upload image use application/octet-stream header

imageUpload.as

var jpgencoder:JPGEncoder = new JPGEncoder(80);
var ba:ByteArray = jpgencoder.encode(Bitmap(_arrPhotos[0].photo).bitmapData);

var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream");
var request:URLRequest = new URLRequest("http://api.wwwins.com.tw/saveImg.php?category=" + arrSwitchBtnValue[indexSwitch]);
var loader:URLLoader = new URLLoader();
request.requestHeaders.push(header);
request.method = URLRequestMethod.POST;
request.data = ba;
loader.load(request);