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<?php |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Self-healing table repair + invalid-data retry for plugin SQL queries. |
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* |
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* Extracted from DatabaseCore as part of the (4/6) DatabaseCore decomposition. |
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* Owns two cohesive responsibilities that are both error-driven, single-retry, |
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* recursion-guarded recovery paths for SQL errors observed by queryAndGetResults: |
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* |
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* 1. REPAIR TABLE for "marked as crashed" and "Incorrect key file" errors. |
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* Parses the affected table name out of the wpdb error message, validates |
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* it as a plugin table (abj404 prefix only), runs REPAIR TABLE, and (for |
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* the "Incorrect key file" path) flushes and retries the original query |
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* once. If the table name cannot be sanitized, surfaces a deduplicated |
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* admin notice instead. |
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* 2. Invalid-data retry. When wpdb reports an invalid-data error, asks |
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* WPDBExtension to strip the invalid bytes from the query, then flushes |
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* and retries the stripped query once. Recursion guard prevents infinite |
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* loops if the stripped query also fails. |
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* 3. Duplicate-id repair for the ALTER TABLE auto_increment resequencing |
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* failure mode. Parses the duplicate id out of the error and the target |
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* table out of the SQL, validates both, and deletes the conflicting row. |
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* |
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* This class holds no DatabaseCore back-reference. It receives: |
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* - a query-runner callable bound over DatabaseCore::queryAndGetResults |
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* (signature: function(string, array<string,mixed>): array<string,mixed>); |
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* - a result-harvester callable bound over DatabaseWpdbResultHarvester |
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* (signature: function(array<string,mixed>): void, by-reference); |
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* - a result-type getter bound over DatabaseCore::getCurrentResultType |
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* (signature: function(): string); |
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* - a notice setter bound over DatabaseNoticeStateHolder::setPluginDbNotice |
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* (signature: function(string, string, string, string): void); |
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* - ABJ_404_Solution_Functions for regex/string helpers and the plugin logger. |
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* |
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* The recursion guards are static properties on this class (they must survive |
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* across helper invocations within a single request) and are functionally |
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* identical to the former DatabaseCore::$tableRepairInProgress and |
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* DatabaseCore::$invalidDataRetryInProgress. |
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*/ |
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class ABJ_404_Solution_DatabaseTableRepairer { |
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|
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/** @var bool Prevent recursive auto-repair attempts on SQL errors. */ |
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private static $tableRepairInProgress = false; |
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|
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/** @var bool Prevent recursive invalid-data retry attempts. */ |
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private static $invalidDataRetryInProgress = false; |
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|
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/** @var callable(string, array<string,mixed>): array<string,mixed> */ |
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private $queryRunner; |
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|
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/** @var callable(array<string,mixed>): void */ |
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private $resultHarvester; |
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|
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/** @var callable(): string */ |
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private $resultTypeGetter; |
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|
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/** @var callable(string, string, string, string): void */ |
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private $noticeSetter; |
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|
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/** @var ABJ_404_Solution_Functions */ |
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private $f; |
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|
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/** @var ABJ_404_Solution_Logging */ |
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private $logger; |
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|
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/** |
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* @param callable(string, array<string,mixed>): array<string,mixed> $queryRunner |
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* Runs a SQL query through the centralized error-handling pipeline and |
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* returns its result array. Bound by DatabaseCore over queryAndGetResults(). |
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* @param callable(array<string,mixed>): void $resultHarvester |
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* Copies wpdb->last_error / rows_affected / insert_id into the result array, |
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* by reference. Bound by DatabaseCore over DatabaseWpdbResultHarvester. |
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* @param callable(): string $resultTypeGetter |
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* Returns the current wpdb result type (ARRAY_A or OBJECT) for retries. |
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* @param callable(string, string, string, string): void $noticeSetter |
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* Persists a plugin-db admin notice (type, message, guidance, errorString). |
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* @param ABJ_404_Solution_Functions $functions |
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* @param ABJ_404_Solution_Logging $logger |
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*/ |
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public function __construct( |
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callable $queryRunner, |
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callable $resultHarvester, |
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callable $resultTypeGetter, |
