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2018-12-12 07:32:23 +01:00
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<?php
/**
* @package Grav\Framework\Session
*
* @copyright Copyright (C) 2015 - 2018 Trilby Media, LLC. All rights reserved.
* @license MIT License; see LICENSE file for details.
*/
namespace Grav\Framework\Session;
/**
* Class Session
* @package Grav\Framework\Session
*/
class Session implements SessionInterface
{
protected $options;
/**
* @var bool
*/
protected $started = false;
/**
* @var Session
*/
protected static $instance;
/**
* @inheritdoc
*/
public static function getInstance()
{
if (null === self::$instance) {
throw new \RuntimeException("Session hasn't been initialized.", 500);
}
return self::$instance;
}
/**
* @inheritdoc
*/
public function __construct(array $options = [])
{
// Session is a singleton.
if (\PHP_SAPI === 'cli') {
self::$instance = $this;
return;
}
if (null !== self::$instance) {
throw new \RuntimeException('Session has already been initialized.', 500);
}
// Destroy any existing sessions started with session.auto_start
if ($this->isSessionStarted()) {
session_unset();
session_destroy();
}
// Set default options.
$options += array(
'cache_limiter' => 'nocache',
'use_trans_sid' => 0,
'use_cookies' => 1,
'lazy_write' => 1,
'use_strict_mode' => 1
);
$this->setOptions($options);
session_register_shutdown();
self::$instance = $this;
}
/**
* @inheritdoc
*/
public function getId()
{
return session_id();
}
/**
* @inheritdoc
*/
public function setId($id)
{
session_id($id);
return $this;
}
/**
* @inheritdoc
*/
public function getName()
{
return session_name();
}
/**
* @inheritdoc
*/
public function setName($name)
{
session_name($name);
return $this;
}
/**
* @inheritdoc
*/
public function setOptions(array $options)
{
if (headers_sent() || \PHP_SESSION_ACTIVE === session_status()) {
return;
}
$allowedOptions = [
'save_path' => true,
'name' => true,
'save_handler' => true,
'gc_probability' => true,
'gc_divisor' => true,
'gc_maxlifetime' => true,
'serialize_handler' => true,
'cookie_lifetime' => true,
'cookie_path' => true,
'cookie_domain' => true,
'cookie_secure' => true,
'cookie_httponly' => true,
'use_strict_mode' => true,
'use_cookies' => true,
'use_only_cookies' => true,
'referer_check' => true,
'cache_limiter' => true,
'cache_expire' => true,
'use_trans_sid' => true,
'trans_sid_tags' => true, // PHP 7.1
'trans_sid_hosts' => true, // PHP 7.1
'sid_length' => true, // PHP 7.1
'sid_bits_per_character' => true, // PHP 7.1
'upload_progress.enabled' => true,
'upload_progress.cleanup' => true,
'upload_progress.prefix' => true,
'upload_progress.name' => true,
'upload_progress.freq' => true,
'upload_progress.min-freq' => true,
'lazy_write' => true,
'url_rewriter.tags' => true, // Not used in PHP 7.1
'hash_function' => true, // Not used in PHP 7.1
'hash_bits_per_character' => true, // Not used in PHP 7.1
'entropy_file' => true, // Not used in PHP 7.1
'entropy_length' => true, // Not used in PHP 7.1
];
foreach ($options as $key => $value) {
if (is_array($value)) {
// Allow nested options.
