Tenía el mismo problema. Aparentemente, el análisis XML no es posible en los webworkers. Usé sax.js para analizar un XML en un trabajador web. https://github.com/isaacs/sax-js
esto es básicamente mi analizador.
function xmlParser(strict){
this.parser = sax.parser(strict, {lowercase:true});
}
xmlParser.prototype.parseFile = function(file, callback){
var _this = this;
$.ajax.get({
cache: false,
url: file,
dataType: "xml",
success: function(data){
var dom = _this.parseText(data.text);
callback(dom);
},
error: function(data){
}
});
}
xmlParser.prototype.parseText = function(xlmText){
var dom = undefined;
var activeNode = dom;
this.parser.onerror = function (e) { };
this.parser.onend = function() {};
this.parser.ontext = function (t) {
if(activeNode != undefined)
activeNode.Text = t;
};
this.parser.onopentag = function (node) {
var node = new xmlNode(node.name, activeNode, node.attributes, dom);
if(dom === undefined){
dom = node;
activeNode = node;
}else{
activeNode.Children.push(node);
activeNode = node;
}
};
this.parser.onclosetag = function (node) {
activeNode = activeNode.Parent;
};
this.parser.write(xlmText).close();
return dom;
}
xmlNode permite un manejo del árbol similar a jquery.
function xmlFilterResult(){
this.length = 0;
}
xmlFilterResult.prototype.push = function(element){
this[this.length++] = element;
}
xmlFilterResult.prototype.attr = function(atribute){
if(this.length == 0)
return '';
return this[0].Attributes[atribute];
}
xmlFilterResult.prototype.text = function(atribute){
if(this.length == 0)
return '';
return this[0].Text;
}
xmlFilterResult.prototype.children = function(search, result){
if(result == undefined)
result = new xmlFilterResult();
if(search == undefined){
for(var i = 0; i < this.length; i++){
this[i].children(search, result);
}
}else{
this.find(search, true, result);
}
return result;
}
xmlFilterResult.prototype.find = function(search, nonrecursive, result){
if(result == undefined)
result = new xmlFilterResult();
if(search.charAt(0) == '.')
return this.findAttr('class', search.substring(1), nonrecursive, result);
else if(search.charAt(0) == '#')
return this.findAttr('id', search.substring(1), nonrecursive, result);
else
return this.findName(search, nonrecursive, result);
}
xmlFilterResult.prototype.findAttr = function(attr, value, nonrecursive, result){
if(result == undefined)
result = new xmlFilterResult();
var child;
for(var i = 0; i < this.length; i++){
child = this[i];
child.findAttr(attr, value, nonrecursive, result);
}
return result
}
xmlFilterResult.prototype.findName = function(name, nonrecursive, result){
if(result == undefined)
result = new xmlFilterResult();
var child;
for(var i = 0; i < this.length; i++){
child = this[i];
child.findName(name, nonrecursive, result);
}
return result
}
// xmlFilterResult.prototype.findID = function(id, nonrecursive){
// var child, result = new xmlFilterResult();
// for(var i = 0; i < this.length; i++){
// child = this[i];
// child.findID(id, nonrecursive, result);
// }
// return result
// }
function xmlNode(name, parent, atributes, root){
this.Name = name;
this.Children = [];
this.Parent = parent;
this.Attributes = atributes;
this.Document = root;
this.Text = '';
}
xmlNode.prototype.attr = function(atribute){
return this.Attributes[atribute];
}
xmlNode.prototype.text = function(atribute){
return this.Text;
}
xmlNode.prototype.children = function(search, result){
if(result == undefined)
result = new xmlFilterResult();
if(search == undefined){
for(i in this.Children)
result.push(this.Children[i]);
}else{
return this.find(search, true, result);
}
return result;
}
xmlNode.prototype.find = function(search, nonrecursive, result){
if(search.charAt(0) == '.')
return this.findAttr('class', search.substring(1), nonrecursive, result);
else if(search.charAt(0) == '#')
return this.findAttr('id', search.substring(1), nonrecursive, result);
else
return this.findName(search, nonrecursive, result);
}
xmlNode.prototype.findAttr = function(attr, value, nonrecursive, result){
var child, i;
if(result == undefined)
result = new xmlFilterResult();
for(i in this.Children){
child = this.Children[i];
if(child.Attributes[attr] == value)
result.push(child);
if(!nonrecursive)
child.findAttr(attr, value, nonrecursive, result);
}
return result
}
xmlNode.prototype.findName = function(name, nonrecursive, result){
var child, i;
if(result == undefined)
result = new xmlFilterResult();
for(i in this.Children){
child = this.Children[i];
if(child.Name == name){
result.push(child);
}
if(!nonrecursive)
child.findName(name, nonrecursive, result);
}
return result
}
No es nada especial, pero se le ocurre la idea de hacerlo.
Todavía no funciona después de que agregué requestheader e intenté anular el tipo de mime, responseXML sigue siendo nulo. Parece ser un problema con el webworker ya que los scripts funcionan bien en el documento principal. – axlOnline
Tengo el mismo problema; tipo mime configurado en text/xml en script de respuesta, el estado listo xmlhttprequest es 4 y responseType está en blanco y responseXML es nulo. Frustrante. Una solución que he estado usando es traducir XML a JSON en PHP, y devolver eso, y usar JSON.parse, que afortunadamente sí funciona. –