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<?php |
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/** |
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* Created for IG Monitoring. |
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* User: jakim <[email protected]> |
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* Date: 09.05.2018 |
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*/ |
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namespace app\components\http; |
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use app\models\Proxy; |
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use Carbon\Carbon; |
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use Yii; |
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use yii\base\Component; |
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use yii\base\InvalidConfigException; |
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use yii\db\Expression; |
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class ProxyManager extends Component |
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{ |
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/** |
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* Between requests, in seconds. |
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* |
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* @var int |
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*/ |
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public $restTime = 1; |
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/** |
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* After IG block, in hours. |
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* |
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* @var int |
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*/ |
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public $blockRestTime = 1; |
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public function reserve(bool $ignoreRest = false): Proxy |
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{ |
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$uid = $this->generateUid(); |
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$condition = [ |
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'and', |
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['active' => 1], |
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['reservation_uid' => null], |
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['<=', 'updated_at', new Expression(sprintf('DATE_ADD(NOW(), INTERVAL %s SECOND)', (int)$this->restTime))], |
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]; |
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$columns = [ |
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'reservation_uid' => $uid, |
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'updated_at' => Carbon::now()->toDateTimeString(), |
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]; |
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if (!$ignoreRest) { |
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$condition[] = ['or', |
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['rest_until' => null], |
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new Expression('rest_until<=now()'), |
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]; |
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// btw, if rest is done, can be reset |
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$columns['rests'] = 0; |
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$columns['rest_until'] = null; |
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} |
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$sql = Yii::$app->db->createCommand() |
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->update('proxy', $columns, $condition) |
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->rawSql; |
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$n = Yii::$app->db->createCommand("{$sql} ORDER BY [[updated_at]] ASC LIMIT 1") |
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->execute(); |
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if (empty($n)) { |
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throw new NoProxyAvailableException(); |
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} |
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$proxy = Proxy::findOne(['reservation_uid' => $uid]); |
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if (empty($proxy)) { |
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throw new InvalidConfigException('Something is wrong with \'ProxyManager\'.'); |
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} |
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return $proxy; |
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} |
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public function release(Proxy $proxy, ?bool $rest = null) |
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{ |
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$attributes = ['reservation_uid' => null]; |
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if ($rest === true) { |
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Yii::debug(sprintf("REST: %s\n", "{$proxy->ip}:{$proxy->port}"), __METHOD__); |
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$attributes['rests'] = new Expression('rests+1'); |
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$attributes['rest_until'] = new Expression(sprintf('DATE_ADD(NOW(), INTERVAL rests+%s HOUR)', (int)$this->blockRestTime)); |
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} elseif ($rest === false) { |
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$attributes['rests'] = 0; |
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$attributes['rest_until'] = null; |
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} |
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Proxy::updateAll($attributes, ['id' => $proxy->id]); |
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} |
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protected function generateUid() |
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{ |
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return sprintf('%s_%s', Yii::$app->security->generateRandomString(64), time()); |
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} |
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} |
jakim /
ig-monitoring
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