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<?php
/**
* Functions for the replication GUI
*/
declare(strict_types=1);
namespace PhpMyAdmin;
use PhpMyAdmin\Query\Utilities;
use function __;
use function htmlspecialchars;
use function in_array;
use function mb_strrpos;
use function mb_strtolower;
use function mb_substr;
use function sprintf;
use function str_replace;
use function strlen;
use function strtok;
use function time;
/**
* Functions for the replication GUI
*/
class ReplicationGui
{
/** @var Replication */
private $replication;
/** @var Template */
private $template;
/**
* @param Replication $replication Replication instance
* @param Template $template Template instance
*/
public function __construct(Replication $replication, Template $template)
{
$this->replication = $replication;
$this->template = $template;
}
/**
* returns HTML for error message
*
* @return string HTML code
*/
public function getHtmlForErrorMessage(): string
{
$html = '';
if (isset($_SESSION['replication']['sr_action_status'], $_SESSION['replication']['sr_action_info'])) {
if ($_SESSION['replication']['sr_action_status'] === 'error') {
$errorMessage = $_SESSION['replication']['sr_action_info'];
$html .= Message::error($errorMessage)->getDisplay();
$_SESSION['replication']['sr_action_status'] = 'unknown';
} elseif ($_SESSION['replication']['sr_action_status'] === 'success') {
$successMessage = $_SESSION['replication']['sr_action_info'];
$html .= Message::success($successMessage)->getDisplay();
$_SESSION['replication']['sr_action_status'] = 'unknown';
}
}
return $html;
}
/**
* returns HTML for primary replication
*
* @return string HTML code
*/
public function getHtmlForPrimaryReplication(): string
{
global $dbi;
if (! isset($_POST['repl_clear_scr'])) {
$primaryStatusTable = $this->getHtmlForReplicationStatusTable('primary', true, false);
$replicas = $dbi->fetchResult('SHOW SLAVE HOSTS', null, null);
$urlParams = $GLOBALS['urlParams'];
$urlParams['primary_add_user'] = true;
$urlParams['repl_clear_scr'] = true;
}
if (isset($_POST['primary_add_user'])) {
$primaryAddReplicaUser = $this->getHtmlForReplicationPrimaryAddReplicaUser();
}
return $this->template->render('server/replication/primary_replication', [
'clear_screen' => isset($_POST['repl_clear_scr']),
'primary_status_table' => $primaryStatusTable ?? '',
'replicas' => $replicas ?? [],
'url_params' => $urlParams ?? [],
'primary_add_user' => isset($_POST['primary_add_user']),
'primary_add_replica_user' => $primaryAddReplicaUser ?? '',
]);
}
/**
* returns HTML for primary replication configuration
*
* @return string HTML code
*/
public function getHtmlForPrimaryConfiguration(): string
{
$databaseMultibox = $this->getHtmlForReplicationDbMultibox();
return $this->template->render(
'server/replication/primary_configuration',
['database_multibox' => $databaseMultibox]
);
}
/**
* returns HTML for replica replication configuration
*
* @param bool $serverReplicaStatus Whether it is Primary or Replica
* @param array $serverReplicaReplication Replica replication
*
* @return string HTML code
*/
public function getHtmlForReplicaConfiguration(
$serverReplicaStatus,
array $serverReplicaReplication
): string {
global $dbi;
$serverReplicaMultiReplication = $dbi->fetchResult('SHOW ALL SLAVES STATUS');
if ($serverReplicaStatus) {
$urlParams = $GLOBALS['urlParams'];
$urlParams['sr_take_action'] = true;
$urlParams['sr_replica_server_control'] = true;
if ($serverReplicaReplication[0]['Slave_IO_Running'] === 'No') {
$urlParams['sr_replica_action'] = 'start';
} else {
$urlParams['sr_replica_action'] = 'stop';
}
$urlParams['sr_replica_control_param'] = 'IO_THREAD';
$replicaControlIoLink = Url::getCommon($urlParams, '', false);
if ($serverReplicaReplication[0]['Slave_SQL_Running'] === 'No') {
$urlParams['sr_replica_action'] = 'start';
} else {
$urlParams['sr_replica_action'] = 'stop';
}
