Phase 4 (complete) — stream_extractor orchestrator
Wire the Android-primary fetch path + JSON-walking + URL post-processing
into a single stream_info(video_id) entry point. Mirrors NPE
YoutubeStreamExtractor.onFetchPage() per audit Track C §1.2.
src/youtube/stream_extractor.rs
* stream_info(video_id) + stream_info_with(video_id, options)
* fetch_android — reel endpoint (anonymous) OR /player (with po_token)
* check_playability_status — maps to ContentUnavailable variants
(AgeRestricted, GeoRestricted, Paid, Private, YoutubeMusicPremium,
AccountTerminated, Other)
* is_player_response_not_valid — decoy-video detection
* populate_video_details + populate_microformat + populate_streams +
populate_manifests + populate_captions
* process_url — sig deobf path (signatureCipher → JS function call)
+ unconditional nsig deobf + cpn append + pot append
* build_video_progressive / build_video_only / build_audio +
push_*_dedup helpers (FIX: NPE bug — dedup by itag id, not by
mediaFormat.id which collides 140/141)
Consolidated stream_helper's local ExtractionError into the crate-wide
exceptions::ExtractionError with a new DownloaderMissing variant.
Tests: 73 lib unit pass (+9 since Phase 3) + 7 new Phase 4 offline
integration tests = 80 lib green. Live YT end-to-end smoke deferred
to Straw integration; the code path is in place.
Kayos
a47e142ab7