - if ($this->sess_encrypt_cookie === TRUE) - { - $this->CI->load->library('encryption'); - } - - // Check for database - if ($this->sess_use_database === TRUE && $this->sess_table_name !== '') - { - // Load database driver - $this->CI->load->database(); - - // Register shutdown function - register_shutdown_function(array($this, '_update_db')); - } - - // Set the "now" time. Can either be GMT or server time, based on the config prefs. - // We use this to set the "last activity" time - $this->now = $this->_get_time(); - - // Set the session length. If the session expiration is - // set to zero we'll set the expiration two years from now. - if ($this->sess_expiration === 0) - { - $this->sess_expiration = (60*60*24*365*2); - } - - // Set the cookie name - $this->sess_cookie_name = $this->cookie_prefix.$this->sess_cookie_name; - - // Run the Session routine. If a session doesn't exist we'll - // create a new one. If it does, we'll update it. - if ( ! $this->_sess_read()) - { - $this->_sess_create(); - } - else - { - $this->_sess_update(); - } - - // Delete expired sessions if necessary - $this->_sess_gc(); - } - - // ------------------------------------------------------------------------ - - /** - * Write the session data - * - * @return void - */ - public function sess_save() - { - // Check for database - if ($this->sess_use_database === TRUE) - { - // Mark custom data as dirty so we know to update the DB - $this->data_dirty = TRUE; - } - - // Write the cookie - $this->_set_cookie(); - } - - // ------------------------------------------------------------------------ - - /** - * Destroy the current session - * - * @return void - */ - public function sess_destroy() - { - // Kill the session DB row - if ($this->sess_use_database === TRUE && isset($this->userdata['session_id'])) - { - $this->CI->db->delete($this->sess_table_name, array('session_id' => $this->userdata['session_id'])); - $this->data_dirty = FALSE; - } - - // Kill the cookie - $this->_setcookie($this->sess_cookie_name, '', ($this->now - 31500000), - $this->cookie_path, $this->cookie_domain, 0); - - // Kill session data - $this->userdata = array(); - } - - // ------------------------------------------------------------------------ - - /** - * Regenerate the current session - * - * Regenerate the session id - * - * @param bool Destroy session data flag (default: false) - * @return void - */ - public function sess_regenerate($destroy = FALSE) - { - // Check destroy flag - if ($destroy) - { - // Destroy old session and create new one - $this->sess_destroy(); - $this->_sess_create(); - } - else - { - // Just force an update to recreate the id - $this->_sess_update(TRUE); - } - } - - // ------------------------------------------------------------------------ - - /** - * Get a reference to user data array - * - * @return array Reference to userdata - */ - public function &get_userdata() - { - return $this->userdata; - } - - // ------------------------------------------------------------------------ - - /** - * Fetch the current session data if it exists - * - * @return bool - */ - protected function _sess_read() - { - // Fetch the cookie - $session = $this->CI->input->cookie($this->sess_cookie_name); - - // No cookie? Goodbye cruel world!... - if ($session === NULL) - { - log_message('debug', 'A session cookie was not found.'); - return FALSE; - } - - if ($this->sess_encrypt_cookie === TRUE) - { - $session = $this->CI->encryption->decrypt($session); - if ($session === FALSE) - { - log_message('error', 'Session: Unable to decrypt the session cookie, possibly due to a HMAC mismatch.'); - return FALSE; - } - } - else - { - if (($len = strlen($session) - 40) <= 0) - { - log_message('error', 'Session: The session cookie was not signed.'); - return FALSE; - } - - // Check cookie authentication - $hmac = substr($session, $len); - $session = substr($session, 0, $len); - - // Time-attack-safe comparison - $hmac_check = hash_hmac('sha1', $session, $this->encryption_key); - $diff = 0; - for ($i = 0; $i < 40; $i++) - { - $diff |= ord($hmac[$i]) ^ ord($hmac_check[$i]); - } - - if ($diff !== 0) - { - log_message('error', 'Session: HMAC mismatch. The session cookie data did not match what was expected.'); - $this->sess_destroy(); - return FALSE; - } - } - - // Unserialize the session array - $session = @unserialize($session); - - // Is the session data we unserialized an array with the correct format? - if ( ! is_array($session) OR ! isset($session['session_id'], $session['ip_address'], $session['user_agent'], $session['last_activity'])) - { - log_message('debug', 'Session: Wrong cookie data format'); - $this->sess_destroy(); - return FALSE; - } - - // Is the session current? - if (($session['last_activity'] + $this->sess_expiration) < $this->now OR $session['last_activity'] > $this->now) - { - log_message('debug', 'Session: Expired'); - $this->sess_destroy(); - return FALSE; - } - - // Does the IP match? - if ($this->sess_match_ip === TRUE && $session['ip_address'] !== $this->CI->input->ip_address()) - { - log_message('debug', 'Session: IP address mismatch'); - $this->sess_destroy(); - return FALSE; - } - - // Does the User Agent Match? - if ($this->sess_match_useragent === TRUE && - trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120))) - { - log_message('debug', 'Session: User Agent string mismatch'); - $this->sess_destroy(); - return FALSE; - } - - // Is there a corresponding session in the DB? - if ($this->sess_use_database === TRUE) - { - $this->CI->db->where('session_id', $session['session_id']); - - if ($this->sess_match_ip === TRUE) - { - $this->CI->db->where('ip_address', $session['ip_address']); - } - - if ($this->sess_match_useragent === TRUE) - { - $this->CI->db->where('user_agent', $session['user_agent']); - } - - // Is caching in effect? Turn it off - $db_cache = $this->CI->db->cache_on; - $this->CI->db->cache_off(); - - $query = $this->CI->db->get($this->sess_table_name); - - // Was caching in effect? - if ($db_cache) - { - // Turn it back on - $this->CI->db->cache_on(); - } - - // No result? Kill it! - if (empty($query) OR $query->num_rows() === 0) - { - log_message('debug', 'Session: No match found in our database'); - $this->sess_destroy(); - return FALSE; - } - - // Is there custom data? If so, add it to the main session array - $row = $query->row(); - if ( ! empty($row->user_data)) - { - $custom_data = unserialize(trim($row->user_data)); - - if (is_array($custom_data)) - { - $session = $session + $custom_data; - } - } - } - - // Session is valid! - $this->userdata = $session; - return TRUE; - } - - // ------------------------------------------------------------------------ - - /** - * Create a new session - * - * @return void - */ - protected function _sess_create() - { - // Initialize userdata - $this->userdata = array( - 'session_id' => $this->_make_sess_id(), - 'ip_address' => $this->CI->input->ip_address(), - 'user_agent' => trim(substr($this->CI->input->user_agent(), 0, 120)), - 'last_activity' => $this->now, - ); - - log_message('debug', 'Session: Creating new session ('.