ajax.js

wince 电池电源管理文件集 wince 电池电源管理文件集

// ajax object struct
// for DMForum.NET 1.1
// 2006-12-6

function class_ajax( suri,sdata,sonComplete,sonException,smethod )
// suri:资源位置
// sdata:传送的数据
// sonComplete:完成事件,有3个参数可用.分别是xmldom:xmldom对象;this.statusCode:返回信息代码;this.status:返回信息文本.其中后面两个只在您的源根节点是result且有code和message子节点的情况下可用
// sonException:异常事件,参数1个.为异常描述文本
// smethod:传输方式
{

	// -----------  publics  -----------//

	// source URI.
	this.uri = suri;
	// the request method type,default is POST
	this.method = smethod;
	if ( this.method == null ) this.method = "POST";
	// the request's datastream
	this.data = sdata;
	// ajax is enabled
	this.enabled = true;
	// request status
	this.statusCode = 0;
	this.statusText = "";

	// -----------  privates  -----------//

	// params
	
	var myonExceprion = sonException;

	// is microsoft's operasystem
	var isMicrosoft = false;

	// get microsoft's xmlhttpobject
	var getMsObject = function()
	{
		var msxmls = ["MSXML3", "MSXML2", "Microsoft"];
		var returnObj = null;

		for (var i = 0; i < msxmls.length; i++) {
			try
			{
				returnObj = new ActiveXObject(msxmls[i] + ".XMLHTTP");
				break;
			}catch (ex){}
		}
		return returnObj;
	}

	// if microsoft's object is null, try to get XMLHttpRequest object
	var getObjects = function()
	{
		var returnObj = getMsObject();

		isMicrosoft = true;

		if( returnObj == null )
		{
			isMicrosoft = false;
			try { returnObj = new XMLHttpRequest(); }
			catch (ex){ this.enabled = false; }
		}
		return returnObj;
	}

	// ------------ public method ------------ //

	// send the request and bind the complete handler

	this.processAnsyc = function( uri,callback )
	{
		var ajaxer = getObjects();
		if ( !this.enabled ) return false;
		try
		{
			ajaxer.open(this.method,this.uri,false);
			ajaxer.setRequestHeader("Method", "POST " + this.uri + " HTTP/1.1");
			ajaxer.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
			callback(ajaxer.responseBody);
		}catch(e){}

	}

	this.process = function(){
		// init request object
		var ajaxer = getObjects();
		if ( !this.enabled )
		{			
			if (myonExceprion != null ) myonExceprion("ajax-debug:没有可供使用的对象");
			return;
		}
		try
		{
			// bind the complete handler
			var toncomplete = sonComplete;
			if ( toncomplete == null && this.onComplete != null )
			{
				toncomplete = this.onComplete;
			}
			var thandler = this.shandler(ajaxer,toncomplete);

			ajaxer.onreadystatechange = thandler;

			// bind finally.start to send the data;

			if( this.method == "POST" )
			{
				ajaxer.open(this.method,this.uri,true);
				ajaxer.setRequestHeader("Method", "POST " + this.uri + " HTTP/1.1");
				ajaxer.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
				ajaxer.setRequestHeader("Accept","text/service");
				ajaxer.send(this.data);
			}
			else
			{
				// to get
				ajaxer.open(this.method,this.uri + "?" + this.data,true);
				ajaxer.send(this.data);
			}
		}catch(e)
		{
			// exception raise
			if ( this.method == "POST" )
			{
				try{
					// try to get
					ajaxer.open("GET",this.uri + "?" + this.data,true);
					ajaxer.send(this.data);
				}catch(ex){
					//send process fail.
					if ( myonExceprion != null ) myonExceprion("ajax-debug:发送尝试步骤全部失败,请求被终止");
				}
			}
			else
			{
				if ( myonExceprion != null ) myonExceprion("ajax-debug:发送尝试步骤全部失败,请求被终止");
			}
		}
		delete(ajaxer);
	}

	this.shandler = function( Ajaxer,completehandler )
	{
		return function(){
			if ( Ajaxer.readyState == 4 )
			{
				if ( Ajaxer.status == 200 )
				{
					try 
					{
						var xmldom = new class_xmldom(Ajaxer.responseXML,Ajaxer.responseText);
						
						var node = xmldom.selectSingleNode("/result/code");
						var messagenode = xmldom.selectSingleNode("/result/message");
						if ( node != null && messagenode != null )
						{
							try
							{
								this.statusCode = parseInt(node.Text);
								this.statusText = "ajax-debug:" + messagenode.Text;
							}catch(e){}
						}
						completehandler(xmldom,this.statusCode,this.statusText);
					} catch ( ex ) { if (myonExceprion != null ) myonExceprion("ajax-debug:" + ex); }
					finally 
					{
						if ( Ajaxer != null ) delete(Ajaxer);
					}
				}
				else
				{
					if ( myonExceprion != null ) myonExceprion("ajax-debug:接口返回HTTP状态码 " + Ajaxer.status + ",任务终止");
				}

			}
		}
	}


	// ------------ load ------------ //

	if ( this.uri != null && this.uri.length > 0 ) this.process();
	
}