vendor/symfony/serializer/Encoder/XmlEncoder.php line 71
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\Serializer\Encoder;use Symfony\Component\Serializer\Exception\BadMethodCallException;use Symfony\Component\Serializer\Exception\NotEncodableValueException;use Symfony\Component\Serializer\SerializerAwareInterface;use Symfony\Component\Serializer\SerializerAwareTrait;/*** @author Jordi Boggiano <j.boggiano@seld.be>* @author John Wards <jwards@whiteoctober.co.uk>* @author Fabian Vogler <fabian@equivalence.ch>* @author Kévin Dunglas <dunglas@gmail.com>* @author Dany Maillard <danymaillard93b@gmail.com>*/class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwareInterface, SerializerAwareInterface{use SerializerAwareTrait;public const FORMAT = 'xml';public const AS_COLLECTION = 'as_collection';/*** An array of ignored XML node types while decoding, each one of the DOM Predefined XML_* constants.*/public const DECODER_IGNORED_NODE_TYPES = 'decoder_ignored_node_types';/*** An array of ignored XML node types while encoding, each one of the DOM Predefined XML_* constants.*/public const ENCODER_IGNORED_NODE_TYPES = 'encoder_ignored_node_types';public const ENCODING = 'xml_encoding';public const FORMAT_OUTPUT = 'xml_format_output';/*** A bit field of LIBXML_* constants.*/public const LOAD_OPTIONS = 'load_options';public const REMOVE_EMPTY_TAGS = 'remove_empty_tags';public const ROOT_NODE_NAME = 'xml_root_node_name';public const STANDALONE = 'xml_standalone';public const TYPE_CAST_ATTRIBUTES = 'xml_type_cast_attributes';public const VERSION = 'xml_version';private $defaultContext = [self::AS_COLLECTION => false,self::DECODER_IGNORED_NODE_TYPES => [\XML_PI_NODE, \XML_COMMENT_NODE],self::ENCODER_IGNORED_NODE_TYPES => [],self::LOAD_OPTIONS => \LIBXML_NONET | \LIBXML_NOBLANKS,self::REMOVE_EMPTY_TAGS => false,self::ROOT_NODE_NAME => 'response',self::TYPE_CAST_ATTRIBUTES => true,];public function __construct(array $defaultContext = []){$this->defaultContext = array_merge($this->defaultContext, $defaultContext);}public function encode(mixed $data, string $format, array $context = []): string{$encoderIgnoredNodeTypes = $context[self::ENCODER_IGNORED_NODE_TYPES] ?? $this->defaultContext[self::ENCODER_IGNORED_NODE_TYPES];$ignorePiNode = \in_array(\XML_PI_NODE, $encoderIgnoredNodeTypes, true);if ($data instanceof \DOMDocument) {return $data->saveXML($ignorePiNode ? $data->documentElement : null);}$xmlRootNodeName = $context[self::ROOT_NODE_NAME] ?? $this->defaultContext[self::ROOT_NODE_NAME];$dom = $this->createDomDocument($context);if (null !== $data && !\is_scalar($data)) {$root = $dom->createElement($xmlRootNodeName);$dom->appendChild($root);$this->buildXml($root, $data, $format, $context, $xmlRootNodeName);} else {$this->appendNode($dom, $data, $format, $context, $xmlRootNodeName);}return $dom->saveXML($ignorePiNode ? $dom->documentElement : null);}public function decode(string $data, string $format, array $context = []): mixed{if ('' === trim($data)) {throw new NotEncodableValueException('Invalid XML data, it cannot be empty.');}$internalErrors = libxml_use_internal_errors(true);libxml_clear_errors();$dom = new \DOMDocument();$dom->loadXML($data, $context[self::LOAD_OPTIONS] ?? $this->defaultContext[self::LOAD_OPTIONS]);libxml_use_internal_errors($internalErrors);if ($error = libxml_get_last_error()) {libxml_clear_errors();throw new NotEncodableValueException($error->message);}$rootNode = null;$decoderIgnoredNodeTypes = $context[self::DECODER_IGNORED_NODE_TYPES] ?? $this->defaultContext[self::DECODER_IGNORED_NODE_TYPES];foreach ($dom->childNodes as $child) {if (\in_array($child->nodeType, $decoderIgnoredNodeTypes, true)) {continue;}if (\XML_DOCUMENT_TYPE_NODE === $child->nodeType) {throw new NotEncodableValueException('Document types are not allowed.');}if (!$rootNode) {$rootNode = $child;}}// todo: throw an exception if the root node name is not correctly configured (bc)if ($rootNode->hasChildNodes()) {$xpath = new \DOMXPath($dom);$data = [];foreach ($xpath->query('namespace::*', $dom->documentElement) as $nsNode) {$data['@'.$nsNode->nodeName] = $nsNode->nodeValue;}unset($data['@xmlns:xml']);if (empty($data)) {return $this->parseXml($rootNode, $context);}return array_merge($data, (array) $this->parseXml($rootNode, $context));}if (!$rootNode->hasAttributes()) {return $rootNode->nodeValue;}$data = [];foreach ($rootNode->attributes as $attrKey => $attr) {$data['@'.$attrKey] = $attr->nodeValue;}$data['#'] = $rootNode->nodeValue;return $data;}public function supportsEncoding(string $format): bool{return self::FORMAT === $format;}public function supportsDecoding(string $format): bool{return self::FORMAT === $format;}final protected function appendXMLString(\DOMNode $node, string $val): bool{if ('' !