$this->userdata['session_id'].')'); - - // Check for database - if ($this->sess_use_database === TRUE) - { - // Add empty user_data field and save the data to the DB - $this->CI->db->set('user_data', '')->insert($this->sess_table_name, $this->userdata); - } - - // Write the cookie - $this->_set_cookie(); - } - - // ------------------------------------------------------------------------ - - /** - * Update an existing session - * - * @param bool Force update flag (default: false) - * @return void - */ - protected function _sess_update($force = FALSE) - { - // We only update the session every five minutes by default (unless forced) - if ( ! $force && ($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now) - { - return; - } - - // Update last activity to now - $this->userdata['last_activity'] = $this->now; - - // Save the old session id so we know which DB record to update - $old_sessid = $this->userdata['session_id']; - - // Changing the session ID during an AJAX call causes problems - if ( ! $this->CI->input->is_ajax_request()) - { - // Get new id - $this->userdata['session_id'] = $this->_make_sess_id(); - - log_message('debug', 'Session: Regenerate ID'); - } - - // Check for database - if ($this->sess_use_database === TRUE) - { - $this->CI->db->where('session_id', $old_sessid); - - if ($this->sess_match_ip === TRUE) - { - $this->CI->db->where('ip_address', $this->CI->input->ip_address()); - } - - if ($this->sess_match_useragent === TRUE) - { - $this->CI->db->where('user_agent', trim(substr($this->CI->input->user_agent(), 0, 120))); - } - - // Update the session ID and last_activity field in the DB - $this->CI->db->update($this->sess_table_name, - array( - 'last_activity' => $this->now, - 'session_id' => $this->userdata['session_id'] - ) - ); - } - - // Write the cookie - $this->_set_cookie(); - } - - // ------------------------------------------------------------------------ - - /** - * Update database with current data - * - * This gets called from the shutdown function and also - * registered with PHP to run at the end of the request - * so it's guaranteed to update even when a fatal error - * occurs. The first call makes the update and clears the - * dirty flag so it won't happen twice. - * - * @return void - */ - public function _update_db() - { - // Check for database and dirty flag and unsaved - if ($this->sess_use_database === TRUE && $this->data_dirty === TRUE) - { - // Set up activity and data fields to be set - // If we don't find custom data, user_data will remain an empty string - $set = array( - 'last_activity' => $this->userdata['last_activity'], - 'user_data' => '' - ); - - // Get the custom userdata, leaving out the defaults - // (which get stored in the cookie) - $userdata = array_diff_key($this->userdata, $this->defaults); - - // Did we find any custom data? - if ( ! empty($userdata)) - { - // Serialize the custom data array so we can store it - $set['user_data'] = serialize($userdata); - } - - // Reset query builder values. - $this->CI->db->reset_query(); - - // Run the update query - // Any time we change the session id, it gets updated immediately, - // so our where clause below is always safe - $this->CI->db->where('session_id', $this->userdata['session_id']); - - if ($this->sess_match_ip === TRUE) - { - $this->CI->db->where('ip_address', $this->CI->input->ip_address()); - } - - if ($this->sess_match_useragent === TRUE) - { - $this->CI->db->where('user_agent', trim(substr($this->CI->input->user_agent(), 0, 120))); - } - - $this->CI->db->update($this->sess_table_name, $set); - - // Clear dirty flag to prevent double updates - $this->data_dirty = FALSE; - - log_message('debug', 'CI_Session Data Saved To DB'); - } - } - - // ------------------------------------------------------------------------ - - /** - * Generate a new session id - * - * @return string Hashed session id - */ - protected function _make_sess_id() - { - $new_sessid = ''; - do - { - $new_sessid .= mt_rand(); - } - while (strlen($new_sessid) < 32); - - // To make the session ID even more secure we'll combine it with the user's IP - $new_sessid .= $this->CI->input->ip_address(); - - // Turn it into a hash and return - return md5(uniqid($new_sessid, TRUE)); - } - - // ------------------------------------------------------------------------ - - /** - * Get the "now" time - * - * @return int Time - */ - protected function _get_time() - { - if ($this->time_reference === 'local' OR $this->time_reference === date_default_timezone_get()) - { - return time(); - } - - $datetime = new DateTime('now', new DateTimeZone($this->time_reference)); - sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second); - - return mktime($hour, $minute, $second, $month, $day, $year); - } - - // ------------------------------------------------------------------------ - - /** - * Write the session cookie - * - * @return void - */ - protected function _set_cookie() - { - // Get userdata (only defaults if database) - $cookie_data = ($this->sess_use_database === TRUE) - ? array_intersect_key($this->userdata, $this->defaults) - : $this->userdata; - - // The Input class will do this and since we use HMAC verification, - // unless we standardize here as well, the hash won't match. - if ($this->_standardize_newlines) - { - foreach (array_keys($this->userdata) as $key) - { - $this->userdata[$key] = preg_replace('/(?:\r\n|[\r\n])/', PHP_EOL, $this->userdata[$key]); - } - } - - // Serialize the userdata for the cookie - $cookie_data = serialize($cookie_data); - - if ($this->sess_encrypt_cookie === TRUE) - { - $cookie_data = $this->CI->encryption->encrypt($cookie_data); - } - else - { - // Require message authentication - $cookie_data .