File: //usr/syno/share/nginx/redirect_html.mustache
<!DOCTYPE html>
<html>{{#DSM}}
<body>
<input type="hidden" id="http" name="http" value="{{mainHttpPort}}">
<input type="hidden" id="https" name="https" value="{{mainHttpsPort}}">
<input type="hidden" id="prefer_https" name="prefer_https" value="{{#ssl.redirect}}true{{/ssl.redirect}}{{^ssl.redirect}}false{{/ssl.redirect}}">
</body>
<script type="text/javascript">
var protocol={{#ssl.redirect}}"https:"{{/ssl.redirect}}{{^ssl.redirect}}location.protocol{{/ssl.redirect}};
var port={{#ssl.redirect}}{{ssl.port}}{{/ssl.redirect}}{{^ssl.redirect}}location.protocol === "https:" ? {{mainHttpsPort}} : {{mainHttpPort}}{{/ssl.redirect}};
var URL=protocol+"//"+location.hostname+":"+port+location.pathname+location.search;
location.replace(URL);
</script>
{{/DSM}}</html>