actionscript里面如何上传文件到服务端？

前言

最近看回以前的浮士德增强修改版，发现以前的图片上传方式不是规范，所以这里又拿了网上的一份代码改成了可以上传文件的形式。想要浮士德头像裁剪增强版源代码的话，后面会给出来的。

工具类

package easis.common{    import flash.events.*;    import flash.net.*;    import flash.utils.ByteArray;    import flash.utils.Endian;    /**     * Take a fileName, byteArray, and parameters object as input and return ByteArray post data suitable for a UrlRequest as output     *     * @see http://marstonstudio.com/?p=36     * @see http://www.w3.org/TR/html4/interact/forms.html     * @see http://www.jooce.com/blog/?p=143     * @see http://www.jooce.com/blog/wp%2Dcontent/uploads/2007/06/uploadFile.txt     * @see http://blog.je2050.de/2006/05/01/save-bytearray-to-file-with-php/     *     * @author Jonathan Marston     * @version 2007.08.19     *     * This work is licensed under a Creative Commons Attribution NonCommercial ShareAlike 3.0 License.     * @see http://creativecommons.org/licenses/by-nc-sa/3.0/     *     */    public class UploadPostHelper2{        /**         * Boundary used to break up different parts of the http POST body         */        private static var _boundary:String = "";        /**         * Get the boundary for the post.         * Must be passed as part of the contentType of the UrlRequest         */        public static function getBoundary():String {            if(_boundary.length == 0) {                for (var i:int = 0; i < 0x20; i++ ) {                    _boundary += String.fromCharCode( int( 97 + Math.random() * 25 ) );                }            }            return _boundary;        }//      //要上传的图片//      var one4data:Bitmap= model.scanvo.currentScanImage;//      //图片转换成字符数组//      //对传送数据编码(很重要)//      var data:ByteArray=new JPGEncoder().encode(one4data.bitmapData); //      //      var url:String="http://www.test.com/upload/UploadAction.action";//上传地址自己根据实际情况定//      var request:URLRequest=new URLRequest(url);//      //form表单提交，同时声明分隔符boundary//      request.contentType="multipart/form-data; boundary="+UploadPostHelper.getBoundary();//      request.requestHeaders.push(new URLRequestHeader( 'Cache-Control', 'no-cache'));//      request.method=URLRequestMethod.POST;//      //设置上传文件名和上传数据//      //      //getPostData()方法主要是根据RFC1867来处理数据//      request.data=UploadPostHelper.getPostData("test.jpg",data );        private var _req:URLRequest;        private var _parameters={};        private var _fileMap:Array=[];        public function  UploadPostHelper2(url:String){            _req=new URLRequest(url);                    //form表单提交，同时声明分隔符boundary                    _req.contentType="multipart/form-data; boundary="+UploadPostHelper2.getBoundary();                    _req.requestHeaders.push(new URLRequestHeader( 'Cache-Control', 'no-cache'));                    _req.method=URLRequestMethod.POST;                  }        /***         * 添加参数进去。         * ***/        public function addParameter(key:String,value:String){            _parameters[key]=value;        }        /****         * 添加文件内容进去。         * ***/        public function addFile(fileName:String,uploadFieldName:String,fileContent:ByteArray){            this._fileMap.push({            fileName:fileName            ,fieldName:uploadFieldName            ,content:fileContent            });        }        /***         * 设定request的主体部分。         * ***/        private function setReqData(){            var i: int;            var bytes:String;            var postData:ByteArray = new ByteArray();            //更改或读取数据的字节顺序            postData.endian = Endian.BIG_ENDIAN;            //add Filename to parameters            if(this._parameters== null) {                this._parameters = new Object();            }            //遍历parameters中的属性            //add parameters to postData            for(var name:String in this._parameters) {                postData = BOUNDARY(postData);                postData = LINEBREAK(postData);                bytes = 'Content-Disposition: form-data; name="' + name + '"';                for ( i = 0; i < bytes.length; i++ ) {                    postData.writeByte( bytes.charCodeAt(i) );                }                postData = LINEBREAK(postData);                postData = LINEBREAK(postData);                postData.writeUTFBytes(this._parameters[name]);                postData = LINEBREAK(postData);            }            for(var j=0;j< this._fileMap.length;j++){                var fileItem=this._fileMap[j];                var uploadDataFieldName=fileItem.fieldName;                var fileName=fileItem.fileName;                var fileContent=fileItem.content;                //add Filedata to postData                postData = BOUNDARY(postData);                postData = LINEBREAK(postData);                bytes = 'Content-Disposition: form-data; name="'+uploadDataFieldName+'"; filename="';                for ( i = 0; i < bytes.length; i++ ) {                    postData.writeByte( bytes.charCodeAt(i) );                }                postData.writeUTFBytes(fileName);                postData = QUOTATIONMARK(postData);                postData = LINEBREAK(postData);                bytes = 'Content-Type: application/octet-stream';                for ( i = 0; i < bytes.length; i++ ) {                    postData.writeByte( bytes.charCodeAt(i) );                }                postData = LINEBREAK(postData);                postData = LINEBREAK(postData);                postData.writeBytes(fileContent, 0, fileContent.length);                postData = LINEBREAK(postData);            }                       //closing boundary            postData = BOUNDARY(postData);            postData = DOUBLEDASH(postData);                    _req.data=postData;        }        public function getUrlRequest():URLRequest {            this.setReqData();            return this._req;        }        /**         * Add a boundary to the PostData with leading doubledash 添加以双破折号开始的分隔符         */        private static function BOUNDARY(p:ByteArray):ByteArray {            var l:int = UploadPostHelper2.getBoundary().length;            p = DOUBLEDASH(p);            for (var i:int = 0; i < l; i++ ) {                p.writeByte( _boundary.charCodeAt( i ) );            }            return p;        }        /**         * Add one linebreak 添加空白行         */        private static function LINEBREAK(p:ByteArray):ByteArray {            p.writeShort(0x0d0a);            return p;        }        /**         * Add quotation mark 添加引号         */        private static function QUOTATIONMARK(p:ByteArray):ByteArray {            p.writeByte(0x22);            return p;        }        /**         * Add Double Dash 添加双破折号--         */        private static function DOUBLEDASH(p:ByteArray):ByteArray {            p.writeShort(0x2d2d);            return p;        }    }}

使用方式

            //生成编码容器            var jpgEncoder:JPGEncoder = new JPGEncoder(100);            //将位图数据编码到容器内成为ByteArray流            //var jpgStream:ByteArray = jpgEncoder.encode(_srcBmd);            var jpgStream = new ByteArray();            jpgStream.writeBytes(jpgEncoder.encode(_newBmd));            var jpgSrcStream=new ByteArray();            jpgSrcStream.writeBytes(jpgEncoder.encode(_srcBmd));            var uploadPostHelper=new UploadPostHelper2(_uploadUrl);            uploadPostHelper.addFile("thumb.jpg",Param.imageUploadKey,jpgStream);            if(Param.uploadSrc){                uploadPostHelper.addFile("src.jpg",Param.imageSrcUploadKey,jpgSrcStream);            }            var jpgURLRequest:URLRequest = uploadPostHelper.getUrlRequest();            var loader:URLLoader = new URLLoader();            //loader.addEventListener(Event.COMPLETE, this.uploadComplete);            loader.addEventListener(Event.COMPLETE, this.uploadComplete);            loader.addEventListener(IOErrorEvent.IO_ERROR, this.errorHandler);            loader.load(jpgURLRequest);