flex上传图片

flex上传图片需引用UploadPostHelper.as

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protected function btnClick(event:MouseEvent):void
??? ??? ??? {
??? ??? ??? ??? //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 );
??? ??? ??? ???
??? ??? ??? ??? var loader:URLLoader = new URLLoader();
??? ??? ??? ??? loader.dataFormat=URLLoaderDataFormat.BINARY;
??? ??? ??? ??? loader.addEventListener(Event.COMPLETE,onComplete);
??? ??? ??? ??? loader.addEventListener(IOErrorEvent.IO_ERROR,onIOErr);
??? ??? ??? ??? loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR,onSecurity);
??? ??? ??? ??? loader.load(request);
??? ??? ??? }

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UploadPostHelper.as

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package fx.util { ??? 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 UploadPostHelper { ??? ??? ??? ??? /** ??? ??? ?* 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; ??? ??? } ??? ??? ??? ??? /** ??? ??? ?* Create post data to send in a UrlRequest ??? ??? ?* @param fileName:String 上传文件的名字 "xxx.txt/xxx.jpg/xxx.pdf" ??? ??? ?* @param byteArray:ByteArray 上传文件的文件内容 ??? ??? ?* @param uploadDataFieldName:String 上传数据字段的名字 默认值=filedata ??? ??? ?* @param parameters:Object 参数 默认值=null ??? ??? ?*/ ??? ??? public static function getPostData(fileName:String,byteArray:ByteArray,uploadDataFieldName:String = "filedata",parameters:Object = null):ByteArray { ??? ??? ??? ??? ??? ??? 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(parameters == null) { ??? ??? ??? ??? parameters = new Object(); ??? ??? ??? } ??? ??? ??? //设置上传文件名到parameters里 ??? ??? ??? parameters.Filename = fileName; ??? ??? ??? ??? ??? ??? //遍历parameters中的属性 ??? ??? ??? //add parameters to postData ??? ??? ??? for(var name:String in 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(parameters[name]); ??? ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? } ??? ??? ??? ??? ??? ??? //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(byteArray,byteArray.length); ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? ??? ??? ??? //add upload filed to postData ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? postData = BOUNDARY(postData); ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? bytes = 'Content-Disposition: form-data; name="Upload"'; ??? ??? ??? for ( i = 0; i < bytes.length; i++ ) { ??? ??? ??? ??? postData.writeByte( bytes.charCodeAt(i) ); ??? ??? ??? } ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? bytes = 'Submit Query'; ??? ??? ??? for ( i = 0; i < bytes.length; i++ ) { ??? ??? ??? ??? postData.writeByte( bytes.charCodeAt(i) ); ??? ??? ??? } ??? ??? ??? postData = LINEBREAK(postData); ??? ??? ??? ??? ??? ??? //closing boundary ??? ??? ??? postData = BOUNDARY(postData); ??? ??? ??? postData = DOUBLEDASH(postData); ??? ??? ??? ??? ??? ??? return postData; ??? ??? } ??? ??? ??? ??? /** ??? ??? ?* 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 = UploadPostHelper.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; ??? ??? } ??? ??? ??? } }