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callable $noticeSetter, |
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$functions, |
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$logger |
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) { |
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$this->queryRunner = $queryRunner; |
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$this->resultHarvester = $resultHarvester; |
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$this->resultTypeGetter = $resultTypeGetter; |
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$this->noticeSetter = $noticeSetter; |
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$this->f = $functions; |
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$this->logger = $logger; |
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} |
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|
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/** |
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* Reset the static recursion guards. Intended for test setUp/tearDown only. |
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* |
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* @return void |
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*/ |
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public static function resetRecursionGuardsForTests(): void { |
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self::$tableRepairInProgress = false; |
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self::$invalidDataRetryInProgress = false; |
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} |
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|
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/** @return bool */ |
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public function isTableRepairInProgress(): bool { |
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return self::$tableRepairInProgress; |
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} |
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|
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/** @param bool $value @return void */ |
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public function setTableRepairInProgress(bool $value): void { |
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self::$tableRepairInProgress = $value; |
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} |
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|
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/** |
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* Validate and sanitize a table name extracted from error messages or SQL. |
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* |
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* Rejects anything that isn't [A-Za-z0-9_]+ and anything that doesn't |
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* contain the plugin's "abj404" prefix substring. Logs (warn) on reject so |
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* the rejection is visible at audit time without surfacing to the admin. |
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* |
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* @param string $name Raw table name (may include backticks). |
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* @return string|null Sanitized name, or null if invalid. |
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*/ |
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public function sanitizeTableName(string $name): ?string { |
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$name = trim($name, '`'); |
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if (!preg_match('/^[a-zA-Z0-9_]+$/', $name)) { |
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$this->logger->warn("sanitizeTableName: rejected invalid table name: " . substr($name, 0, 100)); |
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return null; |
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} |
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if (strpos($name, 'abj404') === false) { |
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$this->logger->warn("sanitizeTableName: rejected non-plugin table name: " . $name); |
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return null; |
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} |
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return $name; |
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} |
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|
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/** |
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* Run REPAIR TABLE for a table named in a wpdb error string. |
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* |
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* Recognizes both the "is marked as crashed" message and the "Incorrect |
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* key file for table" message. If the table name cannot be sanitized |
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* (typically because it is a temporary table outside our prefix, e.g. |
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* "#sql_xxx_0.MYI" on a corrupted-disk host), falls back to a 24-hour |
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* deduplicated admin notice telling the site owner to contact their host. |
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* |
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* @param string $errorMessage The wpdb->last_error string. |
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* @return void |
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*/ |
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public function repairTable(string $errorMessage): void { |
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$re1 = "Table '(.*\/)?(.+)' is marked as crashed and "; |
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$re2 = "Incorrect key file for table '(?:.*\/)?([^'.]+?)(?:\\.MYI)?'"; |
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|
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$matches = array(); |
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$this->f->regexMatch($re1, $errorMessage, $matches); |
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|
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if (empty($matches) || count($matches) <= 2 || $this->f->strlen($matches[2]) === 0) { |
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$this->f->regexMatch($re2, $errorMessage, $matches); |
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if (!empty($matches) && isset($matches[1]) && $this->f->strlen($matches[1]) > 0) { |
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$matches[2] = $matches[1]; |
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} |
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} |
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|
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if (!empty($matches) && count($matches) > 2 && $this->f->strlen($matches[2]) > 0) { |
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$rawTableName = $matches[2]; |
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$tableToRepair = $this->sanitizeTableName($rawTableName); |
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if ($tableToRepair !== null) { |
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$query = "REPAIR TABLE `{$tableToRepair}`"; |
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$result = ($this->queryRunner)($query, array('log_errors' => false)); |
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$this->logger->infoMessage("Attempted to repair table " . $tableToRepair . ". Result: " . |
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json_encode($result)); |
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} else { |
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$this->logger->warn("The table " . $rawTableName . " needs to be " . |
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"repaired with something like: repair table " . $rawTableName); |