$urlParams['sr_replica_control_param'] = 'SQL_THREAD';
$replicaControlSqlLink = Url::getCommon($urlParams, '', false);
if (
$serverReplicaReplication[0]['Slave_IO_Running'] === 'No'
|| $serverReplicaReplication[0]['Slave_SQL_Running'] === 'No'
) {
$urlParams['sr_replica_action'] = 'start';
} else {
$urlParams['sr_replica_action'] = 'stop';
}
$urlParams['sr_replica_control_param'] = null;
$replicaControlFullLink = Url::getCommon($urlParams, '', false);
$urlParams['sr_replica_action'] = 'reset';
$replicaControlResetLink = Url::getCommon($urlParams, '', false);
$urlParams = $GLOBALS['urlParams'];
$urlParams['sr_take_action'] = true;
$urlParams['sr_replica_skip_error'] = true;
$replicaSkipErrorLink = Url::getCommon($urlParams, '', false);
$urlParams = $GLOBALS['urlParams'];
$urlParams['replica_configure'] = true;
$urlParams['repl_clear_scr'] = true;
$reconfigurePrimaryLink = Url::getCommon($urlParams, '', false);
$replicaStatusTable = $this->getHtmlForReplicationStatusTable('replica', true, false);
$replicaIoRunning = $serverReplicaReplication[0]['Slave_IO_Running'] !== 'No';
$replicaSqlRunning = $serverReplicaReplication[0]['Slave_SQL_Running'] !== 'No';
}
return $this->template->render('server/replication/replica_configuration', [
'server_replica_multi_replication' => $serverReplicaMultiReplication,
'url_params' => $GLOBALS['urlParams'],
'primary_connection' => $_POST['primary_connection'] ?? '',
'server_replica_status' => $serverReplicaStatus,
'replica_status_table' => $replicaStatusTable ?? '',
'replica_sql_running' => $replicaSqlRunning ?? false,
'replica_io_running' => $replicaIoRunning ?? false,
'replica_control_full_link' => $replicaControlFullLink ?? '',
'replica_control_reset_link' => $replicaControlResetLink ?? '',
'replica_control_sql_link' => $replicaControlSqlLink ?? '',
'replica_control_io_link' => $replicaControlIoLink ?? '',
'replica_skip_error_link' => $replicaSkipErrorLink ?? '',
'reconfigure_primary_link' => $reconfigurePrimaryLink ?? '',
'has_replica_configure' => isset($_POST['replica_configure']),
]);
}
/**
* returns HTML code for selecting databases
*
* @return string HTML code
*/
public function getHtmlForReplicationDbMultibox(): string
{
$databases = [];
foreach ($GLOBALS['dblist']->databases as $database) {
if (Utilities::isSystemSchema($database)) {
continue;
}
$databases[] = $database;
}
return $this->template->render('server/replication/database_multibox', ['databases' => $databases]);
}
/**
* returns HTML for changing primary
*
* @param string $submitName submit button name
*
* @return string HTML code
*/
public function getHtmlForReplicationChangePrimary($submitName): string
{
[
$usernameLength,
$hostnameLength,
] = $this->getUsernameHostnameLength();
return $this->template->render('server/replication/change_primary', [
'server_id' => time(),
'username_length' => $usernameLength,
'hostname_length' => $hostnameLength,
'submit_name' => $submitName,
]);
}
/**
* This function returns html code for table with replication status.
*
* @param string $type either primary or replica
* @param bool $isHidden if true, then default style is set to hidden, default value false
* @param bool $hasTitle if true, then title is displayed, default true
*
* @return string HTML code
*/
public function getHtmlForReplicationStatusTable(
$type,
$isHidden = false,
$hasTitle = true
): string {
global $dbi;
$replicationInfo = new ReplicationInfo($dbi);
$replicationInfo->load($_POST['primary_connection'] ?? null);
$replicationVariables = $replicationInfo->primaryVariables;
$variablesAlerts = null;
$variablesOks = null;
$serverReplication = $replicationInfo->getPrimaryStatus();
if ($type === 'replica') {
$replicationVariables = $replicationInfo->replicaVariables;
$variablesAlerts = [
'Slave_IO_Running' => 'No',
'Slave_SQL_Running' => 'No',
];
$variablesOks = [
'Slave_IO_Running' => 'Yes',
'Slave_SQL_Running' => 'Yes',
