utils.js
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var select = require('xpath.js');
function findAttr(node, localName, namespace) {
for (var i = 0; i<node.attributes.length; i++) {
var attr = node.attributes[i]
if (attrEqualsExplicitly(attr, localName, namespace) || attrEqualsImplicitly(attr, localName, namespace, node)) {
return attr
}
}
return null
}
function findFirst(doc, xpath) {
var nodes = select(doc, xpath)
if (nodes.length==0) throw "could not find xpath " + xpath
return nodes[0]
}
function findChilds(node, localName, namespace) {
node = node.documentElement || node;
var res = []
for (var i = 0; i<node.childNodes.length; i++) {
var child = node.childNodes[i]
if (child.localName==localName && (child.namespaceURI==namespace || !namespace)) {
res.push(child)
}
}
return res
}
function attrEqualsExplicitly(attr, localName, namespace) {
return attr.localName==localName && (attr.namespaceURI==namespace || !namespace)
}
function attrEqualsImplicitly(attr, localName, namespace, node) {
return attr.localName==localName && ((!attr.namespaceURI && node.namespaceURI==namespace) || !namespace)
}
var xml_special_to_encoded_attribute = {
'&': '&',
'<': '<',
'"': '"',
'\r': '
',
'\n': '
',
'\t': '	'
}
var xml_special_to_encoded_text = {
'&': '&',
'<': '<',
'>': '>',
'\r': '
'
}
function encodeSpecialCharactersInAttribute(attributeValue){
return attributeValue
.replace(/[\r\n\t ]+/g, ' ') // White space normalization (Note: this should normally be done by the xml parser) See: https://www.w3.org/TR/xml/#AVNormalize
.replace(/([&<"\r\n\t])/g, function(str, item){
// Special character normalization. See:
// - https://www.w3.org/TR/xml-c14n#ProcessingModel (Attribute Nodes)
// - https://www.w3.org/TR/xml-c14n#Example-Chars
return xml_special_to_encoded_attribute[item]
})
}
function encodeSpecialCharactersInText(text){
return text
.replace(/\r\n?/g, '\n') // Line ending normalization (Note: this should normally be done by the xml parser). See: https://www.w3.org/TR/xml/#sec-line-ends
.replace(/([&<>\r])/g, function(str, item){
// Special character normalization. See:
// - https://www.w3.org/TR/xml-c14n#ProcessingModel (Text Nodes)
// - https://www.w3.org/TR/xml-c14n#Example-Chars
return xml_special_to_encoded_text[item]
})
}
exports.findAttr = findAttr
exports.findChilds = findChilds
exports.encodeSpecialCharactersInAttribute = encodeSpecialCharactersInAttribute
exports.encodeSpecialCharactersInText = encodeSpecialCharactersInText
exports.findFirst = findFirst