⚓ webhook-service

Notify integration partners about events

Tech Stack

• Node.js + Typescript
• MongoDB
• RabbitMq
• Docker

How to use

Start everything up:

$ make up

Subscribe to an event:

Send a POST request to http://localhost:8080/subscriptions with a payload like this:

{
  "event": "order",
  "partner": 1,
  "address": "http://web:8080/test"
}

Send an event:

You can open up the RabbitMQ Management Console (username and password is guest) and publish messages into the events queue, for example:

{
  "type": "order",
  "partner": 1,
  "data": { "foo": "bar" }
}

Still has much room for improvement, for example

• E2E testing, especially the business logic inside the workers

• unit testing of modules

• handle constantly failing webhooks with exponential backoff and/or retry limit and eventually disable them (a good read)

• validate payload on /subscriptions endpoint

• authentication & authorization

• start workers after rabbitmq is properly up (use wait-for-it.sh instead the current restart: on-failure)

lots of ideas came from these sources:

• https://glaforge.appspot.com/article/implementing-webhooks-not-as-trivial-as-it-may-seem

• https://shopify.dev/docs/admin-api/rest/reference/events/webhook