Add function (?) to check X-Hub-Signature

[tosh]

Messenger Apps in production should check the integrity of incoming requests.
Not sure what is the best way to get this in though. Compojure middleware?

https://developers.facebook.com/docs/messenger-platform/webhook-reference#security

See example implementation for javascript/node:

https://github.com/fbsamples/messenger-platform-samples/blob/724abbde42a63dedac65f67bf7a828cfcd1a8ca6/node/app.js#L145-L173

[davidmann4]

you can test if it is working using my MSF module

https://github.com/davidmann4/msf-fb-messenger-bot-dos

https://chatbotsmagazine.com/how-to-kill-a-bot-with-10-http-requests-ca7eb57c2ad1