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|
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$cooldownKey = 'abj404_corrupted_temp_table_notice_until'; |
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$alreadyNotified = function_exists('get_transient') ? get_transient($cooldownKey) : false; |
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if (!$alreadyNotified) { |
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($this->noticeSetter)( |
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'corrupted_temp_table', |
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function_exists('__') ? __('A database temporary table is corrupted - this is usually caused by a full or failing disk. Please contact your host. (MySQL error 1034)', '404-solution') : 'A database temporary table is corrupted - this is usually caused by a full or failing disk. Please contact your host. (MySQL error 1034)', |
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function_exists('__') ? __('A temporary MySQL table was corrupted, usually caused by disk or hardware issues. The plugin cannot repair it. Please contact your hosting provider.', '404-solution') : 'A temporary MySQL table was corrupted, usually caused by disk or hardware issues. The plugin cannot repair it. Please contact your hosting provider.', |
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$errorMessage |
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); |
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if (function_exists('set_transient')) { |
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// @cache-write-audit: opt-out - admin-notice dedup cooldown |
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// (one notice per 24h per failure type), not a query result. |
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set_transient($cooldownKey, 1, 86400); |
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} |
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} |
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} |
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} |
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} |
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|
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/** |
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* Resolve the ALTER TABLE auto_increment resequencing duplicate-id case. |
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* |
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* Parses the duplicate id from the error message and the table name from |
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* the original ALTER TABLE SQL, validates both, and deletes the conflicting |
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* row so the ALTER can be retried by the caller. |
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* |
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* @param string $errorMessage The wpdb->last_error string. |
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* @param string $sqlThatWasRun The ALTER TABLE statement wpdb just ran. |
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* @return void |
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*/ |
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public function repairDuplicateIDs(string $errorMessage, string $sqlThatWasRun): void { |
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$reForID = 'resulting in duplicate entry \'(.+)\' for key'; |
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$reForTableName = "ALTER TABLE (.+) ADD "; |
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$matchesForID = null; |
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$matchesForTableName = null; |
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|
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$this->f->regexMatch($reForID, $errorMessage, $matchesForID); |
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$this->f->regexMatch($reForTableName, $sqlThatWasRun, $matchesForTableName); |
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if (is_array($matchesForID) && isset($matchesForID[1]) && $this->f->strlen($matchesForID[1]) > 0 && |
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is_array($matchesForTableName) && isset($matchesForTableName[1]) && $this->f->strlen($matchesForTableName[1]) > 0) { |
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|
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$idWithDuplicate = $matchesForID[1]; |
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$tableName = $this->sanitizeTableName($matchesForTableName[1]); |
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if ($tableName === null) { |
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$this->logger->warn("repairDuplicateIDs: rejected invalid table name from SQL: " . substr($matchesForTableName[1], 0, 100)); |
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return; |
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} |
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|
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if (!is_numeric($idWithDuplicate)) { |
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$this->logger->errorMessage("Invalid ID extracted from error message: " . $idWithDuplicate); |
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return; |
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} |
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|
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if ($idWithDuplicate == 1) { |
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$idWithDuplicate = 0; |
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} |
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|
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$result = ($this->queryRunner)("DELETE FROM `{$tableName}` where id = %d", |
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array('log_errors' => false, 'query_params' => array(absint($idWithDuplicate)))); |
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$this->logger->infoMessage("Attempted to fix a duplicate entry issue. Table: " . |
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$tableName . ", Result: " . json_encode($result)); |
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} |
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} |
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|
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/** |
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* Attempt REPAIR TABLE after MySQL errno 1034 ("Incorrect key file"), then |
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* retry the original query once. |
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* |
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* On retry success, $result is mutated to the retried result; on retry |
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* failure, $result carries the retried last_error so the surrounding |
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* pipeline can continue its error-handling. |
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* |
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* @param string $query |
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* @param array<string, mixed> $result Passed by reference. |
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* @return void |
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*/ |
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public function repairCorruptedTableAndRetry(string $query, array &$result): void { |
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$errorMessage = is_string($result['last_error']) ? $result['last_error'] : ''; |
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$this->repairTable($errorMessage); |
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if (stripos($errorMessage, 'abj404') !== false) { |
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global $wpdb; |
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$wpdb->flush(); |
