File upload weird problem

Wed, 05 Mar 2008 07:25:55 -0800

Hello,

I have a weird problem with the file upload using Wicket.

I have a flex application on client side, and the user can upload some files. Flex code is as simple as:
var fr:FileReference=new FileReference();
fr.addEventListener(Event.SELECT, function(e:Event):void {
    var postVariables:URLVariables = new URLVariables;
    postVariables.sessionid = "qwerttrew"; // some content here

    var req:URLRequest = new URLRequest;
    req.url = "" class="moz-txt-link-rfc2396E" href="http://localhost:8080/path/to/my/wicket/script/">"http://localhost:8080/path/to/my/wicket/script/";
    req.method = URLRequestMethod.POST;
    req.data = "">
                    
    fr.upload(req);
});
                
fr.addEventListener(HTTPStatusEvent.HTTP_STATUS, function(e:HTTPStatusEvent):void {            
    if(e.status == 500) Alert.show("Une erreur a été rencontrée. Veuillez réessayer!");
});
                
fr.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA, function(e:Event):void {     
    trace("upload complete");    
});
                
fr.addEventListener(IOErrorEvent.IO_ERROR, function(e:Event):void {
    Alert.show("IOError: "+e);
});
                
fr.browse([new FileFilter("Fichiers autorisés", "*.jpeg;*.jpg;*.png;*.swf")]);

On the wicket side, the code is:
Request request = getRequest();
if (!(request instanceof ServletWebRequest)) {
    return;
}

ServletWebRequest swr = (ServletWebRequest) request;
HttpServletRequest hsr = swr.getHttpServletRequest();

if (!ServletFileUpload.isMultipartContent(hsr)) { return; }

MultipartServletWebRequest mswr;
try {
    mswr = new MultipartServletWebRequest(hsr, Bytes.megabytes(2));
} catch (FileUploadException e) {
    e.printStackTrace();
    throw new RuntimeException("Unable to get uploaded file!", e);
}
               
String sessionid = mswr.getParameter("sessionid");
Map map = mswr.getFiles();
               
for (Object o : map.keySet()) {
    Object object = map.get(o);
                   
    if (object instanceof DiskFileItem) {
        DiskFileItem dfi = (DiskFileItem) object;
        File originalFile = dfi.getStoreLocation();
                       
        if (originalFile.length() <= 0) {
            throw new IOException("No data were sent!"); // <-- THROW THIS EXCEPTION WITH SOME FILES!!
        }
                       
        File directory = new File(AbstractApplication.get().getUploadFolder(), "logos");
        directory = new File(directory, "temp");
        directory.mkdirs();
                       
        File tempFile = new File(directory, sessionid + "_" + tref + "." + FileUtils.getExt(dfi.getName()));
                       
        try {
            if (!FileUtils.move(originalFile, tempFile)) {
                throw new IOException("Unable to move file from source to target!");
            }

        } catch (IOException e) {
            throw new AbortWithHttpStatusException(500, false);
        }
        break;
    }
}

Well, this works fine, except with some specific files. I've a file "a.png", and it is always uploaded successfully. And I've a file "b.png", which always fail!! (they are both very close on theire size, several KB).

When it comes on the wicket code, the file length is 0 bytes... I'm not very sure that it's a wicket problem, it may also be a Flex one... But I never saw any thread on the Flex forums that speak about upload problems...

Could anybody explain what is the problem?

Thank you very much!
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