Category Archives: facebook

Messenger2Watson(1): Connect Facebook to a Watson Chatbot

In Slack2Watson(1) and (2) I created a chatbot and integrated it into Slack Slash Commands. Now, let’s integrate the same chatbot into Facebook Messenger. To accomplish this I need to create a Facebook Application, add the Messenger Platform to my Facebook Application, create a Webhook, have admin access to a Facebook Page to generate a Page Access Token so I can send and receive messages send to the Facebook Page, and create the Node-RED flows to integrate the Facebook Messenger with the IBM Watson Conversation.

Steps:

  1. Create a Flow to Verify the Request for Webhook Edits in Node-RED,
  2. Create an Endpoint for the Redirect URL of the Webhook in Node-RED,
  3. Create a Facebook Application for the Messenger Platform,
  4. Enable Webhooks Integration with Node-RED,

Create a Flow to Verify the Request for Webhook Edits in Node-RED

To prepare the setup and configuration of the Facebook Application, the Messenger platform and Webhooks to enable a chatbot in Facebook Messenger, I will first create the Node-RED flows to implement the required server workflow.

The first flow is to verify the endpoint for the setup of the Facebook Application, using the ‘hub.challenge’ token.

  • Go to your Node-RED application on Bluemix at http://<username>-nodered-slackapp.mybluemix.net/,
  • Click the ‘Go to your Node-RED flow editor’ button,
  • If you’re not logged in yet, log in now,
  • Add a new flow tab and rename the flow ‘Facebook Messenger’,
  • To verify your endpoint during setup of your Webhook, or when you update an existing topic subscription of your Webhook, Facebook sends a GET request. The request will include:
    hub.mode=subscribe
    hub.challenge — a random string
    hub.verify_toke
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