525 lines
16 KiB
PHP
525 lines
16 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2020, Friendica
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Util;
|
|
|
|
use DOMXPath;
|
|
use Friendica\Core\Logger;
|
|
use Friendica\Core\System;
|
|
use SimpleXMLElement;
|
|
|
|
/**
|
|
* This class contain methods to work with XML data
|
|
*/
|
|
class XML
|
|
{
|
|
/**
|
|
* Creates an XML structure out of a given array
|
|
*
|
|
* @param array $array The array of the XML structure that will be generated
|
|
* @param object $xml The createdXML will be returned by reference
|
|
* @param bool $remove_header Should the XML header be removed or not?
|
|
* @param array $namespaces List of namespaces
|
|
* @param bool $root interally used parameter. Mustn't be used from outside.
|
|
*
|
|
* @return string The created XML
|
|
*/
|
|
public static function fromArray($array, &$xml, $remove_header = false, $namespaces = [], $root = true)
|
|
{
|
|
if ($root) {
|
|
foreach ($array as $key => $value) {
|
|
foreach ($namespaces as $nskey => $nsvalue) {
|
|
$key .= " xmlns".($nskey == "" ? "":":").$nskey.'="'.$nsvalue.'"';
|
|
}
|
|
|
|
if (is_array($value)) {
|
|
$root = new SimpleXMLElement("<".$key."/>");
|
|
self::fromArray($value, $root, $remove_header, $namespaces, false);
|
|
} else {
|
|
$root = new SimpleXMLElement("<".$key.">".self::escape($value)."</".$key.">");
|
|
}
|
|
|
|
$dom = dom_import_simplexml($root)->ownerDocument;
|
|
$dom->formatOutput = true;
|
|
$xml = $dom;
|
|
|
|
$xml_text = $dom->saveXML();
|
|
|
|
if ($remove_header) {
|
|
$xml_text = trim(substr($xml_text, 21));
|
|
}
|
|
|
|
return $xml_text;
|
|
}
|
|
}
|
|
|
|
$element = null;
|
|
foreach ($array as $key => $value) {
|
|
if (!isset($element) && isset($xml)) {
|
|
$element = $xml;
|
|
}
|
|
|
|
if (is_integer($key)) {
|
|
if (isset($element)) {
|
|
if (is_scalar($value)) {
|
|
$element[0] = $value;
|
|
} else {
|
|
/// @todo: handle nested array values
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
$element_parts = explode(":", $key);
|
|
if ((count($element_parts) > 1) && isset($namespaces[$element_parts[0]])) {
|
|
$namespace = $namespaces[$element_parts[0]];
|
|
} elseif (isset($namespaces[""])) {
|
|
$namespace = $namespaces[""];
|
|
} else {
|
|
$namespace = null;
|
|
}
|
|
|
|
// Remove undefined namespaces from the key
|
|
if ((count($element_parts) > 1) && is_null($namespace)) {
|
|
$key = $element_parts[1];
|
|
}
|
|
|
|
if (substr($key, 0, 11) == "@attributes") {
|
|
if (!isset($element) || !is_array($value)) {
|
|
continue;
|
|
}
|
|
|
|
foreach ($value as $attr_key => $attr_value) {
|
|
$element_parts = explode(":", $attr_key);
|
|
if ((count($element_parts) > 1) && isset($namespaces[$element_parts[0]])) {
|
|
$namespace = $namespaces[$element_parts[0]];
|
|
} else {
|
|
$namespace = null;
|
|
}
|
|
|
|
$element->addAttribute($attr_key, $attr_value, $namespace);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (!is_array($value)) {
|
|
$element = $xml->addChild($key, self::escape($value), $namespace);
|
|
} elseif (is_array($value)) {
|
|
$element = $xml->addChild($key, null, $namespace);
|
|
self::fromArray($value, $element, $remove_header, $namespaces, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Copies an XML object
|
|
*
|
|
* @param object $source The XML source
|
|
* @param object $target The XML target
|
|
* @param string $elementname Name of the XML element of the target
|
|
* @return void
|
|
*/
|
|
public static function copy(&$source, &$target, $elementname)
|
|
{
|
|
if (count($source->children()) == 0) {
|
|
$target->addChild($elementname, self::escape($source));
|
|
} else {
|
|
$child = $target->addChild($elementname);
|
|
foreach ($source->children() as $childfield => $childentry) {
|
|
self::copy($childentry, $child, $childfield);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create an XML element
