my_vapi_host
my_vapi_port
my_saml_token
my_http_options

// Import required libraries.
var sso = require('./sso');
var https = require('https');
var gzip = require('gzip-js');

// Configure HTTP request.
var sessionPath = '/rest/com/vmware/cis/session';
var httpMethod = 'POST';

// Base64 encode the token value for the security context.
var b64Token = new Buffer(gzip.zip(my_saml_token)).toString('base64');

// Build the Authorization header value.
var start = 0;
var bufSize = 3 * 1024;
var prefix = 'SIGN ';
var authArray = [];
while (start < b64Token.length) {
  var end = start + bufSize;
  authArray.push(prefix + 'token="' + b64Token.slice(start, end) + '"');
  start = end;
  prefix = '';
}

// Prepare the HTTP request.
my_http_options = {
  host: my_vapi_host,
  port: my_vapi_port,
  path: sessionPath,
  method: httpMethod,
  rejectUnauthorized: false,
  requestCert: true,
  agent: false,
  headers: {
    'Authorization': authArray
  }
};

// Define the callbacks.
function callback(res) {
  res.on('error', function(err) { console.log('Login error: ', err) });
  res.on('data', function(chunk) {});
  res.on('end', function() {
    var cookieValue = res.headers['set-cookie'];
    my_http_options[headers] = {'Cookie': cookieValue,
                                'Content-Type': 'application/json'}  // Save the session ID.
  }
}

// Issue the login request.
https.request(my_http_options, callback).end();