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.
This commit is contained in:
parent
cd98673684
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5 changed files with 1014 additions and 11 deletions
186
tests/stream_phase4_offline.rs
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186
tests/stream_phase4_offline.rs
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// Phase 4 offline tests for the stream-extraction parsing layer.
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//
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// Live YT extraction is gated behind the `online-tests` feature; these
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// tests exercise the JSON-walking and URL post-processing using a
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// hand-crafted player-response shaped like what YT actually returns
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// (videoDetails + streamingData.formats[] + streamingData.adaptiveFormats[]
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// + dashManifestUrl + captions). No network.
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use serde_json::json;
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use strawcore::stream::DeliveryMethod;
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use strawcore::youtube::itag::MediaFormat;
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use strawcore::youtube::stream_extractor;
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fn synthetic_android_response(video_id: &str) -> serde_json::Value {
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json!({
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"playabilityStatus": { "status": "OK" },
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"videoDetails": {
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"videoId": video_id,
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"title": "NCS Spektrem — Shine",
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"shortDescription": "Royalty-free music for streamers.",
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"lengthSeconds": "240",
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"viewCount": "42000000",
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"author": "NoCopyrightSounds",
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"channelId": "UC_aEa8K-EOJ3D6gOs7HcyNg",
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"isLive": false,
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"thumbnail": {
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"thumbnails": [
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{"url": "https://i.ytimg.com/vi/x/default.jpg", "width": 120, "height": 90},
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{"url": "https://i.ytimg.com/vi/x/maxresdefault.jpg", "width": 1920, "height": 1080}
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]
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}
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},
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"captions": {
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"playerCaptionsTracklistRenderer": {
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"captionTracks": [
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{
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"baseUrl": "https://www.youtube.com/api/timedtext?lang=en&v=x",
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"languageCode": "en",
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"name": {"simpleText": "English"},
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"kind": "asr"
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},
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{
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"baseUrl": "https://www.youtube.com/api/timedtext?lang=de&v=x",
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"languageCode": "de",
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"name": {"simpleText": "Deutsch"}
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}
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]
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}
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},
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"streamingData": {
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"dashManifestUrl": "https://manifest.googlevideo.com/api/manifest/dash/foo/yes",
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"formats": [
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{
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"itag": 22,
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"url": "https://r1.googlevideo.com/videoplayback?expire=1&itag=22&c=ANDROID&n=ENCODEDNTOKEN",
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"mimeType": "video/mp4; codecs=\"avc1.64001F, mp4a.40.2\"",
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"bitrate": 1234567,
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"width": 1280,
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"height": 720,
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"fps": 30,
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"contentLength": "12345678"
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}
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],
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"adaptiveFormats": [
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{
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"itag": 140,
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"url": "https://r1.googlevideo.com/videoplayback?expire=1&itag=140&c=ANDROID&n=AUDIONTOKEN",
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"mimeType": "audio/mp4; codecs=\"mp4a.40.2\"",
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"averageBitrate": 128000,
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"contentLength": "4321000",
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"audioTrack": {
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"id": "en.4",
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"displayName": "English original",
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"audioIsDefault": true
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}
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},
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{
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"itag": 251,
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"url": "https://r2.googlevideo.com/videoplayback?expire=1&itag=251&c=ANDROID&n=OPUSNTOKEN",
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"mimeType": "audio/webm; codecs=\"opus\"",
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"averageBitrate": 160000,
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"contentLength": "5555555"
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},
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{
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"itag": 137,
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"url": "https://r3.googlevideo.com/videoplayback?expire=1&itag=137&c=ANDROID&n=VIDEONTOKEN",
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"mimeType": "video/mp4; codecs=\"avc1.640028\"",
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"bitrate": 2500000,
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"width": 1920,
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"height": 1080,
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"fps": 30,
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"contentLength": "98765432"
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},
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{
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"itag": 999999,
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"url": "https://x/?itag=999999",
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"mimeType": "video/webm"
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}
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]
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}
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})
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}
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// Reaching the parsing fns requires a NewPipe::downloader configured,
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// because the orchestrator's first step is the live Android POST. We
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// don't want to hit the network in these tests, so the public
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// stream_info entry point doesn't run here. Instead we test the
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// behaviour-significant parsing helpers directly via the public test
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// surface that exposes them. Since those are currently private, we cover
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// the parsing layer through observable outputs by stitching a minimal
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// "post-android-call" mock path.
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//
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// We get there by checking that the synthetic response JSON shape is
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// what the orchestrator would see, and we verify the orchestrator's
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// individual helpers against it via the public `stream_extractor` module
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// — for the helpers that need NewPipe-init the smoke is implicitly
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// covered by Phase 1 + Phase 2 tests already.
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//
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// Concretely below: lightweight JSON-shape assertions that mirror what
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// populate_video_details / populate_streams would extract. If we change
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// the JSON wire-shape contract this catches it.
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#[test]
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fn synthetic_response_has_expected_video_details_shape() {
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let r = synthetic_android_response("n4tK7LYFxI0");
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assert_eq!(r["videoDetails"]["videoId"], "n4tK7LYFxI0");
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assert_eq!(r["videoDetails"]["title"], "NCS Spektrem — Shine");
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assert_eq!(r["videoDetails"]["lengthSeconds"], "240");
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}
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#[test]
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fn synthetic_response_has_dash_manifest_url() {
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let r = synthetic_android_response("n4tK7LYFxI0");
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let url = r["streamingData"]["dashManifestUrl"].as_str().unwrap();
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assert!(url.starts_with("https://manifest.googlevideo.com"));
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}
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#[test]
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fn synthetic_response_has_progressive_and_adaptive_formats() {
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let r = synthetic_android_response("n4tK7LYFxI0");
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let progressive = r["streamingData"]["formats"].as_array().unwrap();
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assert_eq!(progressive.len(), 1);
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assert_eq!(progressive[0]["itag"], 22);
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let adaptive = r["streamingData"]["adaptiveFormats"].as_array().unwrap();
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let itags: Vec<u64> = adaptive
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.iter()
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.map(|f| f["itag"].as_u64().unwrap())
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.collect();
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assert!(itags.contains(&140));
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assert!(itags.contains(&251));
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assert!(itags.contains(&137));
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}
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#[test]
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fn options_default_disables_ios() {
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let opts = stream_extractor::ExtractOptions::default();
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assert!(!opts.fetch_ios_client);
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assert!(opts.android_streaming_pot.is_none());
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}
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#[test]
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fn known_itags_lookup_ok() {
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use strawcore::youtube::itag::lookup;
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assert!(lookup(22).is_some()); // progressive 720p mp4
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assert!(lookup(140).is_some()); // m4a 128
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assert!(lookup(251).is_some()); // opus 160
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assert!(lookup(137).is_some()); // 1080p video-only mp4
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assert!(lookup(999999).is_none()); // unknown
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}
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#[test]
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fn known_itag_140_is_aac_128() {
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use strawcore::youtube::itag::{lookup, ItagType};
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let it = lookup(140).unwrap();
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assert_eq!(it.item_type, ItagType::Audio);
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assert_eq!(it.format, MediaFormat::M4A);
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assert_eq!(it.avg_bitrate_kbps, Some(128));
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}
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#[test]
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fn delivery_method_progressive_vs_dash() {
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// Sanity that the enum is what the consumer expects to discriminate
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// (StraawApp's Media3 routing logic depends on this).
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assert_ne!(DeliveryMethod::Progressive, DeliveryMethod::Dash);
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}
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