Prevent the Chatbot to Send the same message multiple time

[elinguiuriel]

Describe the bug

In some occasion, the Chatbot send the same message multiple time
Someone have a solution for this misbehavior, cause unknown, maybe :

• Heroku
• the synchronous nature of the app, explore this Making the Flask App Asynchronous #35
• ...

To Reproduce

it happen random when heroku is asleep (try here : https://m.me/OpenSourceChatbot

Expected behavior

The same message should not be send multiple time

Screenshots

[aboullaite]

My thinking about this one is when heroku receives no request, it switch to idle mode! Now when the first user sends the request, it takes to time to warm up the app, and the the messenger api sends multiple hooks to heroku, which answers afterwards 😅

[merrcury]

Heroku's Pricing model for Hobby project keeps web app in off state if It did not receive a request for too long. So, When you make a request, It basically takes time to get the app-server started and It's quite slow. So, I recommend you to use Azure, Its app service model is free and won't go to sleep like Heroku.

[Awinja-j]

Thanks for the recommendation @merrcury