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paulgoughbooks_old / trunk / system / Session / Session.php
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<?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 * Copyright (c) 2019-2020 CodeIgniter Foundation * * 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 CodeIgniter Dev Team * @copyright 2019-2020 CodeIgniter Foundation * @license https://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 4.0.0 * @filesource */ namespace CodeIgniter\Session; use Psr\Log\LoggerAwareTrait; /** * Implementation of CodeIgniter session container. * * Session configuration is done through session variables and cookie related * variables in app/config/App.php */ class Session implements SessionInterface { use LoggerAwareTrait; /** * Instance of the driver to use. * * @var \CodeIgniter\Log\Handlers\HandlerInterface */ protected $driver; /** * The storage driver to use: files, database, redis, memcached * * @var string */ protected $sessionDriverName; /** * The session cookie name, must contain only [0-9a-z_-] characters. * * @var string */ protected $sessionCookieName = 'ci_session'; /** * The number of SECONDS you want the session to last. * Setting it to 0 (zero) means expire when the browser is closed. * * @var integer */ protected $sessionExpiration = 7200; /** * The location to save sessions to, driver dependent.. * * For the 'files' driver, it's a path to a writable directory. * WARNING: Only absolute paths are supported! * * For the 'database' driver, it's a table name. * * TODO: address memcache & redis needs * * IMPORTANT: You are REQUIRED to set a valid save path! * * @var string */ protected $sessionSavePath; /** * Whether to match the user's IP address when reading the session data. * * WARNING: If you're using the database driver, don't forget to update * your session table's PRIMARY KEY when changing this setting. * * @var boolean */ protected $sessionMatchIP = false; /** * How many seconds between CI regenerating the session ID. * * @var integer */ protected $sessionTimeToUpdate = 300; /** * Whether to destroy session data associated with the old session ID * when auto-regenerating the session ID. When set to FALSE, the data * will be later deleted by the garbage collector. * * @var boolean */ protected $sessionRegenerateDestroy = false; /** * The domain name to use for cookies. * Set to .your-domain.com for site-wide cookies. * * @var string */ protected $cookieDomain = ''; /** * Path used for storing cookies. * Typically will be a forward slash. * * @var string */ protected $cookiePath = '/'; /** * Cookie will only be set if a secure HTTPS connection exists. * * @var boolean */ protected $cookieSecure = false; /** * sid regex expression * * @var string */ protected $sidRegexp; /** * Logger instance to record error messages and warnings. * * @var \PSR\Log\LoggerInterface */ protected $logger; //-------------------------------------------------------------------- /** * Constructor. * * Extract configuration settings and save them here. * * @param \SessionHandlerInterface $driver * @param \Config\App $config */ public function __construct(\SessionHandlerInterface $driver, $config) { $this->driver = $driver; $this->sessionDriverName = $config->sessionDriver; $this->sessionCookieName = $config->sessionCookieName; $this->sessionExpiration = $config->sessionExpiration; $this->sessionSavePath = $config->sessionSavePath; $this->sessionMatchIP = $config->sessionMatchIP; $this->sessionTimeToUpdate = $config->sessionTimeToUpdate; $this->sessionRegenerateDestroy = $config->sessionRegenerateDestroy; $this->cookieDomain = $config->cookieDomain; $this->cookiePath = $config->cookiePath; $this->cookieSecure = $config->cookieSecure; helper('array'); } //-------------------------------------------------------------------- /** * Initialize the session container and starts up the session. * * @return mixed */ public function start() { if (is_cli() && ENVIRONMENT !