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$resultType = ($this->resultTypeGetter)(); |
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// DAO-bypass-approved: retry-after-repair is part of the DAO's |
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// self-healing pipeline; calling queryAndGetResults() here would |
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// re-enter the error-handler that just invoked us. |
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$result['rows'] = $wpdb->get_results($query, $resultType); |
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$result['last_error'] = (string)($wpdb->last_error ?? ''); |
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$result['last_result'] = $wpdb->last_result ?? array(); |
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$result['rows_affected'] = $wpdb->rows_affected ?? 0; |
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$result['insert_id'] = $wpdb->insert_id ?? 0; |
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if ($result['last_error'] === '') { |
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$this->logger->infoMessage("Retry after 'Incorrect key file' repair succeeded for plugin table."); |
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} |
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} |
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} |
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|
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/** |
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* Attempt a single invalid-data retry by asking WPDBExtension to strip |
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* invalid bytes from the query, then re-running the stripped query. |
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* |
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* Recursion-guarded: if the stripped query also produces an invalid-data |
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* error, the second call short-circuits. The `abj404_invalid_data_retry_query` |
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* filter lets site owners override the stripped query (e.g. to enforce a |
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* stricter sanitization policy). |
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* |
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* @param string $query |
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* @param array<string, mixed> $result Passed by reference. |
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* @return void |
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*/ |
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public function attemptInvalidDataRetry($query, &$result) { |
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if (self::$invalidDataRetryInProgress) { |
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return; |
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} |
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self::$invalidDataRetryInProgress = true; |
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try { |
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$retryQuery = $this->get_stripped_query_result($query); |
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$retryQuery = function_exists('apply_filters') |
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? apply_filters('abj404_invalid_data_retry_query', $retryQuery, $query) |
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: $retryQuery; |
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if (!is_string($retryQuery) || trim($retryQuery) === '' || $retryQuery === $query) { |
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return; |
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} |
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global $wpdb; |
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$wpdb->flush(); |
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$resultType = ($this->resultTypeGetter)(); |
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// DAO-bypass-approved: retry-after-strip is part of the DAO's |
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// self-healing pipeline; calling queryAndGetResults() here would |
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// re-enter the error-handler that just invoked us. |
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$result['rows'] = $wpdb->get_results($retryQuery, $resultType); |
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($this->resultHarvester)($result); |
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} catch (Throwable $e) { |
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$this->logger->warn("Invalid-data retry failed: " . $e->getMessage()); |
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} finally { |
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self::$invalidDataRetryInProgress = false; |
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} |
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} |
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|
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/** |
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* Ask WPDBExtension to strip invalid bytes from a query string so the |
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* caller can re-issue a safe version. |
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* |
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* Returns null on any failure (missing extension file, wpdb method |
| 324 |
* unavailable, DB constants undefined, extension constructor throws). |
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* Logs (warn) on exception so the caller does not need to. |
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* |
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* @param string $query |
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* @return NULL|string|WP_Error |
| 329 |
*/ |
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public function get_stripped_query_result($query) { |
| 331 |
try { |
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if (!class_exists('wpdb')) { |
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return null; |
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} |
| 335 |
if (!method_exists('wpdb', 'strip_invalid_text_from_query')) { |
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return null; |
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} |
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|
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$filename = ABJ404_PATH . 'includes/php/wordpress/WPDBExtension.php'; |
| 340 |
if (!file_exists($filename)) { |
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return null; |
| 342 |
} |
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require_once $filename; |
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|
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$my_custom_db = null; |
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if (class_exists('ABJ_404_Solution_WPDBExtension_PHP7')) { |
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$my_custom_db = new ABJ_404_Solution_WPDBExtension_PHP7(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST); |
| 348 |
} else if (class_exists('ABJ_404_Solution_WPDBExtension_PHP5')) { |
| 349 |
$my_custom_db = new ABJ_404_Solution_WPDBExtension_PHP5(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST); |
| 350 |
} |
| 351 |
if ($my_custom_db == null) { |
| 352 |
return null; |
| 353 |
} |
| 354 |
|
| 355 |
$result = $my_custom_db->public_strip_invalid_text_from_query($query); |
| 356 |
|
| 357 |
if (is_wp_error($result)) { |
| 358 |
return 'WP_Error: ' . $result->get_error_message(); |
| 359 |
} |
| 360 |
|
| 361 |
return $result; |
| 362 |
|
| 363 |
} catch (Throwable $e) { |
| 364 |
$this->logger->warn( |
| 365 |
'get_stripped_query_result failed; returning null: ' . $e->getMessage() |
| 366 |
); |
| 367 |
return null; |
| 368 |
} |
| 369 |
} |
| 370 |
|
| 371 |
} |
| 372 |
|
