+++ /dev/null
-<?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\Handler;
-
-@trigger_error('The '.__NAMESPACE__.'\LegacyPdoSessionHandler class is deprecated since version 2.6 and will be removed in 3.0. Use the Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler class instead.', E_USER_DEPRECATED);
-
-/**
- * Session handler using a PDO connection to read and write data.
- *
- * Session data is a binary string that can contain non-printable characters like the null byte.
- * For this reason this handler base64 encodes the data to be able to save it in a character column.
- *
- * This version of the PdoSessionHandler does NOT implement locking. So concurrent requests to the
- * same session can result in data loss due to race conditions.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- * @author Michael Williams <michael.williams@funsational.com>
- * @author Tobias Schultze <http://tobion.de>
- *
- * @deprecated since version 2.6, to be removed in 3.0. Use
- * {@link PdoSessionHandler} instead.
- */
-class LegacyPdoSessionHandler implements \SessionHandlerInterface
-{
- /**
- * @var \PDO PDO instance
- */
- private $pdo;
-
- /**
- * @var string Table name
- */
- private $table;
-
- /**
- * @var string Column for session id
- */
- private $idCol;
-
- /**
- * @var string Column for session data
- */
- private $dataCol;
-
- /**
- * @var string Column for timestamp
- */
- private $timeCol;
-
- /**
- * Constructor.
- *
- * List of available options:
- * * db_table: The name of the table [required]
- * * db_id_col: The column where to store the session id [default: sess_id]
- * * db_data_col: The column where to store the session data [default: sess_data]
- * * db_time_col: The column where to store the timestamp [default: sess_time]
- *
- * @param \PDO $pdo A \PDO instance
- * @param array $dbOptions An associative array of DB options
- *
- * @throws \InvalidArgumentException When "db_table" option is not provided
- */
- public function __construct(\PDO $pdo, array $dbOptions = array())
- {
- if (!array_key_exists('db_table', $dbOptions)) {
- throw new \InvalidArgumentException('You must provide the "db_table" option for a PdoSessionStorage.');
- }
- if (\PDO::ERRMODE_EXCEPTION !== $pdo->getAttribute(\PDO::ATTR_ERRMODE)) {
- throw new \InvalidArgumentException(sprintf('"%s" requires PDO error mode attribute be set to throw Exceptions (i.e. $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION))', __CLASS__));
- }
-
- $this->pdo = $pdo;
- $dbOptions = array_merge(array(
- 'db_id_col' => 'sess_id',
- 'db_data_col' => 'sess_data',
- 'db_time_col' => 'sess_time',
- ), $dbOptions);
-
- $this->table = $dbOptions['db_table'];
- $this->idCol = $dbOptions['db_id_col'];
- $this->dataCol = $dbOptions['db_data_col'];
- $this->timeCol = $dbOptions['db_time_col'];
- }
-
- /**
- * {@inheritdoc}
- */
- public function open($savePath, $sessionName)
- {
- return true;
- }
-
- /**
- * {@inheritdoc}
- */
- public function close()
- {
- return true;
- }
-
- /**
- * {@inheritdoc}
- */
- public function destroy($sessionId)
- {
- // delete the record associated with this id
- $sql = "DELETE FROM $this->table WHERE $this->idCol = :id";
-
- try {
- $stmt = $this->pdo->prepare($sql);
- $stmt->bindParam(':id', $sessionId, \PDO::PARAM_STR);
- $stmt->execute();
- } catch (\PDOException $e) {
- throw new \RuntimeException(sprintf('PDOException was thrown when trying to delete a session: %s', $e->getMessage()), 0, $e);
- }
-
- return true;
- }
-
- /**
- * {@inheritdoc}
- */
- public function gc($maxlifetime)
- {
- // delete the session records that have expired
- $sql = "DELETE FROM $this->table WHERE $this->timeCol < :time";
-
- try {
- $stmt = $this->pdo->prepare($sql);
- $stmt->bindValue(':time', time() - $maxlifetime, \PDO::PARAM_INT);
- $stmt->execute();
- } catch (\PDOException $e) {
- throw new \RuntimeException(sprintf('PDOException was thrown when trying to delete expired sessions: %s', $e->getMessage()), 0, $e);
- }
-
- return true;
- }
-
- /**
- * {@inheritdoc}
- */
- public function read($sessionId)
- {
- $sql = "SELECT $this->dataCol FROM $this->table WHERE $this->idCol = :id";
-
- try {
- $stmt = $this->pdo->prepare($sql);
- $stmt->bindParam(':id', $sessionId, \PDO::PARAM_STR);
- $stmt->execute();
-
- // We use fetchAll instead of fetchColumn to make sure the DB cursor gets closed
- $sessionRows = $stmt->fetchAll(\PDO::FETCH_NUM);
-
- if ($sessionRows) {
- return base64_decode($sessionRows[0][0]);
- }
-
- return '';
- } catch (\PDOException $e) {
- throw new \RuntimeException(sprintf('PDOException was thrown when trying to read the session data: %s', $e->getMessage()), 0, $e);
- }
- }
-
- /**
- * {@inheritdoc}
- */
- public function write($sessionId, $data)
- {
- $encoded = base64_encode($data);
-
- try {
- // We use a single MERGE SQL query when supported by the database.
