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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2019 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\TemplateChecks; |
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use DOMAttr; |
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use DOMElement; |
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use DOMText; |
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use s9e\TextFormatter\Configurator\Helpers\TemplateHelper; |
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use s9e\TextFormatter\Configurator\Items\Attribute; |
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use s9e\TextFormatter\Configurator\Items\Tag; |
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/** |
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* This primary use of this check is to ensure that dynamic content cannot be used to create |
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* javascript: links |
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*/ |
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class DisallowUnsafeDynamicURL extends AbstractDynamicContentCheck |
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{ |
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/** |
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* @var string Regexp used to exclude nodes that start with a hardcoded scheme part, a hardcoded |
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* local part, or a fragment |
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*/ |
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protected $exceptionRegexp = '(^(?:(?!data|\\w*script)\\w+:|[^:]*/|#))i'; |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function getNodes(DOMElement $template) |
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{ |
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return TemplateHelper::getURLNodes($template->ownerDocument); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function isSafe(Attribute $attribute) |
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{ |
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return $attribute->isSafeAsURL(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function checkAttributeNode(DOMAttr $attribute, Tag $tag) |
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{ |
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// Ignore this attribute if its scheme is hardcoded or it starts with // |
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if (!preg_match($this->exceptionRegexp, $attribute->value)) |
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{ |
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parent::checkAttributeNode($attribute, $tag); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function checkElementNode(DOMElement $element, Tag $tag) |
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{ |
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// Ignore this element if its scheme is hardcoded or it starts with // |
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if ($element->firstChild |
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&& $element->firstChild instanceof DOMText |
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&& preg_match($this->exceptionRegexp, $element->firstChild->textContent)) |
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{ |
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return; |
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} |
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parent::checkElementNode($element, $tag); |
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} |
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} |
s9e /
TextFormatter
