Request Feature: Support attribute 'download' at 'a' tag in WebView

I use this javascript code to save my data from page:

function download(filename, text) {
var pom = document.createElement('a');
pom.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
pom.setAttribute('download', filename);

if (document.createEvent)

{ var event = document.createEvent('MouseEvents'); event.initEvent('click', true, true); pom.dispatchEvent(event); }

else

{ pom.click(); }

}

This code set preferred filename in 'download' attribute.
When I download file from page preferred filename (data from 'download' attribute) will be lost.

I cannot get it from any properties of object QNetworkRequest.