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Update ActivityPub resources

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Shadowfacts 2023-03-07 20:57:10 -05:00
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site/posts/2019-09-22-activity-pub-resources.md
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@ -10,7 +10,7 @@ slug = "activity-pub-resources"
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 Oct 10, 2019.
This post was last updated on Mar 7, 2023.
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@ -19,7 +19,7 @@ This post was last updated on Oct 10, 2019.
- 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.
- 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 object 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.
@ -34,6 +34,10 @@ This post was last updated on Oct 10, 2019.
- 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.
### Libraries
- [activitystreams](https://lib.rs/crates/activitystreams) for serializing/deserializing AS2 types in Rust
- [http-signature-normalization](https://lib.rs/crates/http-signature-normalization) for dealing with part of HTTP signatures in Rust
### Other
- For actually testing federation, [ngrok](https://ngrok.com/) is very useful for testing your implementations against others. It creates a tunnel from your local machine to a public domain with HTTPS already setup. Because your code is still running locally, you have access to all your usual debugging tools and can iterate rapidly.
- Testing against other implementations running locally (be it on your machine or inside a VM/container) lets you access debug logs and see what the other server is actually receiving, which can be quite useful.