gl-store-s3.js/node_modules/aws-sdk/lib/xml/browser_parser.js

199 lines
5.5 KiB
JavaScript

var util = require('../util');
var Shape = require('../model/shape');
function DomXmlParser() { }
DomXmlParser.prototype.parse = function(xml, shape) {
if (xml.replace(/^\s+/, '') === '') return {};
var result, error;
try {
if (window.DOMParser) {
try {
var parser = new DOMParser();
result = parser.parseFromString(xml, 'text/xml');
} catch (syntaxError) {
throw util.error(new Error('Parse error in document'),
{
originalError: syntaxError,
code: 'XMLParserError',
retryable: true
});
}
if (result.documentElement === null) {
throw util.error(new Error('Cannot parse empty document.'),
{
code: 'XMLParserError',
retryable: true
});
}
var isError = result.getElementsByTagName('parsererror')[0];
if (isError && (isError.parentNode === result ||
isError.parentNode.nodeName === 'body' ||
isError.parentNode.parentNode === result ||
isError.parentNode.parentNode.nodeName === 'body')) {
var errorElement = isError.getElementsByTagName('div')[0] || isError;
throw util.error(new Error(errorElement.textContent || 'Parser error in document'),
{
code: 'XMLParserError',
retryable: true
});
}
} else if (window.ActiveXObject) {
result = new window.ActiveXObject('Microsoft.XMLDOM');
result.async = false;
if (!result.loadXML(xml)) {
throw util.error(new Error('Parse error in document'),
{
code: 'XMLParserError',
retryable: true
});
}
} else {
throw new Error('Cannot load XML parser');
}
} catch (e) {
error = e;
}
if (result && result.documentElement && !error) {
var data = parseXml(result.documentElement, shape);
var metadata = getElementByTagName(result.documentElement, 'ResponseMetadata');
if (metadata) {
data.ResponseMetadata = parseXml(metadata, {});
}
return data;
} else if (error) {
throw util.error(error || new Error(), {code: 'XMLParserError', retryable: true});
} else { // empty xml document
return {};
}
};
function getElementByTagName(xml, tag) {
var elements = xml.getElementsByTagName(tag);
for (var i = 0, iLen = elements.length; i < iLen; i++) {
if (elements[i].parentNode === xml) {
return elements[i];
}
}
}
function parseXml(xml, shape) {
if (!shape) shape = {};
switch (shape.type) {
case 'structure': return parseStructure(xml, shape);
case 'map': return parseMap(xml, shape);
case 'list': return parseList(xml, shape);
case undefined: case null: return parseUnknown(xml);
default: return parseScalar(xml, shape);
}
}
function parseStructure(xml, shape) {
var data = {};
if (xml === null) return data;
util.each(shape.members, function(memberName, memberShape) {
if (memberShape.isXmlAttribute) {
if (Object.prototype.hasOwnProperty.call(xml.attributes, memberShape.name)) {
var value = xml.attributes[memberShape.name].value;
data[memberName] = parseXml({textContent: value}, memberShape);
}
} else {
var xmlChild = memberShape.flattened ? xml :
getElementByTagName(xml, memberShape.name);
if (xmlChild) {
data[memberName] = parseXml(xmlChild, memberShape);
} else if (!memberShape.flattened && memberShape.type === 'list') {
data[memberName] = memberShape.defaultValue;
}
}
});
return data;
}
function parseMap(xml, shape) {
var data = {};
var xmlKey = shape.key.name || 'key';
var xmlValue = shape.value.name || 'value';
var tagName = shape.flattened ? shape.name : 'entry';
var child = xml.firstElementChild;
while (child) {
if (child.nodeName === tagName) {
var key = getElementByTagName(child, xmlKey).textContent;
var value = getElementByTagName(child, xmlValue);
data[key] = parseXml(value, shape.value);
}
child = child.nextElementSibling;
}
return data;
}
function parseList(xml, shape) {
var data = [];
var tagName = shape.flattened ? shape.name : (shape.member.name || 'member');
var child = xml.firstElementChild;
while (child) {
if (child.nodeName === tagName) {
data.push(parseXml(child, shape.member));
}
child = child.nextElementSibling;
}
return data;
}
function parseScalar(xml, shape) {
if (xml.getAttribute) {
var encoding = xml.getAttribute('encoding');
if (encoding === 'base64') {
shape = new Shape.create({type: encoding});
}
}
var text = xml.textContent;
if (text === '') text = null;
if (typeof shape.toType === 'function') {
return shape.toType(text);
} else {
return text;
}
}
function parseUnknown(xml) {
if (xml === undefined || xml === null) return '';
// empty object
if (!xml.firstElementChild) {
if (xml.parentNode.parentNode === null) return {};
if (xml.childNodes.length === 0) return '';
else return xml.textContent;
}
// object, parse as structure
var shape = {type: 'structure', members: {}};
var child = xml.firstElementChild;
while (child) {
var tag = child.nodeName;
if (Object.prototype.hasOwnProperty.call(shape.members, tag)) {
// multiple tags of the same name makes it a list
shape.members[tag].type = 'list';
} else {
shape.members[tag] = {name: tag};
}
child = child.nextElementSibling;
}
return parseStructure(xml, shape);
}
/**
* @api private
*/
module.exports = DomXmlParser;