Node.js TLS client example

Couldn’t find good end to end example of Node.js new raw SSL client API, so here is one. This snippet just connects to the https://encrypted.google.com and fetches the front page.

tls = require('tls');

// callback for when secure connection established
function connected(stream) {
    if (stream) {
       // socket connected
      stream.write("GET / HTTP/1.0\n\rHost: encrypted.google.com:443\n\r\n\r");  
    } else {
      console.log("Connection failed");
    }
}

// needed to keep socket variable in scope
var dummy = this;

// try to connect to the server
dummy.socket = tls.connect(443, 'encrypted.google.com', function() {
   // callback called only after successful socket connection
   dummy.connected = true;
   if (dummy.socket.authorized) {
      // authorization successful
      dummy.socket.setEncoding('utf-8');
      connected(dummy.socket);
   } else {
      // authorization failed
     console.log(dummy.socket.authorizationError);
     connected(null);
   }
});

dummy.socket.addListener('data', function(data) {
   // received data
   console.log(data);
});

dummy.socket.addListener('error', function(error) {
   if (!dummy.connected) {
     // socket was not connected, notify callback
     connected(null);
   }
   console.log("FAIL");
   console.log(error);
});

dummy.socket.addListener('close', function() {
 // do something
});

If you want to use client certificate authentication, define the options and give that as additional parameter to the tls.connect call.

var keyPem = fs.readFileSync("key-noenc.pem", encoding='ascii');
var certPem = fs.readFileSync("cert.pem", encoding='ascii');
var options = {key:keyPem, cert:certPem };

...
dummy.socket = tls.connect(443, 'some.example.com', options, function() {
....