446 lines
12 KiB
PHP
446 lines
12 KiB
PHP
<?php
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/**
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* Library for extracting information about the available storage engines
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*/
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declare(strict_types=1);
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namespace PhpMyAdmin;
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use PhpMyAdmin\Engines\Bdb;
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use PhpMyAdmin\Engines\Berkeleydb;
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use PhpMyAdmin\Engines\Binlog;
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use PhpMyAdmin\Engines\Innobase;
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use PhpMyAdmin\Engines\Innodb;
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use PhpMyAdmin\Engines\Memory;
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use PhpMyAdmin\Engines\Merge;
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use PhpMyAdmin\Engines\MrgMyisam;
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use PhpMyAdmin\Engines\Myisam;
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use PhpMyAdmin\Engines\Ndbcluster;
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use PhpMyAdmin\Engines\Pbxt;
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use PhpMyAdmin\Engines\PerformanceSchema;
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use PhpMyAdmin\Html\Generator;
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use PhpMyAdmin\Utils\SessionCache;
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use function array_key_exists;
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use function define;
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use function explode;
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use function htmlspecialchars;
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use function mb_stripos;
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use function mb_strtolower;
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use function sprintf;
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/**
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* defines
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*/
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define('PMA_ENGINE_SUPPORT_NO', 0);
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define('PMA_ENGINE_SUPPORT_DISABLED', 1);
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define('PMA_ENGINE_SUPPORT_YES', 2);
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define('PMA_ENGINE_SUPPORT_DEFAULT', 3);
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define('PMA_ENGINE_DETAILS_TYPE_PLAINTEXT', 0);
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define('PMA_ENGINE_DETAILS_TYPE_SIZE', 1);
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define('PMA_ENGINE_DETAILS_TYPE_NUMERIC', 2); //Has no effect yet...
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define('PMA_ENGINE_DETAILS_TYPE_BOOLEAN', 3); // 'ON' or 'OFF'
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/**
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* Base Storage Engine Class
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*/
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class StorageEngine
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{
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/** @var string engine name */
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public $engine = 'dummy';
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/** @var string engine title/description */
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public $title = 'PMA Dummy Engine Class';
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/** @var string engine lang description */
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public $comment
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= 'If you read this text inside phpMyAdmin, something went wrong...';
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/** @var int engine supported by current server */
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public $support = PMA_ENGINE_SUPPORT_NO;
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/**
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* @param string $engine The engine ID
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*/
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public function __construct($engine)
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{
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$storage_engines = self::getStorageEngines();
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if (empty($storage_engines[$engine])) {
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return;
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}
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$this->engine = $engine;
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$this->title = $storage_engines[$engine]['Engine'];
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$this->comment = ($storage_engines[$engine]['Comment'] ?? '');
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switch ($storage_engines[$engine]['Support']) {
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case 'DEFAULT':
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$this->support = PMA_ENGINE_SUPPORT_DEFAULT;
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break;
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case 'YES':
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$this->support = PMA_ENGINE_SUPPORT_YES;
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break;
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case 'DISABLED':
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$this->support = PMA_ENGINE_SUPPORT_DISABLED;
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break;
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case 'NO':
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default:
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$this->support = PMA_ENGINE_SUPPORT_NO;
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}
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}
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/**
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* Returns array of storage engines
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*
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* @return array[] array of storage engines
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*
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* @static
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* @staticvar array $storage_engines storage engines
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* @access public
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*/
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public static function getStorageEngines()
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{
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global $dbi;
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static $storage_engines = null;
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if ($storage_engines == null) {
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$storage_engines = $dbi->fetchResult('SHOW STORAGE ENGINES', 'Engine');
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if ($dbi->getVersion() >= 50708) {
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$disabled = (string) SessionCache::get(
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'disabled_storage_engines',
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static function () use ($dbi) {
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return $dbi->fetchValue(
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'SELECT @@disabled_storage_engines'
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);
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}
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);
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foreach (explode(',', $disabled) as $engine) {
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if (! isset($storage_engines[$engine])) {
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continue;
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}
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$storage_engines[$engine]['Support'] = 'DISABLED';
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}
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}
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}
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return $storage_engines;
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}
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/**
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* @return array<int|string, array<string, mixed>>
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*/
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public static function getArray(): array
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{
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$engines = [];
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foreach (self::getStorageEngines() as $details) {
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// Don't show PERFORMANCE_SCHEMA engine (MySQL 5.5)
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if ($details['Support'] === 'NO'
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|| $details['Support'] === 'DISABLED'
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|| $details['Engine'] === 'PERFORMANCE_SCHEMA'
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) {
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continue;
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}
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$engines[$details['Engine']] = [
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'name' => $details['Engine'],
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'comment' => $details['Comment'],
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'is_default' => $details['Support'] === 'DEFAULT',
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];
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}
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return $engines;
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}
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/**
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* Loads the corresponding engine plugin, if available.
