//gxlu/nova/web/framework/util/Ajax.js begin
/**
 * 封装Ajax前后台交互处理
 *  交互对象Server端的RemoteCallServlet接口
 *
 */

//==XML处理==Begin=========================
/**
 * 浏览器xml文本加载，文本方式直接加载只有IE支持
 * @param xml Xml文本
 */
function getXMLFromString(xml){
    alert(xml);
    var xmlDoc=false;
    //code for IE
    if(window.ActiveXObject){
        xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async="false";
        xmlDoc.loadXML(xml);
    }else{
        alert("您的浏览器不支持xml文本加载！");
    }
    alert(xmlDoc.xml);
    return xmlDoc;
}
/**
 * 远程xml加载
 * @param url Xml文件地址
 */
function getXMLFromString(url){
    var xmlDoc=false;
    // code for IE
    if (window.ActiveXObject)  {  
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");  
        xmlDoc.async=false;  
        xmlDoc.load(url);  
    }
    // code for Mozilla, etc.
    else if (document.implementation &&document.implementation.createDocument)  {  
        xmlDoc= document.implementation.createDocument("","",null);  
        xmlDoc.load(url);  
        xmlDoc.onload=getmessage  
    }else  {  
        alert('您的浏览器不支持远程xml加载！');  
    }
    return xmlDoc;
}

//==XML处理==End=========================



//XXX 原生调用
var http_request = false; 
//调用url、数据、反调函数、返回值类型（xml,text）
function asynchro_request(url,data,handle,rtType) {//初始化、指定处理函数、发送请求的函数 
    http_request = false; 
    //开始初始化XMLHttpRequest 对象 
    if(window.XMLHttpRequest) { //Mozilla  浏览器 
        http_request = new XMLHttpRequest(); 
        if (http_request.overrideMimeType) {//设置 MiME 类别 
            http_request.overrideMimeType("text/xml"); 
        } 
    }else if (window.ActiveXObject) { // IE 浏览器 
        try{ 
            http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
        } catch (e) { 
            try { 
                http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
            } catch (e) {} 
        } 
    } 
    if (!http_request) { // 异常，创建对象实例失败 
        window.alert("不能创建 XMLHttpRequest 对象实例."); 
        return false; 
    } 
    http_request.onreadystatechange = function processRequest(){ 
        if (http_request.readyState == 4) { // 判断对象状态 
            if(http_request.status == 200) { // 信息已经成功返回，开始处理信息 
                //默认返回数据已经是UTF-8编码    
                if(rtType!=undefined&&rtType=="text"){
                    var rt=http_request.responseText;                
                    handle(rt);
                }else{
                    var rt=http_request.responseXML;
                    handle(rt);
                }
            } else { //页面不正常 
                alert("您所请求的页面有异常。"); 
            } 
        } 
    }; 
    //  确定发送请求的方式和 URL 以及是否同步执行下段代码 
    http_request.open("POST", url, true);
    http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 
    http_request.send(data); 
    
    //alert("同步发送，当前Alert方法不能中断程序执行，数据很快将返回！")
}
//test
function asynchro_returnData(v){
    alert(v);
}
//test
function asynchro_sendTest(handle,rtType){
    var url="http://localhost:8888/nova/RemoteWebCallServlet";
    var sdata="queryxml=<NovaRemoteCallParVO><clientIP></clientIP><serviceName></serviceName>"
      +"<methodName></methodName><parClasses></parClasses><parObjs></parObjs></NovaRemoteCallParVO>";
    if(handle!=undefined){
        if(rtType!=undefined){
            asynchro_request(url,sdata,handle,rtType);
        }else{
            asynchro_request(url,sdata,handle);
        }        
    }else{
        if(rtType!=undefined){
            asynchro_request(url,sdata,asynchro_returnData,rtType);
        }else{
            asynchro_request(url,sdata,asynchro_returnData);
        }  
    }    
}

//同步请求处理
function synchro_request(url,data,handle,rtType){
    var http_request = false; 
    //开始初始化XMLHttpRequest 对象 
    if(window.XMLHttpRequest) { //Mozilla  浏览器 
        http_request = new XMLHttpRequest(); 
        if (http_request.overrideMimeType) {//设置 MiME 类别 
            http_request.overrideMimeType("text/xml"); 
        } 
    }else if (window.ActiveXObject) { // IE 浏览器 
        try{ 
            http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
        } catch (e) { 
            try { 
                http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
            } catch (e) {} 
        } 
    } 
    if (!http_request) { // 异常，创建对象实例失败 
        window.alert("不能创建 XMLHttpRequest 对象实例."); 
        return false; 
    } 
    http_request.open("POST",url,false);
    http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    http_request.send(data);        
    
