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symfonyaml
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[Validator] Add Yaml constraint for validating DATA-URI content
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‎src/Symfony/Component/Validator/Constraints/DataUri.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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/**
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* Validates that a value is a valid data URI string.
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*
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* @author Kev <https://github.com/symfonyaml>
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*/
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#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
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class DataUri extends Constraint
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{
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public const INVALID_DATA_URI_ERROR = 'b9e175d1-8d7a-4e28-bf65-ad2448a3b3cf';
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protected const ERROR_NAMES = [
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self::INVALID_DATA_URI_ERROR => 'INVALID_DATA_URI_ERROR',
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];
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public string $message = 'This value is not a valid data URI.';
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/**
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* @param array<string,mixed>|null $options
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* @param string[]|null $groups
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*/
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public function __construct(
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?array $options = null,
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?string $message = null,
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?array $groups = null,
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mixed $payload = null,
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) {
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parent::__construct($options ?? [], $groups, $payload);
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$this->message = $message ?? $this->message;
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}
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}

‎src/Symfony/Component/Validator/Constraints/DataUriValidator.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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use Symfony\Component\Validator\ConstraintValidator;
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use Symfony\Component\Validator\Exception\UnexpectedTypeException;
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use Symfony\Component\Validator\Exception\UnexpectedValueException;
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/**
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* @author Kev <https://github.com/symfonyaml>
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* @see https://datatracker.ietf.org/doc/html/rfc2397
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*/
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class DataUriValidator extends ConstraintValidator
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{
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/** maximum number of characters allowed in a error message */
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private const MAX_MESSAGE_VALUE_LENGTH = 30;
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/** data-uri regexp */
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public const PATTERN = '~^
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data:
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(?:\w+\/(?:(?!;).)+)? # MIME-type
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(?:;[\w\W]*?[^;])* # parameters
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(;base64)? # encoding
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,
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[^$]+ # data
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$~ixuD';
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public function validate(mixed $value, Constraint $constraint): void
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{
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if (!$constraint instanceof DataUri) {
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throw new UnexpectedTypeException($constraint, DataUri::class);
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}
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if (null === $value || '' === $value) {
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return;
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}
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if (!\is_scalar($value) && !$value instanceof \Stringable) {
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throw new UnexpectedValueException($value, 'string');
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}
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$value = (string) $value;
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if ('' === $value) {
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return;
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}
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if (!preg_match(static::PATTERN, $value)) {
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if (strlen($value) > self::MAX_MESSAGE_VALUE_LENGTH) {
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$value = sprintf('%s (truncated)', $this->formatValue(substr($value, 0, self::MAX_MESSAGE_VALUE_LENGTH) . '...'));
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} else {
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$value = $this->formatValue($value);
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}
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$this->context->buildViolation($constraint->message)
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->setParameter('{{ value }}', $value)
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->setCode(DataUri::INVALID_DATA_URI_ERROR)
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->addViolation();
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}
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}
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}

‎src/Symfony/Component/Validator/Tests/Constraints/DataUriValidatorTest.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Tests\Constraints;
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use Symfony\Component\Validator\Constraints\DataUri;
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use Symfony\Component\Validator\Constraints\DataUriValidator;
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use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
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/**
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* @author Kev <https://github.com/symfonyaml>
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*/
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class DataUriValidatorTest extends ConstraintValidatorTestCase
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{
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protected function createValidator(): DataUriValidator
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{
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return new DataUriValidator();
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}
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public function testNullIsValid()
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{
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$this->validator->validate(null, new DataUri());
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$this->assertNoViolation();
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}
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public function testBlankIsValid()
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{
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$this->validator->validate('', new DataUri());
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$this->assertNoViolation();
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}
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/**
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* @dataProvider getValidValues
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*/
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public function testValidValues(string $value)
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{
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$this->validator->validate($value, new DataUri());
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$this->assertNoViolation();
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}
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public static function getValidValues()
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{
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return [
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'mime type is omitted' => ['data:,FooBar'],
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'just charset' => ['data:;charset=UTF-8,FooBar'],
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'plain text' => ['data:text/plain;base64,SGVsbG8sIFdvcmxkIQ=='],
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'text html' => ['data:text/html,%3Ch1%3EHello%2C%20World%21%3C%2Fh1%3E'],
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'plain text with charset' => ['data:text/plain;charset=UTF-8,the%20data:1234,5678'],
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'with meta key=value' => ['data:image/jpeg;key=value;base64,UEsDBBQAAAAI'],
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'without base64 key name' => ['data:image/jpeg;key=value,UEsDBBQAAAAI'],
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'jpeg image' => ['data:image/jpeg;base64,/9j/4AAQSkZJRgABAgAAZABkAAD'],
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'png image' => ['data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='],
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'gif image' => ['data:image/gif;base64,R0lGODlhyAAiALM...DfD0QAADs='],
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'svg' => ['data:image/svg+xml,%3Csvg%20version%3D%221.1%22%3E%3C%2Fsvg%3E'],
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'networking applications' => ['data:application/vnd-xxx-query,select_vcount,fcol_from_fieldtable/local,123456789'],
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];
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}
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/**
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* @dataProvider getInvalidValues
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*/
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public function testInvalidValues($value, $valueAsString)
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{
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$constraint = new DataUri([
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'message' => 'myMessage',
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]);
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$this->validator->validate($value, $constraint);
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$this->buildViolation('myMessage')
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->setParameter('{{ value }}', $valueAsString)
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->setCode(DataUri::INVALID_DATA_URI_ERROR)
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->assertRaised();
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}
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public static function getInvalidValues()
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{
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return [
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'random string' => ['foobar', '"foobar"'],
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'zero' => [0, '"0"'],
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'integer' => [1234, '"1234"'],
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'truncated invalid value' => [
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'1234567890123456789012345678901', // 31 chars
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'"123456789012345678901234567890..." (truncated)',
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],
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];
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}
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}

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