> A minimalistic jamstack-augmented microservice for webmentions etc
**Are you looking for a way to DO something with this?** See https://github.com/wgroeneveld/jam-my-stack !
This is a set of minimalistic [Koa-based](https://koajs.com/) microservices that aid you in your IndieWeb Jamstack coolness 😎 (name-dropping). While [jam-my-stack](https://github.com/wgroeneveld/jam-my-stack) is a set of scripts used to run at checkin-time, this is a dymamic service that handles requests.
Inspect how it's used on https://brainbaking.com/ - usually, a `<link/>` in your `<head/>` suffices:
If you want to support the older pingback protocol, you can leverage webmenton.io's forward capabilities. Although I developed this primarily because webmention.io is _not_ reliable - you've been warned.
## What's in it?
### 1. Webmentions
#### 1.1 `POST /webmention`
Post a webmention. Includes a _lot_ of cross-checking and validating to guard against possible spam. See the [W3C WebMention spec](https://www.w3.org/TR/webmention/#sender-notifies-receiver) - or the source - for details.
Accepted form format:
```
POST /webmention-endpoint HTTP/1.1
Host: aaronpk.example
Content-Type: application/x-www-form-urlencoded
source=https://waterpigs.example/post-by-barnaby&
target=https://aaronpk.example/post-by-aaron
```
Will result in a `202 Accepted` - it handles things async. Stores in `.json` files in `data/domain`.
#### 1.2 `GET /webmention/:domain/:token`
Retrieves a JSON array with relevant webmentions stored for that domain. The token should match. See `config.js` to fiddle with it yourself. Environment variables are supported, although I haven't used them yet.
Sends out webmentions, based on the domain's `index.xml` RSS feed, and optionally, a `since` request query parameter that is supposed to be a string, fed through [Dayjs](https://day.js.org/) to format. (e.g. `2021-03-16T16:00:00.000Z`).
This does a couple of things:
1. Fetch RSS entries (since x, or everything)
2. Find outbound `href`s (starting with `http`)
3. Check if those domains have a `webmention` link endpoint installed, according to the w3.org rules.
4. If so: `POST` for each found href with `source` the own domain and `target` the outbound link found in the RSS feed.
As with the `POST` call, will result in a `202 Accepted` and handles things async/in parallel.
- Implement a Brid.gy-like system that converts links from domains in the config found on [public Mastodon timelines](https://docs.joinmastodon.org/methods/timelines/) into webmentions. (And check if it's ok to only use the public line)
