Problem with reading image file in Firefox

[AkbarAzizi]

Hi,

Is there anybody who knows why my following java/Groovy code does not work in Firefox?

The function ImageIO.createImageInputStream returns NULL in Firefox.

The code works fine in Windows Explorer.

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def getImageFormat(CommonsMultipartFile imageFile) {

String imageFormat
def file = new File(imageFile.fileItem.name)
ImageInputStream imageStream = ImageIO.createImageInputStream(file);
if (imageStream != null) {
Iterator<ImageReader> readers = ImageIO.getImageReaders(imageStream);

if(readers.hasNext()) {
ImageReader reader = readers.next()
imageFormat = reader.getFormatName()
}

imageStream.close();
}

return imageFormat
}