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*
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* @param string $engine The engine ID
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*
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* @return StorageEngine The engine plugin
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*
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* @static
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*/
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public static function getEngine($engine)
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{
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switch (mb_strtolower($engine)) {
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case 'bdb':
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return new Bdb($engine);
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case 'berkeleydb':
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return new Berkeleydb($engine);
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case 'binlog':
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return new Binlog($engine);
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case 'innobase':
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return new Innobase($engine);
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case 'innodb':
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return new Innodb($engine);
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case 'memory':
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return new Memory($engine);
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case 'merge':
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return new Merge($engine);
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case 'mrg_myisam':
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return new MrgMyisam($engine);
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case 'myisam':
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return new Myisam($engine);
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case 'ndbcluster':
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return new Ndbcluster($engine);
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case 'pbxt':
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return new Pbxt($engine);
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case 'performance_schema':
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return new PerformanceSchema($engine);
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default:
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return new StorageEngine($engine);
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}
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}
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/**
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* Returns true if given engine name is supported/valid, otherwise false
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*
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* @param string $engine name of engine
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*
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* @return bool whether $engine is valid or not
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*
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* @static
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*/
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public static function isValid($engine)
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{
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if ($engine === 'PBMS') {
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return true;
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}
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$storage_engines = self::getStorageEngines();
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return isset($storage_engines[$engine]);
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}
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/**
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* Returns as HTML table of the engine's server variables
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*
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* @return string The table that was generated based on the retrieved
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* information
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*/
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public function getHtmlVariables()
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{
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$ret = '';
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foreach ($this->getVariablesStatus() as $details) {
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$ret .= '<tr>' . "\n"
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. ' <td>' . "\n";
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if (! empty($details['desc'])) {
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$ret .= ' '
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. Generator::showHint($details['desc'])
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. "\n";
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}
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$ret .= ' </td>' . "\n"
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. ' <th scope="row">' . htmlspecialchars($details['title']) . '</th>'
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. "\n"
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. ' <td class="text-monospace text-right">';
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switch ($details['type']) {
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case PMA_ENGINE_DETAILS_TYPE_SIZE:
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$parsed_size = $this->resolveTypeSize($details['value']);
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$ret .= $parsed_size[0] . ' ' . $parsed_size[1];
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unset($parsed_size);
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break;
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case PMA_ENGINE_DETAILS_TYPE_NUMERIC:
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$ret .= Util::formatNumber($details['value']) . ' ';
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break;
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default:
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$ret .= htmlspecialchars($details['value']) . ' ';
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}
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$ret .= '</td>' . "\n"
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. '</tr>' . "\n";
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}
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if (! $ret) {
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$ret = '<p>' . "\n"
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. ' '
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. __(
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'There is no detailed status information available for this '
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. 'storage engine.'
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)
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. "\n"
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. '</p>' . "\n";
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} else {
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$ret = '<table class="table table-light table-striped table-hover w-auto">'
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. "\n" . $ret . '</table>' . "\n";
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}
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return $ret;
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}
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/**
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* Returns the engine specific handling for
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* PMA_ENGINE_DETAILS_TYPE_SIZE type variables.
