capturing errors from templates

[atheros]

I use the code:

var stream = nsmarty.assign(template, data);
util.pump(stream, req.res);

Since nsmarty uses asynchronous calls, it is impossible to capture any kinds of errors. Everything nsmarty (or the libraries it uses) throws lands in uncaughtExeption event handler on the process.

The sideeffect is that in case of a template error (unclosed block, syntax error, whatever), the connection from the browser is pending forever (until the socket timesout) and it is impossible to send an error message.

A very helpfull thing would be to add method accepting a standard callback, like:

nsmarty.fetch(mytemplate, data, function (err, result) {
   if (err) {
      res.end(someErrorPage());
   } else {
      res.end(result);
   }
}