ExFacebookMessenger is a library that helps you create facebook messenger bots easily.
def deps do
[{:facebook_messenger, "~> 0.3.0"}]
end
To create an echo back bot, do the following:
In your Plug.Router
define a forward
with a route to FacebookMessenger.Router
defmodule Sample.Router do
use Plug.Router
...
forward "/messenger/webhook",
to: FacebookMessenger.Router,
message_received: &Sample.Router.message/1
def message(msg) do
text = FacebookMessenger.Response.message_texts(msg) |> hd
sender = FacebookMessenger.Response.message_senders(msg) |> hd
FacebookMessenger.Sender.send(sender, text)
end
enda
This defines a webhook endpoint at:
http://your-app-url/messenger/webhook
Go to your config/config.exs
and add the required configurations
config :facebook_messenger,
facebook_page_token: "Your facebook page token",
challenge_verification_token: "the challenge verify token"
To get the facebook_page_token
and challenge_verification_token
follow the instructions here
For the webhook endpoint use http://your-app-url/messenger/webhook
If you use phoenix framework in your project, then you need the phoenix version of facebook_messenger
this can be found at phoenix_facebook_messenger
found here.
- A sample facebook echo bot with plug can be found here. https://github.com/oarrabi/plug_facebook_echo_bot
- For the phoenix echo bot, https://github.com/oarrabi/phoenix_facebook_echo_bot
- Handle other types of facebook messages
- Support sending facebook structure messages
- Handle facebook postback messages