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<?php |
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namespace vipnytt\RobotsTxtParser\Client\SQL\Cache; |
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use PDO; |
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use vipnytt\RobotsTxtParser\Client\SQL\SQLInterface; |
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use vipnytt\RobotsTxtParser\Client\SQL\SQLTrait; |
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use vipnytt\RobotsTxtParser\RobotsTxtInterface; |
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use vipnytt\RobotsTxtParser\URI; |
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/** |
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* Class CacheCoreSQL |
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* |
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* @package vipnytt\RobotsTxtParser\Client\SQL\Cache |
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*/ |
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abstract class CacheCoreSQL implements RobotsTxtInterface, SQLInterface |
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{ |
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use SQLTrait; |
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/** |
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* Database connection |
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* @var PDO |
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*/ |
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protected $pdo; |
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/** |
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* PDO driver |
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* @var string |
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*/ |
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protected $driver; |
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/** |
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* GuzzleHTTP config |
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* @var array |
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*/ |
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protected $guzzleConfig = []; |
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/** |
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* Byte limit |
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* @var int |
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*/ |
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protected $byteLimit = self::BYTE_LIMIT; |
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/** |
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* CacheCoreSQL constructor. |
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* |
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* @param PDO $pdo |
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* @param array $guzzleConfig |
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* @param int|null $byteLimit |
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*/ |
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public function __construct(PDO $pdo, array $guzzleConfig = [], $byteLimit = self::BYTE_LIMIT) |
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{ |
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$this->pdo = $this->pdoInitialize($pdo); |
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$this->driver = $this->pdo->getAttribute(PDO::ATTR_DRIVER_NAME); |
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if ($this->driver != 'mysql') { |
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trigger_error('Unsupported database. Currently supports MySQL only. ' . self::README_SQL_CACHE, E_USER_WARNING); |
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} |
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$this->guzzleConfig = $guzzleConfig; |
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$this->byteLimit = $byteLimit; |
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} |
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/** |
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* Process the update queue |
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* |
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* @param int|null $workerID |
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* @return bool |
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*/ |
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public function cron($workerID = null) |
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{ |
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$worker = $this->setWorkerID($workerID); |
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$result = true; |
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while ($result) { |
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$query = $this->pdo->prepare(<<<SQL |
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UPDATE robotstxt__cache0 |
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SET worker = :workerID |
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WHERE worker IS NULL AND nextUpdate <= UNIX_TIMESTAMP() |
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ORDER BY nextUpdate ASC |
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LIMIT 1; |
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SELECT base |
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FROM robotstxt__cache0 |
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WHERE worker = :worker; |
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SQL |
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); |
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$query->bindParam(':workerID', $worker, PDO::PARAM_INT); |
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$query->execute(); |
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if ($query->rowCount() > 0) { |
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while ($row = $query->fetch(PDO::FETCH_ASSOC)) { |
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$result = $this->push(new URI($row['base'], $this->guzzleConfig, $this->byteLimit)); |
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} |
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continue; |
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} |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Set WorkerID |
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* |
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* @param int|null $workerID |
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* @return int |
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*/ |
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protected function setWorkerID($workerID = null) |
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{ |
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if ( |
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is_int($workerID) && |
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$workerID <= 255 && |
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$workerID >= 1 |
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) { |
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return $workerID; |
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} elseif ($workerID !== null) { |
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trigger_error('WorkerID out of range (1-255)', E_USER_WARNING); |
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} |
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return rand(1, 255); |
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} |
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/** |
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* Update an robots.txt in the database |
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* |
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* @param URI $request |
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* @return bool |
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*/ |
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public function push(URI $request) |
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{ |
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$base = $request->getBaseUri(); |
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$statusCode = $request->getStatusCode(); |
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$nextUpdate = $request->nextUpdate(); |
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if ( |
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$statusCode >= 500 && |
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$statusCode < 600 && |
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mb_strpos($base, 'http') === 0 |
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) { |
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$query = $this->pdo->prepare(<<<SQL |
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SELECT validUntil |
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FROM robotstxt__cache0 |
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WHERE base = :base; |
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SQL |
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); |
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$query->bindParam(':base', $base, PDO::PARAM_STR); |
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$query->execute(); |
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if ( |
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$query->rowCount() > 0 && |
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($existingValidUntil = $query->fetch(PDO::FETCH_ASSOC)['validUntil']) > time() |
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) { |
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$nextUpdate = min($existingValidUntil, $nextUpdate); |
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$query = $this->pdo->prepare(<<<SQL |
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UPDATE robotstxt__cache0 |
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SET nextUpdate = :nextUpdate, worker = NULL |
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WHERE base = :base; |
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SQL |
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); |
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$query->bindParam(':base', $base, PDO::PARAM_STR); |
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$query->bindParam(':nextUpdate', $nextUpdate, PDO::PARAM_INT); |
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return $query->execute(); |
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} |
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} |
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$validUntil = $request->validUntil(); |
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$content = $request->getContents(); |
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$query = $this->pdo->prepare(<<<SQL |
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INSERT INTO robotstxt__cache0 (base, content, statusCode, validUntil, nextUpdate) |
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VALUES (:base, :content, :statusCode, :validUntil, :nextUpdate) |
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ON DUPLICATE KEY UPDATE content = :content, statusCode = :statusCode, validUntil = :validUntil, |
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nextUpdate = :nextUpdate, worker = 0; |
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SQL |
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); |
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$query->bindParam(':base', $base, PDO::PARAM_STR); |
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$query->bindParam(':content', $content, PDO::PARAM_STR); |
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$query->bindParam(':statusCode', $statusCode, PDO::PARAM_INT); |
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$query->bindParam(':validUntil', $validUntil, PDO::PARAM_INT); |
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$query->bindParam(':nextUpdate', $nextUpdate, PDO::PARAM_INT); |
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return $query->execute(); |
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} |
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} |
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VIPnytt /
RobotsTxtParser