    if(rtType!=undefined&&rtType=="text"){
        var rt=http_request.responseText;                
        handle(rt);
    }else{
        var rt=http_request.responseXML;
        handle(rt);
    }                
}
//
function synchro_sendTest(){
    var url=document.getElementById("send_url").value;
    var sdata=document.getElementById("send_data").value;
    if(sdata==""){
        sdata="Nothing!";
    }else{
        sdata="queryxml="+escape("此方法的同步方式取决于open方法中的bAsync参数");
    }
    synchro_request(url,sdata,function(v){document.getElementById("get_data").value=v;})            
}

/**
 * 同步方式远程调用，提交是以xml方式提交（注意暂时没有支持IE以外的浏览器）
 * 目的是解决直接Post数据的时候大文本不能提交，而以Xml对象方式提交是允许的
 * @param url 提交url地址
 * @param data xml文本
 * @param rtType text/xml
 */
function synchro_return_request(url,data,rtType){
    var http_request = false; 
    //开始初始化XMLHttpRequest 对象 
    if(window.XMLHttpRequest) { //Mozilla  浏览器 
        http_request = new XMLHttpRequest(); 
        if (http_request.overrideMimeType) {//设置 MiME 类别 
            http_request.overrideMimeType("text/xml"); 
        } 
    }else if (window.ActiveXObject) { // IE 浏览器 
        try{ 
            http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
        } catch (e) { 
            try { 
                http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
            } catch (e) {} 
        } 
    } 
    if (!http_request) { // 异常，创建对象实例失败 
        window.alert("不能创建 XMLHttpRequest 对象实例."); 
        return false; 
    } 
    
    http_request.open("POST",url,false);
    http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    //http_request.setRequestHeader("Content-Length",data.length);//上传信息长度    
    http_request.send(data);//上传的是Xml对象，不是普通param=value形式        
    
    if(rtType!=undefined&&rtType=="text"){
        var rt=http_request.responseText;
        //http_request=false;                
        return rt;
    }else{
        var rt=http_request.responseXML;
        // http_request=false;   
        return rt;
    }                
}


/**
 * 同步方式远程调用，直接在url中包含参数【GET方式】 
 * @param url 提交url地址
 * @param rtType text/xml
 */
function synchro_return_request_get(url,rtType){
    var http_request = false; 
	
	if(navigator.userAgent.indexOf('MSIE') == -1){   
		XMLDocument.prototype.selectSingleNode = Element.prototype.selectSingleNode = function (sXpath)
		{	
			var  x = this.selectNodes(sXpath)
			if ( ! x || x.length < 1 ) 
				return   null ;
			return  x[0];
		}
	
		XMLDocument.prototype.selectNodes = Element.prototype.selectNodes = function (sXpath)
		{

			var xpathObj=new XPathEvaluator();    
			if(xpathObj){    
				var result=xpathObj.evaluate(sXpath,this,null,XPathResult.ORDERED_NODE_ITEARTOR_TYPE,null);          
				var nodes=new Array();          
				var node;          
				while((node = result.iterateNext())!=null) {          
					nodes.push(node);         
				}          
				return nodes;    	
			}else{    
				return null;                                
			}    
		
		}
	
	}
	
    //开始初始化XMLHttpRequest 对象 
    if(window.XMLHttpRequest) { //Mozilla  浏览器 
        http_request = new XMLHttpRequest(); 
        if (http_request.overrideMimeType) {//设置 MiME 类别 
            http_request.overrideMimeType("text/xml"); 
        }
    }else if (window.ActiveXObject) { // IE 浏览器 
        try{
            http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
        } catch (e) { 
            try { 
                http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
            } catch (e) {} 
        } 
    } 
    if (!http_request) { // 异常，创建对象实例失败 
        window.alert("不能创建 XMLHttpRequest 对象实例."); 
        return false; 
    }
    http_request.open("GET",url,false);
    http_request.send(null);        
    
    if(rtType!=undefined&&rtType=="text"){
        var rt=http_request.responseText;
        return rt;
    }else{
        var rt=http_request.responseXML;
        return rt;
    }                
}



/**
 * 处理字串中的特殊字符：+(加号) '(单引号) "(双引号) /(路径)
 */  
function URLencode(sStr){
    return escape(sStr).replace(/\+/g, '%2B').replace(/\"/g,'%22').replace(/\'/g, '%27').replace(/\//g,'%2F');
}



//gxlu/nova/web/framework/util/Ajax.js end