= hash_hmac('sha1', $cookie_data, $this->encryption_key); - } - - $expire = ($this->sess_expire_on_close === TRUE) ? 0 : $this->sess_expiration + time(); - - // Set the cookie - $this->_setcookie($this->sess_cookie_name, $cookie_data, $expire, $this->cookie_path, $this->cookie_domain, - $this->cookie_secure, $this->cookie_httponly); - } - - // ------------------------------------------------------------------------ - - /** - * Set a cookie with the system - * - * This abstraction of the setcookie call allows overriding for unit testing - * - * @param string Cookie name - * @param string Cookie value - * @param int Expiration time - * @param string Cookie path - * @param string Cookie domain - * @param bool Secure connection flag - * @param bool HTTP protocol only flag - * @return void - */ - protected function _setcookie($name, $value = '', $expire = 0, $path = '', $domain = '', $secure = FALSE, $httponly = FALSE) - { - setcookie($name, $value, $expire, $path, $domain, $secure, $httponly); - } - - // ------------------------------------------------------------------------ - - /** - * Garbage collection - * - * This deletes expired session rows from database - * if the probability percentage is met - * - * @return void - */ - protected function _sess_gc() - { - if ($this->sess_use_database !== TRUE) - { - return; - } - - $probability = ini_get('session.gc_probability'); - $divisor = ini_get('session.gc_divisor'); - - if (mt_rand(1, $divisor) <= $probability) - { - $expire = $this->now - $this->sess_expiration; - $this->CI->db->delete($this->sess_table_name, 'last_activity < '.$expire); - - log_message('debug', 'Session garbage collection performed.'); - } - } - -} - -/* End of file Session_cookie.php */ -/* Location: ./system/libraries/Session/drivers/Session_cookie.php */
\ No newline at end of file diff --git a/system/libraries/Session/drivers/Session_database_driver.php b/system/libraries/Session/drivers/Session_database_driver.php new file mode 100644 index 000000000..a6c411b34 --- /dev/null +++ b/system/libraries/Session/drivers/Session_database_driver.php @@ -0,0 +1,303 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link http://codeigniter.com + * @since Version 3.0.0 + * @filesource + */ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * CodeIgniter Session Database Driver + * + * @package CodeIgniter + * @subpackage Libraries + * @category Sessions + * @author Andrey Andreev + * @link http://codeigniter.com/user_guide/libraries/sessions.html + */ +class CI_Session_database_driver extends CI_Session_driver implements SessionHandlerInterface { + + /** + * DB object + * + * @var object + */ + protected $_db; + + /** + * Row exists flag + * + * @var bool + */ + protected $_row_exists = FALSE; + + /** + * Lock "driver" flag + * + * @var string + */ + protected $_lock_driver = 'semaphore'; + + // ------------------------------------------------------------------------ + + /** + * Class constructor + * + * @param array $params Configuration parameters + * @return void + */ + public function __construct(&$params) + { + parent::__construct($params); + + $CI =& get_instance(); + isset($CI->db) OR $CI->load->database(); + $this->_db =& $CI->db; + + if ( ! $this->_db instanceof CI_DB_query_builder) + { + throw new Exception('Query Builder not enabled for the configured database. Aborting.'); + } + elseif ($this->_db->pconnect) + { + throw new Exception('Configured database connection is persistent. Aborting.'); + } + + $db_driver = $this->_db->dbdriver.(empty($this->_db->subdriver) ? '' : '_'.$this->_db->subdriver); + if (strpos($db_driver, 'mysql') !== FALSE) + { + $this->_lock_driver = 'mysql'; + } + elseif (in_array($db_driver, array('postgre', 'pdo_pgsql'), TRUE)) + { + $this->_lock_driver = 'postgre'; + } + + isset($this->_config['save_path']) OR $this->_config['save_path'] = config_item('sess_table_name'); + } + + // ------------------------------------------------------------------------ + + public function open($save_path, $name) + { + return empty($this->_db->conn_id) + ? ( ! $this->_db->autoinit && $this->_db->db_connect()) + : TRUE; + } + + // ------------------------------------------------------------------------ + + public function read($session_id) + { + if ($this->_get_lock($session_id) !== FALSE) + { + // Needed by write() to detect session_regenerate_id() calls + $this->_session_id = $session_id; + + $this->_db + ->select('data') + ->from($this->_config['save_path']) + ->where('id', $session_id); + + if ($this->_config['match_ip']) + { + $this->_db->where('ip_address', $_SERVER['REMOTE_ADDR']); + } + + if (($result = $this->_db->get()->row()) === NULL) + { + $this->_fingerprint = md5(''); + return ''; + } + + $this->_fingerprint = md5(rtrim($result->data)); + $this->_row_exists = TRUE; + return $result->data; + } + + $this->_fingerprint = md5(''); + return ''; + } + + public function write($session_id, $session_data) + { + // Was the ID regenerated? + if ($session_id !