290 lines
9.7 KiB
PHP
290 lines
9.7 KiB
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\Config\Util;
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use Symfony\Component\Config\Util\Exception\InvalidXmlException;
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use Symfony\Component\Config\Util\Exception\XmlParsingException;
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/**
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* XMLUtils is a bunch of utility methods to XML operations.
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*
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* This class contains static methods only and is not meant to be instantiated.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Martin Hasoň <martin.hason@gmail.com>
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* @author Ole Rößner <ole@roessner.it>
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*/
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class XmlUtils
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{
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/**
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* This class should not be instantiated.
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*/
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private function __construct()
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{
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}
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/**
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* Parses an XML string.
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*
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* @param string $content An XML string
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* @param string|callable|null $schemaOrCallable An XSD schema file path, a callable, or null to disable validation
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*
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* @return \DOMDocument
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*
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* @throws XmlParsingException When parsing of XML file returns error
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* @throws InvalidXmlException When parsing of XML with schema or callable produces any errors unrelated to the XML parsing itself
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* @throws \RuntimeException When DOM extension is missing
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*/
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public static function parse(string $content, $schemaOrCallable = null)
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{
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if (!\extension_loaded('dom')) {
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throw new \LogicException('Extension DOM is required.');
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}
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$internalErrors = libxml_use_internal_errors(true);
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if (\LIBXML_VERSION < 20900) {
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$disableEntities = libxml_disable_entity_loader(true);
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}
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libxml_clear_errors();
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$dom = new \DOMDocument();
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$dom->validateOnParse = true;
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if (!$dom->loadXML($content, \LIBXML_NONET | (\defined('LIBXML_COMPACT') ? \LIBXML_COMPACT : 0))) {
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if (\LIBXML_VERSION < 20900) {
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libxml_disable_entity_loader($disableEntities);
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}
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throw new XmlParsingException(implode("\n", static::getXmlErrors($internalErrors)));
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}
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$dom->normalizeDocument();
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libxml_use_internal_errors($internalErrors);
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if (\LIBXML_VERSION < 20900) {
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libxml_disable_entity_loader($disableEntities);
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}
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foreach ($dom->childNodes as $child) {
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if (\XML_DOCUMENT_TYPE_NODE === $child->nodeType) {
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throw new XmlParsingException('Document types are not allowed.');
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}
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}
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if (null !== $schemaOrCallable) {
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$internalErrors = libxml_use_internal_errors(true);
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libxml_clear_errors();
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$e = null;
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if (\is_callable($schemaOrCallable)) {
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try {
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$valid = $schemaOrCallable($dom, $internalErrors);
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} catch (\Exception $e) {
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$valid = false;
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}
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} elseif (!\is_array($schemaOrCallable) && is_file((string) $schemaOrCallable)) {
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$schemaSource = file_get_contents((string) $schemaOrCallable);
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$valid = @$dom->schemaValidateSource($schemaSource);
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} else {
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libxml_use_internal_errors($internalErrors);
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throw new XmlParsingException('The schemaOrCallable argument has to be a valid path to XSD file or callable.');
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}
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if (!$valid) {
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$messages = static::getXmlErrors($internalErrors);
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if (empty($messages)) {
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throw new InvalidXmlException('The XML is not valid.', 0, $e);
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}
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throw new XmlParsingException(implode("\n", $messages), 0, $e);
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}
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}
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libxml_clear_errors();
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libxml_use_internal_errors($internalErrors);
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return $dom;
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}
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/**
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* Loads an XML file.
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*
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* @param string $file An XML file path
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* @param string|callable|null $schemaOrCallable An XSD schema file path, a callable, or null to disable validation
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*
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* @return \DOMDocument
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*
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* @throws \InvalidArgumentException When loading of XML file returns error
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* @throws XmlParsingException When XML parsing returns any errors
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* @throws \RuntimeException When DOM extension is missing
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*/
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public static function loadFile(string $file, $schemaOrCallable = null)
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{
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if (!is_file($file)) {
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throw new \InvalidArgumentException(sprintf('Resource "%s" is not a file.', $file));
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}
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if (!is_readable($file)) {
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throw new \InvalidArgumentException(sprintf('File "%s" is not readable.', $file));
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}
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$content = @file_get_contents($file);
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if ('' === trim($content)) {
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throw new \InvalidArgumentException(sprintf('File "%s" does not contain valid XML, it is empty.', $file));
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}
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try {
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return static::parse($content, $schemaOrCallable);
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} catch (InvalidXmlException $e) {
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throw new XmlParsingException(sprintf('The XML file "%s" is not valid.', $file), 0, $e->getPrevious());
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}
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}
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/**
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* Converts a \DOMElement object to a PHP array.