];
$serverReplication = $replicationInfo->getReplicaStatus();
}
$variables = [];
foreach ($replicationVariables as $variable) {
$serverReplicationVariable = isset($serverReplication[0])
? $serverReplication[0][$variable]
: '';
$variables[$variable] = [
'name' => $variable,
'status' => '',
'value' => $serverReplicationVariable,
];
if (isset($variablesAlerts[$variable]) && $variablesAlerts[$variable] === $serverReplicationVariable) {
$variables[$variable]['status'] = 'text-danger';
} elseif (isset($variablesOks[$variable]) && $variablesOks[$variable] === $serverReplicationVariable) {
$variables[$variable]['status'] = 'text-success';
}
$variablesWrap = [
'Replicate_Do_DB',
'Replicate_Ignore_DB',
'Replicate_Do_Table',
'Replicate_Ignore_Table',
'Replicate_Wild_Do_Table',
'Replicate_Wild_Ignore_Table',
];
if (! in_array($variable, $variablesWrap)) {
continue;
}
$variables[$variable]['value'] = str_replace(',', ', ', $serverReplicationVariable);
}
return $this->template->render('server/replication/status_table', [
'type' => $type,
'is_hidden' => $isHidden,
'has_title' => $hasTitle,
'variables' => $variables,
]);
}
/**
* get the correct username and hostname lengths for this MySQL server
*
* @return array<int,int> username length, hostname length
*/
public function getUsernameHostnameLength(): array
{
global $dbi;
$fieldsInfo = $dbi->getColumns('mysql', 'user');
$usernameLength = 16;
$hostnameLength = 41;
foreach ($fieldsInfo as $val) {
if ($val['Field'] === 'User') {
strtok($val['Type'], '()');
$v = strtok('()');
if (Util::isInteger($v)) {
$usernameLength = (int) $v;
}
} elseif ($val['Field'] === 'Host') {
strtok($val['Type'], '()');
$v = strtok('()');
if (Util::isInteger($v)) {
$hostnameLength = (int) $v;
}
}
}
return [
$usernameLength,
$hostnameLength,
];
}
/**
* returns html code to add a replication replica user to the primary
*
* @return string HTML code
*/
public function getHtmlForReplicationPrimaryAddReplicaUser(): string
{
global $dbi;
[
$usernameLength,
$hostnameLength,
] = $this->getUsernameHostnameLength();
if (isset($_POST['username']) && strlen($_POST['username']) === 0) {
$GLOBALS['pred_username'] = 'any';
}
$username = '';
if (! empty($_POST['username'])) {
$username = $GLOBALS['new_username'] ?? $_POST['username'];
}
$currentUser = $dbi->fetchValue('SELECT USER();');
if (! empty($currentUser)) {
$userHost = str_replace(
"'",
'',
mb_substr(
$currentUser,
mb_strrpos($currentUser, '@') + 1
)
);
if ($userHost !== 'localhost' && $userHost !== '127.0.0.1') {
$thisHost = $userHost;
}
}
// when we start editing a user, $GLOBALS['pred_hostname'] is not defined
if (! isset($GLOBALS['pred_hostname']) && isset($_POST['hostname'])) {
switch (mb_strtolower($_POST['hostname'])) {
case 'localhost':
case '127.0.0.1':
$GLOBALS['pred_hostname'] = 'localhost';
break;
case '%':
$GLOBALS['pred_hostname'] = 'any';
break;
default:
$GLOBALS['pred_hostname'] = 'userdefined';
break;
}
}
return $this->template->render('server/replication/primary_add_replica_user', [
'username_length' => $usernameLength,
'hostname_length' => $hostnameLength,
'has_username' => isset($_POST['username']),
'username' => $username,
'hostname' => $_POST['hostname'] ?? '',
'predefined_username' => $GLOBALS['pred_username'] ?? '',
'predefined_hostname' => $GLOBALS['pred_hostname'] ?? '',
'this_host' => $thisHost ?? null,
]);
}
/**
* handle control requests
*/
public function handleControlRequest(): void
{
if (! isset($_POST['sr_take_action'])) {
return;
}
$refresh = false;
$result = false;
$messageSuccess = '';
$messageError = '';
if (isset($_POST['replica_changeprimary']) && ! $GLOBALS['cfg']['AllowArbitraryServer']) {
$_SESSION['replication']['sr_action_status'] = 'error';
$_SESSION['replication']['sr_action_info'] = __(
'Connection to server is disabled, please enable'
. ' $cfg[\'AllowArbitraryServer\'] in phpMyAdmin configuration.'
