private void fireWindowDownload(
String base64Data, String filename, String mimeTypeFromBase64Data) {
String newFilename = StringUtils.isEmpty(filename) ? "download.bin" : filename;
String newMimeType =
StringUtils.isEmpty(mimeTypeFromBase64Data)
? "application/octet-stream"
: mimeTypeFromBase64Data;
if (Blob.isSupported() && DownloadWindow.isSupported()) {
Blob blob = FileUtils.fromDataURI(base64Data);
DownloadWindow.createIfSupported().openSaveAsWindow(blob, newFilename);
} else if (org.cruxframework.crux.core.client.file.URL.isSupported()) {
Blob blob = FileUtils.fromDataURI(base64Data);
Anchor anchor =
createDownloadAnchor(
org.cruxframework.crux.core.client.file.URL.createObjectURL(blob), newFilename);
clickElement(anchor.getElement());
} else if (hasHTML5DownloadAttributeSupport()) {
Anchor anchor = createDownloadAnchor(base64Data, newFilename);
clickElement(anchor.getElement());
} else {
// Note that encodeURIComponent produces UTF-8 encoded text. The mime type should contain
// the charset=UTF-8 parameter. In case you don't want the data to be encoded as UTF-8
// you could use escape(data) instead.
// Javascript: window.open("data:"+mimetype+","+encodeURIComponent(data), '_blank', '');
// Is it working? If is not, read:
// http://stackoverflow.com/questions/607176/java-equivalent-to-javascripts-encodeuricomponent-that-produces-identical-outpu
Window.open(
"data:" + newMimeType,
URL.encodeQueryString(Base64Utils.ensurePlainBase64(base64Data)),
"_blank");
}
}
private static Anchor createDownloadAnchor(String base64Data, String filename) {
Anchor anchor = new Anchor();
anchor.setHref(base64Data);
anchor.setTarget("_blank");
anchor.getElement().setAttribute("download", filename);
return anchor;
}