|
|
*
|
|
* @param \DOMDocument $doc XML root
|
|
* @param string $element XML element name
|
|
* @param string $value XML value
|
|
* @param array $attributes array containing the attributes
|
|
*
|
|
* @return \DOMElement XML element object
|
|
*/
|
|
public static function createElement(\DOMDocument $doc, $element, $value = "", $attributes = [])
|
|
{
|
|
$element = $doc->createElement($element, self::escape($value));
|
|
|
|
foreach ($attributes as $key => $value) {
|
|
$attribute = $doc->createAttribute($key);
|
|
$attribute->value = self::escape($value);
|
|
$element->appendChild($attribute);
|
|
}
|
|
return $element;
|
|
}
|
|
|
|
/**
|
|
* Create an XML and append it to the parent object
|
|
*
|
|
* @param \DOMDocument $doc XML root
|
|
* @param object $parent parent object
|
|
* @param string $element XML element name
|
|
* @param string $value XML value
|
|
* @param array $attributes array containing the attributes
|
|
* @return void
|
|
*/
|
|
public static function addElement(\DOMDocument $doc, $parent, $element, $value = "", $attributes = [])
|
|
{
|
|
$element = self::createElement($doc, $element, $value, $attributes);
|
|
$parent->appendChild($element);
|
|
}
|
|
|
|
/**
|
|
* Convert an XML document to a normalised, case-corrected array
|
|
* used by webfinger
|
|
*
|
|
* @param object $xml_element The XML document
|
|
* @param integer $recursion_depth recursion counter for internal use - default 0
|
|
* internal use, recursion counter
|
|
*
|
|
* @return array | string The array from the xml element or the string
|
|
*/
|
|
public static function elementToArray($xml_element, &$recursion_depth = 0)
|
|
{
|
|
// If we're getting too deep, bail out
|
|
if ($recursion_depth > 512) {
|
|
return(null);
|
|
}
|
|
|
|
$xml_element_copy = '';
|
|
if (!is_string($xml_element)
|
|
&& !is_array($xml_element)
|
|
&& (get_class($xml_element) == 'SimpleXMLElement')
|
|
) {
|
|
$xml_element_copy = $xml_element;
|
|
$xml_element = get_object_vars($xml_element);
|
|
}
|
|
|
|
if (is_array($xml_element)) {
|
|
$result_array = [];
|
|
if (count($xml_element) <= 0) {
|
|
return (trim(strval($xml_element_copy)));
|
|
}
|
|
|
|
foreach ($xml_element as $key => $value) {
|
|
$recursion_depth++;
|
|
$result_array[strtolower($key)] = self::elementToArray($value, $recursion_depth);
|
|
$recursion_depth--;
|
|
}
|
|
|
|
if ($recursion_depth == 0) {
|
|
$temp_array = $result_array;
|
|
$result_array = [
|
|
strtolower($xml_element_copy->getName()) => $temp_array,
|
|
];
|
|
}
|
|
|
|
return ($result_array);
|
|
} else {
|
|
return (trim(strval($xml_element)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Convert the given XML text to an array in the XML structure.
|
|
*
|
|
* Xml::toArray() will convert the given XML text to an array in the XML structure.
|
|
* Link: http://www.bin-co.com/php/scripts/xml2array/
|
|
* Portions significantly re-written by mike@macgirvin.com for Friendica
|
|
* (namespaces, lowercase tags, get_attribute default changed, more...)
|
|
*
|
|
* Examples: $array = Xml::toArray(file_get_contents('feed.xml'));
|
|
* $array = Xml::toArray(file_get_contents('feed.xml', true, 1, 'attribute'));
|
|
*
|
|
* @param object $contents The XML text
|
|
* @param boolean $namespaces True or false include namespace information
|
|
* in the returned array as array elements.
|
|
* @param integer $get_attributes 1 or 0. If this is 1 the function will get the attributes as well as the tag values -
|
|
* this results in a different array structure in the return value.
|
|
* @param string $priority Can be 'tag' or 'attribute'. This will change the way the resulting
|
|
* array sturcture. For 'tag', the tags are given more importance.
|
|
*
|
|
* @return array The parsed XML in an array form. Use print_r() to see the resulting array structure.
