xml2json.js

/*
* 
* http://www.thomasfrank.se/xml_to_json.html
* 
* xml2json v 1.1
* copyright 2005-2007 Thomas Frank
* 
* // 简单调用 - myXML是XML格式的字符串:
* myJsonObject=xml2json.parser(myXML);
* 
* // 第二个参数可选， 代表 "不进行转换的tags" ，本例中为<b>和<i>:
* myJsonObject=xml2json.parser(myXML,'b,i');
*  
* // 第三个参数可选，表明希望返回一个 JSON structure 的字符串，而不是JSON object:
* myString=xml2json.parser(myXML,'','html');
* // - 使用 "compact" 可以在输出时去掉换行或tabbing
* // - 使用 "normal"  则包含换行或tabbing
* // - 使用 "html"    以html格式
* 
* 例如：
* 
* str="<animals>
*      <dog>
*           <name>Rufus</name>
*           <breed>labrador</breed>
*      </dog>
*      <dog>
*           <name>Marty</name>
*           <breed>whippet</breed>
*      </dog>
*      <cat name="Matilda"/>
* </animals>"
* 
* myJsonObject=xml2json.parser(str);
* alert(myJsonObject.animals.dog[0].name)
* 
*  xml2json for Node.js
*  Author    : Kenshin
*  Emil      : kenshin@ksria.com
*  version   : 1.0
*  Date      : 2012-05-06
*  Blog      : http://www.k-zone.cn/zblog
*  Project   : https://github.com/kenshin/node-xml2json
*  Dual licensed under the MIT or GPL Version 2 licenses
*  
*  copyright 2012
* 
*/

exports.parser = function(xmlcode,ignoretags,debug){
		if(!ignoretags){ignoretags=""};
		xmlcode=xmlcode.replace(/\s*\/>/g,'/>');
		xmlcode=xmlcode.replace(/<\?[^>]*>/g,"").replace(/<\![^>]*>/g,"");
		if (!ignoretags.sort){ignoretags=ignoretags.split(",")};
		var x=this.no_fast_endings(xmlcode);
		x=this.attris_to_tags(x);
		x=escape(x);
		x=x.split("%3C").join("<").split("%3E").join(">").split("%3D").join("=").split("%22").join("\"");
		for (var i=0;i<ignoretags.length;i++){
			x=x.replace(new RegExp("<"+ignoretags[i]+">","g"),"*$**"+ignoretags[i]+"**$*");
			x=x.replace(new RegExp("</"+ignoretags[i]+">","g"),"*$***"+ignoretags[i]+"**$*")
		};
		x='<JSONTAGWRAPPER>'+x+'</JSONTAGWRAPPER>';
		this.xmlobject={};
		var y=this.xml_to_object(x).jsontagwrapper;
		if(debug){y=this.show_json_structure(y,debug)};
		return y
}

exports.xml_to_object = function(xmlcode){
		var x=xmlcode.replace(/<\//g,"�");
		x=x.split("<");
		var y=[];
		var level=0;
		var opentags=[];
		for (var i=1;i<x.length;i++){
			var tagname=x[i].split(">")[0];
			opentags.push(tagname);
			level++
			y.push(level+"<"+x[i].split("�")[0]);
			while(x[i].indexOf("�"+opentags[opentags.length-1]+">")>=0){level--;opentags.pop()}
		};
		var oldniva=-1;
		var objname="this.xmlobject";
		for (var i=0;i<y.length;i++){
			var preeval="";
			var niva=y[i].split("<")[0];
			var tagnamn=y[i].split("<")[1].split(">")[0];
			tagnamn=tagnamn.toLowerCase();
			var rest=y[i].split(">")[1];
			if(niva<=oldniva){
				var tabort=oldniva-niva+1;
				for (var j=0;j<tabort;j++){objname=objname.substring(0,objname.lastIndexOf("."))}
			};
			objname+="."+tagnamn;
			var pobject=objname.substring(0,objname.lastIndexOf("."));
			if (eval("typeof "+pobject) != "object"){preeval+=pobject+"={value:"+pobject+"};\n"};
			var objlast=objname.substring(objname.lastIndexOf(".")+1);
			var already=false;
			for (var k in eval(pobject)){if(k==objlast){already=true}};
			var onlywhites=true;
			for(var s=0;s<rest.length;s+=3){
				if(rest.charAt(s)!="%"){onlywhites=false}
			};
			if (rest!="" && !onlywhites){
				if(rest/1!=rest){
					rest="'"+rest.replace(/\'/g,"\\'")+"'";
					rest=rest.replace(/\*\$\*\*\*/g,"</");
					rest=rest.replace(/\*\$\*\*/g,"<");
					rest=rest.replace(/\*\*\$\*/g,">")
				}
			} 
			else {rest="{}"};
			if(rest.charAt(0)=="'"){rest='unescape('+rest+')'};
			if (already && !eval(objname+".sort")){preeval+=objname+"=["+objname+"];\n"};
			var before="=";var after="";
			if (already){before=".push(";after=")"};
			var toeval=preeval+objname+before+rest+after;
			eval(toeval);
			if(eval(objname+".sort")){objname+="["+eval(objname+".length-1")+"]"};
			oldniva=niva
		};
		return this.xmlobject
}