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*
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* This function should be overridden when
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* PMA_ENGINE_DETAILS_TYPE_SIZE type needs to be
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* handled differently for a particular engine.
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*
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* @param int $value Value to format
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*
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* @return array the formatted value and its unit
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*/
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public function resolveTypeSize($value)
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{
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return Util::formatByteDown($value);
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}
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/**
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* Returns array with detailed info about engine specific server variables
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*
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* @return array array with detailed info about specific engine server variables
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*/
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public function getVariablesStatus()
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{
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global $dbi;
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$variables = $this->getVariables();
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$like = $this->getVariablesLikePattern();
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if ($like) {
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$like = " LIKE '" . $like . "' ";
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} else {
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$like = '';
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}
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$mysql_vars = [];
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$sql_query = 'SHOW GLOBAL VARIABLES ' . $like . ';';
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$res = $dbi->query($sql_query);
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while ($row = $dbi->fetchAssoc($res)) {
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if (isset($variables[$row['Variable_name']])) {
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$mysql_vars[$row['Variable_name']]
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= $variables[$row['Variable_name']];
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} elseif (! $like
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&& mb_stripos($row['Variable_name'], $this->engine) !== 0
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) {
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continue;
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}
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$mysql_vars[$row['Variable_name']]['value'] = $row['Value'];
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if (empty($mysql_vars[$row['Variable_name']]['title'])) {
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$mysql_vars[$row['Variable_name']]['title'] = $row['Variable_name'];
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}
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if (isset($mysql_vars[$row['Variable_name']]['type'])) {
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continue;
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}
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$mysql_vars[$row['Variable_name']]['type']
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= PMA_ENGINE_DETAILS_TYPE_PLAINTEXT;
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}
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$dbi->freeResult($res);
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return $mysql_vars;
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}
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/**
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* Reveals the engine's title
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*
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* @return string The title
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*/
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public function getTitle()
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{
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return $this->title;
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}
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/**
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* Fetches the server's comment about this engine
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*
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* @return string The comment
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*/
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public function getComment()
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{
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return $this->comment;
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}
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/**
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* Information message on whether this storage engine is supported
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*
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* @return string The localized message.
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*/
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public function getSupportInformationMessage()
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{
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switch ($this->support) {
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case PMA_ENGINE_SUPPORT_DEFAULT:
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$message = __('%s is the default storage engine on this MySQL server.');
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break;
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case PMA_ENGINE_SUPPORT_YES:
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$message = __('%s is available on this MySQL server.');
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break;
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case PMA_ENGINE_SUPPORT_DISABLED:
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$message = __('%s has been disabled for this MySQL server.');
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break;
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case PMA_ENGINE_SUPPORT_NO:
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default:
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$message = __(
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'This MySQL server does not support the %s storage engine.'
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);
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}
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return sprintf($message, htmlspecialchars($this->title));
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}
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/**
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* Generates a list of MySQL variables that provide information about this
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* engine. This function should be overridden when extending this class
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* for a particular engine.
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*
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* @return array The list of variables.
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*/
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public function getVariables()
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{
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return [];
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}
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/**
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* Returns string with filename for the MySQL helppage
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* about this storage engine
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*
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* @return string MySQL help page filename
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*/
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public function getMysqlHelpPage()
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{
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return $this->engine . '-storage-engine';
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}
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/**
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* Returns the pattern to be used in the query for SQL variables
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* related to the storage engine
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*
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* @return string SQL query LIKE pattern
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*/
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public function getVariablesLikePattern()
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{
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return '';
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}
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/**
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* Returns a list of available information pages with labels
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*
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* @return string[] The list
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*/
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public function getInfoPages()
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{
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return [];
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}
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/**
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* Generates the requested information page
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*
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* @param string $id page id
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*
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* @return string html output
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*/
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public function getPage($id)
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{
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if (! array_key_exists($id, $this->getInfoPages())) {
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return '';
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}
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$id = 'getPage' . $id;
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return $this->$id();
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}
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}
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