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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Holds the PhpMyAdmin\Controllers\Server\VariablesController
*
* @package PhpMyAdmin\Controllers
*/
declare(strict_types=1);
namespace PhpMyAdmin\Controllers\Server;
use PhpMyAdmin\Controllers\AbstractController;
use PhpMyAdmin\Util;
use Williamdes\MariaDBMySQLKBS\KBException;
use Williamdes\MariaDBMySQLKBS\Search as KBSearch;
/**
* Handles viewing and editing server variables
*
* @package PhpMyAdmin\Controllers
*/
class VariablesController extends AbstractController
{
/**
* Index action
*
* @param array $params Request parameters
*
* @return string
*/
public function index(array $params): string
{
include ROOT_PATH . 'libraries/server_common.inc.php';
$filterValue = ! empty($params['filter']) ? $params['filter'] : '';
$header = $this->response->getHeader();
$scripts = $header->getScripts();
$scripts->addFile('server/variables.js');
$variables = [];
$serverVarsResult = $this->dbi->tryQuery('SHOW SESSION VARIABLES;');
if ($serverVarsResult !== false) {
$serverVarsSession = [];
while ($arr = $this->dbi->fetchRow($serverVarsResult)) {
$serverVarsSession[$arr[0]] = $arr[1];
}
$this->dbi->freeResult($serverVarsResult);
$serverVars = $this->dbi->fetchResult('SHOW GLOBAL VARIABLES;', 0, 1);
// list of static (i.e. non-editable) system variables
$staticVariables = KBSearch::getStaticVariables();
foreach ($serverVars as $name => $value) {
$hasSessionValue = isset($serverVarsSession[$name])
&& $serverVarsSession[$name] !== $value;
$docLink = Util::linkToVarDocumentation(
$name,
$this->dbi->isMariaDB(),
str_replace('_', ' ', $name)
);
list($formattedValue, $isEscaped) = $this->formatVariable($name, $value);
if ($hasSessionValue) {
list($sessionFormattedValue, ) = $this->formatVariable(
$name,
$serverVarsSession[$name]
);
}
$variables[] = [
'name' => $name,
'is_editable' => ! in_array(strtolower($name), $staticVariables),
'doc_link' => $docLink,
'value' => $formattedValue,
'is_escaped' => $isEscaped,
'has_session_value' => $hasSessionValue,
'session_value' => $sessionFormattedValue ?? null,
];
}
}
return $this->template->render('server/variables/index', [
'variables' => $variables,
'filter_value' => $filterValue,
'is_superuser' => $this->dbi->isSuperuser(),
'is_mariadb' => $this->dbi->isMariaDB(),
]);
}
/**
* Handle the AJAX request for a single variable value
*
* @param array $params Request parameters
*
* @return array
*/
public function getValue(array $params): array
{
// Send with correct charset
header('Content-Type: text/html; charset=UTF-8');
// Do not use double quotes inside the query to avoid a problem
// when server is running in ANSI_QUOTES sql_mode
$varValue = $this->dbi->fetchSingleRow(
'SHOW GLOBAL VARIABLES WHERE Variable_name=\''
. $this->dbi->escapeString($params['varName']) . '\';',
'NUM'
);
$json = [];
try {
$type = KBSearch::getVariableType($params['varName']);
if ($type === 'byte') {
$json['message'] = implode(
' ',
Util::formatByteDown($varValue[1], 3, 3)
);
} else {
throw new KBException("Not a type=byte");
}
} catch (KBException $e) {
$json['message'] = $varValue[1];
}
return $json;
}
/**
* Handle the AJAX request for setting value for a single variable
*
* @param array $params Request parameters
*
* @return array
*/
public function setValue(array $params): array
{
$value = $params['varValue'];
$matches = [];
try {
$type = KBSearch::getVariableType($params['varName']);
if ($type === 'byte' && preg_match(
'/^\s*(\d+(\.\d+)?)\s*(mb|kb|mib|kib|gb|gib)\s*$/i',
$value,
$matches
)) {
$exp = [
'kb' => 1,
'kib' => 1,
'mb' => 2,
'mib' => 2,
'gb' => 3,
'gib' => 3,
];
$value = floatval($matches[1]) * pow(
1024,
$exp[mb_strtolower($matches[3])]
);
} else {
throw new KBException("Not a type=byte or regex not matching");
}
} catch (KBException $e) {
$value = $this->dbi->escapeString($value);
}
if (! is_numeric($value)) {
$value = "'" . $value . "'";
}
$json = [];
if (! preg_match("/[^a-zA-Z0-9_]+/", $params['varName'])
&& $this->dbi->query(
'SET GLOBAL ' . $params['varName'] . ' = ' . $value
)
) {
// Some values are rounded down etc.
$varValue = $this->dbi->fetchSingleRow(
'SHOW GLOBAL VARIABLES WHERE Variable_name="'
. $this->dbi->escapeString($params['varName'])
. '";',
'NUM'
);
list($formattedValue, $isHtmlFormatted) = $this->formatVariable(
$params['varName'],
$varValue[1]
);
if ($isHtmlFormatted === false) {
$json['variable'] = htmlspecialchars($formattedValue);
} else {
$json['variable'] = $formattedValue;
}
} else {
$this->response->setRequestStatus(false);
$json['error'] = __('Setting variable failed');
}
return $json;
}
/**
* Format Variable
*
* @param string $name variable name
* @param integer $value variable value
*
* @return array formatted string and bool if string is HTML formatted
*/
private function formatVariable($name, $value)
{
$isHtmlFormatted = false;
$formattedValue = $value;
if (is_numeric($value)) {
try {
$type = KBSearch::getVariableType($name);
if ($type === 'byte') {
$isHtmlFormatted = true;
$formattedValue = '<abbr title="'
. htmlspecialchars(Util::formatNumber($value, 0)) . '">'
. htmlspecialchars(
implode(' ', Util::formatByteDown($value, 3, 3))
)
. '</abbr>';
} else {
throw new KBException("Not a type=byte or regex not matching");
}
} catch (KBException $e) {
$formattedValue = Util::formatNumber($value, 0);
}
}
return [
$formattedValue,
$isHtmlFormatted,
];
}
}
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