title: Nodejs + expressjs get http response as Buffer
body: <p>I would like to send a Buffer through Http response, but on the client I receive it as string instead of Buffer. I use expressjs router, as below code</p>
  
  <pre><code>router.get('/', function(req, res, next) {
    const buf = new Buffer('Hello world');
    console.log(buf); // gives me &lt;Buffer 48 65 6c 6c 6f 20 77 6f 72 6c 64&gt;
    res.send(buf); // gives me 'Hello world' 
  });
  </code></pre>
  
  <p>In the above code my expected result was Buffer () but I get the String output 'Hello World.</p>
  
  <p>Someone help me out. Thanks in advance.</p>