NeverFiveHundredTests walks every endpoint the server maps and fills each route parameter
with junk ('x', zeroed and random ObjectIds, a dot-dot segment, 5000 characters). It calls
each one anonymously, as a persona, and with a junk token, and asserts that nothing
answers 5xx or throws, and that every /api error carries a Mastodon error body.
It found two bugs:
- A junk 'Authorization: Bearer' on any non-/api route, anonymous ones included
(/build.json, /peasants/*, inboxes), broke the response. JwtEvents.AuthenticationFailed
wrote a body during authentication and the endpoint then wrote its own. The 401 body now
comes from the Challenge event, which runs only when an endpoint needs a user.
- /api answered 401, 404 and 429 with no body. UseMastodonErrorBodies gives any /api error
that leaves without a body Mastodon's {"error": ...}.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ELjqpznMFMNrJoJUj6K5p2
With a token for a persona, a Mastodon client can now:
- accounts: verify/update credentials (display name, note, fields, locked,
bot, discoverable, indexable, hide collections, posting defaults; the
change federates as Update{Person}), get, lookup, statuses (paged, by
visibility to the viewer), relationships, search, follow and unfollow,
follow requests (authorize and reject answer remote followers with
Accept or Reject), remove from followers. Followers and following lists
are shown to their owner only.
- statuses: post (plain text, mentions, hashtags, replies, content
warnings, the four visibilities, Idempotency-Key), get, edit (PUT),
delete returning the source for redrafting, context, history, source,
favourite, reblog and their undos, favourited_by and reblogged_by.
- timelines: home, public (local or remote), tag; favourites;
conversations; markers.
- notifications: list with types and exclude_types, get, dismiss, clear,
unread count.
- /api/v2/search, resolving a handle or a URL to an account or a post.
Media, polls, pins, bookmarks, mutes, blocks, lists, filters, trends and
push answer empty lists or a 422 saying they are not supported yet, so
clients degrade instead of failing. Public reads work without a token.
Persona settings (locked, bot, indexable, discoverable) now also shape
the ActivityPub actor.
Fixed on the way: three conditional expressions whose `default` was the
value type's, so a missing limit became 1, a missing flag became false and
an attachment without dimensions became 0x0.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
OpenIddict 7.7 (MongoDB stores, keys kept in Mongo so tokens survive
restarts) serves /oauth/authorize, /oauth/token, /oauth/revoke and the
discovery documents, including /.well-known/oauth-authorization-server:
- authorization code (PKCE optional) and client credentials, Mastodon's
scopes including the granular ones, non-expiring reference tokens,
`created_at` in the token response, and the urn:ietf:wg:oauth:2.0:oob
page that shows the code;
- /oauth/login signs the private login into a fifteen-minute cookie that
only /oauth sees (rate limited, antiforgery-protected); /oauth/authorize
then asks which persona the application acts as. The token's subject
is that persona's id and nothing else; no root id reaches a token, an
authorization or a log line;
- the token exchange refuses a persona whose login is banned or deleted,
and every API request checks the same.
/api/v1/apps registers applications dynamically, /api/v1/apps/
verify_credentials, /api/v1/instance (v1 and v2, "4.2.0 (compatible;
PrivaPub)") and verify_credentials answer in Mastodon's shapes: snake_case
with explicit nulls, Rails-style parameters from query, form or JSON,
{"error": ...} on failure, Link paging. CORS exposes Link.
/api goes to OpenIddict validation and everything else to the existing
JWT; the JWT failure handler no longer sends the exception and stack trace
to the client.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
thepraandClaude Opus 5.5