== 'testing') { // @codeCoverageIgnoreStart $this->logger->debug('Session: Initialization under CLI aborted.'); return; // @codeCoverageIgnoreEnd } elseif ((bool) ini_get('session.auto_start')) { $this->logger->error('Session: session.auto_start is enabled in php.ini. Aborting.'); return; } elseif (session_status() === PHP_SESSION_ACTIVE) { $this->logger->warning('Session: Sessions is enabled, and one exists.Please don\'t $session->start();'); return; } if (! $this->driver instanceof \SessionHandlerInterface) { $this->logger->error("Session: Handler '" . $this->driver . "' doesn't implement SessionHandlerInterface. Aborting."); } $this->configure(); $this->setSaveHandler(); // Sanitize the cookie, because apparently PHP doesn't do that for userspace handlers if (isset($_COOKIE[$this->sessionCookieName]) && ( ! is_string($_COOKIE[$this->sessionCookieName]) || ! preg_match('#\A' . $this->sidRegexp . '\z#', $_COOKIE[$this->sessionCookieName]) ) ) { unset($_COOKIE[$this->sessionCookieName]); } $this->startSession(); // Is session ID auto-regeneration configured? (ignoring ajax requests) if ((empty($_SERVER['HTTP_X_REQUESTED_WITH']) || strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) !== 'xmlhttprequest') && ($regenerate_time = $this->sessionTimeToUpdate) > 0 ) { if (! isset($_SESSION['__ci_last_regenerate'])) { $_SESSION['__ci_last_regenerate'] = time(); } elseif ($_SESSION['__ci_last_regenerate'] < (time() - $regenerate_time)) { $this->regenerate((bool) $this->sessionRegenerateDestroy); } } // Another work-around ... PHP doesn't seem to send the session cookie // unless it is being currently created or regenerated elseif (isset($_COOKIE[$this->sessionCookieName]) && $_COOKIE[$this->sessionCookieName] === session_id()) { $this->setCookie(); } $this->initVars(); $this->logger->info("Session: Class initialized using '" . $this->sessionDriverName . "' driver."); return $this; } //-------------------------------------------------------------------- /** * Does a full stop of the session: * * - destroys the session * - unsets the session id * - destroys the session cookie */ public function stop() { setcookie( $this->sessionCookieName, session_id(), 1, $this->cookiePath, $this->cookieDomain, $this->cookieSecure, true ); session_regenerate_id(true); } //-------------------------------------------------------------------- /** * Configuration. * * Handle input binds and configuration defaults. */ protected function configure() { if (empty($this->sessionCookieName)) { $this->sessionCookieName = ini_get('session.name'); } else { ini_set('session.name', $this->sessionCookieName); } session_set_cookie_params( $this->sessionExpiration, $this->cookiePath, $this->cookieDomain, $this->cookieSecure, true // HTTP only; Yes, this is intentional and not configurable for security reasons. ); //if (empty($this->sessionExpiration)) if (! isset($this->sessionExpiration)) { $this->sessionExpiration = (int) ini_get('session.gc_maxlifetime'); } else { ini_set('session.gc_maxlifetime', (int) $this->sessionExpiration); } if (! empty($this->sessionSavePath)) { ini_set('session.save_path', $this->sessionSavePath); } // Security is king ini_set('session.use_trans_sid', 0); ini_set('session.use_strict_mode', 1); ini_set('session.use_cookies', 1); ini_set('session.use_only_cookies', 1); $this->configureSidLength(); } // ------------------------------------------------------------------------ /** * Configure session ID length * * To make life easier, we used to force SHA-1 and 4 bits per * character on everyone. And of course, someone was unhappy. * * Then PHP 7.1 broke backwards-compatibility because ext/session * is such a mess that nobody wants to touch it with a pole stick, * and the one guy who does, nobody has the energy to argue with. * * So we were forced to make changes, and OF COURSE something was * going to break and now we have this pile of shit. -- Narf * * @return void */ protected function configureSidLength() { $bits_per_character = (int) (ini_get('session.sid_bits_per_character') !== false ? ini_get('session.sid_bits_per_character') : 4); $sid_length = (int) (ini_get('session.sid_length') !== false ? ini_get('session.sid_length') : 40); if (($sid_length * $bits_per_character) < 160) { $bits = ($sid_length * $bits_per_character); // Add as many more characters as necessary to reach at least 160 bits $sid_length += (int) ceil((160 % $bits) / $bits_per_character); ini_set('session.sid_length', $sid_length); } // Yes, 4,5,6 are the only known possible values as of 2016-10-27 switch ($bits_per_character) { case 4: $this->sidRegexp = '[0-9a-f]'; break; case 5: $this->sidRegexp = '[0-9a-v]'; break; case 6: $this->sidRegexp = '[0-9a-zA-Z,-]'; break; } $this->sidRegexp .