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*
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* The following rules applies during the conversion:
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*
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* * Each tag is converted to a key value or an array
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* if there is more than one "value"
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*
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* * The content of a tag is set under a "value" key (<foo>bar</foo>)
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* if the tag also has some nested tags
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*
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* * The attributes are converted to keys (<foo foo="bar"/>)
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*
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* * The nested-tags are converted to keys (<foo><foo>bar</foo></foo>)
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*
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* @param \DOMElement $element A \DOMElement instance
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* @param bool $checkPrefix Check prefix in an element or an attribute name
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*
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* @return mixed
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*/
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public static function convertDomElementToArray(\DOMElement $element, bool $checkPrefix = true)
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{
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$prefix = (string) $element->prefix;
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$empty = true;
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$config = [];
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foreach ($element->attributes as $name => $node) {
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if ($checkPrefix && !\in_array((string) $node->prefix, ['', $prefix], true)) {
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continue;
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}
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$config[$name] = static::phpize($node->value);
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$empty = false;
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}
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$nodeValue = false;
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foreach ($element->childNodes as $node) {
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if ($node instanceof \DOMText) {
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if ('' !== trim($node->nodeValue)) {
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$nodeValue = trim($node->nodeValue);
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$empty = false;
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}
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} elseif ($checkPrefix && $prefix != (string) $node->prefix) {
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continue;
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} elseif (!$node instanceof \DOMComment) {
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$value = static::convertDomElementToArray($node, $checkPrefix);
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$key = $node->localName;
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if (isset($config[$key])) {
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if (!\is_array($config[$key]) || !\is_int(key($config[$key]))) {
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$config[$key] = [$config[$key]];
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}
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$config[$key][] = $value;
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} else {
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$config[$key] = $value;
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}
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$empty = false;
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}
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}
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if (false !== $nodeValue) {
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$value = static::phpize($nodeValue);
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if (\count($config)) {
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$config['value'] = $value;
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} else {
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$config = $value;
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}
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}
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return !$empty ? $config : null;
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}
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/**
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* Converts an xml value to a PHP type.
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*
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* @param mixed $value
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*
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* @return mixed
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*/
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public static function phpize($value)
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{
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$value = (string) $value;
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$lowercaseValue = strtolower($value);
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switch (true) {
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case 'null' === $lowercaseValue:
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return null;
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case ctype_digit($value):
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case isset($value[1]) && '-' === $value[0] && ctype_digit(substr($value, 1)):
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$raw = $value;
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$cast = (int) $value;
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return self::isOctal($value) ? \intval($value, 8) : (($raw === (string) $cast) ? $cast : $raw);
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case 'true' === $lowercaseValue:
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return true;
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case 'false' === $lowercaseValue:
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return false;
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case isset($value[1]) && '0b' == $value[0].$value[1] && preg_match('/^0b[01]*$/', $value):
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return bindec($value);
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case is_numeric($value):
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return '0x' === $value[0].$value[1] ? hexdec($value) : (float) $value;
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case preg_match('/^0x[0-9a-f]++$/i', $value):
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return hexdec($value);
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case preg_match('/^[+-]?[0-9]+(\.[0-9]+)?$/', $value):
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return (float) $value;
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default:
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return $value;
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}
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}
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protected static function getXmlErrors(bool $internalErrors)
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{
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$errors = [];
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foreach (libxml_get_errors() as $error) {
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$errors[] = sprintf('[%s %s] %s (in %s - line %d, column %d)',
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\LIBXML_ERR_WARNING == $error->level ? 'WARNING' : 'ERROR',
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$error->code,
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trim($error->message),
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$error->file ?: 'n/a',
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$error->line,
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$error->column
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);
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}
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libxml_clear_errors();
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libxml_use_internal_errors($internalErrors);
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return $errors;
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}
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private static function isOctal(string $str): bool
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{
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if ('-' === $str[0]) {
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$str = substr($str, 1);
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}
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return $str === '0'.decoct(\intval($str, 8));
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}
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}
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