This repository contains a Node.js application that acts as a proxy between a Chat Widget and the Voiceflow Dialog Manager (DM) API. The primary purpose of this proxy is to intercept requests sent from the Chat Widget to the Voiceflow DM API's /interact endpoint, allowing for the collection, parsing, and analysis of response traces for analytics purposes.

• Request Interception: Captures all requests sent by the Chat Widget to the Voiceflow DM API.
• Response Parsing: Analyzes the traces from the responses to extract valuable analytics data.

Before setting up the project, ensure you have the following installed on your system:

• Node.js (v18.x or higher recommended)
• npm (usually comes with Node.js)

Clone this repository to your local machine using Git:

git clone https://github.com/voiceflow-gallagan/vf-analytics-proxy.git

Navigate into the project directory:

cd vf-analytics-proxy

Rename the .env.template file to .env. Open the .env file and update the values as necessary.

The default configuration to use the proxy with the CHat Widget is as follows:

VOICEFLOW_RUNTIME_URL = 'https://general-runtime.voiceflow.com' # Default for public runtime
PORT = 3000 # Port to run the server on

To use the proxy with our DM API, update the values as follows:

VOICEFLOW_RUNTIME_URL = 'https://general-runtime.voiceflow.com' # Default for public runtime
VOICEFLOW_API_KEY = 'your-vf-api-key'
MODE = 'API'
PORT = 3000 # Port to run the server on

Install the necessary Node.js dependencies using npm:

npm install

Run the following command to start the proxy server:

npm start

If running locally and you wish to expose the server to the internet, you can use ngrok to create a forwarding URL.

For example, if the server is running on port 3000:

ngrok http 3000

Update the url value in your Chat Widget snippet code to use the URL of the instance where the proxy is running or the ngrok forwarding URL.

Here is an example snippet:

(function(d, t) {
  var v = d.createElement(t), s = d.getElementsByTagName(t)[0];
  v.onload = function() {
    window.voiceflow.chat.load({
      verify: { projectID: 'your-vf-roject-id' },
      url: 'https://your-proxy-url',
      versionID: 'development' // Use 'production' for production environments
    });
  }
  v.src = "https://cdn.voiceflow.com/widget/bundle.mjs"; v.type = "text/javascript"; s.parentNode.insertBefore(v, s);
})(document, 'script');

Replace your-vf-project-id with your project id and https://your-proxy-url with the actual URL of your proxy server instance.

Update the url value in your Chat Widget snippet code to use the URL of the instance where the proxy is running or the ngrok forwarding URL.

Here is an example of a request to the proxy when using the DM API:

  --url https://154d-90-26-55-172.ngrok-free.app/state/user/test/interact \
  --header 'Authorization: VF.DM.XXX' \
  --header 'Content-Type: application/json' \
  --header 'userid: test' \
  --header 'versionid: development' \
  --data '{
	"action": {"type": "text", "payload": "how tall is the eiffel tower?"}
}'

Replace the url with your endpoint URL, VF.DM.XXX with your Voiceflow API key, set versionid to your project version ('development', 'production') and pass the userid you want.