IBM Watson tone analyzer post request issue

Question

I am student and learning to code and help from community is appreciated. I have hosted my code in heroku with domain name https://depionicapp.herokuapp.com/. When I am doing post request with postman I am getting Error 500 but with cloud 9 I am able to get the result.

var http = require('http');
var bodyParser = require("body-parser")
var vision = require('@google-cloud/vision');
// Authorizing on a per-API-basis. You don't need to do this if you auth on a 
// global basis (see Authorization section above). 
var express = require('express');
var router = express();

var visionClient = vision({
  projectId: 'ionic-face-api',
  keyFilename: './ionic.json'
});

router.use(bodyParser.urlencoded({extended: false }));
router.use(bodyParser.json());

router.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

var server = http.createServer(router);
router.post('/info', function(req, res) {
  var text = req.body.text;
  console.log(text)
  var ToneAnalyzerV3 = require('watson-developer-cloud/tone-analyzer/v3');

  var tone_analyzer = new ToneAnalyzerV3({
    username: 'username',
    password: 'password',
    version_date: '2016-05-19'
  });

  tone_analyzer.tone({
      text: text
  }, function(err, tone) {
    if (err)
     console.log(err);
    else
     res.send((JSON.stringify(tone, null, 2)));
  });
});

Postman:

Postman request: https: //depionicapp.herokuapp.com/info
Content - Type: application / json 
Body I am sending from postman
{"text": "I am good.....blah blah..." }// Error 500

Answer 1

So, trying to help you. I edit your code deleting the vision module and just create one server in Node.js for test your code, works perfectly.

File toneExample.js:

var http = require('http');
var bodyParser = require("body-parser");
var express = require('express');
var router = express();

router.use(bodyParser.urlencoded({extended: false}));
router.use(bodyParser.json());

router.post('/info', function(req, res) {
    var text = req.body.text;
    console.log(text)
    var ToneAnalyzerV3 = require('watson-developer-cloud/tone-analyzer/v3');

    var tone_analyzer = new ToneAnalyzerV3({
     username: 'yourUsername',
     password: 'yourPassword',
     version_date: '2016-05-19'
     });

    tone_analyzer.tone({
        text: text
    }, function(err, tone) {
    if (err) console.log(err);
    else res.send((JSON.stringify(tone, null, 2)));
    })
});

module.exports = router;

File server.js:

var server = require('./toneExample.js');
var port = process.env.PORT || process.env.VCAP_APP_PORT || 3000;

server.listen(port, function() {
  console.log('Server running on port: %d', port);
});

After executing node server.js, I did one example in POSTMAN for the /info endpoint and I get the results successful:

Info:

• Node version: 6.11.2
• Modules installed: express, body-parser, watson-developer-cloud

Obs.: If you use the version_date: 2017-09-21 the return results for the post tone IDs: anger, fear, joy, sadness, analytical, confident, and tentative. And the returns results only for tones whose scores meet a minimum threshold of 0.5.

See more about in the Official API Reference. I recommend to you try to check the headers that you need to sent, the type of you can use in your body post, some stuffs like that.