How to set the location response HTTP header in Express framework?

Question

How to set the response Location HTTP header in Express? I've tried this, but it's not working:

  Controller.prototype.create = function(prop, res) {
    var inst = new this.model(prop);

    inst.save(function(err) {
      if (err) {
        res.send(500, err);
      }

      res.location = '/customers/' + inst._id;
      res.send(201, null);
    });
  };

This code is persisting a new document into MongoDB, and upon competition sets the location and send a 201 response. Got this response, no Location header is set:

HTTP/1.1 201 Created
X-Powered-By: Express
Content-Length: 0
Date: Mon, 18 Feb 2013 19:08:41 GMT
Connection: keep-alive

Answer 1

you're setting res.location. res.location is a function.

res.location('/customers/' + inst._id)

Answer 2

The res object exposes setHeader():

res.setHeader('Location', foo);

Try that instead of res.location.