sulthan
92eba07da7
Closes #59. Part of spec #55, and the ticket that fixes the reported bug #47. Architecture: `docs/adr/0007-backend-hosts-cover-bytes.md`. Does not close #47 or #55. ## What changed A Reader bookmarks a Series nobody holds yet — the exact case in #47 — and within seconds the list shows its artwork instead of a broken image. The first Bookmark to create a Series fires `Store.OnSeriesCreated` after commit, and the new `latest.Acquirer` turns that into **one** series-page fetch that yields both the Latest Chapter and the cover URL. The bytes go through the gated cover fetcher from #57 and are stored content-addressed through #56, so the wire carries an absolute URL on this deployment's own origin — never a third-party address, and never one that 404s. ### Store - Migration `0009_series_cover_address.sql` adds `series.cover_address`. The two facts are now split: `series.cover` is the third-party source address the bytes came from (the acquisition path's dedupe key), `series.cover_address` is the SHA-256 they are stored under. An empty `cover_address` is precisely what "no Cover yet" means, which is the distinction both the API and the UI depend on. - `SetSeriesCover` writes the address only after the bytes are on disk, so the wire can never name an object that is not there. - `CoverWireURL` builds `PUBLIC_BASE_URL + /covers/<sha256>` for every scanned row, and returns `""` for a blank address. - The cover columns are gone from `Upsert`'s `INSERT` and its `DO UPDATE`. A client-supplied cover cannot reach the shared Series row on any path, not just the creation path. - `Open` now rejects a base URL that is not an absolute `http(s)` origin: `PUBLIC_BASE_URL=bookmarks.example.com` would otherwise start cleanly and emit addresses no browser can load. ### Acquisition - `internal/latest/acquire.go`: one fetch, gated by the poller's own `fetchableSeriesURL` (a `series_url` arrives in a client-supplied PUT body, so without the gate a token-holder chooses what the server fetches from its own network position). - Asynchronous and log-and-drop. The Bookmark, its progress and its Latest Chapter are already committed; a Site that is down or a cover that cannot be produced disturbs none of them. - Bounded by a two-slot semaphore. A bulk sync creating N Series would otherwise fire N simultaneous requests from one IP — the traffic shape the poller's stagger exists to avoid. - Cancelled at shutdown (shares the poller's context) and stamps `latest_checked_at`, so the poller does not refetch the same page a tick later. - Browser-backed Sites (kagane, novelfull) are deliberately skipped: their pages only yield a Cloudflare challenge to the TLS client, so the request would be spent for nothing. They arrive in #62. ### Wire and route - `GET /covers/{address}` serves the bytes publicly and uncredentialed with `Cache-Control: public, max-age=604800, immutable`. The address is gated by a `^[0-9a-f]{64}$` pattern and cross-checked against a pure function of itself before any filesystem read, so no request shaped like a traversal reaches disk. - `PUT /bookmarks/{key}` still accepts a `cover` field and discards it, permanently. Rejecting it would break every installed userscript the moment this deploys, and ADR-0004's compatibility argument depends on those scripts continuing to work. The decode site says so in place of a TODO nobody intends to keep. - `store.CoverContentType` canonicalises comix's non-standard `image/jpg` to `image/jpeg`, so one image cannot land under two spellings. This one was found by the live smoke test, not by reading. ### Config `PUBLIC_BASE_URL` is new and required (cover URLs must go out absolute — the userscript renders them on third-party origins, where a relative path resolves against the Site). Documented in `.env.example`, `docker-compose.yml` (`:?` so compose fails too), `DEPLOY.md` and `backend/AGENTS.md`. ## Acceptance criteria All twelve of #59's criteria are met; the checklist on the issue is ticked with the evidence. ## Verification - `go test ./...` green (Docker-backed Postgres suite). - Live smoke against a real backend + Postgres: bookmarking `comix:n8we-dungeons-and-crayons` produced `"cover": "http://127.0.0.1:8099/covers/8ce74d80…"` and `"latest_chapter": "Chapter 81"` within seconds of the PUT; `curl` on that address returned `200`, `Content-Type: image/jpeg`, `Cache-Control: public, max-age=604800, immutable`, and a 280x420 JPEG. That run is what surfaced the `image/jpg` content type. - Mutation-checked the asynchrony test: removing the `go` from `Acquire` turns `TestAcquireDoesNotBlockTheWrite` red. ## Reviewed Both axes of `/code-review` were run against this diff before commit. Their findings that were actionable here are folded in: the concurrency bound, the shutdown tie, the `PUBLIC_BASE_URL` validation, the missing `latest_checked_at` stamp, and a test that could not fail. ## Known sequencing A kagane/novelfull Series created between this deploy and #62 has no cover source at all: the acquisition skips those Sites and `Upsert` no longer persists the userscript-scraped address. This is #59's stated boundary rather than a defect, but it is a user-visible gap on two Sites and should order #62 accordingly. Reviewed-on: #68 Co-authored-by: Sulthan Zaki <sultankiki05@gmail.com> Co-committed-by: Sulthan Zaki <sultankiki05@gmail.com>
9 lines
524 B
SQL
9 lines
524 B
SQL
-- The Cover splits into two facts. `cover` keeps the third-party address the
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-- bytes come from, which is what the acquisition path refetches and dedupes
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-- on; `cover_address` is the content address of the bytes once they are
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-- actually stored, and is what the wire's absolute URL is built from.
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--
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-- Empty `cover_address` therefore means "no Cover yet" rather than "a Cover
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-- that 404s", which is the distinction the API and the UI both depend on.
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ALTER TABLE series ADD COLUMN cover_address text NOT NULL DEFAULT '';
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