- $mergeSql = $this->getMergeSql();
-
- if (null !== $mergeSql) {
- $mergeStmt = $this->pdo->prepare($mergeSql);
- $mergeStmt->bindParam(':id', $sessionId, \PDO::PARAM_STR);
- $mergeStmt->bindParam(':data', $encoded, \PDO::PARAM_STR);
- $mergeStmt->bindValue(':time', time(), \PDO::PARAM_INT);
- $mergeStmt->execute();
-
- return true;
- }
-
- $updateStmt = $this->pdo->prepare(
- "UPDATE $this->table SET $this->dataCol = :data, $this->timeCol = :time WHERE $this->idCol = :id"
- );
- $updateStmt->bindParam(':id', $sessionId, \PDO::PARAM_STR);
- $updateStmt->bindParam(':data', $encoded, \PDO::PARAM_STR);
- $updateStmt->bindValue(':time', time(), \PDO::PARAM_INT);
- $updateStmt->execute();
-
- // When MERGE is not supported, like in Postgres, we have to use this approach that can result in
- // duplicate key errors when the same session is written simultaneously. We can just catch such an
- // error and re-execute the update. This is similar to a serializable transaction with retry logic
- // on serialization failures but without the overhead and without possible false positives due to
- // longer gap locking.
- if (!$updateStmt->rowCount()) {
- try {
- $insertStmt = $this->pdo->prepare(
- "INSERT INTO $this->table ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time)"
- );
- $insertStmt->bindParam(':id', $sessionId, \PDO::PARAM_STR);
- $insertStmt->bindParam(':data', $encoded, \PDO::PARAM_STR);
- $insertStmt->bindValue(':time', time(), \PDO::PARAM_INT);
- $insertStmt->execute();
- } catch (\PDOException $e) {
- // Handle integrity violation SQLSTATE 23000 (or a subclass like 23505 in Postgres) for duplicate keys
- if (0 === strpos($e->getCode(), '23')) {
- $updateStmt->execute();
- } else {
- throw $e;
- }
- }
- }
- } catch (\PDOException $e) {
- throw new \RuntimeException(sprintf('PDOException was thrown when trying to write the session data: %s', $e->getMessage()), 0, $e);
- }
-
- return true;
- }
-
- /**
- * Returns a merge/upsert (i.e. insert or update) SQL query when supported by the database.
- *
- * @return string|null The SQL string or null when not supported
- */
- private function getMergeSql()
- {
- $driver = $this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME);
-
- switch ($driver) {
- case 'mysql':
- return "INSERT INTO $this->table ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) ".
- "ON DUPLICATE KEY UPDATE $this->dataCol = VALUES($this->dataCol), $this->timeCol = VALUES($this->timeCol)";
- case 'oci':
- // DUAL is Oracle specific dummy table
- return "MERGE INTO $this->table USING DUAL ON ($this->idCol = :id) ".
- "WHEN NOT MATCHED THEN INSERT ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) ".
- "WHEN MATCHED THEN UPDATE SET $this->dataCol = :data, $this->timeCol = :time";
- case 'sqlsrv' === $driver && version_compare($this->pdo->getAttribute(\PDO::ATTR_SERVER_VERSION), '10', '>='):
- // MERGE is only available since SQL Server 2008 and must be terminated by semicolon
- // It also requires HOLDLOCK according to http://weblogs.sqlteam.com/dang/archive/2009/01/31/UPSERT-Race-Condition-With-MERGE.aspx
- return "MERGE INTO $this->table WITH (HOLDLOCK) USING (SELECT 1 AS dummy) AS src ON ($this->idCol = :id) ".
- "WHEN NOT MATCHED THEN INSERT ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) ".
- "WHEN MATCHED THEN UPDATE SET $this->dataCol = :data, $this->timeCol = :time;";
- case 'sqlite':
- return "INSERT OR REPLACE INTO $this->table ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time)";
- }
- }
-
- /**
- * Return a PDO instance.
- *
- * @return \PDO
- */
- protected function getConnection()
- {
- return $this->pdo;
- }
-}
projects / yaffs-website / blobdiff