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