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POAIR: how to use FileReference.upload() with POST-based web services (AS3)
 

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  1. POAIR: how to use FileReference.upload() with POST-based web services (AS3)
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    <p>I can't seem to get this little AIR app I'm making to work right. There is a single button on the stage, and when the user presses it they are presented with a file browser (FileReference.browse() function). When they select an image file, I want the image to be uploaded to the site imgur.com (http://www.api.imgur.com for those interested).</p> <p>I'm getting a response from imgur, so I know my app is connecting, but it's returning an error, "No image data was sent to the upload API". Any help is greatly appreciated! (Also I do have an API key, just removed it from this post for obvious reasons :) )</p> <p>package {</p> <pre><code>import flash.display.MovieClip; import flash.events.*; import flash.net.*; import flash.utils.ByteArray; public class Document extends MovieClip { //file browser var var myFileReference:FileReference = new FileReference(); //file loader var private var loader:URLLoader; //string constants private const API_KEY:String = "******REMOVED*******"; private const UPLOAD_URL:String = "http://api.imgur.com/2/upload.xml"; public function Document() { // constructor code browse_btn.addEventListener(MouseEvent.CLICK, browse); } function browse(e:MouseEvent) { var imagesFilter:FileFilter = new FileFilter("Images", "*.jpg;*.gif;*.png"); myFileReference.browse([imagesFilter]); myFileReference.addEventListener(Event.SELECT, selectHandler); myFileReference.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA, responseHandler); } function selectHandler(e:Event):void { var vars:String = "?key=" + API_KEY + "&amp;name=name&amp;title=title"; var params:URLVariables = new URLVariables(); params.date = new Date(); var request:URLRequest = new URLRequest(UPLOAD_URL + vars); //request.contentType = "application/octet-stream"; request.contentType = "multipart/form-data"; request.method = URLRequestMethod.POST; request.data = params; myFileReference.upload(request); try { myFileReference.upload(request); } catch (error:Error) { trace("Unable to upload file."); } } function responseHandler(e:DataEvent):void { trace("responseHandler() initaialized"); var res:XML = XML(e.data); trace(res); } } </code></pre> <p>}</p>
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    1. CO`FileReference` is only for accessing local files - you have to use a `URLLoader` instance to send the raw image-data to the server (like in the example i posted). so open a file in the flashplayer (using `FileReference`) + create a `BitmapData` object from it ... then convert it to a `ByteArray` (PNGEncoder/JPEGEncoder...) and send this "raw" data to the server.
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    2. COThanks for the help! I got it working with the method you suggested. However, if I try and use a larger file (5-7mb) the swf locks up and returns an io stream error. Any idea?
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    3. COmmm, don't know. flash should be able to handle files up to 100MB. what is the error saying exactly? maybe there's an upload limit from the imgur-API!?
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