diff vendor/symfony/http-foundation/Session/Storage/Handler/AbstractSessionHandler.php @ 14:1fec387a4317

Update Drupal core to 8.5.2 via Composer

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/http-foundation/Session/Storage/Handler/AbstractSessionHandler.php	Mon Apr 23 09:46:53 2018 +0100
@@ -0,0 +1,168 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * 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\Handler;
+
+/**
+ * This abstract session handler provides a generic implementation
+ * of the PHP 7.0 SessionUpdateTimestampHandlerInterface,
+ * enabling strict and lazy session handling.
+ *
+ * @author Nicolas Grekas <[e-mail]>
+ */
+abstract class AbstractSessionHandler implements \SessionHandlerInterface, \SessionUpdateTimestampHandlerInterface
+{
+    private $sessionName;
+    private $prefetchId;
+    private $prefetchData;
+    private $newSessionId;
+    private $igbinaryEmptyData;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function open($savePath, $sessionName)
+    {
+        $this->sessionName = $sessionName;
+        if (!headers_sent() && !ini_get('session.cache_limiter') && '0' !== ini_get('session.cache_limiter')) {
+            header(sprintf('Cache-Control: max-age=%d, private, must-revalidate', 60 * (int) ini_get('session.cache_expire')));
+        }
+
+        return true;
+    }
+
+    /**
+     * @param string $sessionId
+     *
+     * @return string
+     */
+    abstract protected function doRead($sessionId);
+
+    /**
+     * @param string $sessionId
+     * @param string $data
+     *
+     * @return bool
+     */
+    abstract protected function doWrite($sessionId, $data);
+
+    /**
+     * @param string $sessionId
+     *
+     * @return bool
+     */
+    abstract protected function doDestroy($sessionId);
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validateId($sessionId)
+    {
+        $this->prefetchData = $this->read($sessionId);
+        $this->prefetchId = $sessionId;
+
+        return '' !== $this->prefetchData;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read($sessionId)
+    {
+        if (null !== $this->prefetchId) {
+            $prefetchId = $this->prefetchId;
+            $prefetchData = $this->prefetchData;
+            $this->prefetchId = $this->prefetchData = null;
+
+            if ($prefetchId === $sessionId || '' === $prefetchData) {
+                $this->newSessionId = '' === $prefetchData ? $sessionId : null;
+
+                return $prefetchData;
+            }
+        }
+
+        $data = $this->doRead($sessionId);
+        $this->newSessionId = '' === $data ? $sessionId : null;
+        if (\PHP_VERSION_ID < 70000) {
+            $this->prefetchData = $data;
+        }
+
+        return $data;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($sessionId, $data)
+    {
+        if (\PHP_VERSION_ID < 70000 && $this->prefetchData) {
+            $readData = $this->prefetchData;
+            $this->prefetchData = null;
+
+            if ($readData === $data) {
+                return $this->updateTimestamp($sessionId, $data);
+            }
+        }
+        if (null === $this->igbinaryEmptyData) {
+            // see https://github.com/igbinary/igbinary/issues/146
+            $this->igbinaryEmptyData = \function_exists('igbinary_serialize') ? igbinary_serialize(array()) : '';
+        }
+        if ('' === $data || $this->igbinaryEmptyData === $data) {
+            return $this->destroy($sessionId);
+        }
+        $this->newSessionId = null;
+
+        return $this->doWrite($sessionId, $data);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function destroy($sessionId)
+    {
+        if (\PHP_VERSION_ID < 70000) {
+            $this->prefetchData = null;
+        }
+        if (!headers_sent() && ini_get('session.use_cookies')) {
+            if (!$this->sessionName) {
+                throw new \LogicException(sprintf('Session name cannot be empty, did you forget to call "parent::open()" in "%s"?.', get_class($this)));
+            }
+            $sessionCookie = sprintf(' %s=', urlencode($this->sessionName));
+            $sessionCookieWithId = sprintf('%s%s;', $sessionCookie, urlencode($sessionId));
+            $sessionCookieFound = false;
+            $otherCookies = array();
+            foreach (headers_list() as $h) {
+                if (0 !== stripos($h, 'Set-Cookie:')) {
+                    continue;
+                }
+                if (11 === strpos($h, $sessionCookie, 11)) {
+                    $sessionCookieFound = true;
+
+                    if (11 !== strpos($h, $sessionCookieWithId, 11)) {
+                        $otherCookies[] = $h;
+                    }
+                } else {
+                    $otherCookies[] = $h;
+                }
+            }
+            if ($sessionCookieFound) {
+                header_remove('Set-Cookie');
+                foreach ($otherCookies as $h) {
+                    header($h, false);
+                }
+            } else {
+                setcookie($this->sessionName, '', 0, ini_get('session.cookie_path'), ini_get('session.cookie_domain'), ini_get('session.cookie_secure'), ini_get('session.cookie_httponly'));
+            }
+        }
+
+        return $this->newSessionId === $sessionId || $this->doDestroy($sessionId);
+    }
+}