Web API crawler on node.js

crawler.js

var Q = require('q');
var request = Q.denodeify(require('request'));
	
var domain = "http://challenge.shopcurbside.com/";
var localSessionId;

function getSession() {
  var response = request({
    uri: domain + 'get-session',
    method: 'GET'
  })
  return response.then(function (res) {
	  return res[0].body;
  })
}

function getNode(nodeId,sessionId) {
  var response = request({
    uri: domain + nodeId,
    method: 'GET',
	  headers: {"Session" : sessionId}
  })
	
  return response.then(function (res) {
	  var jsonobj = JSON.parse(res[0].body);
	  
	  if(jsonobj.error) {
			throw new Error(jsonobj.error)
	  } else {
			return jsonobj;
	  }
  }).then(function (res) {
		
		if(res.secret) {
			process.stdout.write(res.secret);
		}
		
		return res;
	}, function (error) {
    if(error.message == "\"Session\" header is missing. \"/get-session\" to get a session id." || error.message == "Invalid session id, a token is valid for 10 requests.") {

			var session = getSession();
			return session.then(function (newSessionId) {
				localSessionId = newSessionId;
				return getNode(nodeId,newSessionId);
			})
	  } else {
			//console.log('Unhandled error: ' + error);
	  }
	});
}

function getChildren(nodeArray) {
	var idx = 0;
	var childrenArray = [];
	
	function getChildNode(nodeId) {
		return getNode(nodeId,localSessionId).then(function(node) {
			var promise1;
			var promise2;
			
			var childNodes = node['next'];
			if(!childNodes) {
				childNodes = node['nExt'];
			} 
			if(!childNodes) {
				childNodes = node['neXT'];
			}

	    if(childNodes) {
				childrenArray = childrenArray.concat(childNodes);
	    }
			
	    idx++;
	    if(idx < nodeArray.length) {
	        getChildNode(nodeArray[idx]);
	    } else {
	    	getChildren(childrenArray);
	    }
			
		});
	
	}
	
	return getChildNode(nodeArray[0]);
}

var nodeArray = ["start"];
getChildren(nodeArray);