== $val) {$frag = $node->ownerDocument->createDocumentFragment();$frag->appendXML($val);$node->appendChild($frag);return true;}return false;}final protected function appendText(\DOMNode $node, string $val): bool{$nodeText = $node->ownerDocument->createTextNode($val);$node->appendChild($nodeText);return true;}final protected function appendCData(\DOMNode $node, string $val): bool{$nodeText = $node->ownerDocument->createCDATASection($val);$node->appendChild($nodeText);return true;}final protected function appendDocumentFragment(\DOMNode $node, \DOMDocumentFragment $fragment): bool{if ($fragment instanceof \DOMDocumentFragment) {$node->appendChild($fragment);return true;}return false;}final protected function appendComment(\DOMNode $node, string $data): bool{$node->appendChild($node->ownerDocument->createComment($data));return true;}/*** Checks the name is a valid xml element name.*/final protected function isElementNameValid(string $name): bool{return $name &&!str_contains($name, ' ') &&preg_match('#^[\pL_][\pL0-9._:-]*$#ui', $name);}/*** Parse the input DOMNode into an array or a string.*/private function parseXml(\DOMNode $node, array $context = []): array|string{$data = $this->parseXmlAttributes($node, $context);$value = $this->parseXmlValue($node, $context);if (!\count($data)) {return $value;}if (!\is_array($value)) {$data['#'] = $value;return $data;}if (1 === \count($value) && key($value)) {$data[key($value)] = current($value);return $data;}foreach ($value as $key => $val) {$data[$key] = $val;}return $data;}/*** Parse the input DOMNode attributes into an array.*/private function parseXmlAttributes(\DOMNode $node, array $context = []): array{if (!$node->hasAttributes()) {return [];}$data = [];$typeCastAttributes = (bool) ($context[self::TYPE_CAST_ATTRIBUTES] ?? $this->defaultContext[self::TYPE_CAST_ATTRIBUTES]);foreach ($node->attributes as $attr) {if (!is_numeric($attr->nodeValue) || !$typeCastAttributes || (isset($attr->nodeValue[1]) && '0' === $attr->nodeValue[0] && '.' !== $attr->nodeValue[1])) {$data['@'.$attr->nodeName] = $attr->nodeValue;continue;}if (false !== $val = filter_var($attr->nodeValue, \FILTER_VALIDATE_INT)) {$data['@'.$attr->nodeName] = $val;continue;}$data['@'.$attr->nodeName] = (float) $attr->nodeValue;}return $data;}/*** Parse the input DOMNode value (content and children) into an array or a string.*/private function parseXmlValue(\DOMNode $node, array $context = []): array|string{if (!$node->hasChildNodes()) {return $node->nodeValue;}if (1 === $node->childNodes->length && \in_array($node->firstChild->nodeType, [\XML_TEXT_NODE, \XML_CDATA_SECTION_NODE])) {return $node->firstChild->nodeValue;}$value = [];$decoderIgnoredNodeTypes = $context[self::DECODER_IGNORED_NODE_TYPES] ?? $this->defaultContext[self::DECODER_IGNORED_NODE_TYPES];foreach ($node->childNodes as $subnode) {if (\in_array($subnode->nodeType, $decoderIgnoredNodeTypes, true)) {continue;}$val = $this->parseXml($subnode, $context);if ('item' === $subnode->nodeName && isset($val['@key'])) {$value[$val['@key']] = $val['#'] ?? $val;} else {$value[$subnode->nodeName][] = $val;}}$asCollection = $context[self::AS_COLLECTION] ?? $this->defaultContext[self::AS_COLLECTION];foreach ($value as $key => $val) {if (!$asCollection && \is_array($val) && 1 === \count($val)) {$value[$key] = current($val);}}return $value;}/*** Parse the data and convert it to DOMElements.** @throws NotEncodableValueException*/private function buildXml(\DOMNode $parentNode, mixed $data, string $format, array $context, string $xmlRootNodeName = null): bool{$append = true;$removeEmptyTags = $context[self::REMOVE_EMPTY_TAGS] ?? $this->defaultContext[self::REMOVE_EMPTY_TAGS] ?? false;$encoderIgnoredNodeTypes = $context[self::ENCODER_IGNORED_NODE_TYPES] ?? $this->defaultContext[self::ENCODER_IGNORED_NODE_TYPES];if (\is_array($data) || ($data instanceof \Traversable && (null === $this->serializer || !$this->serializer->supportsNormalization($data, $format)))) {foreach ($data as $key => $data) {// Ah this is the magic @ attribute types.if (str_starts_with($key, '@') && $this->isElementNameValid($attributeName = substr($key, 1))) {if (!\is_scalar($data)) {$data = $this->serializer->normalize($data, $format, $context);}if (\is_bool($data)) {$data = (int) $data;}$parentNode->setAttribute($attributeName, $data);} elseif ('#' === $key) {$append = $this->selectNodeType($parentNode, $data, $format, $context);} elseif ('#comment' === $key) {if (!