For binary output, use a (web)resource. For instance, something like this:
WebResource export = new WebResource() {
@Override
public IResourceStream getResourceStream() {
CharSequence discounts = DataBase.getInstance()
.exportDiscounts();
return new StringResourceStream(discounts, "text/plain");
}
@Override
protected void setHeaders(WebResponse response) {
super.setHeaders(response);
response.setAttachmentHeader("discounts.csv");
}
};
export.setCacheable(false);
new ResourceLink(this, "exportLink", export);
Eelco
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