Question: I have many of these "controllers": 

```
app.get('/',function(req,res){
    var stuff = { 'title': 'blah' };
    res.render('mytemplate',stuff);
});    

```

Notice res.render? I want to add this header to every response header I make:

`X-XSS-Protection: 0`

How can I add that response header automatically?

Answer: 
```
// global controller
app.get('/*',function(req,res,next){
    res.header('X-XSS-Protection' , 0 );
    next(); // http://expressjs.com/guide.html#passing-route control
});

```

Just make sure this is the first controller you add, order is significant.
you could create your own middleware method like so:

```
addToHeader = function (req, res, next) {
  console.log("add to header called ... " + req.url);
  res.header('X-XSS-Protection', '0');
  next();
}

```

and then change your routes to sth like this:

```
app.get('/', addToHeader, function(req,res){
  var stuff = { 'title': 'blah' };
  res.render('mytemplate',stuff);
});

```

should work.