= '{' . $sid_length . '}'; } //-------------------------------------------------------------------- /** * Handle temporary variables * * Clears old "flash" data, marks the new one for deletion and handles * "temp" data deletion. */ protected function initVars() { if (empty($_SESSION['__ci_vars'])) { return; } $current_time = time(); foreach ($_SESSION['__ci_vars'] as $key => &$value) { 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]); } } if (empty($_SESSION['__ci_vars'])) { unset($_SESSION['__ci_vars']); } } //-------------------------------------------------------------------- //-------------------------------------------------------------------- // Session Utility Methods //-------------------------------------------------------------------- /** * Regenerates the session ID. * * @param boolean $destroy Should old session data be destroyed? */ public function regenerate(bool $destroy = false) { $_SESSION['__ci_last_regenerate'] = time(); session_regenerate_id($destroy); } //-------------------------------------------------------------------- /** * Destroys the current session. */ public function destroy() { session_destroy(); } //-------------------------------------------------------------------- //-------------------------------------------------------------------- // Basic Setters and Getters //-------------------------------------------------------------------- /** * Sets user data into the session. * * If $data is a string, then it is interpreted as a session property * key, and $value is expected to be non-null. * * If $data is an array, it is expected to be an array of key/value pairs * to be set as session properties. * * @param string|array $data Property name or associative array of properties * @param string|array $value Property value if single key provided */ public function set($data, $value = null) { if (is_array($data)) { foreach ($data as $key => &$value) { if (is_int($key)) { $_SESSION[$value] = null; } else { $_SESSION[$key] = $value; } } return; } $_SESSION[$data] = $value; } //-------------------------------------------------------------------- /** * Get user data that has been set in the session. * * If the property exists as "normal", returns it. * Otherwise, returns an array of any temp or flash data values with the * property key. * * Replaces the legacy method $session->userdata(); * * @param string $key Identifier of the session property to retrieve * @return array|null The property value(s) */ public function get(string $key = null) { if (! empty($key) && (! is_null($value = isset($_SESSION[$key]) ? $_SESSION[$key] : null) || ! is_null($value = dot_array_search($key, $_SESSION ?? [])))) { return $value; } elseif (empty($_SESSION)) { return $key === null ? [] : null; } if (! empty($key)) { return null; } $userdata = []; $_exclude = array_merge( ['__ci_vars'], $this->getFlashKeys(), $this->getTempKeys() ); $keys = array_keys($_SESSION); foreach ($keys as $key) { if (! in_array($key, $_exclude, true)) { $userdata[$key] = $_SESSION[$key]; } } return $userdata; } //-------------------------------------------------------------------- /** * Returns whether an index exists in the session array. * * @param string $key Identifier of the session property we are interested in. * * @return boolean */ public function has(string $key): bool { return isset($_SESSION[$key]); } //-------------------------------------------------------------------- /** * Push new value onto session value that is array. * * @param string $key Identifier of the session property we are interested in. * @param array $data value to be pushed to existing session key. * * @return void */ public function push(string $key, array $data) { if ($this->has($key) && is_array($value = $this->get($key))) { $this->set($key, array_merge($value, $data)); } } //-------------------------------------------------------------------- /** * Remove one or more session properties. * * If $key is an array, it is interpreted as an array of string property * identifiers to remove. Otherwise, it is interpreted as the identifier * of a specific session property to remove. * * @param string|array $key Identifier of the session property or properties to remove. */ public function remove($key) { if (is_array($key)) { foreach ($key as $k) { unset($_SESSION[$k]); } return; } unset($_SESSION[$key]); } //-------------------------------------------------------------------- /** * Magic method to set variables in the session by simply calling * $session->foo = bar; * * @param string $key Identifier of the session property to set. * @param string|array $value */ public function __set(string $key, $value) { $_SESSION[$key] = $value; } //-------------------------------------------------------------------- /** * Magic method to get session variables by simply calling * $foo = $session->foo; * * @param string $key Identifier of the session property to remove. * * @return null|string */ public