学步园

function createXMLDOM(){
var arrSignatures=["MSXML2.DOMDocument.5.0","MSXML2.DOMDocument.4.0","MSXML2.DOMDocument.3.0","MSXML2.DOMDocument","Microsoft.XmlDom"];
for(var i=0;i<arrSignatures.length;i++){
try{
var oXmlDom=new ActiveXObject(arrSignatures[i]);
return oXmlDom;
} catch(oError){
}
}
throw new Error("MSXML is not installed on your system");
}
var oXmlDom=createXMLDOM();
//方式一：加载字符串
oXmlDom.loadXML("<root><child/></rot>");
//处理错误
if(oXmlDom.parseError != 0){
var oError=oXmlDom.parseError;
alert("An Error occurred:\nError Code:" + oError.errorCode
+ "\nLine:" + oError.line + "\nLine Pos:" + oError.linepos
+ "\nReason:" + oError.reason);
} else {
var childNodes=oXmlDom.documentElement.childNodes;
console.log(childNodes.length+" "+childNodes[0].xml);// 1 <child/>
}
//方式二：加载XML文件
oXmlDom.onreadystatechange = function(){
//文档加载完毕
if(oXmlDom.readyState == 4){
if(oXmlDom.parseError != 0){
var oError=oXmlDom.parseError;
alert("An Error occurred:\nError Code:" + oError.errorCode
+ "\nLine:" + oError.line + "\nLine Pos:" + oError.linepos
+ "\nReason:" + oError.reason);
} else {
var childNodes=oXmlDom.documentElement.childNodes;
console.log(childNodes.length+" "+childNodes[0].xml);// 1 <child/>
}
}
}
oXmlDom.load("test.xml");

var oParser = new DOMParser();
var oXmlDom = oParser.parseFromString("<root/>","text/xml");

var oSerializer = new XMLSerializer();
var sXml = oSerializer.serializeToString(oXmlDom,"text/xml");　　在后面的例子中我们可以看到如何用defineGetter()方法来定义一个xml特性。

var reError = />([\s\S]*?)Location:([\s\S]*?)Line Number (\d+),Column (\d+):<sourcetext>([\s\S]*?)(?:\-*\^)/;
if(oXmlDom.documentElement.tagName == "parsererror"){
reError.test(oXmlDom.xml);
alert("An error occurred:\nDescription: " + RegExp.$1 +"\n"
+ "File: " + RegExp.$2 + "\n"
+ "Line: " + RegExp.$3 + "\n"
+ "Line Pos: " + RegExp.$4 + "\n"
+ "Source: " + RegExp.$5);
}

var oXmlDom=document.implementation.createDocument("","<root>",null);
oXmlDom.async = false;
oXmlDom.onload = function(){
alert('Done');
}
var reError = />([\s\S]*?)Location:([\s\S]*?)Line Number (\d+),Column (\d+):<sourcetext>([\s\S]*?)(?:\-*\^)/;
if(oXmlDom.documentElement.tagName == "parsererror"){
reError.test(oXmlDom.xml);
alert("An error occurred:\nDescription: " + RegExp.$1 +"\n"
+ "File: " + RegExp.$2 + "\n"
+ "Line: " + RegExp.$3 + "\n"
+ "Line Pos: " + RegExp.$4 + "\n"
+ "Source: " + RegExp.$5);
}
Node.prototype.__defineGetter__("xml", function () {
var oSerializer = new XMLSerializer();
return oSerializer.serializeToString(this, "text/xml");
});
oXmlDom.load('test.xml');
alert(oXmldom.xml);
var oNode = oXmlDom.documentElement.childNodes[1];
alert(oNode.xml);

function XmlDom() {
if (window.ActiveXObject) {//IE
var arrSignatures = ["MSXML2.DOMDocument.5.0", "MSXML2.DOMDocument.4.0",
"MSXML2.DOMDocument.3.0", "MSXML2.DOMDocument", "Microsoft.XmlDom"];
for (var i = 0; i < arrSignatures.length; i++) {
try {
var oXmlDom = new ActiveXObject(arrSignatures[i]);
return oXmlDom;
}
catch (oError) {
//ignore
}
}
throw new Error("MSXML is not installed on your system.");
} else if (document.implementation && document.implementation.createDocument) {
var oXmlDom = document.implementation.createDocument("", "", null);
oXmlDom.parseError = {valueOf:function () {
return this.errorCode;
}, toString:function () {
return this.errorCode.toString();
}};
oXmlDom.__initError__();
oXmlDom.addEventListener("load", function () {
this.__checkForErrors__();
this.__changeReadyState__(4);
}, false);
return oXmlDom;
} else {
throw new Error("Your browser doesn't support an XML DOM object.");
}
}
if (isMoz) {
Document.prototype._readyState_ = 0;
Document.prototype.onreadystatechange = null;
Document.prototype.__changeReadyState__ = function (iReadyState) {
this._readyState_ = iReadyState;
if (typeof this.onreadystatechange == "function") {
this.onreadystatechange();
}
};
Document.prototype.__initError__ = function () {
this.parseError.errorCode = 0;
this.parseError.filepos = -1;
this.parseError.line = -1;
this.parseError.linepos = -1;
this.parseError.reason = null;
this.parseError.srcText = null;
this.parseError.url = null;
};
Document.prototype.__checkForErrors__ = function () {
if (this.documentElement.tagName == "parsererror") {
var reError = />([\s\S]*?)Location:([\s\S]*?)Line Number (\d+),Column (\d+):<sourcetext>([\s\S]*?)(?:\-*\^)/;
reError.test(this.xml);
this.parseError.errorCode = -999999;
this.parseError.reason = RegExp.$1;
this.parseError.url = RegExp.$2;
this.parseError.line = parseInt(RegExp.$3);
this.parseError.linepos = parseInt(RegExp.$4);
this.parseError.srcText = RegExp.$5;
}
};
Document.prototype.loadXML = function (sXml) {
this.__initError__();
this.__changeReadyState__(1);
var oParser = new DOMParser();
var oXmlDom = oParser.parseFromString(sXml, "text/xml");
while (this.firstChild) {
this.removeChild(this.firstChild);
}
for (var i = 0; i < oXmlDom.childNodes.length; i++) {
var oNewNode = this.importNode(oXmlDom.childNodes[i], true);
this.appendChild(oNewNode);
}
this.__checkForErrors__();
this.__changeReadyState__(4);
};
Document.prototype.__load__ = Document.prototype.load;
Document.prototype.load = function (sURL) {
this.__initError__();
this.__changeReadyState__(1);
this.__load__(sURL);
};
Document.prototype.getReadyState = function () {
return this._readyState_;
};
Node.prototype.__defineGetter__("xml", function () {
var oSerializer = new XMLSerializer();
return oSerializer.serializeToString(this, "text/xml");
});
}