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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Validator\Rule; |
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use Yiisoft\Validator\HasValidationErrorMessage; |
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use Yiisoft\Validator\Result; |
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use Yiisoft\Validator\Rule; |
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use Yiisoft\Validator\ValidationContext; |
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use function is_string; |
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use function strlen; |
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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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use HasValidationErrorMessage; |
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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 {@see schemes()}. |
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*/ |
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private string $pattern = '/^{schemes}:\/\/(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(?::\d{1,5})?(?:$|[?\/#])/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 array $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 bool $enableIDN = false; |
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private string $message = 'This value is not a valid URL.'; |
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public static function rule(): self |
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{ |
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return new self(); |
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} |
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protected function validateValue($value, ValidationContext $context = null): Result |
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{ |
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$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 ($this->enableIDN) { |
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$value = $this->convertIdn($value); |
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} |
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if (preg_match($this->getPattern(), $value)) { |
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return $result; |
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} |
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} |
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$result->addError($this->formatMessage($this->message)); |
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return $result; |
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} |
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private function idnToAscii(string $idn): string |
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{ |
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$result = idn_to_ascii($idn, 0, INTL_IDNA_VARIANT_UTS46); |
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return $result === false ? '' : $result; |
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} |
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private function convertIdn(string $value): string |
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{ |
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if (strpos($value, '://') === false) { |
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return $this->idnToAscii($value); |
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} |
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return preg_replace_callback( |
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'/:\/\/([^\/]+)/', |
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fn ($matches) => '://' . $this->idnToAscii($matches[1]), |
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$value |
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); |
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} |
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private function getPattern(): string |
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{ |
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if (strpos($this->pattern, '{schemes}') !== false) { |
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return str_replace('{schemes}', '(' . implode('|', $this->validSchemes) . ')', $this->pattern); |
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} |
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return $this->pattern; |
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} |
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public function pattern(string $pattern): self |
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{ |
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$new = clone $this; |
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$new->pattern = $pattern; |
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return $new; |
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} |
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public function enableIDN(): self |
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{ |
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if (!function_exists('idn_to_ascii')) { |
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throw new \RuntimeException('In order to use IDN validation intl extension must be installed and enabled.'); |
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} |
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$new = clone $this; |
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$new->enableIDN = true; |
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return $new; |
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} |
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public function schemes(array $schemes): self |
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{ |
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$new = clone $this; |
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$new->validSchemes = $schemes; |
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return $new; |
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} |
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public function getOptions(): array |
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{ |
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return array_merge( |
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parent::getOptions(), |
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[ |
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'message' => $this->formatMessage($this->message), |
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'enableIDN' => $this->enableIDN, |
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'validSchemes' => $this->validSchemes, |
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'pattern' => $this->pattern, |
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], |
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); |
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} |
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} |
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yiisoft /
validator
