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<?php |
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namespace PHPDaemon\Traits; |
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use PHPDaemon\Core\CallbackWrapper; |
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use PHPDaemon\Core\Daemon; |
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use PHPDaemon\FS\FileSystem; |
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/** |
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* Sessions |
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* @package PHPDaemon\Traits |
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* @author Vasily Zorin <[email protected]> |
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*/ |
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trait Sessions |
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{ |
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/** |
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* @var string Session ID |
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*/ |
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protected $sessionId; |
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/** |
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* @var integer |
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*/ |
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protected $sessionStartTimeout = 10; |
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/** |
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* @var boolean |
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*/ |
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protected $sessionStarted = false; |
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/** |
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* @var boolean |
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*/ |
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protected $sessionFlushing = false; |
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/** |
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* @var resource |
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*/ |
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protected $sessionFp; |
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/** |
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* @var string |
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*/ |
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protected $sessionPrefix = 'sess_'; |
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/** |
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* Is session started? |
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* @return boolean |
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*/ |
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public function sessionStarted() |
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{ |
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return $this->sessionStarted; |
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} |
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/** |
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* Deferred event 'onSessionStart' |
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* @return callable |
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*/ |
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public function onSessionStartEvent() |
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{ |
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return function ($sessionStartEvent) { |
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/** @var \PHPDaemon\Core\DeferredEvent $sessionStartEvent */ |
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$name = ini_get('session.name'); |
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$sid = $this->getCookieStr($name); |
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if ($sid === '') { |
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$this->sessionStartNew(function ($success) use ($sessionStartEvent) { |
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$sessionStartEvent->setResult($success); |
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}); |
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return; |
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} |
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$this->onSessionRead(function ($session) use ($sessionStartEvent) { |
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if ($this->getSessionState() === null) { |
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$this->sessionStartNew(function ($success) use ($sessionStartEvent) { |
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$sessionStartEvent->setResult($success); |
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}); |
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return; |
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} |
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$sessionStartEvent->setResult(true); |
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}); |
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}; |
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} |
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/** |
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* Deferred event 'onSessionRead' |
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* @return callable |
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*/ |
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public function onSessionReadEvent() |
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{ |
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return function ($sessionEvent) { |
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/** @var \PHPDaemon\Core\DeferredEvent $sessionEvent */ |
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$name = ini_get('session.name'); |
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$sid = $this->getCookieStr($name); |
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if ($sid === '') { |
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$sessionEvent->setResult(false); |
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return; |
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} |
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if ($this->getSessionState() !== null) { |
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$sessionEvent->setResult(true); |
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return; |
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} |
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$this->sessionRead($sid, function ($data) use ($sessionEvent, $sid) { |
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$canDecode = $data !== false && $this->sessionDecode($data); |
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$sessionEvent->setResult($canDecode); |
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}); |
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}; |
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} |
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/** |
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* Reads session data |
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* @param string $sid Session ID |
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* @param callable $cb Callback |
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* @return void |
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*/ |
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public function sessionRead($sid, $cb = null) |
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{ |
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FileSystem::open(FileSystem::genRndTempnamPrefix(session_save_path(), $this->sessionPrefix) . basename($sid), |
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'r+!', function ($fp) use ($cb) { |
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if (!$fp) { |
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$cb(false); |
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return; |
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} |
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$fp->readAll(function ($fp, $data) use ($cb) { |
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$this->sessionFp = $fp; |
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$cb($data); |
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}); |
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}); |
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} |
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/** |
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* Commmit session data |
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* @param callable $cb Callback |
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* @return void |
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*/ |
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public function sessionCommit($cb = null) |
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{ |
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if (!$this->sessionFp || $this->sessionFlushing) { |
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if ($cb) { |
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$cb(false); |
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} |
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return; |
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} |
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$this->sessionFlushing = true; |
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$data = $this->sessionEncode(); |
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$l = mb_orig_strlen($data); |
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$cb = CallbackWrapper::wrap($cb); |
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$this->sessionFp->write($data, function ($file, $result) use ($l, $cb) { |
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$file->truncate($l, function ($file, $result) use ($cb) { |
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$this->sessionFlushing = false; |
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if ($cb) { |
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$cb(true); |
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} |
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}); |
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}); |
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} |
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/** |
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* Session start |
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* @param boolean $force_start |
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* @return void |
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*/ |
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protected function sessionStart($force_start = true) |
