Files
SocialPub/PrivaPub/Federation/Controllers/WellKnownController.cs
T
thepraandClaude Opus 5.5 2eb2a63f1e Conversations are keyed by who is in them, and circles stay home
S8: a direct message joins a conversation only when its participants are
exactly that conversation's members, found through a new
DmGroup.ParticipantsKey (a hash of the sorted members). A remote context
no longer decides anything: it let anyone who knew a conversation's
context post into it, and joining by context while dropping a participant
would have shown a reply to someone it was not addressed to. A context is
kept only when it is on the author's origin. Sending a DM to the same
people again reuses their conversation instead of opening a new one.

S9: Group.Kind is Circle or Community. A circle is not a federated actor:
its actor, collections, WebFinger and inbox answer 404, a remote Follow is
refused, and posts in it are IsLocalOnly - never delivered, never in an
outbox, never served. Communities keep today's behaviour until P4.
Migration _003 makes every existing group a circle, marks their posts
local-only and backfills the conversation keys.

End-to-end inbox tests sign real deliveries from a fake peer: a context
injection, a forged activity id, a note attributed to someone else, a
cross-origin object, a bad signature, junk bodies and a Follow of a circle.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
2026-10-01 10:57:01 +02:00

97 lines
3.1 KiB
C#

using Microsoft.AspNetCore.Mvc;
using MongoDB.Entities;
using PrivaPub.Models.Federation;
using PrivaPub.Models.User;
using PrivaPub.StaticServices;
using System.Text.Json.Nodes;
using PostEntity = PrivaPub.Models.Post.Post;
using PrivaPub.Federation.Actors;
namespace PrivaPub.Federation.Controllers
{
[ApiController]
public class WellKnownController : ControllerBase
{
readonly ILocalActorService _localActors;
readonly DbEntities _dbEntities;
public WellKnownController(ILocalActorService localActors, DbEntities dbEntities)
{
_localActors = localActors;
_dbEntities = dbEntities;
}
[HttpGet, Route("/.well-known/webfinger")]
public async Task<IActionResult> WebFinger([FromQuery] string resource, CancellationToken token)
{
if (string.IsNullOrEmpty(resource))
return BadRequest();
LocalActor actor;
if (resource.StartsWith("acct:", StringComparison.OrdinalIgnoreCase))
{
var parts = resource[5..].TrimStart('@').Split('@');
var domain = new Uri(_localActors.BaseAddress).Authority;
if (parts.Length != 2 || !parts[1].Equals(domain, StringComparison.OrdinalIgnoreCase))
return NotFound();
actor = await _localActors.FindByUserName(parts[0], token);
}
else
actor = await _localActors.FindByUri(resource, token);
if (actor is not { IsFederated: true })
return NotFound();
var document = new JsonObject
{
["subject"] = $"acct:{actor.Handle}",
["aliases"] = new JsonArray(actor.Uri),
["links"] = new JsonArray(
new JsonObject { ["rel"] = "self", ["type"] = "application/activity+json", ["href"] = actor.Uri },
new JsonObject { ["rel"] = "http://webfinger.net/rel/profile-page", ["type"] = "text/html", ["href"] = actor.Uri })
};
return Content(document.ToJsonString(), "application/jrd+json; charset=utf-8");
}
[HttpGet, Route("/.well-known/nodeinfo")]
public IActionResult NodeInfoLinks()
{
var document = new JsonObject
{
["links"] = new JsonArray(new JsonObject
{
["rel"] = "http://nodeinfo.diaspora.software/ns/schema/2.0",
["href"] = $"{_localActors.BaseAddress}/nodeinfo/2.0"
})
};
return Content(document.ToJsonString(), "application/json; charset=utf-8");
}
[HttpGet, Route("/nodeinfo/2.0")]
public async Task<IActionResult> NodeInfo(CancellationToken token)
{
var users = await DB.Default.CountAsync<Avatar>(a => !a.DeletionAt.HasValue, token);
var posts = await DB.Default.CountAsync<PostEntity>(p => !p.IsFederatedCopy, token);
var document = new JsonObject
{
["version"] = "2.0",
["software"] = new JsonObject { ["name"] = "privapub", ["version"] = BuildInfo.Ref },
["protocols"] = new JsonArray("activitypub"),
["services"] = new JsonObject { ["inbound"] = new JsonArray(), ["outbound"] = new JsonArray() },
["openRegistrations"] = true,
["usage"] = new JsonObject
{
["users"] = new JsonObject { ["total"] = users },
["localPosts"] = posts
},
["metadata"] = new JsonObject()
};
return Content(document.ToJsonString(), "application/json; profile=\"http://nodeinfo.diaspora.software/ns/schema/2.0#\"; charset=utf-8");
}
}
}