问题
I want to upload data (not a local file) with Flex (4.1), and show what the progress is of the bytes sent.
Now I use a URLLoader, but I know that URLLoader was designed to download data, I can connect a listener to ProgressEvent.PROGRESS but that has no effect.
I also know there is a FileReference object which supports uploading. The problem here is, I do not want to browse for a file and upload it. I have a byte array which I want to send to the server, but the data property of FileReference is read-only.
So my question is: How can I send the byte array (which is actually a PNG encoded image) to the server and be able to track the progress of the bytes sent to server?
回答1:
Yes, you are right that the data property of FileReference is read-only, but you can track the progress.
If you want to use the URLLoader to upload data, you can try the uploadposthelp class.
You may have a look on the following site: http://labs.findsubstance.com/2008/04/03/as3-upload-encode-images/
来源：https://stackoverflow.com/questions/4114043/uploading-data-with-flex-and-getting-the-bytes-sent