Enable "Webhook GET-style" publishing via POST requests (with Jsonpath support)

[Fabian-G]

💡 Idea
I'm thinking of using webhooks on webex (https://developer.webex.com/docs/api/v1/webhooks/create-a-webhook) to send push messages via ntfy to my phone when there are new messages, which works fine. However, the request send by webex looks something like this (some information stripped):

POST https://ntfy.sh/webex

{
  "id": "<id>",
  "name": "Messages",
  "targetUrl": "ntfy.sh/webex",
  "resource": "messages",
  "event": "created",
  "orgId": "<id>",
  "createdBy": "<id>",
  "appId": "<id>",
  "ownedBy": "creator",
  "status": "active",
  "created": "2023-05-28T19:22:14.720Z",
  "actorId": "<id>",
  "data": {
    "id": "<id>",
    "roomId": "<id>",
    "roomType": "group",
    "personId": "<id>",
    "personEmail": "<email>",
    "created": "2023-05-28T19:22:58.361Z"
  }
}

Therefore (as expected) the notification message is the json body, which doesn't look nice. Since the only real option to modify that request that webex offers is the targetUrl, I thought it would be nice to have the same options mentioned here, but for POST requests and therefore just ignore the body when the ?message="..." parameter is present.

What would be even nicer, is an option to use string interpolation on the parameters, reading values from the body via jsonpath.
For example: If I were to configure the targetUrl in webex as

https://ntfy.sh/webex?message="New message from {{$.data.personEmail}}"

Ntfy would parse the json body and set the message of the notification to "New message from <email>".

💻 Target components

• ntfy server

[wunter8]

There has been discussion about custom mappings of JSON fields to ntfy's notification fields (e.g., message, title, etc.)

Nothing has been implemented yet, but you can see some of the discussion here: #724

[binwiederhier]

This is indeed a dup. I do like this templating approach too. I actually did implement this a year ago I think: #171 + #104

Closing as a dup in favor of #724