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Using webhooks in UP42

Introduction

This repository contains code for using webhooks with UP42.

It is divided in two parts:

  1. Low code version with Python snippets to be used together with pipedream.
  2. Server side version using an OpenResty based minimal setup that relies on pipedream for request validation and forward the webhook to OpenResty. Using ngrok to create a tunnel. In our OpenResty instance we use embebbed Lua to keep a record of the received webhooks.

Requirements

To be able to run the server side version of the code you need:

  1. docker.
  2. GNU make.
  3. Jupyter.
  4. cURL.
  5. jq.

Pipedream snippets

The pipedream snippets are in the snippets directory. And the filenames are self explanatory:

  • pipedream_up42_webhook_job_status_handler.py: incoming HTTP validation and job status filtering.

  • pipedream_up42_webhook_order_status_handler.py: incoming HTTP validation and order status filtering.

  • validate_webhook.py: incoming HTTP validation for both job and order status filtering.

  • httpx_client_ngrok.py: forward the webhook to our local OpenResty instance.

OpenResty configuration and Lua module

The openresty directory contains:

  • default.conf: server configuration.

  • lua: directory containing the up42webhooks.lua module that implements a webhook record collection system. I.e., all webhook requests forwarded by pipedream get collected in a in-memory key-value store, that persists across requests and OpenResty reloads, so that we can consult them at our leisure.

Jupyter notebook

In the notebook directory there is a Python Jupyter notebook that makes use of the SDK webhooks implementation.

  • sdk_webhooks_testing.ipynb.

Makefile

The server side setup runs from a Makefile. The configuration for the Makefile is in config.mk.

The Makefile has the following targets:

  • run: run OpenResty from a dockerhub image using port 9888.
  • list: list the containers using port 9888.
  • test: test the nginx/OpenResty configuration (do nginx -t on the running container).
  • reload: reload the OpenResty configuration.
  • restart: restart OpenResty. N.B.: It clears the shared memory zone.
  • stop: stop OpenResty.
  • logs: show the OpenResty logs.

Using this code

For a detailed description of the usage of this code please refer to the UP42 blog posts.

License

MIT License

Copyright (c) 2022 UP42 GmbH

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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