如何在Node.js中创建派生的http（s）服务器？

Question

I want to derive the Node.js http(s) server, as I need to add some behavior.

Eg, I want to have an http server that also has a foobar function. So I want to be able to do something like this:

var server = http.createServer(function (req, res) { ... }).listen(3000);
server.foobar();

Of course I somehow need to derive from the http module, but how could I do this? Apparently there is no Http constructor I could override ...

Any ideas or hints?

Answer 1

I haven't tested, but giving in it a though I would say you would only have to:

var http = require('http');
http.Server.prototype.foobar = function () {};

As you can see here the createServer function is nothing but a factory instantiating a new Server object that was exposed two lines before.

Answer 2

The correct way is to create a subclass of the server.

var http = require('http')

class MyServer extends http.Server {
  foobar () {
    // any code
  }
}

var server = new MyServer(function (req, res) {
  // any code
})

If you are running a version of Node.js that is <1.0 you need to use the old class syntax:

var http = require('http')

function MyServer (handler) {
  http.Server.call(this, handler)
}

MyServer.prototype = Object.create(http.Server.prototype)

MyServer.prototype.foobar = function () {
  // any code
}

var server = new MyServer(function (req, res) {
  // any code
})