mirror of
https://github.com/alextselegidis/easyappointments.git
synced 2024-12-05 06:13:16 +03:00
433 lines
11 KiB
PHP
433 lines
11 KiB
PHP
|
<?php
|
||
|
/**
|
||
|
* CodeIgniter
|
||
|
*
|
||
|
* An open source application development framework for PHP
|
||
|
*
|
||
|
* This content is released under the MIT License (MIT)
|
||
|
*
|
||
|
* Copyright (c) 2014 - 2019, 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. (https://ellislab.com/)
|
||
|
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
|
||
|
* @license https://opensource.org/licenses/MIT MIT License
|
||
|
* @link https://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 https://codeigniter.com/userguide3/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;
|
||
|
|
||
|
/**
|
||
|
* Validate SID regular expression
|
||
|
*
|
||
|
* @var string
|
||
|
*/
|
||
|
protected $_sid_regexp;
|
||
|
|
||
|
/**
|
||
|
* mbstring.func_overload flag
|
||
|
*
|
||
|
* @var bool
|
||
|
*/
|
||
|
protected static $func_overload;
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* 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
|
||
|
{
|
||
|
log_message('debug', 'Session: "sess_save_path" is empty; using "session.save_path" value from php.ini.');
|
||
|
$this->_config['save_path'] = rtrim(ini_get('session.save_path'), '/\\');
|
||
|
}
|
||
|
|
||
|
$this->_sid_regexp = $this->_config['_sid_regexp'];
|
||
|
|
||
|
isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
|
||
|
}
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Open
|
||
|
*
|
||
|
* Sanitizes the save_path directory.
|
||
|
*
|
||
|
* @param string $save_path Path to session files' directory
|
||
|
* @param string $name Session cookie name
|
||
|
* @return bool
|
||
|
*/
|
||
|
public function open($save_path, $name)
|
||
|
{
|
||
|
if ( ! is_dir($save_path))
|
||
|
{
|
||
|
if ( ! 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 $this->_failure;
|
||
|
}
|
||
|
}
|
||
|
elseif ( ! is_writable($save_path))
|
||
|
{
|
||
|
log_message('error', "Session: Configured save path '".$this->_config['save_path']."' is not writable by the PHP process.");
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
|
||
|
$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']) : '');
|
||
|
|
||
|
$this->php5_validate_id();
|
||
|
|
||
|
return $this->_success;
|
||
|
}
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Read
|
||
|
*
|
||
|
* Reads session data and acquires a lock
|
||
|
*
|
||
|
* @param string $session_id Session ID
|
||
|
* @return string Serialized session data
|
||
|
*/
|
||
|
public function read($session_id)
|
||
|
{
|
||
|
// This might seem weird, but PHP 5.6 introduces session_reset(),
|
||
|
// which re-reads session data
|
||
|
if ($this->_file_handle === NULL)
|
||
|
{
|
||
|
$this->_file_new = ! file_exists($this->_file_path.$session_id);
|
||
|
|
||
|
if (($this->_file_handle = fopen($this->_file_path.$session_id, 'c+b')) === FALSE)
|
||
|
{
|
||
|
log_message('error', "Session: Unable to open file '".$this->_file_path.$session_id."'.");
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
|
||
|
if (flock($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 $this->_failure;
|
||
|
}
|
||
|
|
||
|
// 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 '';
|
||
|
}
|
||
|
|
||
|
// Prevent possible data corruption
|
||
|
// See https://github.com/bcit-ci/CodeIgniter/issues/5857
|
||
|
clearstatcache(TRUE, $this->_file_path.$session_id);
|
||
|
}
|
||
|
// We shouldn't need this, but apparently we do ...
|
||
|
// See https://github.com/bcit-ci/CodeIgniter/issues/4039
|
||
|
elseif ($this->_file_handle === FALSE)
|
||
|
{
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
rewind($this->_file_handle);
|
||
|
}
|
||
|
|
||
|
$session_data = '';
|
||
|
for ($read = 0, $length = filesize($this->_file_path.$session_id); $read < $length; $read += self::strlen($buffer))
|
||
|
{
|
||
|
if (($buffer = fread($this->_file_handle, $length - $read)) === FALSE)
|
||
|
{
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
$session_data .= $buffer;
|
||
|
}
|
||
|
|
||
|
$this->_fingerprint = md5($session_data);
|
||
|
return $session_data;
|
||
|
}
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Write
|
||
|
*
|
||
|
* Writes (create / update) session data
|
||
|
*
|
||
|
* @param string $session_id Session ID
|
||
|
* @param string $session_data Serialized session data
|
||
|
* @return bool
|
||
|
*/
|
||
|
public function write($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() === $this->_failure OR $this->read($session_id) === $this->_failure))
|
||
|
{
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
|
||
|
if ( ! is_resource($this->_file_handle))
|
||
|
{
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
elseif ($this->_fingerprint === md5($session_data))
|
||
|
{
|
||
|
return ( ! $this->_file_new && ! touch($this->_file_path.$session_id))
|
||
|
? $this->_failure
|
||
|
: $this->_success;
|
||
|
}
|
||
|
|
||
|
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 $this->_failure;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$this->_fingerprint = md5($session_data);
|
||
|
return $this->_success;
|
||
|
}
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Close
|
||
|
*
|
||
|
* Releases locks and closes file descriptor.