function __get(string $key) { // Note: Keep this order the same, just in case somebody wants to // use 'session_id' as a session data key, for whatever reason if (isset($_SESSION[$key])) { return $_SESSION[$key]; } elseif ($key === 'session_id') { return session_id(); } return null; } //-------------------------------------------------------------------- /** * Magic method to check for session variables. * Different from has() in that it will validate 'session_id' as well. * Mostly used by internal PHP functions, users should stick to has() * * @param string $key Identifier of the session property to remove. * * @return boolean */ public function __isset(string $key): bool { return isset($_SESSION[$key]) || ($key === 'session_id'); } //-------------------------------------------------------------------- //-------------------------------------------------------------------- // Flash Data Methods //-------------------------------------------------------------------- /** * Sets data into the session that will only last for a single request. * Perfect for use with single-use status update messages. * * If $data is an array, it is interpreted as an associative array of * key/value pairs for flashdata properties. * Otherwise, it is interpreted as the identifier of a specific * flashdata property, with $value containing the property value. * * @param array|string $data Property identifier or associative array of properties * @param string|array $value Property value if $data is a scalar */ public function setFlashdata($data, $value = null) { $this->set($data, $value); $this->markAsFlashdata(is_array($data) ? array_keys($data) : $data); } //-------------------------------------------------------------------- /** * Retrieve one or more items of flash data from the session. * * If the item key is null, return all flashdata. * * @param string $key Property identifier * @return array|null The requested property value, or an associative array of them */ public function getFlashdata(string $key = null) { if (isset($key)) { return (isset($_SESSION['__ci_vars'], $_SESSION['__ci_vars'][$key], $_SESSION[$key]) && ! is_int($_SESSION['__ci_vars'][$key])) ? $_SESSION[$key] : null; } $flashdata = []; if (! empty($_SESSION['__ci_vars'])) { foreach ($_SESSION['__ci_vars'] as $key => &$value) { is_int($value) || $flashdata[$key] = $_SESSION[$key]; } } return $flashdata; } //-------------------------------------------------------------------- /** * Keeps a single piece of flash data alive for one more request. * * @param array|string $key Property identifier or array of them */ public function keepFlashdata($key) { $this->markAsFlashdata($key); } //-------------------------------------------------------------------- /** * Mark a session property or properties as flashdata. * * @param array|string $key Property identifier or array of them * * @return boolean False if any of the properties are not already set */ public function markAsFlashdata($key): bool { if (is_array($key)) { foreach ($key as $sessionKey) { if (! isset($_SESSION[$sessionKey])) { return false; } } $new = array_fill_keys($key, 'new'); $_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars']) ? array_merge($_SESSION['__ci_vars'], $new) : $new; return true; } if (! isset($_SESSION[$key])) { return false; } $_SESSION['__ci_vars'][$key] = 'new'; return true; } //-------------------------------------------------------------------- /** * Unmark data in the session as flashdata. * * @param mixed $key Property identifier or array of them */ public function unmarkFlashdata($key) { if (empty($_SESSION['__ci_vars'])) { return; } is_array($key) || $key = [$key]; foreach ($key as $k) { if (isset($_SESSION['__ci_vars'][$k]) && ! is_int($_SESSION['__ci_vars'][$k])) { unset($_SESSION['__ci_vars'][$k]); } } if (empty($_SESSION['__ci_vars'])) { unset($_SESSION['__ci_vars']); } } //-------------------------------------------------------------------- /** * Retrieve all of the keys for session data marked as flashdata. * * @return array The property names of all flashdata */ public function getFlashKeys(): array { if (! isset($_SESSION['__ci_vars'])) { return []; } $keys = []; foreach (array_keys($_SESSION['__ci_vars']) as $key) { is_int($_SESSION['__ci_vars'][$key]) || $keys[] = $key; } return $keys; } //-------------------------------------------------------------------- //-------------------------------------------------------------------- // Temp Data Methods //-------------------------------------------------------------------- /** * Sets new