# DEPRECATED

This code pattern is no longer supported. You can find the newly supported Text to Speech Code Pattern here.

Text to Speech Code Pattern 📜

Sample React app for playing around with the Watson Text to Speech service.

✨ Demo: https://text-to-speech-code-pattern.ng.bluemix.net/ ✨

Flow

1. User supplies some text as input to the application (running locally, in the IBM Cloud or in IBM Cloud Pak for Data).
2. The application sends the text to the Watson Text to Speech service.
3. As the data is processed, the Text to Speech service returns audio information to the HTML5 audio element for playback.

Prerequisites

1. Sign up for an IBM Cloud account.
2. Download the IBM Cloud CLI.
3. Create an instance of the Text to Speech service and get your credentials:
   • Go to the Text to Speech page in the IBM Cloud Catalog.
   • Log in to your IBM Cloud account.
   • Click Create.
   • Click Show to view the service credentials.
   • Copy the apikey value.
   • Copy the url value.

Cloud Pak for Data

To use this code pattern with a Text to Speech instance provisioned on Cloud Pak for Data, you can use your CPD username and password credentials or an access_token to authenticate your requests. You also need the service url as described here.

Another important thing to note is that this code pattern assumes that you're using a valid SSL certificate for your CPD cluster. If not, you'll receive transcription errors. If you'd still like to use the app with an invalid certificate, you'll need to look up your browser-specific way to ignore these certificate errors. Do note that this is very insecure though!

Configuring the application

Depending on where your service instance is you may have different ways to download the credentials file.

Need more information? See the authentication wiki.

Automatically

Copy the credential file to the application folder.

Cloud Pak for Data

Public Cloud

Manually

1. In the application folder, copy the .env.example file and create a file called .env:

   cp .env.example .env
   

2. Open the .env file and add the service credentials depending on your environment.

   Example .env file that configures the apikey and url for a Speech to Text service instance hosted in the US South region:

   TEXT_TO_SPEECH_APIKEY=12345abcde
   TEXT_TO_SPEECH_URL=https://stream.watsonplatform.net/text-to-speech/api
   

   • CPD using username and password: If your service instance is running in Cloud Pak for Data and you want to use username and password credentials, add the following variables to the .env file.

     TEXT_TO_SPEECH_USERNAME=admin
     TEXT_TO_SPEECH_PASSWORD=password
     TEXT_TO_SPEECH_URL=https://{cpd-url}:{cpd-port}/text-to-speech/api
     

   • CPD using access token: If your service instance is running in Cloud Pak for Data and you want to use the access_token from the service instance detail page, add the following:

     TEXT_TO_SPEECH_BEARER_TOKEN=eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.ey...
     TEXT_TO_SPEECH_URL=https://{cpd-url}:{cpd-port}/text-to-speech/api
     

Running locally

1. Install the dependencies

   npm install
   

2. Build the application

   npm run build
   

3. Run the application

   npm run dev
   

4. View the application in a browser at localhost:3000

Deploying to IBM Cloud as a Cloud Foundry Application

Click on the button below to deploy this demo to the IBM Cloud.

1. Build the application

   npm run build
   

2. Login to IBM Cloud with the IBM Cloud CLI

   ibmcloud login
   

3. Target a Cloud Foundry organization and space.

   ibmcloud target --cf
   

4. Edit the manifest.yml file. Change the name field to something unique. For example: - name: my-app-name.

5. Deploy the application

   ibmcloud app push
   

6. View the application online at the app URL, for example: https://my-app-name.mybluemix.net

Tests

Unit tests

Run unit tests with:

npm run test:components

See the output for more info.

Integration tests

First you have to make sure your code is built:

npm run build

Then run integration tests with:

npm run test:integration

Directory structure

.
├── app.js                      // Express routes
├── config                      // Express configuration
│   ├── error-handler.js
│   ├── express.js
│   └── security.js
├── package.json
├── public                      // Static resources
├── server.js                   // Entry point
├── test                        // Tests
└── src                         // React client
    └── index.js                // App entry point

License

This sample code is licensed under the MIT License.

Open Source @ IBM

Find more open source projects on the IBM Github Page