PDF rausgenommen

msd2/tracking/piwik/core/Session/SaveHandler/DbTable.php

@@ -0,0 +1,199 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik\Session\SaveHandler;
+
+use Piwik\Common;
+use Piwik\Db;
+use Piwik\DbHelper;
+use Exception;
+use Piwik\Updater\Migration;
+use Zend_Session;
+use Zend_Session_SaveHandler_Interface;
+
+/**
+ * Database-backed session save handler
+ *
+ */
+class DbTable implements Zend_Session_SaveHandler_Interface
+{
+    protected $config;
+    protected $maxLifetime;
+
+    const TABLE_NAME = 'session';
+
+    /**
+     * @param array $config
+     */
+    public function __construct($config)
+    {
+        $this->config = $config;
+        $this->maxLifetime = ini_get('session.gc_maxlifetime');
+    }
+
+    /**
+     * Destructor
+     *
+     * @return void
+     */
+    public function __destruct()
+    {
+        Zend_Session::writeClose();
+    }
+
+    /**
+     * Open Session - retrieve resources
+     *
+     * @param string $save_path
+     * @param string $name
+     * @return boolean
+     */
+    public function open($save_path, $name)
+    {
+        Db::get()->getConnection();
+
+        return true;
+    }
+
+    /**
+     * Close Session - free resources
+     *
+     * @return boolean
+     */
+    public function close()
+    {
+        return true;
+    }
+
+    /**
+     * Read session data
+     *
+     * @param string $id
+     * @return string
+     */
+    public function read($id)
+    {
+        $sql = 'SELECT ' . $this->config['dataColumn'] . ' FROM ' . $this->config['name']
+            . ' WHERE ' . $this->config['primary'] . ' = ?'
+            . ' AND ' . $this->config['modifiedColumn'] . ' + ' . $this->config['lifetimeColumn'] . ' >= ?';
+
+        $result = $this->fetchOne($sql, array($id, time()));
+
+        if (!$result) {
+            $result = '';
+        }
+
+        return $result;
+    }
+
+    private function fetchOne($sql, $bind)
+    {
+        try {
+            $result = Db::get()->fetchOne($sql, $bind);
+        } catch (Exception $e) {
+            if (Db::get()->isErrNo($e, Migration\Db::ERROR_CODE_TABLE_NOT_EXISTS)) {
+                $this->migrateToDbSessionTable();
+                $result = Db::get()->fetchOne($sql, $bind);
+            } else {
+                throw $e;
+            }
+        }
+        return $result;
+    }
+
+    private function query($sql, $bind)
+    {
+        try {
+            $result = Db::get()->query($sql, $bind);
+        } catch (Exception $e) {
+            if (Db::get()->isErrNo($e, Migration\Db::ERROR_CODE_TABLE_NOT_EXISTS)) {
+                $this->migrateToDbSessionTable();
+                $result = Db::get()->query($sql, $bind);
+            } else {
+                throw $e;
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * Write Session - commit data to resource
+     *
+     * @param string $id
+     * @param mixed $data
+     * @return boolean
+     */
+    public function write($id, $data)
+    {
+        $sql = 'INSERT INTO ' . $this->config['name']
+            . ' (' . $this->config['primary'] . ','
+            . $this->config['modifiedColumn'] . ','
+            . $this->config['lifetimeColumn'] . ','
+            . $this->config['dataColumn'] . ')'
+            . ' VALUES (?,?,?,?)'
+            . ' ON DUPLICATE KEY UPDATE '
+            . $this->config['modifiedColumn'] . ' = ?,'
+            . $this->config['lifetimeColumn'] . ' = ?,'
+            . $this->config['dataColumn'] . ' = ?';
+
+        $this->query($sql, array($id, time(), $this->maxLifetime, $data, time(), $this->maxLifetime, $data));
+
+        return true;
+    }
+
+    /**
+     * Destroy Session - remove data from resource for
+     * given session id
+     *
+     * @param string $id
+     * @return boolean
+     */
+    public function destroy($id)
+    {
+        $sql = 'DELETE FROM ' . $this->config['name'] . ' WHERE ' . $this->config['primary'] . ' = ?';
+
+        $this->query($sql, array($id));
+
+        return true;
+    }
+
+    /**
+     * Garbage Collection - remove old session data older
+     * than $maxlifetime (in seconds)
+     *
+     * @param int $maxlifetime timestamp in seconds
+     * @return bool  always true
+     */
+    public function gc($maxlifetime)
+    {
+        $sql = 'DELETE FROM ' . $this->config['name']
+            . ' WHERE ' . $this->config['modifiedColumn'] . ' + ' . $this->config['lifetimeColumn'] . ' < ?';
+
+        $this->query($sql, array(time()));
+
+        return true;
+    }
+
+    private function migrateToDbSessionTable()
+    {
+        // happens when updating from Piwik 1.4 or earlier to Matomo 3.7+
+        // in this case on update it will change the session handler to dbtable, but it hasn't performed
+        // the DB updates just yet which means the session table won't be available as it was only added in
+        // Piwik 1.5 => results in a sql error the session table does not exist
+        try {
+            $sql = DbHelper::getTableCreateSql(self::TABLE_NAME);
+            Db::query($sql);
+        } catch (Exception $e) {
+            if (!Db::get()->isErrNo($e, Migration\Db::ERROR_CODE_TABLE_EXISTS)) {
+                throw $e;
+            }
+        }
+    }
+
+}