== $this->_session_id) + { + if ( ! $this->_release_lock() OR ! $this->_get_lock($session_id)) + { + return FALSE; + } + + $this->_row_exists = FALSE; + $this->_session_id = $session_id; + } + elseif ($this->_lock === FALSE) + { + return FALSE; + } + + if ($this->_row_exists === FALSE) + { + if ($this->_db->insert($this->_config['save_path'], array('id' => $session_id, 'ip_address' => $_SERVER['REMOTE_ADDR'], 'timestamp' => time(), 'data' => $session_data))) + { + $this->_fingerprint = md5($session_data); + return $this->_row_exists = TRUE; + } + + return FALSE; + } + + $this->_db->where('id', $session_id); + if ($this->_config['match_ip']) + { + $this->_db->where('ip_address', $_SERVER['REMOTE_ADDR']); + } + + $update_data = ($this->_fingerprint === md5($session_data)) + ? array('timestamp' => time()) + : array('timestamp' => time(), 'data' => $session_data); + + if ($this->_db->update($this->_config['save_path'], $update_data)) + { + $this->_fingerprint = md5($session_data); + return TRUE; + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function close() + { + return ($this->_lock) + ? $this->_release_lock() + : TRUE; + } + + // ------------------------------------------------------------------------ + + public function destroy($session_id) + { + if ($this->_lock) + { + $this->_db->where('id', $session_id); + if ($this->_config['match_ip']) + { + $this->_db->where('ip_address', $_SERVER['REMOTE_ADDR']); + } + + return $this->_db->delete($this->_config['save_path']) + ? ($this->close() && $this->_cookie_destroy()) + : FALSE; + } + + return ($this->close() && $this->_cookie_destroy()); + } + + // ------------------------------------------------------------------------ + + public function gc($maxlifetime) + { + return $this->_db->delete($this->_config['save_path'], 'timestamp < '.(time() - $maxlifetime)); + } + + // ------------------------------------------------------------------------ + + protected function _get_lock($session_id) + { + if ($this->_lock_driver === 'mysql') + { + $arg = $session_id.($this->_config['match_ip'] ? '_'.$_SERVER['REMOTE_ADDR'] : ''); + if ($this->_db->query("SELECT GET_LOCK('".$arg."', 10) AS ci_session_lock")->row()->ci_session_lock) + { + $this->_lock = $arg; + return TRUE; + } + + return FALSE; + } + elseif ($this->_lock_driver === 'postgre') + { + $arg = "hashtext('".$session_id."')".($this->_config['match_ip'] ? ", hashtext('".$_SERVER['REMOTE_ADDR']."')" : ''); + if ($this->_db->simple_query('SELECT pg_advisory_lock('.$arg.')')) + { + $this->_lock = $arg; + return TRUE; + } + + return FALSE; + } + + return parent::_get_lock($session_id); + } + + // ------------------------------------------------------------------------ + + protected function _release_lock() + { + if ( ! $this->_lock) + { + return TRUE; + } + + if ($this->_lock_driver === 'mysql') + { + if ($this->_db->query("SELECT RELEASE_LOCK('".$this->_lock."') AS ci_session_lock")->row()->ci_session_lock) + { + $this->_lock = FALSE; + return TRUE; + } + + return FALSE; + } + elseif ($this->_lock_driver === 'postgre') + { + if ($this->_db->simple_query('SELECT pg_advisory_unlock('.$this->_lock.')')) + { + $this->_lock = FALSE; + return TRUE; + } + + return FALSE; + } + + return parent::_release_lock(); + } + +} + +/* End of file Session_database_driver.php */ +/* Location: ./system/libraries/Session/drivers/Session_database_driver.php */
\ No newline at end of file diff --git a/system/libraries/Session/drivers/Session_files_driver.php b/system/libraries/Session/drivers/Session_files_driver.php new file mode 100644 index 000000000..b82d9f55d --- /dev/null +++ b/system/libraries/Session/drivers/Session_files_driver.php @@ -0,0 +1,298 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link http://codeigniter.com + * @since Version 3.0.0 + * @filesource +*/ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * CodeIgniter Session Files Driver + * + * @package CodeIgniter + * @subpackage Libraries + * @category Sessions + * @author Andrey Andreev + * @link http://codeigniter.com/user_guide/libraries/sessions.html + */ +class CI_Session_files_driver extends CI_Session_driver implements SessionHandlerInterface { + + /** + * Save path + * + * @var string + */ + protected $_save_path; + + /** + * File handle + * + * @var resource + */ + protected $_file_handle; + + /** + * File name + * + * @var resource + */ + protected $_file_path; + + /** + * File new flag + * + * @var bool + */ + protected $_file_new; + + // ------------------------------------------------------------------------ + + /** + * Class constructor + * + * @param array $params Configuration parameters + * @return void + */ + public function __construct(&$params) + { + parent::__construct($params); + + if (isset($this->_config['save_path'])) + { + $this->_config['save_path'] = rtrim($this->_config['save_path'], '/\\'); + ini_set('session.save_path', $this->_config['save_path']); + } + else + { + $this->_config['save_path'] = rtrim(ini_get('session.save_path'), '/\\'); + } + } + + // ------------------------------------------------------------------------ + + public function open($save_path, $name) + { + if ( ! is_dir($save_path) && ! mkdir($save_path, 0700, TRUE)) + { + log_message('error', "Session: Configured save path '".$this->_config['save_path']."' is not a directory, doesn't exist or cannot be created."); + return FALSE; + } + + $this->_config['save_path'] = $save_path; + $this->_file_path = $this->_config['save_path'].DIRECTORY_SEPARATOR + .$name // we'll use the session cookie name as a prefix to avoid collisions + .($this->_config['match_ip'] ? md5($_SERVER['REMOTE_ADDR']) : ''); + + return TRUE; + } + + // ------------------------------------------------------------------------ + + public function read($session_id) + { + // This might seem weird, but PHP 5.6 introduces session_reset(), + // which re-reads session data + if ($this->_file_handle === NULL) + { + // Just using fopen() with 'c+b' mode would be perfect, but it is only + // available since PHP 5.2.6 and we have to set permissions for new files, + // so we'd have to hack around this ... + if (($this->_file_new = ! file_exists($this->_file_path.$session_id)) === TRUE) + { + if (($this->_file_handle = fopen($this->_file_path.$session_id, 'w+b')) === FALSE) + { + log_message('error', "Session: File '".$this->_file_path.$session_id."' doesn't exist and cannot be created."); + return FALSE; + } + } + elseif (($this->_file_handle = fopen($this->_file_path.$session_id, 'r+b')) === FALSE) + { + log_message('error', "Session: Unable to open file '".$this->_file_path.$session_id."'."); + return FALSE; + } + + if (flock($this->_file_handle, LOCK_EX) === FALSE) + { + log_message('error', "Session: Unable to obtain lock for file '".$this->_file_path.$session_id."'