CasperSecurity
<?php
/**
* PhpMyAdmin\Server\Status\Data class
* Used by server_status_*.php pages
*/
declare(strict_types=1);
namespace PhpMyAdmin\Server\Status;
use PhpMyAdmin\ReplicationInfo;
use PhpMyAdmin\Url;
use function basename;
use function mb_strpos;
use function mb_strtolower;
/**
* This class provides data about the server status
*
* All properties of the class are read-only
*
* TODO: Use lazy initialisation for some of the properties
* since not all of the server_status_*.php pages need
* all the data that this class provides.
*/
class Data
{
/** @var array */
public $status;
/** @var array */
public $sections;
/** @var array */
public $variables;
/** @var array */
public $usedQueries;
/** @var array */
public $allocationMap;
/** @var array */
public $links;
/** @var bool */
public $dbIsLocal;
/** @var mixed */
public $section;
/** @var array */
public $sectionUsed;
/** @var string */
public $selfUrl;
/** @var bool */
public $dataLoaded;
/** @var ReplicationInfo */
private $replicationInfo;
public function getReplicationInfo(): ReplicationInfo
{
return $this->replicationInfo;
}
/**
* An empty setter makes the above properties read-only
*
* @param string $a key
* @param mixed $b value
*
* @return void
*/
public function __set($a, $b)
{
// Discard everything
}
/**
* Gets the allocations for constructor
*
* @return array
*/
private function getAllocations()
{
return [
// variable name => section
// variable names match when they begin with the given string
'Com_' => 'com',
'Innodb_' => 'innodb',
'Ndb_' => 'ndb',
'Handler_' => 'handler',
'Qcache_' => 'qcache',
'Threads_' => 'threads',
'Slow_launch_threads' => 'threads',
'Binlog_cache_' => 'binlog_cache',
'Created_tmp_' => 'created_tmp',
'Key_' => 'key',
'Delayed_' => 'delayed',
'Not_flushed_delayed_rows' => 'delayed',
'Flush_commands' => 'query',
'Last_query_cost' => 'query',
'Slow_queries' => 'query',
'Queries' => 'query',
'Prepared_stmt_count' => 'query',
'Select_' => 'select',
'Sort_' => 'sort',
'Open_tables' => 'table',
'Opened_tables' => 'table',
'Open_table_definitions' => 'table',
'Opened_table_definitions' => 'table',
'Table_locks_' => 'table',
'Rpl_status' => 'repl',
'Slave_' => 'repl',
'Tc_' => 'tc',
'Ssl_' => 'ssl',
'Open_files' => 'files',
'Open_streams' => 'files',
'Opened_files' => 'files',
];
}
/**
* Gets the sections for constructor
*
* @return array
*/
private function getSections()
{
return [
// section => section name (description)
'com' => 'Com',
'query' => __('SQL query'),
'innodb' => 'InnoDB',
'ndb' => 'NDB',
'handler' => __('Handler'),
'qcache' => __('Query cache'),
'threads' => __('Threads'),
'binlog_cache' => __('Binary log'),
'created_tmp' => __('Temporary data'),
'delayed' => __('Delayed inserts'),
'key' => __('Key cache'),
'select' => __('Joins'),
'repl' => __('Replication'),
'sort' => __('Sorting'),
'table' => __('Tables'),
'tc' => __('Transaction coordinator'),
'files' => __('Files'),
'ssl' => 'SSL',
'other' => __('Other'),
];
}
/**
* Gets the links for constructor
*
* @return array
*/
private function getLinks()
{
$primaryInfo = $this->replicationInfo->getPrimaryInfo();
$replicaInfo = $this->replicationInfo->getReplicaInfo();
$links = [];
// variable or section name => (name => url)
$links['table'][__('Flush (close) all tables')] = [
'url' => $this->selfUrl,
'params' => Url::getCommon(['flush' => 'TABLES'], ''),
];
$links['table'][__('Show open tables')] = [
'url' => Url::getFromRoute('/sql'),
'params' => Url::getCommon([
'sql_query' => 'SHOW OPEN TABLES',
'goto' => $this->selfUrl,
], ''),
];
if ($primaryInfo['status']) {
$links['repl'][__('Show slave hosts')] = [
'url' => Url::getFromRoute('/sql'),
'params' => Url::getCommon([
'sql_query' => 'SHOW SLAVE HOSTS',
'goto' => $this->selfUrl,
], ''),
];
$links['repl'][__('Show master status')] = [
'url' => '#replication_master',
'params' => '',
];
}
if ($replicaInfo['status']) {
$links['repl'][__('Show slave status')] = [
'url' => '#replication_slave',
'params' => '',
];
}
$links['repl']['doc'] = 'replication';
$links['qcache'][__('Flush query cache')] = [
'url' => $this->selfUrl,
'params' => Url::getCommon(['flush' => 'QUERY CACHE'], ''),
];
$links['qcache']['doc'] = 'query_cache';
$links['threads']['doc'] = 'mysql_threads';
$links['key']['doc'] = 'myisam_key_cache';
$links['binlog_cache']['doc'] = 'binary_log';
$links['Slow_queries']['doc'] = 'slow_query_log';
$links['innodb'][__('Variables')] = [
'url' => Url::getFromRoute('/server/engines/InnoDB'),
'params' => '',
];
$links['innodb'][__('InnoDB Status')] = [
'url' => Url::getFromRoute('/server/engines/InnoDB/Status'),
'params' => '',
];
$links['innodb']['doc'] = 'innodb';
return $links;
}
/**
* Calculate some values
*
* @param array $server_status contains results of SHOW GLOBAL STATUS
* @param array $server_variables contains results of SHOW GLOBAL VARIABLES
*
* @return array
*/
private function calculateValues(array $server_status, array $server_variables)
{
// Key_buffer_fraction
if (isset($server_status['Key_blocks_unused'], $server_variables['key_cache_block_size'])
&& isset($server_variables['key_buffer_size'])
&& $server_variables['key_buffer_size'] != 0