|
|
* @throws \Exception
|
|
*/
|
|
public static function toArray($contents, $namespaces = true, $get_attributes = 1, $priority = 'attribute')
|
|
{
|
|
if (!$contents) {
|
|
return [];
|
|
}
|
|
|
|
if (!function_exists('xml_parser_create')) {
|
|
Logger::log('Xml::toArray: parser function missing');
|
|
return [];
|
|
}
|
|
|
|
|
|
libxml_use_internal_errors(true);
|
|
libxml_clear_errors();
|
|
|
|
if ($namespaces) {
|
|
$parser = @xml_parser_create_ns("UTF-8", ':');
|
|
} else {
|
|
$parser = @xml_parser_create();
|
|
}
|
|
|
|
if (! $parser) {
|
|
Logger::log('Xml::toArray: xml_parser_create: no resource');
|
|
return [];
|
|
}
|
|
|
|
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8");
|
|
// http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
|
|
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
|
|
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
|
|
@xml_parse_into_struct($parser, trim($contents), $xml_values);
|
|
@xml_parser_free($parser);
|
|
|
|
if (! $xml_values) {
|
|
Logger::log('Xml::toArray: libxml: parse error: ' . $contents, Logger::DATA);
|
|
foreach (libxml_get_errors() as $err) {
|
|
Logger::log('libxml: parse: ' . $err->code . " at " . $err->line . ":" . $err->column . " : " . $err->message, Logger::DATA);
|
|
}
|
|
libxml_clear_errors();
|
|
return;
|
|
}
|
|
|
|
//Initializations
|
|
$xml_array = [];
|
|
|
|
$current = &$xml_array; // Reference
|
|
|
|
// Go through the tags.
|
|
$repeated_tag_index = []; // Multiple tags with same name will be turned into an array
|
|
foreach ($xml_values as $data) {
|
|
$tag = $data['tag'];
|
|
$type = $data['type'];
|
|
$level = $data['level'];
|
|
$attributes = isset($data['attributes']) ? $data['attributes'] : null;
|
|
$value = isset($data['value']) ? $data['value'] : null;
|
|
|
|
$result = [];
|
|
$attributes_data = [];
|
|
|
|
if (isset($value)) {
|
|
if ($priority == 'tag') {
|
|
$result = $value;
|
|
} else {
|
|
$result['value'] = $value; // Put the value in a assoc array if we are in the 'Attribute' mode
|
|
}
|
|
}
|
|
|
|
//Set the attributes too.
|
|
if (isset($attributes) and $get_attributes) {
|
|
foreach ($attributes as $attr => $val) {
|
|
if ($priority == 'tag') {
|
|
$attributes_data[$attr] = $val;
|
|
} else {
|
|
$result['@attributes'][$attr] = $val; // Set all the attributes in a array called 'attr'
|
|
}
|
|
}
|
|
}
|
|
|
|
// See tag status and do the needed.
|
|
if ($namespaces && strpos($tag, ':')) {
|
|
$namespc = substr($tag, 0, strrpos($tag, ':'));
|
|
$tag = strtolower(substr($tag, strlen($namespc)+1));
|
|
$result['@namespace'] = $namespc;
|
|
}
|
|
$tag = strtolower($tag);
|
|
|
|
if ($type == "open") { // The starting of the tag '<tag>'
|
|
$parent[$level-1] = &$current;
|
|
if (!is_array($current) || (!in_array($tag, array_keys($current)))) { // Insert New tag
|
|
$current[$tag] = $result;
|
|
if ($attributes_data) {
|
|
$current[$tag. '_attr'] = $attributes_data;
|
|
}
|
|
$repeated_tag_index[$tag.'_'.$level] = 1;
|
|
|
|
$current = &$current[$tag];
|
|
} else { // There was another element with the same tag name
|
|
|
|
if (isset($current[$tag][0])) { // If there is a 0th element it is already an array
|
|
$current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
|
|
$repeated_tag_index[$tag.'_'.$level]++;
|
|
} else { // This section will make the value an array if multiple tags with the same name appear together
|
|
$current[$tag] = [$current[$tag], $result]; // This will combine the existing item and the new item together to make an array
|
|
$repeated_tag_index[$tag.'_'.$level] = 2;
|
|
|
|
if (isset($current[$tag.'_attr'])) { // The attribute of the last(0th) tag must be moved as well
|
|
$current[$tag]['0_attr'] = $current[$tag.'_attr'];
|
|
unset($current[$tag.'_attr']);
|
|
}
|
|
}
|
|
$last_item_index = $repeated_tag_index[$tag.'_'.$level]-1;
|
|
$current = &$current[$tag][$last_item_index];
|
|
}
|
|
} elseif ($type == "complete") { // Tags that ends in 1 line '<tag />'
|
|
//See if the key is already taken.
|
|
if (!isset($current[$tag])) { //New Key
|
|
$current[$tag] = $result;
|
|
$repeated_tag_index[$tag.'_'.$level] = 1;
|
|
if ($priority == 'tag' and $attributes_data) {
|
|
$current[$tag. '_attr'] = $attributes_data;
|
|
}
|
|
} else { // If taken, put all things inside a list(array)
|
|
if (isset($current[$tag][0]) and is_array($current[$tag])) { // If it is already an array...