data into the session, and marks it as temporary data * with a set lifespan. * * @param string|array $data Session data key or associative array of items * @param null $value Value to store * @param integer $ttl Time-to-live in seconds */ public function setTempdata($data, $value = null, int $ttl = 300) { $this->set($data, $value); $this->markAsTempdata($data, $ttl); } //-------------------------------------------------------------------- /** * Returns either a single piece of tempdata, or all temp data currently * in the session. * * @param string $key Session data key * @return mixed Session data value or null if not found. */ public function getTempdata(string $key = null) { if (isset($key)) { return (isset($_SESSION['__ci_vars'], $_SESSION['__ci_vars'][$key], $_SESSION[$key]) && is_int($_SESSION['__ci_vars'][$key])) ? $_SESSION[$key] : null; } $tempdata = []; if (! empty($_SESSION['__ci_vars'])) { foreach ($_SESSION['__ci_vars'] as $key => &$value) { is_int($value) && $tempdata[$key] = $_SESSION[$key]; } } return $tempdata; } //-------------------------------------------------------------------- /** * Removes a single piece of temporary data from the session. * * @param string $key Session data key */ public function removeTempdata(string $key) { $this->unmarkTempdata($key); unset($_SESSION[$key]); } //-------------------------------------------------------------------- /** * Mark one of more pieces of data as being temporary, meaning that * it has a set lifespan within the session. * * @param string|array $key Property identifier or array of them * @param integer $ttl Time to live, in seconds * * @return boolean False if any of the properties were not set */ public function markAsTempdata($key, int $ttl = 300): bool { $ttl += time(); if (is_array($key)) { $temp = []; foreach ($key as $k => $v) { // Do we have a key => ttl pair, or just a key? if (is_int($k)) { $k = $v; $v = $ttl; } elseif (is_string($v)) { $v = time() + $ttl; } else { $v += time(); } if (! array_key_exists($k, $_SESSION)) { return false; } $temp[$k] = $v; } $_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars']) ? array_merge($_SESSION['__ci_vars'], $temp) : $temp; return true; } if (! isset($_SESSION[$key])) { return false; } $_SESSION['__ci_vars'][$key] = $ttl; return true; } //-------------------------------------------------------------------- /** * Unmarks temporary data in the session, effectively removing its * lifespan and allowing it to live as long as the session does. * * @param string|array $key Property identifier or array of them */ public function unmarkTempdata($key) { if (empty($_SESSION['__ci_vars'])) { return; } is_array($key) || $key = [$key]; foreach ($key as $k) { if (isset($_SESSION['__ci_vars'][$k]) && is_int($_SESSION['__ci_vars'][$k])) { unset($_SESSION['__ci_vars'][$k]); } } if (empty($_SESSION['__ci_vars'])) { unset($_SESSION['__ci_vars']); } } //-------------------------------------------------------------------- /** * Retrieve the keys of all session data that have been marked as temporary data. * * @return array */ public function getTempKeys(): array { if (! isset($_SESSION['__ci_vars'])) { return []; } $keys = []; foreach (array_keys($_SESSION['__ci_vars']) as $key) { is_int($_SESSION['__ci_vars'][$key]) && $keys[] = $key; } return $keys; } //-------------------------------------------------------------------- /** * Sets the driver as the session handler in PHP. * Extracted for easier testing. */ protected function setSaveHandler() { session_set_save_handler($this->driver, true); } //-------------------------------------------------------------------- /** * Starts the session. * Extracted for testing reasons. */ protected function startSession() { if (ENVIRONMENT === 'testing') { $_SESSION = []; return; } // @codeCoverageIgnoreStart session_start(); // @codeCoverageIgnoreEnd } //-------------------------------------------------------------------- /** * Takes care of setting the cookie on the client side. * Extracted for testing reasons. */ protected function setCookie() { setcookie( $this->sessionCookieName, session_id(), (empty($this->sessionExpiration) ? 0 : time() + $this->sessionExpiration), $this->cookiePath, $this->cookieDomain, $this->cookieSecure, true ); } //-------------------------------------------------------------------- } |
Commits for paulgoughbooks_old/trunk/system/Session/Session.php
Revision | Author | Commited | Message |
---|---|---|---|
2 | tporter | Tue 03 Nov, 2020 08:50:21 +0000 | Migration of Paul Goughs Books site to Codeignitor 4 |