Add ActivityPub Resources blog post

site/posts/2019-09-22-activitypub-resources.md

@@ -0,0 +1,34 @@
+```
+metadata.title = "ActivityPub Resources"
+metadata.category = "activitypub"
+metadata.date = "2019-09-22 17:50:42 -0400"
+metadata.shortDesc = "A compilation of resources I found useful in learning/implementing ActivityPub."
+```
+
+This isn't really going to be a blog most, but more of a collection of tidbits and resources I found helpful in implenting the [ActivityPub integration](/meta/2019/reincarnation/#activity-pub) for the new version of my blog.
+
+This post was last updated on Sep 22, 2019.
+
+<!-- excerpt-end -->
+
+### Specs
+- The [ActivityStreams 2.0 spec](https://www.w3.org/TR/activitystreams-core/) is important, as it's what ActivityPub is built on top of.
+- Similarly, the [AS 2.0 Vocabulary](https://www.w3.org/TR/activitystreams-vocabulary/) defines all the objects and activities that AP actually uses in practice (and many more that it doesn't).
+- The [ActivityPub spec](https://www.w3.org/TR/activitypub/) itself is quite useful, despite its many omissions.
+- There's also [LitePub](https://litepub.social/litepub/), which has some extensions to AP.
+- The least useful by far spec is [JSON-LD](https://www.w3.org/TR/json-ld/) which defines how to use JSON to represent linked data and objects graphs. AS2 and AP are both built on this, but if you're going for a simple implementation (or even a complex one), you can entirely ignore this and treat JSON-LD as plain old JSON objects.
+
+[This](https://tinysubversions.com/notes/reading-activitypub/) is also a helpful resource about how to go about reading the AP specification.
+
+### Actually Federating
+- Gargron's blog posts on [implementing a basic AP server](https://blog.joinmastodon.org/2018/06/how-to-implement-a-basic-activitypub-server/) and [implementing HTTP signatures](https://blog.joinmastodon.org/2018/07/how-to-make-friends-and-verify-requests/) are good guides for how to actually get federating with other servers in the wild.
+- [Lain's blog post](https://blog.soykaf.com/post/activity-pub-in-pleroma/) on some of the weird quirks of how ActivityPub actually gets used.
+- [Kaniini's blog post](https://blog.dereferenced.org/federation-what-flows-where-and-why) about how data actually moves through the fediverse.
+
+### Reference Material
+- I used the [Pleroma source code](https://git.pleroma.social/pleroma/pleroma/) a great deal when working on my implementation, mainly just because I'm familiar with Elixir.
+- I'd also like to think [my own implementation](https://git.shadowfacts.net/shadowfacts/shadowfacts.net/src/branch/master/lib/activitypub) is fairly approachable (it's about 700 lines of not-too-complicated TypeScript).
+- Ted Unangst has a collection of [sample data](https://jawn.tedunangst.com/a/R526ZQ49MbYt5J4KpR) which is useful for comparing how different implementations represent things in AP.
+
+### Other
+- Ted Unangst also has his own [compilation of AP-related links](https://flak.tedunangst.com/post/ActivityPub-as-it-has-been-understood).