|
|
|
|
// ...push the new element into that array.
|
|
$current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
|
|
|
|
if ($priority == 'tag' and $get_attributes and $attributes_data) {
|
|
$current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
|
|
}
|
|
$repeated_tag_index[$tag.'_'.$level]++;
|
|
} else { // If it is not an array...
|
|
$current[$tag] = [$current[$tag], $result]; //...Make it an array using using the existing value and the new value
|
|
$repeated_tag_index[$tag.'_'.$level] = 1;
|
|
if ($priority == 'tag' and $get_attributes) {
|
|
if (isset($current[$tag.'_attr'])) { // The attribute of the last(0th) tag must be moved as well
|
|
|
|
$current[$tag]['0_attr'] = $current[$tag.'_attr'];
|
|
unset($current[$tag.'_attr']);
|
|
}
|
|
|
|
if ($attributes_data) {
|
|
$current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
|
|
}
|
|
}
|
|
$repeated_tag_index[$tag.'_'.$level]++; // 0 and 1 indexes are already taken
|
|
}
|
|
}
|
|
} elseif ($type == 'close') { // End of tag '</tag>'
|
|
$current = &$parent[$level-1];
|
|
}
|
|
}
|
|
|
|
return($xml_array);
|
|
}
|
|
|
|
/**
|
|
* Delete a node in a XML object
|
|
*
|
|
* @param \DOMDocument $doc XML document
|
|
* @param string $node Node name
|
|
* @return void
|
|
*/
|
|
public static function deleteNode(\DOMDocument $doc, $node)
|
|
{
|
|
$xpath = new DOMXPath($doc);
|
|
$list = $xpath->query("//".$node);
|
|
foreach ($list as $child) {
|
|
$child->parentNode->removeChild($child);
|
|
}
|
|
}
|
|
|
|
public static function parseString($s, $strict = true)
|
|
{
|
|
// the "strict" parameter is deactivated
|
|
libxml_use_internal_errors(true);
|
|
|
|
$x = @simplexml_load_string($s);
|
|
if (!$x) {
|
|
Logger::error('Error(s) while parsing XML string.', ['callstack' => System::callstack()]);
|
|
foreach (libxml_get_errors() as $err) {
|
|
Logger::info('libxml error', ['code' => $err->code, 'position' => $err->line . ":" . $err->column, 'message' => $err->message]);
|
|
}
|
|
Logger::debug('Erroring XML string', ['xml' => $s]);
|
|
libxml_clear_errors();
|
|
}
|
|
return $x;
|
|
}
|
|
|
|
public static function getFirstNodeValue(DOMXPath $xpath, $element, $context = null)
|
|
{
|
|
$result = $xpath->evaluate($element, $context);
|
|
if (!is_object($result)) {
|
|
return '';
|
|
}
|
|
|
|
$first_item = $result->item(0);
|
|
if (!is_object($first_item)) {
|
|
return '';
|
|
}
|
|
|
|
return $first_item->nodeValue;
|
|
}
|
|
|
|
public static function getFirstAttributes(DOMXPath $xpath, $element, $context = null)
|
|
{
|
|
$result = $xpath->query($element, $context);
|
|
if (!is_object($result)) {
|
|
return false;
|
|
}
|
|
|
|
$first_item = $result->item(0);
|
|
if (!is_object($first_item)) {
|
|
return false;
|
|
}
|
|
|
|
return $first_item->attributes;
|
|
}
|
|
|
|
/**
|
|
* escape text ($str) for XML transport
|
|
*
|
|
* @param string $str
|
|
* @return string Escaped text.
|
|
*/
|
|
public static function escape($str)
|
|
{
|
|
$buffer = htmlspecialchars($str, ENT_QUOTES, 'UTF-8');
|
|
$buffer = trim($buffer);
|
|
|
|
return $buffer;
|
|
}
|
|
|
|
/**
|
|
* undo an escape
|
|
*
|
|
* @param string $s xml escaped text
|
|
* @return string unescaped text
|
|
*/
|
|
public static function unescape($s)
|
|
{
|
|
$ret = htmlspecialchars_decode($s, ENT_QUOTES);
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* apply escape() to all values of array $val, recursively
|
|
*
|
|
* @param array $val
|
|
* @return array|string
|
|
*/
|
|
public static function arrayEscape($val)
|
|
{
|
|
if (is_bool($val)) {
|
|
return $val ? 'true' : 'false';
|
|
} elseif (is_array($val)) {
|
|
return array_map('XML::arrayEscape', $val);
|
|
}
|
|
|
|
return self::escape((string) $val);
|
|
}
|
|
}
|