We are currently in the process of updating this sample template. If you are encountering any issues with the sample, please open an issue at github.com/twilio-labs/code-exchange/issues and we'll try to help you.

This application should give you a ready-made starting point for writing your own voice apps with Twilio Client. Before we begin, we need to collect all the config values we need to run the application:

This application uses the lightweight Flask Framework.

Begin by creating a configuration file for your application:

cp .env.example .env

Edit .env with the four configuration parameters we gathered from above. Export the configuration in this file as system environment variables like so on Unix based systems:

source .env

Begin by creating a configuration file for your application:

cp .env.example.ps1 .env.ps1

Edit .env.ps1 with the four configuration parameters we gathered from above. "Dot-source" the file in PowerShell like so:

. .\.env.ps1

This assumes you will run the application in the same PowerShell session. If not, edit the .env.ps1 and uncomment the [Environment]::SetEnvironmentVariable calls. After re-running the script, the environment variables will be peramently set for your user account.

Next, we need to install our depenedencies:

pip install -r requirements.txt

Run the application using the python command.

python app.py

Your application should now be running at http://localhost:5000.

There's just a few more steps to get Twilio's voice infrastructure talking to your server.

1. Download and install ngrok

Learn 6 awesome reasons why to use ngrok.

2. Run ngrok:

   ngrok http 5000

3. When ngrok starts up, it will assign a unique URL to your tunnel. It might be something like https://asdf456.ngrok.io. Take note of this.

4. Configure your TwiML app's Voice "REQUEST URL" to be your ngrok URL plus /voice. For example:

   

Note: You must set your webhook urls to the https ngrok tunnel created.

You should now be ready to rock! Make some phone calls. Open it on another device and call yourself. Note that Twilio Client requires WebRTC enabled browsers, so Edge and Internet Explorer will not work for testing. We'd recommend Google Chrome or Mozilla Firefox instead.

MIT