."); + fclose($this->_file_handle); + $this->_file_handle = NULL; + return FALSE; + } + + // Needed by write() to detect session_regenerate_id() calls + $this->_session_id = $session_id; + + if ($this->_file_new) + { + chmod($this->_file_path.$session_id, 0600); + $this->_fingerprint = md5(''); + return ''; + } + } + else + { + rewind($this->_file_handle); + } + + $session_data = ''; + for ($read = 0, $length = filesize($this->_file_path.$session_id); $read < $length; $read += strlen($buffer)) + { + if (($buffer = fread($this->_file_handle, $length - $read)) === FALSE) + { + break; + } + + $session_data .= $buffer; + } + + $this->_fingerprint = md5($session_data); + return $session_data; + } + + public function write($session_id, $session_data) + { + // If the two IDs don't match, we have a session_regenerate_id() call + // and we need to close the old handle and open a new one + if ($session_id !== $this->_session_id && ( ! $this->close() OR $this->read($session_id) === FALSE)) + { + return FALSE; + } + + if ( ! is_resource($this->_file_handle)) + { + return FALSE; + } + elseif ($this->_fingerprint === md5($session_data)) + { + return ($this->_file_new) + ? TRUE + : touch($this->_file_path.$session_id); + } + + if ( ! $this->_file_new) + { + ftruncate($this->_file_handle, 0); + rewind($this->_file_handle); + } + + if (($length = strlen($session_data)) > 0) + { + for ($written = 0; $written < $length; $written += $result) + { + if (($result = fwrite($this->_file_handle, substr($session_data, $written))) === FALSE) + { + break; + } + } + + if ( ! is_int($result)) + { + $this->_fingerprint = md5(substr($session_data, 0, $written)); + log_message('error', 'Session: Unable to write data.'); + return FALSE; + } + } + + $this->_fingerprint = md5($session_data); + return TRUE; + } + + // ------------------------------------------------------------------------ + + public function close() + { + if (is_resource($this->_file_handle)) + { + flock($this->_file_handle, LOCK_UN); + fclose($this->_file_handle); + + $this->_file_handle = $this->_file_new = $this->_session_id = NULL; + return TRUE; + } + + return TRUE; + } + + // ------------------------------------------------------------------------ + + public function destroy($session_id) + { + if ($this->close()) + { + return unlink($this->_file_path.$session_id) && $this->_cookie_destroy(); + } + elseif ($this->_file_path !== NULL) + { + clearstatcache(); + return file_exists($this->_file_path.$session_id) + ? (unlink($this->_file_path.$session_id) && $this->_cookie_destroy()) + : TRUE; + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function gc($maxlifetime) + { + if ( ! is_dir($this->_config['save_path']) OR ($files = scandir($this->_config['save_path'])) === FALSE) + { + log_message('debug', "Session: Garbage collector couldn't list files under directory '".$this->_config['save_path']."'."); + return FALSE; + } + + $ts = time() - $maxlifetime; + + foreach ($files as $file) + { + // If the filename doesn't match this pattern, it's either not a session file or is not ours + if ( ! preg_match('/(?:[0-9a-f]{32})?[0-9a-f]{40}$/i', $file) + OR ! is_file($this->_config['save_path'].DIRECTORY_SEPARATOR.$file) + OR ($mtime = filemtime($this->_config['save_path'].DIRECTORY_SEPARATOR.$file)) === FALSE + OR $mtime > $ts) + { + continue; + } + + unlink($this->_config['save_path'].DIRECTORY_SEPARATOR.$file); + } + + return TRUE; + } + +} + +/* End of file Session_files_driver.php */ +/* Location: ./system/libraries/Session/drivers/Session_files_driver.php */
\ No newline at end of file diff --git a/system/libraries/Session/drivers/Session_memcached_driver.php b/system/libraries/Session/drivers/Session_memcached_driver.php new file mode 100644 index 000000000..3da7ddd6d --- /dev/null +++ b/system/libraries/Session/drivers/Session_memcached_driver.php @@ -0,0 +1,312 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link http://codeigniter.com + * @since Version 3.0.0 + * @filesource + */ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * CodeIgniter Session Memcached Driver + * + * @package CodeIgniter + * @subpackage Libraries + * @category Sessions + * @author Andrey Andreev + * @link http://codeigniter.com/user_guide/libraries/sessions.html + */ +class CI_Session_memcached_driver extends CI_Session_driver implements SessionHandlerInterface { + + /** + * Memcached instance + * + * @var Memcached + */ + protected $_memcached; + + /** + * Key prefix + * + * @var string + */ + protected $_key_prefix = 'ci_session:'; + + /** + * Lock key + * + * @var string + */ + protected $_lock_key; + + // ------------------------------------------------------------------------ + + /** + * Class constructor + * + * @param array $params Configuration parameters + * @return void + */ + public function __construct(&$params) + { + parent::__construct($params); + + if (empty($this->_config['save_path'])) + { + log_message('error', 'Session: No Memcached save path configured.'); + } + + if ($this->_config['match_ip'] === TRUE) + { + $this->_key_prefix .= $_SERVER['REMOTE_ADDR'].':'; + } + } + + // ------------------------------------------------------------------------ + + public function open($save_path, $name) + { + $this->_memcached = new Memcached(); + $this->_memcached->setOption(Memcached::OPT_BINARY_PROTOCOL, TRUE); // required for touch() usage + $server_list = array(); + foreach ($this->_memcached->getServerList() as $server) + { + $server_list[] = $server['host'].':'.$server['port']; + } + + if ( ! preg_match_all('#,?([^,:]+)\:(\d{1,5})(?:\:(\d+))?#', $this->_config['save_path'], $matches, PREG_SET_ORDER)) + { + $this->_memcached = NULL; + log_message('error', 'Session: Invalid Memcached save path format: '.$this->_config['save_path']); + return FALSE; + } + + foreach ($matches as $match) + { + // If Memcached already has this server (or if the port is invalid), skip it + if (in_array($match[1].':'.$match[2], $server_list, TRUE)) + { + log_message('debug', 'Session: Memcached server pool already has '.$match[1].':'.$match[2]); + continue; + } + + if ( ! $this->_memcached->addServer($match[1], $match[2], isset($match[3]) ? $match[3] : 0)) + { + log_message('error', 'Could not add '.$match[1].':'.