[Golang][FB] 教學如何快速透過 Golang 與 Heroku 架設一個臉書機器人

1. Just Deploy the same on Heroku

Remember your heroku ID and app address. ex: https://APP_ADDRESS.herokuapp.com/

2. Create a Facebook Page

Make sure you already have Facebook account, if you need use FB Bot.

3. Go to Facebook Developer to create App

Create App, need select as follow:

• New App type [Web App], create app
• Add new product [Messenger]

4. Configuration Messenger Bot

Get token from Faccebook page.

• Select a “Page” you own.
• Go to “Meseenger” product.
• It will generate token
• copy it and store it.

5. Paste Token to Heroku

Go to heroku dashboard, go to “Setting” -> “Config Variables”.

• Add “Config Vars”
• Name -> “TOKEN”
• Value use token facebook app.

6. Back Facebook App configuration

• Go to “Messenger” product
• Go to “Setup Webhooks”
• Fill https://APP_ADDRESS.herokuapp.com/webhook in callback URL.
• Fill your token in “token”.
• Checked the checkbox “message_deliveres”, “messages”.

If your configuration is correct, it will show “completed”.

Also remember to choose correct page in this setting.

7. Request basic permissions

In Messenger application review, press “Request Premission”.

• Checked the “pages_messaging”.

How to testing it.

• Go to your spcific “page” in Facebook.
• Press “Send Message”

How to modification your Bot Code

• Download code from Heroku git clone https://git.heroku.com/APP_ADDRESS.git
• Modify code on main.go first. especially in MessageReceived().
• Commit and push it back to heroku git push heroku master.