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<?php |
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/* |
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* This file is part of the Shieldon package. |
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* |
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* (c) Terry L. <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Shieldon\Firewall\Kernel; |
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use function Shieldon\Firewall\get_session; |
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use function microtime; |
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use function str_replace; |
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use function time; |
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/* |
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* @since 1.0.0 |
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*/ |
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trait LimitSessionTrait |
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{ |
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/** |
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* Is to limit traffic? |
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* |
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* @var array |
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*/ |
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protected $sessionLimit = [ |
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// How many sessions will be available? |
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// 0 = no limit. |
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'count' => 0, |
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// How many minutes will a session be availe to visit? |
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// 0 = no limit. |
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'period' => 0, |
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]; |
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/** |
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* Record the online session status. |
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* This will be enabled when $sessionLimit[count] > 0 |
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* |
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* This array is recording a live data, not a setting value. |
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* |
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* @var array |
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*/ |
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protected $sessionStatus = [ |
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// Online session count. |
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'count' => 0, |
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// Current session order. |
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'order' => 0, |
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// Current waiting queue. |
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'queue' => 0, |
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]; |
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/** |
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* Get online people count. If enable limitSession. |
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* |
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* @return int |
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*/ |
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public function getSessionCount(): int |
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{ |
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return $this->sessionStatus['count']; |
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} |
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/** |
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* Deal with online sessions. |
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* |
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* @param int $statusCode The response code. |
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* |
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* @return int The response code. |
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*/ |
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protected function sessionHandler($statusCode): int |
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{ |
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if (self::RESPONSE_ALLOW !== $statusCode) { |
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return $statusCode; |
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} |
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// If you don't enable `limit traffic`, ignore the following steps. |
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if (empty($this->sessionLimit['count'])) { |
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return self::RESPONSE_ALLOW; |
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} else { |
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// Get the proerties. |
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$limit = (int) ($this->sessionLimit['count'] ?? 0); |
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$period = (int) ($this->sessionLimit['period'] ?? 300); |
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$now = time(); |
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$sessionData = $this->driver->getAll('session'); |
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$sessionPools = []; |
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$i = 1; |
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$sessionOrder = 0; |
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if (!empty($sessionData)) { |
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foreach ($sessionData as $v) { |
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$sessionPools[] = $v['id']; |
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$lasttime = (int) $v['time']; |
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if (get_session()->get('id') === $v['id']) { |
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$sessionOrder = $i; |
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} |
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// Remove session if it expires. |
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if ($now - $lasttime > $period) { |
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$this->driver->delete($v['id'], 'session'); |
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} |
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$i++; |
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} |
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if (0 === $sessionOrder) { |
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$sessionOrder = $i; |
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} |
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} else { |
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$sessionOrder = 0; |
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} |
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// Count the online sessions. |
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$this->sessionStatus['count'] = count($sessionPools); |
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$this->sessionStatus['order'] = $sessionOrder; |
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$this->sessionStatus['queue'] = $sessionOrder - $limit; |
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if (!in_array(get_session()->get('id'), $sessionPools)) { |
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$this->sessionStatus['count']++; |
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// New session, record this data. |
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$data['id'] = get_session()->get('id'); |
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$data['ip'] = $this->ip; |
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$data['time'] = $now; |
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$microtimesamp = explode(' ', microtime()); |
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$microtimesamp = $microtimesamp[1] . str_replace('0.', '', $microtimesamp[0]); |
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$data['microtimesamp'] = $microtimesamp; |
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$this->driver->save(get_session()->get('id'), $data, 'session'); |
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} |
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// Online session count reached the limit. So return RESPONSE_LIMIT_SESSION response code. |
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if ($sessionOrder >= $limit) { |
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return self::RESPONSE_LIMIT_SESSION; |
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} |
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} |
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return self::RESPONSE_ALLOW; |
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} |
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// @codeCoverageIgnoreStart |
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/** |
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* For testing propose. |
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* |
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* @param string $sessionId |
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* |
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* @return void |
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*/ |
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protected function setSessionId(string $sessionId = ''): void |
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{ |
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if ('' !== $sessionId) { |
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get_session()->set('id', $sessionId); |
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} |
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} |
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} |
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terrylinooo /
shieldon
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