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<?php |
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namespace carono\checksum; |
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use DOMDocument; |
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use DOMElement; |
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use yii\base\Behavior; |
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use yii\base\ViewEvent; |
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use yii\web\View; |
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/** |
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* Class ChecksumBehavior |
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* |
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* @package carono\checksum |
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*/ |
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class ChecksumBehavior extends Behavior |
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{ |
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/** |
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* @return array |
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*/ |
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public function events() |
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{ |
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return [ |
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View::EVENT_AFTER_RENDER => 'registerChecksumField' |
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]; |
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} |
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/** |
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* @param \yii\base\WidgetEvent $event |
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*/ |
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public function registerChecksumField(ViewEvent $event) |
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{ |
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/** |
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* @var DOMElement $form |
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* @var DOMElement $element |
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* @var Request $request |
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*/ |
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if (!$event->output) { |
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return; |
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} |
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$output = mb_convert_encoding($event->output, 'HTML-ENTITIES', 'UTF-8'); |
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$document = new DOMDocument(); |
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$document->loadHTML($output, LIBXML_NOERROR); |
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$xpath = new \DOMXPath($document); |
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$request = \Yii::$app->request; |
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foreach ($xpath->query("//form[@method='post']") as $form) { |
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$items = []; |
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foreach ($xpath->query('//input|//select|//textarea', $form) as $element) { |
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$items[] = $element->getAttribute('name'); |
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} |
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$items = array_unique($items); |
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parse_str(implode('&', $items), $stack); |
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$checksum = $request->setStack($stack); |
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$input = $document->createElement('input'); |
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$input->setAttribute('name', \Yii::$app->request->checksumParam); |
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$input->setAttribute('value', $checksum); |
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$input->setAttribute('type', 'hidden'); |
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$form->appendChild($input); |
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} |
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$event->output = $document->saveHTML(); |
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} |
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} |
carono /
yii2-request-checksum