);
} elseif (isset($_POST['replica_changeprimary'])) {
$result = $this->handleRequestForReplicaChangePrimary();
} elseif (isset($_POST['sr_replica_server_control'])) {
$result = $this->handleRequestForReplicaServerControl();
$refresh = true;
switch ($_POST['sr_replica_action']) {
case 'start':
$messageSuccess = __('Replication started successfully.');
$messageError = __('Error starting replication.');
break;
case 'stop':
$messageSuccess = __('Replication stopped successfully.');
$messageError = __('Error stopping replication.');
break;
case 'reset':
$messageSuccess = __('Replication resetting successfully.');
$messageError = __('Error resetting replication.');
break;
default:
$messageSuccess = __('Success.');
$messageError = __('Error.');
break;
}
} elseif (isset($_POST['sr_replica_skip_error'])) {
$result = $this->handleRequestForReplicaSkipError();
}
if ($refresh) {
$response = ResponseRenderer::getInstance();
if ($response->isAjax()) {
$response->setRequestStatus($result);
$response->addJSON(
'message',
$result
? Message::success($messageSuccess)
: Message::error($messageError)
);
} else {
Core::sendHeaderLocation(
'./index.php?route=/server/replication'
. Url::getCommonRaw($GLOBALS['urlParams'], '&')
);
}
}
unset($refresh);
}
public function handleRequestForReplicaChangePrimary(): bool
{
global $dbi;
$sr = [
'username' => $dbi->escapeString($_POST['username']),
'pma_pw' => $dbi->escapeString($_POST['pma_pw']),
'hostname' => $dbi->escapeString($_POST['hostname']),
'port' => (int) $dbi->escapeString($_POST['text_port']),
];
$_SESSION['replication']['m_username'] = $sr['username'];
$_SESSION['replication']['m_password'] = $sr['pma_pw'];
$_SESSION['replication']['m_hostname'] = $sr['hostname'];
$_SESSION['replication']['m_port'] = $sr['port'];
$_SESSION['replication']['m_correct'] = '';
$_SESSION['replication']['sr_action_status'] = 'error';
$_SESSION['replication']['sr_action_info'] = __('Unknown error');
// Attempt to connect to the new primary server
$linkToPrimary = $this->replication->connectToPrimary(
$sr['username'],
$sr['pma_pw'],
$sr['hostname'],
$sr['port']
);
if (! $linkToPrimary) {
$_SESSION['replication']['sr_action_status'] = 'error';
$_SESSION['replication']['sr_action_info'] = sprintf(
__('Unable to connect to primary %s.'),
htmlspecialchars($sr['hostname'])
);
} else {
// Read the current primary position
$position = $this->replication->replicaBinLogPrimary(DatabaseInterface::CONNECT_AUXILIARY);
if (empty($position)) {
$_SESSION['replication']['sr_action_status'] = 'error';
$_SESSION['replication']['sr_action_info'] = __(
'Unable to read primary log position. Possible privilege problem on primary.'
);
} else {
$_SESSION['replication']['m_correct'] = true;
if (
! $this->replication->replicaChangePrimary(
$sr['username'],
$sr['pma_pw'],
$sr['hostname'],
$sr['port'],
$position,
true,
false,
DatabaseInterface::CONNECT_USER
)
) {
$_SESSION['replication']['sr_action_status'] = 'error';
$_SESSION['replication']['sr_action_info'] = __('Unable to change primary!');
} else {
$_SESSION['replication']['sr_action_status'] = 'success';
$_SESSION['replication']['sr_action_info'] = sprintf(
__('Primary server changed successfully to %s.'),
htmlspecialchars($sr['hostname'])
);
}
}
}
return $_SESSION['replication']['sr_action_status'] === 'success';
}
public function handleRequestForReplicaServerControl(): bool
{
global $dbi;
/** @var string|null $control */
$control = $_POST['sr_replica_control_param'] ?? null;
if ($_POST['sr_replica_action'] === 'reset') {
$qStop = $this->replication->replicaControl('STOP', null, DatabaseInterface::CONNECT_USER);
$qReset = $dbi->tryQuery('RESET SLAVE;');
$qStart = $this->replication->replicaControl('START', null, DatabaseInterface::CONNECT_USER);
$result = $qStop !== false && $qStop !== -1 &&
$qReset !== false &&
$qStart !== false && $qStart !== -1;
} else {
$qControl = $this->replication->replicaControl(
$_POST['sr_replica_action'],
$control,
DatabaseInterface::CONNECT_USER
);
$result = $qControl !== false && $qControl !== -1;
}
return $result;
}
public function handleRequestForReplicaSkipError(): bool
{
global $dbi;
$count = 1;
if (isset($_POST['sr_skip_errors_count'])) {
$count = $_POST['sr_skip_errors_count'] * 1;
}
$qStop = $this->replication->replicaControl('STOP', null, DatabaseInterface::CONNECT_USER);
$qSkip = $dbi->tryQuery('SET GLOBAL SQL_SLAVE_SKIP_COUNTER = ' . $count . ';');
$qStart = $this->replication->replicaControl('START', null, DatabaseInterface::CONNECT_USER);
return $qStop !== false && $qStop !== -1 &&
$qSkip !== false &&
$qStart !== false && $qStart !== -1;
}
}
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