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Symfony Profiler
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation\Session\Storage ;
use Symfony\Component\HttpFoundation\Session\SessionBagInterface ;
use Symfony\Component\HttpFoundation\Session\SessionUtils ;
use Symfony\Component\HttpFoundation\Session\Storage\Handler\StrictSessionHandler ;
use Symfony\Component\HttpFoundation\Session\Storage\Proxy\AbstractProxy ;
use Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy ;
// Help opcache.preload discover always-needed symbols
class_exists ( MetadataBag ::class);
class_exists ( StrictSessionHandler ::class);
class_exists ( SessionHandlerProxy ::class);
/**
* This provides a base class for session attribute storage.
*
* @author Drak <drak@zikula.org>
*/
class NativeSessionStorage implements SessionStorageInterface
{
/**
* @var SessionBagInterface[]
*/
protected $bags = [];
/**
* @var bool
*/
protected $started = false ;
/**
* @var bool
*/
protected $closed = false ;
/**
* @var AbstractProxy|\SessionHandlerInterface
*/
protected $saveHandler ;
/**
* @var MetadataBag
*/
protected $metadataBag ;
/**
* @var string|null
*/
private $emulateSameSite ;
/**
* Depending on how you want the storage driver to behave you probably
* want to override this constructor entirely.
*
* List of options for $options array with their defaults.
*
* @see https://php.net/session.configuration for options
* but we omit 'session.' from the beginning of the keys for convenience.
*
* ("auto_start", is not supported as it tells PHP to start a session before
* PHP starts to execute user-land code. Setting during runtime has no effect).
*
* cache_limiter, "" (use "0" to prevent headers from being sent entirely).
* cache_expire, "0"
* cookie_domain, ""
* cookie_httponly, ""
* cookie_lifetime, "0"
* cookie_path, "/"
* cookie_secure, ""
* cookie_samesite, null
* gc_divisor, "100"
* gc_maxlifetime, "1440"
* gc_probability, "1"
* lazy_write, "1"
* name, "PHPSESSID"
* referer_check, ""
* serialize_handler, "php"
* use_strict_mode, "1"
* use_cookies, "1"
* use_only_cookies, "1"
* use_trans_sid, "0"
* sid_length, "32"
* sid_bits_per_character, "5"
* trans_sid_hosts, $_SERVER['HTTP_HOST']
* trans_sid_tags, "a=href,area=href,frame=src,form="
*
* @param AbstractProxy|\SessionHandlerInterface|null $handler
*/
public function __construct (array $options = [], $handler = null , MetadataBag $metaBag = null )
{
if (! \extension_loaded ( 'session' )) {
throw new \LogicException ( 'PHP extension "session" is required.' );
}
$options += [
'cache_limiter' => '' ,
'cache_expire' => 0 ,
'use_cookies' => 1 ,
'lazy_write' => 1 ,
'use_strict_mode' => 1 ,
];
session_register_shutdown ();
$this -> setMetadataBag ( $metaBag );
$this -> setOptions ( $options );
$this -> setSaveHandler ( $handler );
}
/**
* Gets the save handler instance.
*
* @return AbstractProxy|\SessionHandlerInterface
*/
public function getSaveHandler ()
{
return $this -> saveHandler ;
}
/**
* {@inheritdoc}
*/
public function start ()
{
if ( $this -> started ) {
return true ;
}
if ( \PHP_SESSION_ACTIVE === session_status ()) {
throw new \RuntimeException ( 'Failed to start the session: already started by PHP.' );
}
if ( filter_var ( ini_get ( 'session.use_cookies' ), \FILTER_VALIDATE_BOOLEAN ) && headers_sent ( $file , $line )) {
throw new \RuntimeException ( sprintf ( 'Failed to start the session because headers have already been sent by "%s" at line %d.' , $file , $line ));
}
// ok to try and start the session
if (! session_start ()) {
throw new \RuntimeException ( 'Failed to start the session.' );
}
if ( null !== $this -> emulateSameSite ) {
$originalCookie = SessionUtils :: popSessionCookie ( session_name (), session_id ());
if ( null !== $originalCookie ) {
header ( sprintf ( '%s; SameSite=%s' , $originalCookie , $this -> emulateSameSite ), false );
}
}
$this -> loadSession ();
return true ;
}
/**
* {@inheritdoc}
*/
public function getId ()
{
return $this -> saveHandler -> getId ();
}
/**
* {@inheritdoc}
*/
public function setId ( string $id )
{
$this -> saveHandler -> setId ( $id );
}
/**
* {@inheritdoc}
*/
public function getName ()
{
return $this -> saveHandler -> getName ();
}
/**
* {@inheritdoc}
*/
public function setName ( string $name )
{
$this -> saveHandler -> setName ( $name );
}
/**
* {@inheritdoc}
*/
public function regenerate ( bool $destroy = false , int $lifetime = null )
{
// Cannot regenerate the session ID for non-active sessions.
