Webhooks

Execute arbitrary operating system commands (called "actions") in a sandbox when webhook calls are received.

Usage

Start the server:

supervisor -n error webhooks.js

The server automatically adjusts itself if you change the webhooks-config.json file - no restart needed.

Try It!

Visit the URL of your webhook server to see a web page that lets you experiment.

To make an action that responds to a webhook:

1. Edit webhooks-config.json
2. In the actions section add this line:

"/mycommand": "echo this is my command!"

You do NOT need to restart the server - it watches the config file automatically.

3. Visit http://yourserver:7788/mycommand.
4. Watch the console. It worked!

Attaching Actions

The file webhooks-config.json lets you set up commands to run when webhooks are received.

webhooks-config.json

{
  actions: {
    "/helloworld": "echo hello world",
    "/badcommand": "commandDoesNotExist",
    "/getResult": {
      command: "echo This is a returned result. My uid is $webhook_uid",
      respond: true
    }
}

Responses

By default, webhooks.js responds with code 200 and "OK" in the response body.

Setting respond: true makes the HTTP response wait until the command's process is complete, and then causes it to pass back:

{
  "uid": 132,
  "stdout": "this is my stdout\n",
  "stderr": "any errors show here",
  "exitCode": 0
}

Environment Variables

The following environment variables will be available to any command you run:

webhook_url       the localhost:port webhooks is using
webhook_uid       the unique id of this webhook call
webhook_path      the path of the webhook
webhook_command   the command being run
webhook_headers   the headers of the incoming webhook
webhook_query     the query section of a 'get' webhook
webhook_body      the body section of a 'post' webhook
webhook_{key}     each key in a 'get' webhook will be assigned

Installation

git clone https://github.com/appsoma/webhooks.git
cd webhooks
npm install

Subscribe to Live Webhook Feed

You can see all webhooks happen in real time by connecting to the server with a websocket client. Here is a working example: index.html