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{ |
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if ($this->sessionStarted) { |
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return; |
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} |
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$this->sessionStarted = true; |
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if (!$this instanceof \PHPDaemon\HTTPRequest\Generic) { |
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Daemon::log('Called ' . get_class($this) . '(trait \PHPDaemon\Traits\Sessions)->sessionStart() outside of Request. You should use onSessionStart.'); |
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return; |
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} |
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$f = true; // hack to avoid a sort of "race condition" |
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$this->onSessionStart(function ($event) use (&$f) { |
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$f = false; |
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$this->wakeup(); |
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}); |
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if ($f) { |
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$this->sleep($this->sessionStartTimeout); |
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} |
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} |
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/** |
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* Start new session |
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* @param callable $cb Callback |
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* @return void |
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*/ |
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protected function sessionStartNew($cb = null) |
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{ |
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FileSystem::tempnam(session_save_path(), $this->sessionPrefix, function ($fp) use ($cb) { |
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if (!$fp) { |
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$cb(false); |
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return; |
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} |
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$this->sessionFp = $fp; |
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$this->sessionId = substr(basename($fp->path), mb_orig_strlen($this->sessionPrefix)); |
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$this->setcookie( |
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ini_get('session.name'), |
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$this->sessionId, |
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ini_get('session.cookie_lifetime'), |
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ini_get('session.cookie_path'), |
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ini_get('session.cookie_domain'), |
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ini_get('session.cookie_secure'), |
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ini_get('session.cookie_httponly') |
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); |
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$cb(true); |
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}); |
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} |
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/** |
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* Encodes session data |
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* @return string|false |
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*/ |
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protected function sessionEncode() |
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{ |
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$type = ini_get('session.serialize_handler'); |
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if ($type === 'php') { |
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return $this->serializePHP($this->getSessionState()); |
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} |
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if ($type === 'php_binary') { |
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return igbinary_serialize($this->getSessionState()); |
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} |
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return false; |
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} |
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/** |
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* Set session state |
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* @param mixed $var |
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* @return void |
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*/ |
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protected function setSessionState($var) |
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{ |
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$this->attrs->session = $var; |
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} |
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/** |
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* Get session state |
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* @return mixed |
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*/ |
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protected function getSessionState() |
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{ |
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return $this->attrs->session; |
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} |
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/** |
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* Decodes session data |
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* @param string $str Data |
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* @return boolean |
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*/ |
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protected function sessionDecode($str) |
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{ |
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$type = ini_get('session.serialize_handler'); |
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if ($type === 'php') { |
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$this->setSessionState($this->unserializePHP($str)); |
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return true; |
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} |
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if ($type === 'php_binary') { |
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$this->setSessionState(igbinary_unserialize($str)); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* session_encode() - clone, which not require session_start() |
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* @see http://www.php.net/manual/en/function.session-encode.php |
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* @param array $array |
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* @return string |
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*/ |
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public function serializePHP($array) |
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{ |
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$raw = ''; |
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$line = 0; |
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$keys = array_keys($array); |
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foreach ($keys as $key) { |
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$value = $array[$key]; |
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$line++; |
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$raw .= $key . '|'; |
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if (is_array($value) && isset($value['huge_recursion_blocker_we_hope'])) { |
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$raw .= 'R:' . $value['huge_recursion_blocker_we_hope'] . ';'; |
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} else { |
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$raw .= serialize($value); |
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} |
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$array[$key] = array('huge_recursion_blocker_we_hope' => $line); |
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} |
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return $raw; |
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} |
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/** |
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* session_decode() - clone, which not require session_start() |
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* @see http://www.php.net/manual/en/function.session-decode.php#108037 |
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* @param string $session_data |
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* @return array |
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*/ |
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protected function unserializePHP($session_data) |
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{ |
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$return_data = array(); |
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$offset = 0; |
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while ($offset < mb_orig_strlen($session_data)) { |
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if (!strstr(substr($session_data, $offset), "|")) { |
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return $return_data; |
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//throw new \Exception("invalid session data, remaining: " . substr($session_data, $offset)); |
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} |
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$pos = mb_orig_strpos($session_data, "|", $offset); |
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$num = $pos - $offset; |
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$varname = substr($session_data, $offset, $num); |
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$offset += $num + 1; |
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$data = unserialize(substr($session_data, $offset)); |
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$return_data[$varname] = $data; |
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$offset += mb_orig_strlen(serialize($data)); |
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} |
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return $return_data; |
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} |
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} |
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This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.