navidrome/utils
Deluan Quintão 756df9decf
fix: dedupe and cap concurrent lyrics plugin fetches (#5792)
* fix: dedupe and cap concurrent lyrics plugin fetches

Clients like Finamp prefetch lyrics for several queue tracks at once. The
resulting burst of concurrent plugin calls can rate-limit the primary
lyrics provider into a timeout, making the plugin fall back to a lower
quality source and cache the bad result.

SimpleCache.GetWithLoader now deduplicates concurrent loads of the same
key via singleflight, with every waiter receiving the winner's result or
error. The Jellyfin lyrics loader is detached from the request context so
one cancelled request cannot fail the load for all waiters, and the
lyrics adapter caps in-flight plugin calls at 2 per plugin, queueing the
rest. As a side effect, the cached HTTP client used by the Last.fm,
Deezer and ListenBrainz agents also collapses identical concurrent
requests into a single upstream call.

* fix: harden lyrics concurrency fixes per review

Replace the stringified singleflight keys with a per-cache flight map
keyed by the cache key type itself, eliminating potential key collisions
for non-string keys, the nil-interface assertion panic, and the
stringification overhead. Release the lyrics semaphore slot via defer so
a panicking plugin call cannot leak it, and bound the detached lyrics
load with a one-minute timeout so a hung plugin cannot pin its
singleflight and semaphore slot indefinitely.
2026-07-16 20:10:35 -04:00
..
cache fix: dedupe and cap concurrent lyrics plugin fetches (#5792) 2026-07-16 20:10:35 -04:00
chrono refactor: multiple syntax updates for Go 1.26 2026-05-19 18:02:36 -03:00
gg feat(subsonic): add structured sidecar lyrics support with OpenSubsonic v2 karaoke cues and agent layers (#5076) 2026-06-19 12:00:58 -04:00
gravatar feat(bfr): Big Refactor: new scanner, lots of new fields and tags, improvements and DB schema changes (#2709) 2025-02-19 20:35:17 -05:00
hasher refactor: run Go modernize (#5002) 2026-02-08 09:57:30 -05:00
ioutils fix: handle UTF BOM in lyrics and playlist files (#4637) 2025-10-31 09:07:23 -04:00
jsoncommentstrip refactor(jsoncommentstrip): replace go-jsoncommentstrip with custom JSON comment stripping 2026-03-14 10:18:56 -04:00
merge Upgrade Go to 1.23 (#3190) 2024-08-19 17:47:54 -04:00
nanoid refactor(nanoid): replace gonanoid with custom nanoid implementation for ID generation 2026-03-13 21:06:26 -04:00
natural refactor(natural): replace maruel/natural with custom natural sort implementation 2026-03-14 10:18:56 -04:00
number chore(deps): remove direct dependency on golang.org/x/exp 2025-12-31 17:03:44 -05:00
pl chore: upgrade golangci-lint to 2.11 and fix lint issues 2026-03-06 19:23:47 -05:00
random refactor: run Go modernize (#5002) 2026-02-08 09:57:30 -05:00
req refactor: multiple syntax updates for Go 1.26 2026-05-19 18:02:36 -03:00
run refactor: rename chain package to run and update references 2025-06-14 17:19:06 -04:00
shellquote refactor(shellquote): replace go-shellquote with custom shell quoting implementation 2026-03-14 10:23:45 -04:00
singleton refactor: run Go modernize (#5002) 2026-02-08 09:57:30 -05:00
slice perf(subsonic): speed up artist search3 deep-offset pagination (#5620) 2026-06-16 21:47:15 -04:00
str fix(search): artists with atomic non-ASCII names unfindable after FTS5 migration (#5703) 2026-07-02 12:53:10 -04:00
context.go Refactored agents calling into its own struct 2021-06-08 17:00:02 -04:00
context_test.go Upgrade Ginkgo to V2 2022-07-26 16:53:17 -04:00
encrypt.go feat(bfr): Big Refactor: new scanner, lots of new fields and tags, improvements and DB schema changes (#2709) 2025-02-19 20:35:17 -05:00
encrypt_test.go Upgrade Ginkgo to V2 2022-07-26 16:53:17 -04:00
files.go feat(playlist): support #EXTALBUMARTURL directive and sidecar images (#5131) 2026-03-02 11:39:59 -05:00
files_test.go ci: run Go tests on Windows (#5380) 2026-04-19 13:16:47 -04:00
index_group_parser.go refactor: run Go modernize (#5002) 2026-02-08 09:57:30 -05:00
index_group_parser_test.go Upgrade Ginkgo to V2 2022-07-26 16:53:17 -04:00
limiter.go feat(bfr): Big Refactor: new scanner, lots of new fields and tags, improvements and DB schema changes (#2709) 2025-02-19 20:35:17 -05:00
time.go fix(scanner): always refresh folder image time when adding first image (#3764) 2025-03-06 22:16:37 -05:00
time_test.go fix(scanner): always refresh folder image time when adding first image (#3764) 2025-03-06 22:16:37 -05:00
utils_suite_test.go Upgrade Ginkgo to V2 2022-07-26 16:53:17 -04:00