Facebook Messenger Echo Bot

Facebook Launched Messenger API in F8 Conference. This opens up gate for many who want to build bots for Facebook Messenger.

This is a simple echo bot built using the APIs.

Setup

• Setup a Nodejs client running on HTTPS. Refer to awesome Digital Ocean resource for same here
• Facebook does not play nice with self signed certificates. Buy one from a provider else you can generate one for free from LetsEncrypt. Refer to this guide for same.
• Follow steps mentioned at Facebook Messenger API docs to create an app and a page required.
• Generate page access token
• Use token generated in previous step to make a cURL call and subscribe app to page.
• Fill relevant details in conf.js file.
• Start node server and complete the Webhook setup process.
• You are ready to go, bot should respond back with exact string sent.