Two holes let a provider's verification requirement vanish so the fallback
chain failed outright instead of opening the challenge:
- classifyDownloadErrorType did not recognize 'signed session expired'
(the exact error ensureSignedSession returns), so an expired session
failed generically.
- Extensions that catch the needsVerification response internally (e.g.
qobuz-web's availability search) report a plain 'not available', which
the fallback loop skipped past silently.
The runtime now remembers when a signed-session call inside the current
script invocation required verification; the provider wrapper consumes
that after checkAvailability/download and tags the failure as
verification_required, regardless of how the script handled it. The
source-extension path also classifies thrown errors now.
Go:
- callExtensionScript generic replaces the ~40-line perf/lock/run/
timeout skeleton in ten wrapper methods; PostProcess V1/V2 share
postProcessCommon (V1 keeps its postProcess-only probe)
- attemptExtensionDownload extracts the duplicated provider download
attempt from the source-extension and priority-loop paths;
overlayStr/overlayInt collapse the enrichment overlay chains;
buildDownloadFilename shared by both output-path builders
Dart (download_queue_provider):
- _replaceSafFileVia wraps the SAF copy/operate/publish/cleanup
roundtrip used at eight sites
- decrypt and external-LRC finalization unified between the inline
and native-worker pipelines (divergences parametrized: AC-4 repair,
per-stage error messages, base-name resolution, extension-state
snapshot); HIGH/container conversion keep separate lenient/strict
policies and share only the SAF mechanics
gofmt -r rewrite of all 506 interface{} occurrences to the any alias
(identical semantics), drop unused spec constants into comments, rename
unused parameters to _, convert three if-else chains to tagged
switches, and use slices.ContainsFunc for the private-IP check. No
behavior change; the whole package is now gofmt-clean.
Pure mechanical move within package gobackend — no signature or behavior
change. extension_providers.go (3,798 lines) now holds only the
extensionManager provider-listing/orchestration methods; DTOs, goja value
conversion, the provider wrapper methods, download fallback, and priority
state moved to extension_{provider_types,goja_convert,provider_wrapper,
fallback,priority}.go.
zarzet