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/**
* Module dependencies.
*/
const { DOMParser } = require('@xmldom/xmldom');
/**
* Module exports.
*/
exports.parse = parse;
var TEXT_NODE = 3;
var CDATA_NODE = 4;
var COMMENT_NODE = 8;
/**
* We ignore raw text (usually whitespace), <!-- xml comments -->,
* and raw CDATA nodes.
*
* @param {Element} node
* @returns {Boolean}
* @api private
*/
function shouldIgnoreNode (node) {
return node.nodeType === TEXT_NODE
|| node.nodeType === COMMENT_NODE
|| node.nodeType === CDATA_NODE;
}
/**
* Check if the node is empty. Some plist file has such node:
* <key />
* this node shoud be ignored.
*
* @see https://github.com/TooTallNate/plist.js/issues/66
* @param {Element} node
* @returns {Boolean}
* @api private
*/
function isEmptyNode(node){
if(!node.childNodes || node.childNodes.length === 0) {
return true;
} else {
return false;
}
}
function invariant(test, message) {
if (!test) {
throw new Error(message);
}
}
/**
* Parses a Plist XML string. Returns an Object.
*
* @param {String} xml - the XML String to decode
* @returns {Mixed} the decoded value from the Plist XML
* @api public
*/
function parse (xml) {
var doc = new DOMParser().parseFromString(xml);
invariant(
doc.documentElement.nodeName === 'plist',
'malformed document. First element should be <plist>'
);
var plist = parsePlistXML(doc.documentElement);
// the root <plist> node gets interpreted as an Array,
// so pull out the inner data first
if (plist.length == 1) plist = plist[0];
return plist;
}
/**
* Convert an XML based plist document into a JSON representation.
*
* @param {Object} xml_node - current XML node in the plist
* @returns {Mixed} built up JSON object
* @api private
*/
function parsePlistXML (node) {
var i, new_obj, key, val, new_arr, res, counter, type;
if (!node)
return null;
if (node.nodeName === 'plist') {
new_arr = [];
if (isEmptyNode(node)) {
return new_arr;
}
for (i=0; i < node.childNodes.length; i++) {
if (!shouldIgnoreNode(node.childNodes[i])) {
new_arr.push( parsePlistXML(node.childNodes[i]));
}
}
return new_arr;
} else if (node.nodeName === 'dict') {
new_obj = {};
key = null;
counter = 0;
if (isEmptyNode(node)) {
return new_obj;
}
for (i=0; i < node.childNodes.length; i++) {
if (shouldIgnoreNode(node.childNodes[i])) continue;
if (counter % 2 === 0) {
invariant(
node.childNodes[i].nodeName === 'key',
'Missing key while parsing <dict/>.'
);
key = parsePlistXML(node.childNodes[i]);
} else {
invariant(
node.childNodes[i].nodeName !== 'key',
'Unexpected key "'
+ parsePlistXML(node.childNodes[i])
+ '" while parsing <dict/>.'
);
new_obj[key] = parsePlistXML(node.childNodes[i]);
}
counter += 1;
}
if (counter % 2 === 1) {
new_obj[key] = '';
}
return new_obj;
} else if (node.nodeName === 'array') {
new_arr = [];
if (isEmptyNode(node)) {
return new_arr;
}
for (i=0; i < node.childNodes.length; i++) {
if (!shouldIgnoreNode(node.childNodes[i])) {
res = parsePlistXML(node.childNodes[i]);
if (null != res) new_arr.push(res);
}
}
return new_arr;
} else if (node.nodeName === '#text') {
// TODO: what should we do with text types? (CDATA sections)
} else if (node.nodeName === 'key') {
if (isEmptyNode(node)) {
return '';
}
invariant(
node.childNodes[0].nodeValue !== '__proto__',
'__proto__ keys can lead to prototype pollution. More details on CVE-2022-22912'
);
return node.childNodes[0].nodeValue;
} else if (node.nodeName === 'string') {
res = '';
if (isEmptyNode(node)) {
return res;
}
for (i=0; i < node.childNodes.length; i++) {
var type = node.childNodes[i].nodeType;
if (type === TEXT_NODE || type === CDATA_NODE) {
res += node.childNodes[i].nodeValue;
}
}
return res;
} else if (node.nodeName === 'integer') {
invariant(
!isEmptyNode(node),
'Cannot parse "" as integer.'
);
return parseInt(node.childNodes[0].nodeValue, 10);
} else if (node.nodeName === 'real') {
invariant(
!isEmptyNode(node),
'Cannot parse "" as real.'
);
res = '';
for (i=0; i < node.childNodes.length; i++) {
if (node.childNodes[i].nodeType === TEXT_NODE) {
res += node.childNodes[i].nodeValue;
}
}
return parseFloat(res);
} else if (node.nodeName === 'data') {
res = '';
if (isEmptyNode(node)) {
return Buffer.from(res, 'base64');
}
for (i=0; i < node.childNodes.length; i++) {
if (node.childNodes[i].nodeType === TEXT_NODE) {
res += node.childNodes[i].nodeValue.replace(/\s+/g, '');
}
}
return Buffer.from(res, 'base64');
} else if (node.nodeName === 'date') {
invariant(
!isEmptyNode(node),
'Cannot parse "" as Date.'
)
return new Date(node.childNodes[0].nodeValue);
} else if (node.nodeName === 'null') {
return null;
} else if (node.nodeName === 'true') {
return true;
} else if (node.nodeName === 'false') {
return false;
} else {
throw new Error('Invalid PLIST tag ' + node.nodeName);
}
}
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