\in_array(\XML_COMMENT_NODE, $encoderIgnoredNodeTypes, true)) {$append = $this->appendComment($parentNode, $data);}} elseif (\is_array($data) && false === is_numeric($key)) {// Is this array fully numeric keys?if (ctype_digit(implode('', array_keys($data)))) {/** Create nodes to append to $parentNode based on the $key of this array* Produces <xml><item>0</item><item>1</item></xml>* From ["item" => [0,1]];.*/foreach ($data as $subData) {$append = $this->appendNode($parentNode, $subData, $format, $context, $key);}} else {$append = $this->appendNode($parentNode, $data, $format, $context, $key);}} elseif (is_numeric($key) || !$this->isElementNameValid($key)) {$append = $this->appendNode($parentNode, $data, $format, $context, 'item', $key);} elseif (null !== $data || !$removeEmptyTags) {$append = $this->appendNode($parentNode, $data, $format, $context, $key);}}return $append;}if (\is_object($data)) {if (null === $this->serializer) {throw new BadMethodCallException(sprintf('The serializer needs to be set to allow "%s()" to be used with object data.', __METHOD__));}$data = $this->serializer->normalize($data, $format, $context);if (null !== $data && !\is_scalar($data)) {return $this->buildXml($parentNode, $data, $format, $context, $xmlRootNodeName);}// top level data object was normalized into a scalarif (!$parentNode->parentNode->parentNode) {$root = $parentNode->parentNode;$root->removeChild($parentNode);return $this->appendNode($root, $data, $format, $context, $xmlRootNodeName);}return $this->appendNode($parentNode, $data, $format, $context, 'data');}throw new NotEncodableValueException('An unexpected value could not be serialized: '.(!\is_resource($data) ? var_export($data, true) : sprintf('%s resource', get_resource_type($data))));}/*** Selects the type of node to create and appends it to the parent.*/private function appendNode(\DOMNode $parentNode, mixed $data, string $format, array $context, string $nodeName, string $key = null): bool{$dom = $parentNode instanceof \DOMDocument ? $parentNode : $parentNode->ownerDocument;$node = $dom->createElement($nodeName);if (null !== $key) {$node->setAttribute('key', $key);}$appendNode = $this->selectNodeType($node, $data, $format, $context);// we may have decided not to append this node, either in error or if its $nodeName is not validif ($appendNode) {$parentNode->appendChild($node);}return $appendNode;}/*** Checks if a value contains any characters which would require CDATA wrapping.*/private function needsCdataWrapping(string $val): bool{return preg_match('/[<>&]/', $val);}/*** Tests the value being passed and decide what sort of element to create.** @throws NotEncodableValueException*/private function selectNodeType(\DOMNode $node, mixed $val, string $format, array $context): bool{if (\is_array($val)) {return $this->buildXml($node, $val, $format, $context);} elseif ($val instanceof \SimpleXMLElement) {$child = $node->ownerDocument->importNode(dom_import_simplexml($val), true);$node->appendChild($child);} elseif ($val instanceof \Traversable) {$this->buildXml($node, $val, $format, $context);} elseif ($val instanceof \DOMNode) {$child = $node->ownerDocument->importNode($val, true);$node->appendChild($child);} elseif (\is_object($val)) {if (null === $this->serializer) {throw new BadMethodCallException(sprintf('The serializer needs to be set to allow "%s()" to be used with object data.', __METHOD__));}return $this->selectNodeType($node, $this->serializer->normalize($val, $format, $context), $format, $context);} elseif (is_numeric($val)) {return $this->appendText($node, (string) $val);} elseif (\is_string($val) && $this->needsCdataWrapping($val)) {return $this->appendCData($node, $val);} elseif (\is_string($val)) {return $this->appendText($node, $val);} elseif (\is_bool($val)) {return $this->appendText($node, (int) $val);}return true;}/*** Create a DOM document, taking serializer options into account.*/private function createDomDocument(array $context): \DOMDocument{$document = new \DOMDocument();// Set an attribute on the DOM document specifying, as part of the XML declaration,$xmlOptions = [// nicely formats output with indentation and extra spaceself::FORMAT_OUTPUT => 'formatOutput',// the version number of the documentself::VERSION => 'xmlVersion',// the encoding of the documentself::ENCODING => 'encoding',// whether the document is standaloneself::STANDALONE => 'xmlStandalone',];foreach ($xmlOptions as $xmlOption => $documentProperty) {if ($contextOption = $context[$xmlOption] ?? $this->defaultContext[$xmlOption] ?? false) {$document->$documentProperty = $contextOption;}}return $document;}}