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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\XML; |
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use DOMDocument; |
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use SimpleSAML\Assert\Assert; |
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use SimpleSAML\XML\Exception\IOException; |
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use SimpleSAML\XML\Exception\SchemaViolationException; |
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use function array_unique; |
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use function defined; |
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use function file_exists; |
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use function implode; |
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use function libxml_get_errors; |
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use function restore_error_handler; |
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use function set_error_handler; |
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use function sprintf; |
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use function trim; |
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/** |
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* trait class to be used by all the classes that implement the SchemaValidatableElementInterface |
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* |
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* @package simplesamlphp/xml-common |
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*/ |
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trait SchemaValidatableElementTrait |
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{ |
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/** |
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* Validate the given DOMDocument against the schema set for this element |
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* |
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* @return \DOMDocument |
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* @throws \SimpleSAML\XML\Exception\SchemaViolationException |
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*/ |
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public static function schemaValidate(DOMDocument $document): DOMDocument |
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{ |
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$schemaFile = self::getSchemaFile(); |
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// Dirty trick to catch the warnings emitted by XML-DOMs schemaValidate |
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// This will turn the warning into an exception |
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set_error_handler(static function (int $errno, string $errstr): never { |
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throw new SchemaViolationException($errstr, $errno); |
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}, E_WARNING); |
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try { |
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$result = $document->schemaValidate($schemaFile); |
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} finally { |
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// Restore the error handler, whether we throw an exception or not |
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restore_error_handler(); |
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} |
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$msgs = []; |
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if ($result === false) { |
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foreach (libxml_get_errors() as $err) { |
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$msgs[] = trim($err->message) . ' on line ' . $err->line; |
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} |
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throw new SchemaViolationException(sprintf( |
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"XML schema validation errors:\n - %s", |
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implode("\n - ", array_unique($msgs)), |
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)); |
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} |
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return $document; |
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} |
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/** |
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* Get the schema file that can validate this element. |
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* The path must be relative to the project's base directory. |
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* |
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* @return string |
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*/ |
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public static function getSchemaFile(): string |
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{ |
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if (defined('static::SCHEMA')) { |
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$schemaFile = static::SCHEMA; |
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} |
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Assert::true(file_exists($schemaFile), sprintf("File not found: %s", $schemaFile), IOException::class); |
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return $schemaFile; |
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} |
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} |
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simplesamlphp /
xml-common
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