if ( \PHP_SESSION_ACTIVE !== session_status ()) {
return false ;
}
if ( headers_sent ()) {
return false ;
}
if ( null !== $lifetime && $lifetime != ini_get ( 'session.cookie_lifetime' )) {
$this -> save ();
ini_set ( 'session.cookie_lifetime' , $lifetime );
$this -> start ();
}
if ( $destroy ) {
$this -> metadataBag -> stampNew ();
}
$isRegenerated = session_regenerate_id ( $destroy );
if ( null !== $this -> emulateSameSite ) {
$originalCookie = SessionUtils :: popSessionCookie ( session_name (), session_id ());
if ( null !== $originalCookie ) {
header ( sprintf ( '%s; SameSite=%s' , $originalCookie , $this -> emulateSameSite ), false );
}
}
return $isRegenerated ;
}
/**
* {@inheritdoc}
*/
public function save ()
{
// Store a copy so we can restore the bags in case the session was not left empty
$session = $_SESSION ;
foreach ( $this -> bags as $bag ) {
if (empty( $_SESSION [ $key = $bag -> getStorageKey ()])) {
unset( $_SESSION [ $key ]);
}
}
if ([ $key = $this -> metadataBag -> getStorageKey ()] === array_keys ( $_SESSION )) {
unset( $_SESSION [ $key ]);
}
// Register error handler to add information about the current save handler
$previousHandler = set_error_handler (function ( $type , $msg , $file , $line ) use (& $previousHandler ) {
if ( \E_WARNING === $type && str_starts_with ( $msg , 'session_write_close():' )) {
$handler = $this -> saveHandler instanceof SessionHandlerProxy ? $this -> saveHandler -> getHandler () : $this -> saveHandler ;
$msg = sprintf ( 'session_write_close(): Failed to write session data with "%s" handler' , \get_class ( $handler ));
}
return $previousHandler ? $previousHandler ( $type , $msg , $file , $line ) : false ;
});
try {
session_write_close ();
} finally {
restore_error_handler ();
// Restore only if not empty
if ( $_SESSION ) {
$_SESSION = $session ;
}
}
$this -> closed = true ;
$this -> started = false ;
}
/**
* {@inheritdoc}
*/
public function clear ()
{
// clear out the bags
foreach ( $this -> bags as $bag ) {
$bag -> clear ();
}
// clear out the session
$_SESSION = [];
// reconnect the bags to the session
$this -> loadSession ();
}
/**
* {@inheritdoc}
*/
public function registerBag ( SessionBagInterface $bag )
{
if ( $this -> started ) {
throw new \LogicException ( 'Cannot register a bag when the session is already started.' );
}
$this -> bags [ $bag -> getName ()] = $bag ;
}
/**
* {@inheritdoc}
*/
public function getBag ( string $name )
{
if (!isset( $this -> bags [ $name ])) {
throw new \InvalidArgumentException ( sprintf ( 'The SessionBagInterface "%s" is not registered.' , $name ));
}
if (! $this -> started && $this -> saveHandler -> isActive ()) {
$this -> loadSession ();
} elseif (! $this -> started ) {
$this -> start ();
}
return $this -> bags [ $name ];
}
public function setMetadataBag ( MetadataBag $metaBag = null )
{
if ( null === $metaBag ) {
$metaBag = new MetadataBag ();
}
$this -> metadataBag = $metaBag ;
}
/**
* Gets the MetadataBag.
*
* @return MetadataBag
*/
public function getMetadataBag ()
{
return $this -> metadataBag ;
}
/**
* {@inheritdoc}
*/
public function isStarted ()
{
return $this -> started ;
}
/**
* Sets session.* ini variables.
*
* For convenience we omit 'session.' from the beginning of the keys.
* Explicitly ignores other ini keys.