exports.show_json_structure = function(obj,debug,l){
		var x='';
		if (obj.sort){x+="[\n"} else {x+="{\n"};
		for (var i in obj){
			if (!obj.sort){x+=i+":"};
			if (typeof obj[i] == "object"){
				x+=this.show_json_structure(obj[i],false,1)
			}
			else {
				if(typeof obj[i]=="function"){
					var v=obj[i]+"";
					//v=v.replace(/\t/g,"");
					x+=v
				}
				else if(typeof obj[i]!="string"){x+=obj[i]+",\n"}
				else {x+="'"+obj[i].replace(/\'/g,"\\'").replace(/\n/g,"\\n").replace(/\t/g,"\\t").replace(/\r/g,"\\r")+"',\n"}
			}
		};
		if (obj.sort){x+="],\n"} else {x+="},\n"};
		if (!l){
			x=x.substring(0,x.lastIndexOf(","));
			x=x.replace(new RegExp(",\n}","g"),"\n}");
			x=x.replace(new RegExp(",\n]","g"),"\n]");
			var y=x.split("\n");x="";
			var lvl=0;
			for (var i=0;i<y.length;i++){
				if(y[i].indexOf("}")>=0 || y[i].indexOf("]")>=0){lvl--};
				tabs="";for(var j=0;j<lvl;j++){tabs+="\t"};
				x+=tabs+y[i]+"\n";
				if(y[i].indexOf("{")>=0 || y[i].indexOf("[")>=0){lvl++}
			};
			if(debug=="html"){
				x=x.replace(/</g,"&lt;").replace(/>/g,"&gt;");
				x=x.replace(/\n/g,"<BR>").replace(/\t/g,"&nbsp;&nbsp;&nbsp;&nbsp;")
			};
			if (debug=="compact"){x=x.replace(/\n/g,"").replace(/\t/g,"")}
		};
		return x
}

exports.no_fast_endings = function(x){
		x=x.split("/>");
		for (var i=1;i<x.length;i++){
			var t=x[i-1].substring(x[i-1].lastIndexOf("<")+1).split(" ")[0];
			x[i]="></"+t+">"+x[i]
		}	;
		x=x.join("");
		return x
}

exports.attris_to_tags = function(x){
		var d=' ="\''.split("");
		x=x.split(">");
		for (var i=0;i<x.length;i++){
			var temp=x[i].split("<");
			for (var r=0;r<4;r++){temp[0]=temp[0].replace(new RegExp(d[r],"g"),"_jsonconvtemp"+r+"_")};
			if(temp[1]){
				temp[1]=temp[1].replace(/'/g,'"');
				temp[1]=temp[1].split('"');
				for (var j=1;j<temp[1].length;j+=2){
					for (var r=0;r<4;r++){temp[1][j]=temp[1][j].replace(new RegExp(d[r],"g"),"_jsonconvtemp"+r+"_")}
				};
				temp[1]=temp[1].join('"')
			};
			x[i]=temp.join("<")
		};
		x=x.join(">");
		x=x.replace(/ ([^=]*)=([^ |>]*)/g,"><$1>$2</$1");
		x=x.replace(/>"/g,">").replace(/"</g,"<");
		for (var r=0;r<4;r++){x=x.replace(new RegExp("_jsonconvtemp"+r+"_","g"),d[r])}	;
		return x
}


if(!Array.prototype.push){
	Array.prototype.push=function(x){
		this[this.length]=x;
		return true
	}
};

if (!Array.prototype.pop){
	Array.prototype.pop=function(){
  		var response = this[this.length-1];
  		this.length--;
  		return response
	}
};