How to download file in GWT?

[Thai]

I want to create a button so that when it is clicked, it calls a
service which will prepare a file and send it to the client browser.
How can I do that?

Thanks for any of your idea.

[Peter Blazejewicz]

hi Thai,

maybe via A tag?

private HTML createDownloadLink(String url, String label) {
StringBuffer toReturn = new StringBuffer("<a ");
toReturn.append("href=\"").append(url).append("\" target=\"_blank
\">");
toReturn.append(label).append("</a>");
return new HTML(toReturn.toString(), false);
}

and then:

rootPanel.add(createDownloadLink("yourfileuri?params", "download
file"));

regards,
Peter