*
* @param array $options Session ini directives [key => value]
*
* @see https://php.net/session.configuration
*/
public function setOptions (array $options )
{
if ( headers_sent () || \PHP_SESSION_ACTIVE === session_status ()) {
return;
}
$validOptions = array_flip ([
'cache_expire' , 'cache_limiter' , 'cookie_domain' , 'cookie_httponly' ,
'cookie_lifetime' , 'cookie_path' , 'cookie_secure' , 'cookie_samesite' ,
'gc_divisor' , 'gc_maxlifetime' , 'gc_probability' ,
'lazy_write' , 'name' , 'referer_check' ,
'serialize_handler' , 'use_strict_mode' , 'use_cookies' ,
'use_only_cookies' , 'use_trans_sid' , 'upload_progress.enabled' ,
'upload_progress.cleanup' , 'upload_progress.prefix' , 'upload_progress.name' ,
'upload_progress.freq' , 'upload_progress.min_freq' , 'url_rewriter.tags' ,
'sid_length' , 'sid_bits_per_character' , 'trans_sid_hosts' , 'trans_sid_tags' ,
]);
foreach ( $options as $key => $value ) {
if (isset( $validOptions [ $key ])) {
if ( str_starts_with ( $key , 'upload_progress.' )) {
trigger_deprecation ( 'symfony/http-foundation' , '5.4' , 'Support for the "%s" session option is deprecated. The settings prefixed with "session.upload_progress." can not be changed at runtime.' , $key );
continue;
}
if ( 'url_rewriter.tags' === $key ) {
trigger_deprecation ( 'symfony/http-foundation' , '5.4' , 'Support for the "%s" session option is deprecated. Use "trans_sid_tags" instead.' , $key );
}
if ( 'cookie_samesite' === $key && \PHP_VERSION_ID < 70300 ) {
// PHP < 7.3 does not support same_site cookies. We will emulate it in
// the start() method instead.
$this -> emulateSameSite = $value ;
continue;
}
if ( 'cookie_secure' === $key && 'auto' === $value ) {
continue;
}
ini_set ( 'url_rewriter.tags' !== $key ? 'session.' . $key : $key , $value );
}
}
}
/**
* Registers session save handler as a PHP session handler.
*
* To use internal PHP session save handlers, override this method using ini_set with
* session.save_handler and session.save_path e.g.
*
* ini_set('session.save_handler', 'files');
* ini_set('session.save_path', '/tmp');
*
* or pass in a \SessionHandler instance which configures session.save_handler in the
* constructor, for a template see NativeFileSessionHandler.
*
* @see https://php.net/session-set-save-handler
* @see https://php.net/sessionhandlerinterface
* @see https://php.net/sessionhandler
*
* @param AbstractProxy|\SessionHandlerInterface|null $saveHandler
*
* @throws \InvalidArgumentException
*/
public function setSaveHandler ( $saveHandler = null )
{
if (! $saveHandler instanceof AbstractProxy &&
! $saveHandler instanceof \SessionHandlerInterface &&
null !== $saveHandler ) {
throw new \InvalidArgumentException ( 'Must be instance of AbstractProxy; implement \SessionHandlerInterface; or be null.' );
}
// Wrap $saveHandler in proxy and prevent double wrapping of proxy
if (! $saveHandler instanceof AbstractProxy && $saveHandler instanceof \SessionHandlerInterface ) {
$saveHandler = new SessionHandlerProxy ( $saveHandler );
} elseif (! $saveHandler instanceof AbstractProxy ) {
$saveHandler = new SessionHandlerProxy (new StrictSessionHandler (new \SessionHandler ()));
}
$this -> saveHandler = $saveHandler ;
if ( headers_sent () || \PHP_SESSION_ACTIVE === session_status ()) {
return;
}
if ( $this -> saveHandler instanceof SessionHandlerProxy ) {
session_set_save_handler ( $this -> saveHandler , false );
}
}
/**
* Load the session with attributes.
*
* After starting the session, PHP retrieves the session from whatever handlers
* are set to (either PHP's internal, or a custom save handler set with session_set_save_handler()).
* PHP takes the return value from the read() handler, unserializes it
* and populates $_SESSION with the result automatically.
*/
protected function loadSession (array & $session = null )
{
if ( null === $session ) {
$session = & $_SESSION ;
}
$bags = array_merge ( $this -> bags , [ $this -> metadataBag ]);
foreach ( $bags as $bag ) {
$key = $bag -> getStorageKey ();
$session [ $key ] = isset( $session [ $key ]) && \is_array ( $session [ $key ]) ? $session [ $key ] : [];
$bag -> initialize ( $session [ $key ]);
}
$this -> started = true ;
$this -> closed = false ;
}
}