* sloppak: read cover without unpacking + serialize/cap zip unpacks
Album art for a zip-form sloppak was served by resolve_source_dir(), which
unpacks the ENTIRE archive (stems included, ~30 MB) to disk just to read
cover.jpg. On the library grid that meant a full extraction per card on scroll.
- read_cover_bytes(): opens only the cover member from the zip (or reads the
file for dir-form), with zip-slip guarding. ~4 ms vs a full unpack.
- resolve_source_dir(): per-file lock + bounded global semaphore so concurrent
callers don't rmtree + re-extract the same dest at once (a race), and a burst
can't saturate disk/CPU. 8 concurrent calls now dedupe to 1 unpack.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* server: serve sloppak art via read_cover_bytes + cache album-art responses
- get_song_art() sloppak branch now reads the cover directly (no full unpack),
off-thread via asyncio.to_thread.
- All art responses carry Cache-Control: public, max-age=86400. URLs are already
cache-busted with ?v=<mtime>, so the browser stops re-fetching every cover on
scroll-back; day bound self-heals any URL missing ?v.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* v3 library: lazy-load + async-decode card cover images
The grid (24 cards/page) and artist-row thumbnails emitted plain <img> with no
loading hint, so a whole page of covers fetched + decoded at once on each
scroll batch. Add loading="lazy" decoding="async" to defer off-screen fetches
and keep image decode off the main thread.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* address Codex review: zip cover normalization + correct art revalidation
Findings from the preflight Codex passes:
- sloppak.read_cover_bytes (zip form) read the raw manifest cover string via
zf.read(), so a non-canonical name like './cover.jpg' or 'art/../cover.jpg'
404'd. Normalize via safe_join → relative member; reject escape and the
degenerate root-collapse case ('.', 'subdir/..') like _unpack_zip does.
- Album-art caching is correctness-first: Cache-Control: no-cache plus a strong
validator, with real conditional handling (Starlette FileResponse emits an
ETag but doesn't evaluate If-None-Match). All three art paths route through
_art_conditional/_file_art_response → bodyless 304 on a matching validator.
A long immutable max-age was rejected because the frontend ?v=<mtime> buster
is only second-resolution and would pin a same-second rewrite.
- The sloppak cover is validated by CONTENT (sha1 of the bytes), not a stat:
a dir-form sloppak edited in place changes the cover file's mtime but not the
directory's, so a dir-stat ETag could emit a stale 304. Content hashing is
correct for both dir- and zip-form. get_song_art gained an optional request
(internal get_art caller passes none — safe).
Adds tests/test_sloppak_cover_art.py pinning read_cover_bytes (canonical,
non-canonical, degenerate/escape, dir/zip, webp) and the endpoint's 304 contract
incl. the dir-form in-place-edit no-stale-304 regression.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- diagnostics_redact: keep '.psarc' in the song-filename scrub regex.
The purge swapped it for '.archive' (not a real extension), which
would leak real .psarc filenames still on users' disks into
diagnostic bundles. This is a redaction allow-list, not brand text.
- sloppak: the legacy lyrics-source alias was a no-op
({"notechart": "notechart"}), so old manifests with
lyrics_source=="sng" fell back to "xml" instead of migrating.
Map {"sng": "notechart"} so the rename stays back-compatible.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reword comments/docstrings/strings and rename identifiers that referenced
the external game and its file formats:
- format-id "psarc" -> "archive"; local vars psarc_path -> song_path,
psarc_base -> tone_base
- lyrics provenance value "sng" -> "notechart" (legacy "sng" still accepted)
- highway_3d fret-ghost scope value "rocksmith" -> "chords" (invalid/legacy
values fall back to the default, preserving behaviour)
- neutralise references in prose, test names/data, .gitattributes and docs
No functional change beyond the renamed identifiers; all Python compiles.