) {
$server_status['Key_buffer_fraction_%']
= 100
- $server_status['Key_blocks_unused']
* $server_variables['key_cache_block_size']
/ $server_variables['key_buffer_size']
* 100;
} elseif (isset($server_status['Key_blocks_used'], $server_variables['key_buffer_size'])
&& $server_variables['key_buffer_size'] != 0
) {
$server_status['Key_buffer_fraction_%']
= $server_status['Key_blocks_used']
* 1024
/ $server_variables['key_buffer_size'];
}
// Ratio for key read/write
if (isset($server_status['Key_writes'], $server_status['Key_write_requests'])
&& $server_status['Key_write_requests'] > 0
) {
$key_writes = $server_status['Key_writes'];
$key_write_requests = $server_status['Key_write_requests'];
$server_status['Key_write_ratio_%']
= 100 * $key_writes / $key_write_requests;
}
if (isset($server_status['Key_reads'], $server_status['Key_read_requests'])
&& $server_status['Key_read_requests'] > 0
) {
$key_reads = $server_status['Key_reads'];
$key_read_requests = $server_status['Key_read_requests'];
$server_status['Key_read_ratio_%']
= 100 * $key_reads / $key_read_requests;
}
// Threads_cache_hitrate
if (isset($server_status['Threads_created'], $server_status['Connections'])
&& $server_status['Connections'] > 0
) {
$server_status['Threads_cache_hitrate_%']
= 100 - $server_status['Threads_created']
/ $server_status['Connections'] * 100;
}
return $server_status;
}
/**
* Sort variables into arrays
*
* @param array $server_status contains results of SHOW GLOBAL STATUS
* @param array $allocations allocations for sections
* @param array $allocationMap map variables to their section
* @param array $sectionUsed is a section used?
* @param array $used_queries used queries
*
* @return array ($allocationMap, $sectionUsed, $used_queries)
*/
private function sortVariables(
array $server_status,
array $allocations,
array $allocationMap,
array $sectionUsed,
array $used_queries
) {
foreach ($server_status as $name => $value) {
$section_found = false;
foreach ($allocations as $filter => $section) {
if (mb_strpos($name, $filter) === false) {
continue;
}
$allocationMap[$name] = $section;
$sectionUsed[$section] = true;
$section_found = true;
if ($section === 'com' && $value > 0) {
$used_queries[$name] = $value;
}
break; // Only exits inner loop
}
if ($section_found) {
continue;
}
$allocationMap[$name] = 'other';
$sectionUsed['other'] = true;
}
return [
$allocationMap,
$sectionUsed,
$used_queries,
];
}
public function __construct()
{
global $dbi;
$this->replicationInfo = new ReplicationInfo($dbi);
$this->replicationInfo->load($_POST['master_connection'] ?? null);
$this->selfUrl = basename($GLOBALS['PMA_PHP_SELF']);
// get status from server
$server_status_result = $dbi->tryQuery('SHOW GLOBAL STATUS');
$server_status = [];
if ($server_status_result === false) {
$this->dataLoaded = false;
} else {
$this->dataLoaded = true;
while ($arr = $dbi->fetchRow($server_status_result)) {
$server_status[$arr[0]] = $arr[1];
}
$dbi->freeResult($server_status_result);
}
// for some calculations we require also some server settings
$server_variables = $dbi->fetchResult(
'SHOW GLOBAL VARIABLES',
0,
1
);
// cleanup of some deprecated values
$server_status = self::cleanDeprecated($server_status);
// calculate some values
$server_status = $this->calculateValues(
$server_status,
$server_variables
);
// split variables in sections
$allocations = $this->getAllocations();
$sections = $this->getSections();
// define some needful links/commands
$links = $this->getLinks();
// Variable to contain all com_ variables (query statistics)
$used_queries = [];
// Variable to map variable names to their respective section name
// (used for js category filtering)
$allocationMap = [];
// Variable to mark used sections
$sectionUsed = [];
// sort vars into arrays
[
$allocationMap,
$sectionUsed,
$used_queries,
] = $this->sortVariables(
$server_status,
$allocations,
$allocationMap,
$sectionUsed,
$used_queries
);
// admin commands are not queries (e.g. they include COM_PING,
// which is excluded from $server_status['Questions'])
unset($used_queries['Com_admin_commands']);
// Set all class properties
$this->dbIsLocal = false;
// can be null if $cfg['ServerDefault'] = 0;
$serverHostToLower = mb_strtolower(
(string) $GLOBALS['cfg']['Server']['host']
);
if ($serverHostToLower === 'localhost'
|| $GLOBALS['cfg']['Server']['host'] === '127.0.0.1'
|| $GLOBALS['cfg']['Server']['host'] === '::1'
) {
$this->dbIsLocal = true;
}
$this->status = $server_status;
$this->sections = $sections;
$this->variables = $server_variables;
$this->usedQueries = $used_queries;
$this->allocationMap = $allocationMap;
$this->links = $links;
$this->sectionUsed = $sectionUsed;
}
/**
* cleanup of some deprecated values
*
* @param array $server_status status array to process
*
* @return array
*/
public static function cleanDeprecated(array $server_status)
{
$deprecated = [
'Com_prepare_sql' => 'Com_stmt_prepare',
'Com_execute_sql' => 'Com_stmt_execute',
'Com_dealloc_sql' => 'Com_stmt_close',
];
foreach ($deprecated as $old => $new) {
if (! isset($server_status[$old], $server_status[$new])) {
continue;
}
unset($server_status[$old]);
}
return $server_status;
}
}