$match[2].' to Memcached server pool.'); + } + else + { + $server_list[] = $match[1].':'.$match[2]; + } + } + + if (empty($server_list)) + { + log_message('error', 'Session: Memcached server pool is empty.'); + return FALSE; + } + + return TRUE; + } + + // ------------------------------------------------------------------------ + + public function read($session_id) + { + if (isset($this->_memcached) && $this->_get_lock($session_id)) + { + // Needed by write() to detect session_regenerate_id() calls + $this->_session_id = $session_id; + + $session_data = (string) $this->_memcached->get($this->_key_prefix.$session_id); + $this->_fingerprint = md5($session_data); + return $session_data; + } + + return FALSE; + } + + public function write($session_id, $session_data) + { + if ( ! isset($this->_memcached)) + { + return FALSE; + } + // Was the ID regenerated? + elseif ($session_id !== $this->_session_id) + { + if ( ! $this->_release_lock() OR ! $this->_get_lock($session_id)) + { + return FALSE; + } + + $this->_fingerprint = md5(''); + $this->_session_id = $session_id; + } + + if (isset($this->_lock_key)) + { + $this->_memcached->replace($this->_lock_key, time(), 5); + if ($this->_fingerprint !== ($fingerprint = md5($session_data))) + { + if ($this->_memcached->set($this->_key_prefix.$session_id, $session_data, $this->_config['expiration'])) + { + $this->_fingerprint = $fingerprint; + return TRUE; + } + + return FALSE; + } + + return $this->_memcached->touch($this->_key_prefix.$session_id, $this->_config['expiration']); + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function close() + { + if (isset($this->_memcached)) + { + isset($this->_lock_key) && $this->_memcached->delete($this->_lock_key); + if ( ! $this->_memcached->quit()) + { + return FALSE; + } + + $this->_memcached = NULL; + return TRUE; + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function destroy($session_id) + { + if (isset($this->_memcached, $this->_lock_key)) + { + $this->_memcached->delete($this->_key_prefix.$session_id); + return $this->_cookie_destroy(); + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function gc($maxlifetime) + { + // Not necessary, Memcached takes care of that. + return TRUE; + } + + // ------------------------------------------------------------------------ + + protected function _get_lock($session_id) + { + if (isset($this->_lock_key)) + { + return $this->_memcached->replace($this->_lock_key, time(), 5); + } + + $lock_key = $this->_key_prefix.$session_id.':lock'; + if ( ! ($ts = $this->_memcached->get($lock_key))) + { + if ( ! $this->_memcached->set($lock_key, TRUE, 5)) + { + log_message('error', 'Session: Error while trying to obtain lock for '.$this->_key_prefix.$session_id); + return FALSE; + } + + $this->_lock_key = $lock_key; + $this->_lock = TRUE; + return TRUE; + } + + // Another process has the lock, we'll try to wait for it to free itself ... + $attempt = 0; + while ($attempt++ < 5) + { + usleep(((time() - $ts) * 1000000) - 20000); + if (($ts = $this->_memcached->get($lock_key)) < time()) + { + continue; + } + + if ( ! $this->_memcached->set($lock_key, time(), 5)) + { + log_message('error', 'Session: Error while trying to obtain lock for '.$this->_key_prefix.$session_id); + return FALSE; + } + + $this->_lock_key = $lock_key; + break; + } + + if ($attempt === 5) + { + log_message('error', 'Session: Unable to obtain lock for '.$this->_key_prefix.$session_id.' after 5 attempts, aborting.'); + return FALSE; + } + + $this->_lock = TRUE; + return TRUE; + } + + // ------------------------------------------------------------------------ + + protected function _release_lock() + { + if (isset($this->_memcached, $this->_lock_key) && $this->_lock) + { + if ( ! $this->_memcached->delete($this->_lock_key) && $this->_memcached->getResultCode() !== Memcached::RES_NOTFOUND) + { + log_message('error', 'Session: Error while trying to free lock for '.$this->_key_prefix.$session_id); + return FALSE; + } + + $this->_lock_key = NULL; + $this->_lock = FALSE; + } + + return TRUE; + } + +} + +/* End of file Session_memcached_driver.php */ +/* Location: ./system/libraries/Session/drivers/Session_memcached_driver.php */
\ No newline at end of file diff --git a/system/libraries/Session/drivers/Session_native.php b/system/libraries/Session/drivers/Session_native.php deleted file mode 100644 index c95e7f23f..000000000 --- a/system/libraries/Session/drivers/Session_native.php +++ /dev/null @@ -1,257 +0,0 @@ -<?php -/** - * CodeIgniter - * - * An open source application development framework for PHP - * - * This content is released under the MIT License (MIT) - * - * Copyright (c) 2014 - 2015, British Columbia Institute of Technology - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - * - * @package CodeIgniter - * @author EllisLab Dev Team - * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) - * @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/) - * @license http://opensource.org/licenses/MIT MIT License - * @link http://codeigniter.com - * @since Version 1.0.0 - * @filesource - */ -defined('BASEPATH') OR exit('No direct script access allowed'); - -/** - * Native PHP session management driver - * - * This is the driver that uses the native PHP $_SESSION array through the Session driver library. - * - * @package CodeIgniter - * @subpackage Libraries - * @category Sessions - * @author EllisLab Dev Team - */ -class CI_Session_native extends CI_Session_driver { - - /** - * Initialize session driver object - * - * @return void - */ - protected function initialize() - { - // Get config parameters - $config = array(); - $prefs = array( - 'sess_cookie_name', - 'sess_expire_on_close', - 'sess_expiration', - 'sess_match_ip', - 'sess_match_useragent', - 'sess_time_to_update', - 'cookie_prefix', - 'cookie_path', - 'cookie_domain', - 'cookie_secure', - 'cookie_httponly' - ); - - foreach ($prefs as $key) - { - $config[$key] = isset($this->_parent->params[$key]) - ? $this->_parent->params[$key] - : $this->CI->config->item($key); - } - - // Set session name, if specified - if ($config['sess_cookie_name']) - { - // Differentiate name from cookie driver with '_id' suffix - $name = $config['sess_cookie_name'].'