app.js

/**
 * Copyright 2015 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.
 */

const express = require('express');

const app = express();
const SpeechToTextV1 = require('ibm-watson/speech-to-text/v1');
const AuthorizationV1 = require('ibm-watson/authorization/v1');
const IamTokenManagerV1 = require('ibm-watson/iam-token-manager/v1');

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

// Create the token manager
let tokenManager;
let instanceType;
const serviceUrl = process.env.SPEECH_TO_TEXT_URL || 'https://stream.watsonplatform.net/speech-to-text/api';

if (process.env.SPEECH_TO_TEXT_IAM_APIKEY && process.env.SPEECH_TO_TEXT_IAM_APIKEY !== '') {
  instanceType = 'iam';
  tokenManager = new IamTokenManagerV1({
    iamApikey: process.env.SPEECH_TO_TEXT_IAM_APIKEY || '<iam_apikey>',
    iamUrl: process.env.SPEECH_TO_TEXT_IAM_URL || 'https://iam.bluemix.net/identity/token',
  });
} else {
  instanceType = 'cf';
  const speechService = new SpeechToTextV1({
    username: process.env.SPEECH_TO_TEXT_USERNAME || '<username>',
    password: process.env.SPEECH_TO_TEXT_PASSWORD || '<password>',
    url: serviceUrl,
  });
  tokenManager = new AuthorizationV1(speechService.getServiceCredentials());
}

app.get('/', (req, res) => res.render('index'));

// Get credentials using your credentials
app.get('/api/v1/credentials', (req, res, next) => {
  tokenManager.getToken((err, token) => {
    if (err) {
      next(err);
    } else {
      let credentials;
      if (instanceType === 'iam') {
        credentials = {
          accessToken: token,
          serviceUrl,
        };
      } else {
        credentials = {
          token: token.token,
          serviceUrl,
        };
      }
      res.json(credentials);
    }
  });
});

module.exports = app;