foreach ($value as $key2 => $value2) {
$ckey = "{$key}.{$key2}";
if (isset($value2, $allowedOptions[$ckey])) {
$this->ini_set("session.{$ckey}", $value2);
}
}
} elseif (isset($value, $allowedOptions[$key])) {
$this->ini_set("session.{$key}", $value);
}
}
}
/**
* @inheritdoc
*/
public function start($readonly = false)
{
// Protection against invalid session cookie names throwing exception: http://php.net/manual/en/function.session-id.php#116836
if (isset($_COOKIE[session_name()]) && !preg_match('/^[-,a-zA-Z0-9]{1,128}$/', $_COOKIE[session_name()])) {
unset($_COOKIE[session_name()]);
}
$options = $this->options;
if ($readonly) {
$options['read_and_close'] = '1';
}
$success = @session_start($options);
if (!$success) {
$last = error_get_last();
$error = $last ? $last['message'] : 'Unknown error';
throw new \RuntimeException('Failed to start session: ' . $error, 500);
}
$params = session_get_cookie_params();
setcookie(
session_name(),
session_id(),
time() + $params['lifetime'],
$params['path'],
$params['domain'],
$params['secure'],
$params['httponly']
);
$this->started = true;
return $this;
}
/**
* @inheritdoc
*/
public function invalidate()
{
$params = session_get_cookie_params();
setcookie(
session_name(),
'',
time() - 42000,
$params['path'],
$params['domain'],
$params['secure'],
$params['httponly']
);
if ($this->isSessionStarted()) {
session_unset();
session_destroy();
}
$this->started = false;
return $this;
}
/**
* @inheritdoc
*/
public function close()
{
if ($this->started) {
session_write_close();
}
$this->started = false;
return $this;
}
/**
* @inheritdoc
*/
public function clear()
{
session_unset();
return $this;
}
/**
* @inheritdoc
*/
public function getAll()
{
return $_SESSION;
}
/**
* @inheritdoc
*/
public function getIterator()
{
return new \ArrayIterator($_SESSION);
}
/**
* @inheritdoc
*/
public function isStarted()
{
return $this->started;
}
/**
* @inheritdoc
*/
public function __isset($name)
{
return isset($_SESSION[$name]);
}
/**
* @inheritdoc
*/
public function __get($name)
{
return isset($_SESSION[$name]) ? $_SESSION[$name] : null;
}
/**
* @inheritdoc
*/
public function __set($name, $value)
{
$_SESSION[$name] = $value;
}
/**
* @inheritdoc
*/
public function __unset($name)
{
unset($_SESSION[$name]);
}
/**
* http://php.net/manual/en/function.session-status.php#113468
* Check if session is started nicely.
* @return bool
*/
protected function isSessionStarted()
{
return \PHP_SAPI !== 'cli' ? \PHP_SESSION_ACTIVE === session_status() : false;
}
/**
* @param string $key
* @param mixed $value
*/
protected function ini_set($key, $value)
{
if (!is_string($value)) {
if (is_bool($value)) {
$value = $value ? '1' : '0';
}
$value = (string)$value;
}
$this->options[$key] = $value;
ini_set($key, $value);
}
}
@@ -0,0 +1,147 @@
<?php
/**
* @package Grav\Framework\Session
*
* @copyright Copyright (C) 2015 - 2018 Trilby Media, LLC. All rights reserved.
* @license MIT License; see LICENSE file for details.
*/
namespace Grav\Framework\Session;
/**
* Class Session
* @package Grav\Framework\Session
*/
interface SessionInterface extends \IteratorAggregate
{
/**
* Get current session instance.
*
* @return Session
* @throws \RuntimeException
*/
public static function getInstance();
/**
* Get session ID
*
* @return string|null Session ID
*/
public function getId();
/**
* Set session ID
*
* @param string $id Session ID
*
* @return $this
*/
public function setId($id);
/**
* Get session name
*
* @return string|null
*/
public function getName();
/**
* Set session name
*
* @param string $name
*
* @return $this
*/
public function setName($name);
/**
* Sets session.* ini variables.
*
* @param array $options
*
* @see http://php.net/session.configuration
*/
public function setOptions(array $options);
/**
* Starts the session storage
*
* @param bool $readonly
* @return $this
* @throws \RuntimeException
*/
public function start($readonly = false);
/**
* Invalidates the current session.
*
* @return $this
*/
public function invalidate();
/**
* Force the session to be saved and closed
*
* @return $this
*/
public function close();
/**
* Free all session variables.
*
* @return $this
*/
public function clear();
/**
* Returns all session variables.
*
* @return array
*/
public function getAll();
/**
* Retrieve an external iterator
*
* @return \ArrayIterator Return an ArrayIterator of $_SESSION
*/
public function getIterator();
/**
* Checks if the session was started.
*
* @return Boolean
*/
public function isStarted();
/**
* Checks if session variable is defined.
*
* @param string $name
* @return bool
*/
public function __isset($name);
/**
* Returns session variable.
*
* @param string $name
* @return mixed
*/
public function __get($name);
/**
* Sets session variable.
*
* @param string $name
* @param mixed $value
*/
public function __set($name, $value);
/**
* Removes session variable.
*
* @param string $name
*/
public function __unset($name);
}