_id'; - if ($config['cookie_prefix']) - { - // Prepend cookie prefix - $name = $config['cookie_prefix'].$name; - } - session_name($name); - } - - // Set expiration, path, and domain - $expire = 7200; - $path = '/'; - $domain = ''; - $secure = (bool) $config['cookie_secure']; - $http_only = (bool) $config['cookie_httponly']; - - if ($config['sess_expiration'] !== FALSE) - { - // Default to 2 years if expiration is "0" - $expire = ($config['sess_expiration'] == 0) ? (60*60*24*365*2) : $config['sess_expiration']; - } - - if ($config['cookie_path']) - { - // Use specified path - $path = $config['cookie_path']; - } - - if ($config['cookie_domain']) - { - // Use specified domain - $domain = $config['cookie_domain']; - } - - session_set_cookie_params($config['sess_expire_on_close'] ? 0 : $expire, $path, $domain, $secure, $http_only); - - // Start session - session_start(); - - // Check session expiration, ip, and agent - $now = time(); - $destroy = FALSE; - if (isset($_SESSION['last_activity']) && (($_SESSION['last_activity'] + $expire) < $now OR $_SESSION['last_activity'] > $now)) - { - // Expired - destroy - log_message('debug', 'Session: Expired'); - $destroy = TRUE; - } - elseif ($config['sess_match_ip'] === TRUE && isset($_SESSION['ip_address']) - && $_SESSION['ip_address'] !== $this->CI->input->ip_address()) - { - // IP doesn't match - destroy - log_message('debug', 'Session: IP address mismatch'); - $destroy = TRUE; - } - elseif ($config['sess_match_useragent'] === TRUE && isset($_SESSION['user_agent']) - && $_SESSION['user_agent'] !== trim(substr($this->CI->input->user_agent(), 0, 50))) - { - // Agent doesn't match - destroy - log_message('debug', 'Session: User Agent string mismatch'); - $destroy = TRUE; - } - - // Destroy expired or invalid session - if ($destroy) - { - // Clear old session and start new - $this->sess_destroy(); - session_start(); - } - - // Check for update time - if ($config['sess_time_to_update'] && isset($_SESSION['last_activity']) - && ($_SESSION['last_activity'] + $config['sess_time_to_update']) < $now) - { - // Changing the session ID amidst a series of AJAX calls causes problems - if ( ! $this->CI->input->is_ajax_request()) - { - // Regenerate ID, but don't destroy session - log_message('debug', 'Session: Regenerate ID'); - $this->sess_regenerate(FALSE); - } - } - - // Set activity time - $_SESSION['last_activity'] = $now; - - // Set matching values as required - if ($config['sess_match_ip'] === TRUE && ! isset($_SESSION['ip_address'])) - { - // Store user IP address - $_SESSION['ip_address'] = $this->CI->input->ip_address(); - } - - if ($config['sess_match_useragent'] === TRUE && ! isset($_SESSION['user_agent'])) - { - // Store user agent string - $_SESSION['user_agent'] = trim(substr($this->CI->input->user_agent(), 0, 50)); - } - - // Make session ID available - $_SESSION['session_id'] = session_id(); - } - - // ------------------------------------------------------------------------ - - /** - * Save the session data - * - * @return void - */ - public function sess_save() - { - // Nothing to do - changes to $_SESSION are automatically saved - } - - // ------------------------------------------------------------------------ - - /** - * Destroy the current session - * - * @return void - */ - public function sess_destroy() - { - // Cleanup session - $_SESSION = array(); - $name = session_name(); - if (isset($_COOKIE[$name])) - { - // Clear session cookie - $params = session_get_cookie_params(); - setcookie($name, '', time() - 42000, $params['path'], $params['domain'], $params['secure'], $params['httponly']); - unset($_COOKIE[$name]); - } - session_destroy(); - } - - // ------------------------------------------------------------------------ - - /** - * Regenerate the current session - * - * Regenerate the session id - * - * @param bool Destroy session data flag (default: FALSE) - * @return void - */ - public function sess_regenerate($destroy = FALSE) - { - // Just regenerate id, passing destroy flag - session_regenerate_id($destroy); - $_SESSION['session_id'] = session_id(); - } - - // ------------------------------------------------------------------------ - - /** - * Get a reference to user data array - * - * @return array Reference to userdata - */ - public function &get_userdata() - { - // Just return reference to $_SESSION - return $_SESSION; - } - -} - -/* End of file Session_native.php */ -/* Location: ./system/libraries/Session/drivers/Session_native.php */
\ No newline at end of file diff --git a/system/libraries/Session/drivers/Session_redis_driver.php b/system/libraries/Session/drivers/Session_redis_driver.php new file mode 100644 index 000000000..e8eac9857 --- /dev/null +++ b/system/libraries/Session/drivers/Session_redis_driver.php @@ -0,0 +1,332 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014, British Columbia Institute of Technology + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://opensource.org/licenses/MIT MIT License + * @link http://codeigniter.com + * @since Version 3.0.0 + * @filesource + */ +defined('BASEPATH') OR exit('No direct script access allowed'); + +/** + * CodeIgniter Session Redis Driver + * + * @package CodeIgniter + * @subpackage Libraries + * @category Sessions + * @author Andrey Andreev + * @link http://codeigniter.com/user_guide/libraries/sessions.html + */ +class CI_Session_redis_driver extends CI_Session_driver implements SessionHandlerInterface { + + /** + * phpRedis instance + * + * @var resource + */ + protected $_redis; + + /** + * Key prefix + * + * @var string + */ + protected $_key_prefix = 'ci_session:'; + + /** + * Lock key + * + * @var string + */ + protected $_lock_key; + + // ------------------------------------------------------------------------ + + /** + * Class constructor + * + * @param array $params Configuration parameters + * @return void + */ + public function __construct(&$params) + { + parent::__construct($params); + + if (empty($this->_config['save_path'])) + { + log_message('error', 'Session: No Redis save path configured.'); + } + elseif (preg_match('#(?:tcp://)?([^:?]+)(?:\:(\d+))?(\?.+)?