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<?php |
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namespace Yiisoft\Validator\Rule; |
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use Yiisoft\Validator\DataSetInterface; |
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use Yiisoft\Validator\Result; |
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use Yiisoft\Validator\Rule; |
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/** |
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* UrlValidator validates that the attribute value is a valid http or https URL. |
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* |
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* Note that this validator only checks if the URL scheme and host part are correct. |
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* It does not check the remaining parts of a URL. |
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*/ |
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class Url extends Rule |
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{ |
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/** |
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* @var string the regular expression used to validateValue the attribute value. |
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* The pattern may contain a `{schemes}` token that will be replaced |
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* by a regular expression which represents the [[validSchemes]]. |
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*/ |
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private $pattern = '/^{schemes}:\/\/(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(?::\d{1,5})?(?:$|[?\/#])/i'; |
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/** |
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* @var array list of URI schemes which should be considered valid. By default, http and https |
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* are considered to be valid schemes. |
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*/ |
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private $validSchemes = ['http', 'https']; |
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/** |
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* @var bool whether validation process should take into account IDN (internationalized |
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* domain names). Defaults to false meaning that validation of URLs containing IDN will always |
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* fail. Note that in order to use IDN validation you have to install and enable `intl` PHP |
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* extension, otherwise an exception would be thrown. |
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*/ |
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private $enableIDN = false; |
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private $message; |
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public function __construct() |
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{ |
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if ($this->enableIDN && !function_exists('idn_to_ascii')) { |
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throw new \RuntimeException('In order to use IDN validation intl extension must be installed and enabled.'); |
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} |
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$this->message = '{attribute} is not a valid URL.'; |
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} |
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protected function validateValue($value, DataSetInterface $dataSet = null): Result |
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{ |
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$result = new Result(); |
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// make sure the length is limited to avoid DOS attacks |
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if (is_string($value) && strlen($value) < 2000) { |
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if (strpos($this->pattern, '{schemes}') !== false) { |
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$pattern = str_replace('{schemes}', '(' . implode('|', $this->validSchemes) . ')', $this->pattern); |
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} else { |
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$pattern = $this->pattern; |
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} |
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if ($this->enableIDN) { |
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$value = preg_replace_callback('/:\/\/([^\/]+)/', function ($matches) { |
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return '://' . $this->idnToAscii($matches[1]); |
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}, $value); |
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} |
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if (preg_match($pattern, $value)) { |
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return $result; |
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} |
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} |
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return $result->addError($this->formatMessage($this->message)); |
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} |
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private function idnToAscii($idn) |
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{ |
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return idn_to_ascii($idn, 0, INTL_IDNA_VARIANT_UTS46); |
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} |
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public function pattern(string $pattern): self |
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{ |
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$this->pattern = $pattern; |
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return $this; |
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} |
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public function enableIDN(): self |
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{ |
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$this->enableIDN = true; |
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return $this; |
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} |
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public function schemes(array $schemes): self |
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{ |
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$this->validSchemes = $schemes; |
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return $this; |
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} |
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public function message(string $message): self |
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{ |
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$this->message = $message; |
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return $this; |
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} |
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} |
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yiisoft /
validator
