node.js function snippet showing a REST API call to Twilio to call a phone. Full source code is at https://github.com/ismaelc/twilio-translator

callPhoneFromTwilio.js

// Builds the call request so Twilio can call the user's phone with the local voice of the translation, using a text to speech API
exports.makeCall = function (req, res) {
   // TODO: Check if function is called from same app
   var translatedText = req.query.t;
   var to = req.query.to;
   var lang = req.query.lang;

   // The parameters needed by Twilio to make the call.  The Url parameter returns a Twiml that dictates what happens when 
   // the call is picked up.  
   var postdata = qs.stringify({
         'From': config.twilio.number,
         'To': to,
         'Url': config.app.url + 'getTwimlToCall?t=' + encodeURIComponent(translatedText) + '&lang=' + lang
      });

   // Setting up the Twilio API endpoint for making calls
   var options = {
      host: 'api.twilio.com',
      path: '/2010-04-01/Accounts/' + config.twilio.sid + '/Calls.xml',
      port: 443,
      method: 'POST',
      headers: {
         'Content-Type': 'application/x-www-form-urlencoded',
         'Content-Length': postdata.length
      },
      auth: config.twilio.sid + ':' + config.twilio.token
   };

   var request = https.request(options, function (res2) {
      res2.setEncoding('utf8');
      res2.on('data', function (chunk) {
         console.log('Response: ' + chunk);
         res.send(chunk, {
               'Content-Type': 'text/xml'
            }, 200);

      })
   })

   // Make the call
   request.write(postdata);
   request.end();
}