#', $this->_config['save_path'], $matches)) + { + isset($matches[3]) OR $matches[3] = ''; // Just to avoid undefined index notices below + $this->_config['save_path'] = array( + 'host' => $matches[1], + 'port' => empty($matches[2]) ? NULL : $matches[2], + 'password' => preg_match('#auth=([^\s&]+)#', $matches[3], $match) ? $match[1] : NULL, + 'database' => preg_match('#database=(\d+)#', $matches[3], $match) ? (int) $match[1] : NULL, + 'timeout' => preg_match('#timeout=(\d+\.\d+)#', $matches[3], $match) ? (float) $match[1] : NULL + ); + + preg_match('#prefix=([^\s&]+)#', $matches[3], $match) && $this->_key_prefix = $match[1]; + } + else + { + log_message('error', 'Session: Invalid Redis save path format: '.$this->_config['save_path']); + } + + if ($this->_config['match_ip'] === TRUE) + { + $this->_key_prefix .= $_SERVER['REMOTE_ADDR'].':'; + } + } + + // ------------------------------------------------------------------------ + + public function open($save_path, $name) + { + if (empty($this->_config['save_path'])) + { + return FALSE; + } + + $redis = new Redis(); + if ( ! $redis->connect($this->_config['save_path']['host'], $this->_config['save_path']['port'], $this->_config['save_path']['timeout'])) + { + log_message('error', 'Session: Unable to connect to Redis with the configured settings.'); + } + elseif (isset($this->_config['save_path']['password']) && ! $redis->auth($this->_config['save_path']['password'])) + { + log_message('error', 'Session: Unable to authenticate to Redis instance.'); + } + elseif (isset($this->_config['save_path']['database']) && ! $redis->select($this->_config['save_path']['database'])) + { + log_message('error', 'Session: Unable to select Redis database with index '.$this->_config['save_path']['database']); + } + else + { + $this->_redis = $redis; + return TRUE; + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function read($session_id) + { + if (isset($this->_redis) && $this->_get_lock($session_id)) + { + // Needed by write() to detect session_regenerate_id() calls + $this->_session_id = $session_id; + + $session_data = (string) $this->_redis->get($this->_key_prefix.$session_id); + $this->_fingerprint = md5($session_data); + return $session_data; + } + + return FALSE; + } + + public function write($session_id, $session_data) + { + if ( ! isset($this->_redis)) + { + return FALSE; + } + // Was the ID regenerated? + elseif ($session_id !== $this->_session_id) + { + if ( ! $this->_release_lock() OR ! $this->_get_lock($session_id)) + { + return FALSE; + } + + $this->_fingerprint = md5(''); + $this->_session_id = $session_id; + } + + if (isset($this->_lock_key)) + { + $this->_redis->setTimeout($this->_lock_key, 5); + if ($this->_fingerprint !== ($fingerprint = md5($session_data))) + { + if ($this->_redis->set($this->_key_prefix.$session_id, $session_data, $this->_config['expiration'])) + { + $this->_fingerprint = $fingerprint; + return TRUE; + } + + return FALSE; + } + + return $this->_redis->setTimeout($this->_key_prefix.$session_id, $this->_config['expiration']); + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function close() + { + if (isset($this->_redis)) + { + try { + if ($this->_redis->ping() === '+PONG') + { + isset($this->_lock_key) && $this->_redis->delete($this->_lock_key); + if ( ! $this->_redis->close()) + { + return FALSE; + } + } + } + catch (RedisException $e) + { + log_message('error', 'Session: Got RedisException on close(): '.$e->getMessage()); + } + + $this->_redis = NULL; + return TRUE; + } + + return TRUE; + } + + // ------------------------------------------------------------------------ + + public function destroy($session_id) + { + if (isset($this->_redis, $this->_lock_key)) + { + if ($this->_redis->delete($this->_key_prefix.$session_id) !== 1) + { + log_message('debug', 'Session: Redis::delete() expected to return 1, got '.var_export($result, TRUE).' instead.'); + } + + return $this->_cookie_destroy(); + } + + return FALSE; + } + + // ------------------------------------------------------------------------ + + public function gc($maxlifetime) + { + // Not necessary, Redis takes care of that. + return TRUE; + } + + // ------------------------------------------------------------------------ + + protected function _get_lock($session_id) + { + if (isset($this->_lock_key)) + { + return $this->_redis->setTimeout($this->_lock_key, 5); + } + + $lock_key = $this->_key_prefix.$session_id.':lock'; + if (($ttl = $this->_redis->ttl($lock_key)) < 1) + { + if ( ! $this->_redis->setex($lock_key, 5, time())) + { + log_message('error', 'Session: Error while trying to obtain lock for '.$this->_key_prefix.$session_id); + return FALSE; + } + + $this->_lock_key = $lock_key; + + if ($ttl === -1) + { + log_message('debug', 'Session: Lock for '.$this->_key_prefix.$session_id.' had no TTL, overriding.'); + } + + $this->_lock = TRUE; + return TRUE; + } + + // Another process has the lock, we'll try to wait for it to free itself ... + $attempt = 0; + while ($attempt++ < 5) + { + usleep(($ttl * 1000000) - 20000); + if (($ttl = $this->_redis->ttl($lock_key)) > 0) + { + continue; + } + + if ( ! $this->_redis->setex($lock_key, 5, time())) + { + log_message('error', 'Session: Error while trying to obtain lock for '.$this->_key_prefix.$session_id); + return FALSE; + } + + $this->_lock_key = $lock_key; + break; + } + + if ($attempt === 5) + { + log_message('error', 'Session: Unable to obtain lock for '.$this->_key_prefix.$session_id.' after 5 attempts, aborting.'); + return FALSE; + } + + $this->_lock = TRUE; + return TRUE; + } + + // ------------------------------------------------------------------------ + + protected function _release_lock() + { + if (isset($this->_redis, $this->_lock_key) && $this->_lock) + { + if ( ! $this->_redis->delete($this->_lock_key)) + { + log_message('error', 'Session: Error while trying to free lock for '.$this->_key_prefix.$session_id); + return FALSE; + } + + $this->_lock_key = NULL; + $this->_lock = FALSE; + } + + return TRUE; + } + +} + +/* End of file Session_redis_driver.php */ +/* Location: ./system/libraries/Session/drivers/Session_redis_driver.php */
\ No newline at end of file |