how to remove X-Powered-By in ExpressJS

I want to remove X-Powered-By for Security,Save Bandwidth in ExpressJS(node.js). how to do it? it could be filter(app.use) ?

app.use(function(req,res,next_cb){ /* remove X-Powered-By header */ next_cb(); }

The better way to do it is:

app.disable('x-powered-by');

Note that although the header may appear with capital letters when sent, for app.disable to work properly, x-powered-by must be entirely lower case.

You can also make a middleware to remove any header like so:

app.use(function (req, res, next) {
  res.removeHeader("X-Powered-By");
  next();
});

See more info on how to remove a header:

http://nodejs.org/api/http.html#http_response_removeheader_name