thepraandClaude Opus 5.5
aa7e43a61e
peers/lemmy.sh runs the Lemmy 1.0.0-beta.2 backend on the shared Postgres. It trusts
Caddy's CA through SSL_CERT_FILE and reaches the pasture through
DANGER_FEDERATION_ALLOW_LOCAL_IP. Lemmy 0.19 cannot join: its rustls trusts only its
bundled roots. LEMMY_LOG sets RUST_LOG.
scenarios/lemmy.sh drives Lemmy through its v4 API. 20 checks pass, three runs in a row:
- communities both ways;
- a titled thread each way, and alice's mention of a Lemmy community becoming a thread
there;
- the Lemmy community's announce reaching alice's home;
- comments both ways and alice's like as an upvote;
- private messages both ways;
- statistics.
Two expected failures: votes, which Lemmy sends only through the community as
Announce{Like|Dislike}, and a moderator's removal. Both belong to P7.
What it showed, in docs/INTEROP.md:
- Lemmy 1.0 keeps its user's thread in a remote community pending until the community
announces it back. It clears the flag before answering that echo 400 ("Object is not
remote"). Leaving the author's server out of the Announce, as tried here, left every
such thread pending, so GroupDistributor now says why the echo stays.
- Every bare Announce{object} is answered 400, as Lemmy answers its own compatibility
Announce(Page).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ELjqpznMFMNrJoJUj6K5p2
51 lines
1.8 KiB
C#
51 lines
1.8 KiB
C#
using PrivaPub.Federation.Actors;
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using PrivaPub.Federation.Rendering;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.Json.Nodes;
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namespace PrivaPub.Federation.Outbox
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{
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public interface IGroupDistributor
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{
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Task Announce(LocalActor group, JsonObject activity, string objectUri, bool isNewPost, CancellationToken token);
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}
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public class GroupDistributor : IGroupDistributor
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{
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readonly IDeliveryService _delivery;
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public GroupDistributor(IDeliveryService delivery)
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{
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_delivery = delivery;
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}
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public async Task Announce(LocalActor group, JsonObject activity, string objectUri, bool isNewPost, CancellationToken token)
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{
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if (group is not { IsCircle: false, Kind: Models.Federation.LocalActorKind.Group })
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return;
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var embedded = (JsonObject)activity.DeepClone();
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embedded.Remove("@context");
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embedded["audience"] ??= group.Uri;
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var key = Convert.ToHexStringLower(SHA256.HashData(Encoding.UTF8.GetBytes(activity["id"]?.GetValue<string>() ?? embedded.ToJsonString())))[..24];
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var announce = new JsonObject
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{
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["@context"] = ActivityPubRenderer.Context(),
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["id"] = group.ActivityUri($"announce-{key}"),
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["type"] = "Announce",
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["actor"] = group.Uri,
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["to"] = new JsonArray(ActivityPubRenderer.Public),
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["cc"] = new JsonArray(group.Followers),
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["audience"] = group.Uri,
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["object"] = embedded
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};
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// Every follower, the author's own server included: Lemmy 1.0 keeps its user's post pending until the community
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// announces it back, and clears that before it answers the echo 400 ("Object is not remote").
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await _delivery.EnqueueToFollowers(group, announce, token);
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if (isNewPost && !string.IsNullOrEmpty(objectUri))
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await _delivery.EnqueueToFollowers(group, ActivityPubRenderer.Announce(group, objectUri, $"announce-object-{key}"), token);
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}
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}
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}
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