app.js

/**
 * Copyright 2014 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

var express = require('express'),
  app = express(),
  bluemix = require('./config/bluemix'),
  watson = require('watson-developer-cloud-alpha'),
  extend = require('util')._extend,
  fs = require('fs'),
  dummy_text = fs.readFileSync('mobydick.txt');


// Bootstrap application settings
require('./config/express')(app);

// if bluemix credentials exists, then override local
var credentials = extend({
    version: 'v2',
    url: '<url>',
    username: '<username>',
    password: '<password>'
}, bluemix.getServiceCreds('personality_insights')); // VCAP_SERVICES

// Create the service wrapper
var personalityInsights = new watson.personality_insights(credentials);

// render index page
app.get('/', function(req, res) {
  res.render('index', { content: dummy_text });
});

app.post('/', function(req, res) {
  personalityInsights.profile(req.body, function(err, profile) {
    if (err) {
      if (err.message){
        err = { error: err.message };
      }
      return res.status(err.code || 500).json(err || 'Error processing the request');
    }
    else
      return res.json(profile);
  });
});

var port = process.env.VCAP_APP_PORT || 3000;
app.listen(port);
console.log('listening at:', port);