as3访问WebService,SOAP协议

//功能实现：访问WebService,传入一张大图，以及需要的尺寸，由server转换成小图，返回图片流。
//实现要点：获取wsdl,解析XML(wsdl.data),获取需要的方法，以soap协议方式调用方法传递参数，并获取返回值（图片ByteArray）,显示。

//代码：
//ServiceLoader.as

package com.meetexpo.webService {
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.net.URLLoaderDataFormat;
    import flash.net.URLRequestHeader;
    import flash.net.URLRequestMethod;
    import flash.events.*;
    
    public class ServiceLoader extends URLLoader {
        private var _hostName:String;
        private var _namespace:String;
        private var _serviceName:String;
        private var _parameters:Array;
        
        public function ServiceLoader(hostName:String,nameSpace:String,serviceName:String,parameters:Array) {
            _hostName = hostName;
            _namespace = nameSpace;
            _serviceName=serviceName;
            _parameters = parameters;
            var serviceRequest:URLRequest = generateURLRequest();
            
            this.dataFormat = URLLoaderDataFormat.TEXT;
            this.load(serviceRequest);
            //this.addEventListener("ioError" ,err);
            //this.addEventListener(Event.COMPLETE,xmlLoaded);
        }
        private function generateURLRequest():URLRequest {
            var soap:Namespace = new Namespace("http://schemas.xmlsoap.org/soap/envelope/");
            var serviceRequest:URLRequest = new URLRequest(_hostName);
            serviceRequest.method = URLRequestMethod.POST;
            serviceRequest.requestHeaders.push(new URLRequestHeader("Content-Type", "text/xml;charset=utf-8"));
            serviceRequest.requestHeaders.push(new URLRequestHeader("SOAPAction", _namespace+"/"+_serviceName));
            var rXML:XML =
            <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://logic.backend.imageservice.inshow.com" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" >
            <soap:Body/>
            </soap:Envelope>;
            
            //var conditionStr:String = "<"+_serviceName+" xmlns=\"http://tempuri.org/\">";
            var conditionStr:String = "<" + _serviceName + " xmlns=\"" + _namespace + "\">";
            
            for (var i:Number=0; i<_parameters.length; i++) {
            conditionStr+="<"+_parameters[i][0]+">"+_parameters[i][1]+"</"+_parameters[i][0]+">";
            }
            
            conditionStr += "</" + _serviceName + ">";
            
            var conditionXML:XML = new XML(conditionStr);
            rXML.soap::Body.appendChild(conditionXML);
            trace(rXML)
            serviceRequest.data = rXML;
            return serviceRequest;
        }
      
        public function xmlLoaded(e:Event):void{
                //trace("--------------------")
                //trace(e.eventInfo.method)
                //trace(e.eventInfo.data)
                //trace("--------------------")
                var listXML:XML = XML(this.data);
                trace(">>>>") ;
            }
            public function err(e:Event):void{
                trace(">>>>") ;
            } 
    }
}

//Main.as

package com
{
    import com.ServiceLoader;
    import com.Base64;
    import flash.display.Bitmap;
    import flash.display.Loader;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.display.BitmapData;
    import flash.utils.ByteArray;
    
    public class Main extends Sprite
    {
        public function Main():void
        {
            var parameters:Array = new Array();
            parameters[0] = ["in0", "http://www.bit-101.com/speaking/FITCAM2009.jpg"];
            parameters[1] = ["in1", "100"];
            parameters[2] = ["in2", "100"];
            var loader:ServiceLoader = new ServiceLoader("http://192.168.1.19:8080/image-service/services/ImageMagicService","http://logic.backend.imageservice.inshow.com","imgResize",parameters);
            
            loader.addEventListener("ioError" ,err);
            loader.addEventListener(Event.COMPLETE, xmlLoaded);
            //loader.addEventListener(ProgressEvent.PROGRESS,singleHouseProgressHandler);

            function xmlLoaded(e:Event):void{
                //trace("--------------------")
                //trace(e.eventInfo.method)
                //trace(e.eventInfo.data)
                //trace("--------------------")
                /*var loader:Loader = new Loader();
                var binary:ByteArray = evt.target.data as ByteArray;
                loader.loadBytes(binary);
                addChild(loader);*/
                var listXML:XML = XML(loader.data);
                //addChild(listXML)
                //e.MyEventerGC(); 
                var tempLoader:Loader = new Loader();
                //解码
                var decoded:ByteArray = Base64.decodeToByteArray(listXML.children().children().children());   
                tempLoader.loadBytes(decoded);
                addChild(tempLoader);
            }
            function err(e:Event):void{
                trace(">>>>") ;
                //e.MyEventerGC(); 
            }
        }
    }
}