Sockethook is a Webhook-to-WebSocket proxy written in Go. It's designed for building real-time applications around third-party APIs which provide Webhooks. Sockethook could for example be used to create a live feed of Github deployments or a real-time view of Shopify orders.

Sockethook is written in Go and can be installed by running

$ go get github.com/fabianlindfors/sockethook

The tool is started with

$ sockethook
INFO[0000] Sockethook is ready and listening at port 1234 ✅

Sockethook is now ready to start receiving Webhooks! WebSockets can be connected through /socket followed by the endpoint to which you want to subscribe, for example: /socket/order/created. Any Webhook requests sent to /hook/order/created will now be broadcast to all subscribers listening to the specific endpoint.

The broadcasted message will be JSON encoded and contain information about the Webhook request. The following is an example message from a Shopify Webhook:

{
  "headers": {
    "Accept": "*\/*",
    "Accept-Encoding": "gzip;q=1.0,deflate;q=0.6,identity;q=0.3",
    "Connection": "close",
    "Content-Length": "4264",
    "Content-Type": "application\/json",
    "User-Agent": "Ruby",
    "X-Forwarded-For": "35.231.14.37",
    "X-Forwarded-Proto": "https",
    "X-Shopify-Hmac-Sha256": "wa5ZVAJPjbtr4Oj8xVnt\/jLWwfD9JdGFcdrjY4VgORQ=",
    "X-Shopify-Order-Id": "820982911946154508",
    "X-Shopify-Shop-Domain": "fabianlindfors.myshopify.com",
    "X-Shopify-Test": "true",
    "X-Shopify-Topic": "orders\/create"
  },
  "endpoint": "\/order\/created",
  "data": {
    "app_id": null,
    "billing_address": {
      "address1": "123 Billing Street",
      "address2": null,
      "city": "Billtown",
      "company": "My Company",
      "country": "United States",
      "country_code": "US",
      "first_name": "Bob",
      "last_name": "Biller",
      "latitude": null,
      "longitude": null,
      "name": "Bob Biller",
      "phone": "555-555-BILL",
      "province": "Kentucky",
      "province_code": "KY",
      "zip": "K2P0B0"
    }
    ...
  }
}

If the request content type is JSON then the data field will contain the JSON body. Otherwise data will be a string of the body.

Two possible options can be passed to Sockethook, --port and --address. --port specifies which port at which to listen (default is 1234) and --address sets a specific address to bind to.

$ sockethook --port 8000
$ sockethook --address 127.0.0.1

Sockethook doesn't include any authentication meaning all endpoints and sockets are publicly available by default. The recommended way to add authentication is to use a reverse proxy or similar, which lends a lot of flexibility. Examples include nginx, Caddy, and Traefik.

Sockethook is licensed under MIT.