Node Webhook Consumer with Serverless

Example code to demonstrate how to setup a simple HTTP POST endpoint to consume webhook data.

Based on: https://github.com/serverless/examples/tree/master/aws-node-simple-http-endpoint from serverless.

Read more about this on the "Inside the Embassy" Blog:

https://inside.getambassador.com/serverless-creating-a-webhook-consumer-in-5-minutes-4136adab06b0

Use Cases

Consuming webhook data from a third-party API or service

Invoke the function locally

serverless invoke local --function webhookConsumer

Which should result in:

Serverless: Your function ran successfully.

{
    "statusCode": 200
}

Deploy

In order to deploy the you endpoint simply run

serverless deploy

The expected result should be similar to:

Serverless: Packaging service...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading service .zip file to S3 (1.9 KB)...
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
..............
Serverless: Stack update finished...
Service Information
service: test-webhook-endpoint
stage: dev
region: us-east-1
api keys:
  None
endpoints:
  POST - https://XXXXXXX.execute-api.us-east-1.amazonaws.com/dev/webhook
functions:
  webhookConsumer: test-webhook-endpoint-dev-webhookConsumer

Usage

You can now invoke the Lambda directly and even see the resulting log via

serverless invoke --function webhookConsumer --log

or as send an HTTP request directly to the endpoint using a tool like curl

curl https://XXXXXXX.execute-api.us-east-1.amazonaws.com/dev/ping

Scaling