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218 lines
8.1 KiB
PHP
218 lines
8.1 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\validators;
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use Yii;
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use yii\base\ErrorException;
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use yii\base\InvalidConfigException;
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use yii\helpers\Json;
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use yii\web\JsExpression;
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/**
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* EmailValidator validates that the attribute value is a valid email address.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class EmailValidator extends Validator
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{
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/**
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* @var string the regular expression used to validate the attribute value.
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* @see http://www.regular-expressions.info/email.html
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*/
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public $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/';
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/**
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* @var string the regular expression used to validate email addresses with the name part.
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* This property is used only when [[allowName]] is true.
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* @see allowName
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*/
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public $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?>$/';
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/**
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* @var string the regular expression used to validate the part before the @ symbol, used if ASCII conversion fails to validate the address.
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* @see http://www.regular-expressions.info/email.html
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* @since 2.0.42
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*/
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public $patternASCII = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*$/';
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/**
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* @var string the regular expression used to validate email addresses with the name part before the @ symbol, used if ASCII conversion fails to validate the address.
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* This property is used only when [[allowName]] is true.
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* @see allowName
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* @since 2.0.42
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*/
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public $fullPatternASCII = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*$/';
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/**
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* @var bool whether to allow name in the email address (e.g. "John Smith <john.smith@example.com>"). Defaults to false.
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* @see fullPattern
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*/
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public $allowName = false;
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/**
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* @var bool whether to check whether the email's domain exists and has either an A or MX record.
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* Be aware that this check can fail due to temporary DNS problems even if the email address is
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* valid and an email would be deliverable. Defaults to false.
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*/
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public $checkDNS = false;
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/**
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* @var bool whether validation process should take into account IDN (internationalized domain
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* names). Defaults to false meaning that validation of emails containing IDN will always fail.
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* Note that in order to use IDN validation you have to install and enable `intl` PHP extension,
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* otherwise an exception would be thrown.
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*/
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public $enableIDN = false;
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/**
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* @var bool whether [[enableIDN]] should apply to the local part of the email (left side
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* of the `@`). Only applies if [[enableIDN]] is `true`.
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* @since 2.0.43
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*/
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public $enableLocalIDN = true;
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/**
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* {@inheritdoc}
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*/
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public function init()
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{
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parent::init();
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if ($this->enableIDN && !function_exists('idn_to_ascii')) {
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throw new InvalidConfigException('In order to use IDN validation intl extension must be installed and enabled.');
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}
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if ($this->message === null) {
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$this->message = Yii::t('yii', '{attribute} is not a valid email address.');
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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 validateValue($value)
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{
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if (!is_string($value)) {
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$valid = false;
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} elseif (!preg_match('/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', $value, $matches)) {
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$valid = false;
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} else {
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if ($this->enableIDN) {
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if ($this->enableLocalIDN) {
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$matches['local'] = $this->idnToAsciiWithFallback($matches['local']);
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}
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$matches['domain'] = $this->idnToAscii($matches['domain']);
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$value = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close'];
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}
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if (strlen($matches['local']) > 64) {
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// The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1
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// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1
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$valid = false;
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} elseif (strlen($matches['local'] . '@' . $matches['domain']) > 254) {
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// There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands
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// of 254 characters. Since addresses that do not fit in those fields are not normally useful, the
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// upper limit on address lengths should normally be considered to be 254.
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//
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// Dominic Sayers, RFC 3696 erratum 1690
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// http://www.rfc-editor.org/errata_search.php?eid=1690
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$valid = false;
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} else {
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$valid = preg_match($this->pattern, $value) || ($this->allowName && preg_match($this->fullPattern, $value));
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if ($valid && $this->checkDNS) {
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$valid = $this->isDNSValid($matches['domain']);
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}
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}
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}
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return $valid ? null : [$this->message, []];
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}
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/**
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* @param string $domain
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* @return bool if DNS records for domain are valid
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* @see https://github.com/yiisoft/yii2/issues/17083
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*/
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protected function isDNSValid($domain)
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{
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return $this->hasDNSRecord($domain, true) || $this->hasDNSRecord($domain, false);
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}
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private function hasDNSRecord($domain, $isMX)
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{
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$normalizedDomain = $domain . '.';
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if (!checkdnsrr($normalizedDomain, ($isMX ? 'MX' : 'A'))) {
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return false;
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}
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try {
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// dns_get_record can return false and emit Warning that may or may not be converted to ErrorException
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$records = dns_get_record($normalizedDomain, ($isMX ? DNS_MX : DNS_A));
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} catch (ErrorException $exception) {
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return false;
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}
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return !empty($records);
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}
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private function idnToAscii($idn)
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{
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if (PHP_VERSION_ID < 50600) {
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// TODO: drop old PHP versions support
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return idn_to_ascii($idn);
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}
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return idn_to_ascii($idn, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46);
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}
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/**
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* {@inheritdoc}
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*/
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public function clientValidateAttribute($model, $attribute, $view)
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{
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ValidationAsset::register($view);
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if ($this->enableIDN) {
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PunycodeAsset::register($view);
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}
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$options = $this->getClientOptions($model, $attribute);
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return 'yii.validation.email(value, messages, ' . Json::htmlEncode($options) . ');';
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}
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/**
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* {@inheritdoc}
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*/
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public function getClientOptions($model, $attribute)
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{
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$options = [
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'pattern' => new JsExpression($this->pattern),
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'fullPattern' => new JsExpression($this->fullPattern),
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'allowName' => $this->allowName,
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'message' => $this->formatMessage($this->message, [
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'attribute' => $model->getAttributeLabel($attribute),
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]),
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'enableIDN' => (bool) $this->enableIDN,
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];
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if ($this->skipOnEmpty) {
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$options['skipOnEmpty'] = 1;
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}
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return $options;
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}
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/**
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* @param string $value
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* @return string|bool returns string if it is valid and/or can be converted, bool false if it can't be converted and/or is invalid
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* @see https://github.com/yiisoft/yii2/issues/18585
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*/
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private function idnToAsciiWithFallback($value)
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{
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$ascii = $this->idnToAscii($value);
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if ($ascii === false) {
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if (preg_match($this->patternASCII, $value) || ($this->allowName && preg_match($this->fullPatternASCII, $value))) {
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return $value;
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}
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}
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return $ascii;
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}
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}
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