|
||
|
*
|
||
|
* @return bool
|
||
|
*/
|
||
|
public function close()
|
||
|
{
|
||
|
if (is_resource($this->_file_handle))
|
||
|
{
|
||
|
flock($this->_file_handle, LOCK_UN);
|
||
|
fclose($this->_file_handle);
|
||
|
|
||
|
$this->_file_handle = $this->_file_new = $this->_session_id = NULL;
|
||
|
}
|
||
|
|
||
|
return $this->_success;
|
||
|
}
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Destroy
|
||
|
*
|
||
|
* Destroys the current session.
|
||
|
*
|
||
|
* @param string $session_id Session ID
|
||
|
* @return bool
|
||
|
*/
|
||
|
public function destroy($session_id)
|
||
|
{
|
||
|
if ($this->close() === $this->_success)
|
||
|
{
|
||
|
if (file_exists($this->_file_path.$session_id))
|
||
|
{
|
||
|
$this->_cookie_destroy();
|
||
|
return unlink($this->_file_path.$session_id)
|
||
|
? $this->_success
|
||
|
: $this->_failure;
|
||
|
}
|
||
|
|
||
|
return $this->_success;
|
||
|
}
|
||
|
elseif ($this->_file_path !== NULL)
|
||
|
{
|
||
|
clearstatcache();
|
||
|
if (file_exists($this->_file_path.$session_id))
|
||
|
{
|
||
|
$this->_cookie_destroy();
|
||
|
return unlink($this->_file_path.$session_id)
|
||
|
? $this->_success
|
||
|
: $this->_failure;
|
||
|
}
|
||
|
|
||
|
return $this->_success;
|
||
|
}
|
||
|
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
|
||
|
// ------------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Garbage Collector
|
||
|
*
|
||
|
* Deletes expired sessions
|
||
|
*
|
||
|
* @param int $maxlifetime Maximum lifetime of sessions
|
||
|
* @return bool
|
||
|
*/
|
||
|
public function gc($maxlifetime)
|
||
|
{
|
||
|
if ( ! is_dir($this->_config['save_path']) OR ($directory = opendir($this->_config['save_path'])) === FALSE)
|
||
|
{
|
||
|
log_message('debug', "Session: Garbage collector couldn't list files under directory '".$this->_config['save_path']."'.");
|
||
|
return $this->_failure;
|
||
|
}
|
||
|
|
||
|
$ts = time() - $maxlifetime;
|
||
|
|
||
|
$pattern = ($this->_config['match_ip'] === TRUE)
|
||
|
? '[0-9a-f]{32}'
|
||
|
: '';
|
||
|
|
||
|
$pattern = sprintf(
|
||
|
'#\A%s'.$pattern.$this->_sid_regexp.'\z#',
|
||
|
preg_quote($this->_config['cookie_name'])
|
||
|
);
|
||
|
|
||
|
while (($file = readdir($directory)) !== FALSE)
|
||
|
{
|
||
|
// If the filename doesn't match this pattern, it's either not a session file or is not ours
|
||
|
if ( ! preg_match($pattern, $file)
|
||
|
OR ! is_file($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.$file);
|
||
|
}
|
||
|
|
||
|
closedir($directory);
|
||
|
|
||
|
return $this->_success;
|
||
|
}
|
||
|
|
||
|
// --------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Validate ID
|
||
|
*
|
||
|
* Checks whether a session ID record exists server-side,
|
||
|
* to enforce session.use_strict_mode.
|
||
|
*
|
||
|
* @param string $id
|
||
|
* @return bool
|
||
|
*/
|
||
|
public function validateSessionId($id)
|
||
|
{
|
||
|
$result = is_file($this->_file_path.$id);
|
||
|
clearstatcache(TRUE, $this->_file_path.$id);
|
||
|
return $result;
|
||
|
}
|
||
|
|
||
|
// --------------------------------------------------------------------
|
||
|
|
||
|
/**
|
||
|
* Byte-safe strlen()
|
||
|
*
|
||
|
* @param string $str
|
||
|
* @return int
|
||
|
*/
|
||
|
protected static function strlen($str)
|
||
|
{
|
||
|
return (self::$func_overload)
|
||
|
? mb_strlen($str, '8bit')
|
||
|
: strlen($str);
|
||
|
}
|
||
|
}
|