hl-valdemar
4576080955
The sidebar scheduler waited for playback and used full stream extraction for titles. Use independent utility-priority title requests, native YouTube oEmbed, and metadata-only extraction for generic sites. Preserve foreground title precedence and stale row protection. Verified: make check-youtube check-queue check-resolved check-adaptive check-stream all.
625 lines
36 KiB
Swift
625 lines
36 KiB
Swift
import Foundation
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import Darwin
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@main
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struct YouTubeResolverChecks {
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struct Failure: Error, CustomStringConvertible {
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let description: String
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}
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static let page = URL(string: "https://www.youtube.com/watch?v=jNQXAC9IVRw")!
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static let splitJSON = #"""
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{
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"title": "Separate streams", "duration": 19.25, "is_live": false,
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"http_headers": {"Referer": "https://www.youtube.com/", "User-Agent": "metadata-agent"},
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"requested_formats": [
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{"url": "https://media.example/video?token=video", "vcodec": "av01.0.04M.08", "acodec": "none", "dynamic_range": "SDR", "http_headers": {"User-Agent": "video-agent", "X-Input": "video"}},
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{"url": "https://media.example/audio?token=audio", "vcodec": "none", "acodec": "opus"}
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]
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}
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"""#
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static let combinedJSON = #"""
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{"title": "Combined stream", "duration": 12, "is_live": false,
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"url": "https://media.example/combined", "vcodec": "h264", "acodec": "aac",
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"http_headers": {"User-Agent": "combined-agent"}}
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"""#
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static func require(_ condition: @autoclosure () throws -> Bool, _ message: String) throws {
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if try condition() == false { throw Failure(description: "FAIL: \(message)") }
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}
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static func reject(_ message: String, _ operation: () throws -> Void) throws {
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do { try operation() }
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catch is Failure { throw Failure(description: "FAIL: \(message) assertion failed") }
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catch { return }
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throw Failure(description: "FAIL: \(message) was accepted")
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}
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static func decode(_ json: String) throws -> YouTubeVideo {
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try YouTubeResolver.decode(Data(json.utf8), webpageURL: page)
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}
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static func decode(_ object: [String: Any]) throws -> YouTubeVideo {
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try YouTubeResolver.decode(JSONSerialization.data(withJSONObject: object), webpageURL: page)
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}
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static func fixture(_ json: String) throws -> [String: Any] {
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try JSONSerialization.jsonObject(with: Data(json.utf8)) as! [String: Any]
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}
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static func headerLines(_ text: String) throws -> Set<String> {
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try require(text.isEmpty || text.hasSuffix("\r\n"), "headers terminate with CRLF")
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let lines = text.components(separatedBy: "\r\n").filter { !$0.isEmpty }
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try require(lines.allSatisfy { !$0.contains("\r") && !$0.contains("\n") },
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"headers contain no bare CR or LF")
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return Set(lines)
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}
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static func videoURLs() throws {
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let valid = [
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"https://youtube.com/watch?v=jNQXAC9IVRw",
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"https://www.youtube.com/watch?v=jNQXAC9IVRw&list=PLignored&t=3",
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"https://m.youtube.com/watch?v=jNQXAC9IVRw",
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"https://music.youtube.com/watch?v=jNQXAC9IVRw",
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"https://youtu.be/jNQXAC9IVRw?si=share",
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"https://www.youtube.com/shorts/jNQXAC9IVRw",
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"https://www.youtube.com/live/jNQXAC9IVRw",
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"https://www.youtube.com/embed/jNQXAC9IVRw"
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]
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for input in valid {
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let url = try YouTubeResolver.validateURL(input)
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try require(url == page, "supported video URLs identify the same video")
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}
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for input in ["https://vimeo.com/76979871", "https://example.com/watch?v=jNQXAC9IVRw",
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"https://youtube.com.evil.example/watch?v=jNQXAC9IVRw",
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"https://evil.youtube.com/watch?v=jNQXAC9IVRw",
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"http://127.0.0.1:8080/video.mp4?token=kept#fragment",
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"https://www.youtube.com/playlist?list=PLexample"] {
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try require(try YouTubeResolver.validateURL(input).absoluteString == input,
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"HTTP(S) URLs outside canonical YouTube video forms reach yt-dlp unchanged")
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}
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let hostile = [
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"", "not a URL", "javascript:alert(1)", "file:///watch?v=jNQXAC9IVRw",
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"ftp://example.com/video", "https://", "https://example.com:0/video",
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"https://example.com:65536/video", "https://example.com/video\ninjected",
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"https://youtube.com@evil.example/watch?v=jNQXAC9IVRw",
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"https://user:password@www.youtube.com/watch?v=jNQXAC9IVRw"
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]
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for input in hostile {
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try reject("hostile or malformed video URL") { _ = try YouTubeResolver.validateURL(input) }
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}
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let asciiID = try YouTubeResolver.validateURL("https://youtu.be/Abc_123-XYZ")
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try require(asciiID.absoluteString.hasSuffix("v=Abc_123-XYZ"), "video IDs retain case, underscore and hyphen")
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}
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static func metadata() throws {
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let split = try decode(splitJSON)
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try require(split.title == "Separate streams" && split.duration == 19.25 && !split.isLive,
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"split streams preserve title, fractional duration and recorded status")
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try require(split.webpageURL == page, "resolved media retains its webpage URL")
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try require(split.video.url == "https://media.example/video?token=video"
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&& split.audio?.url == "https://media.example/audio?token=audio",
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"video and audio inputs remain distinct and preserve signed query strings")
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let videoHeaders = try headerLines(split.video.headers)
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let audioHeaders = try headerLines(split.audio!.headers)
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try require(videoHeaders == ["User-Agent: video-agent", "X-Input: video"],
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"selected video headers take precedence as a complete map")
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try require(audioHeaders == ["Referer: https://www.youtube.com/", "User-Agent: metadata-agent"],
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"audio without selected headers inherits metadata headers")
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var splitObject = try fixture(splitJSON)
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var formats = splitObject["requested_formats"] as! [[String: Any]]
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formats.reverse()
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formats[0]["http_headers"] = ["X-Input": "audio"]
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formats[1]["http_headers"] = NSNull()
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splitObject["requested_formats"] = formats
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let reversed = try decode(splitObject)
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let reversedVideoHeaders = try headerLines(reversed.video.headers)
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let reversedAudioHeaders = try headerLines(reversed.audio!.headers)
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try require(reversed.video.url == split.video.url && reversed.audio?.url == split.audio?.url,
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"stream roles depend on codecs rather than array order")
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try require(reversedVideoHeaders == audioHeaders && reversedAudioHeaders == ["X-Input: audio"],
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"each input independently selects its own headers or metadata fallback")
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let combined = try decode(combinedJSON)
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try require(combined.video.url == "https://media.example/combined" && combined.audio == nil,
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"combined fallback uses one input, not duplicated audio")
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try require(combined.title == "Combined stream" && combined.duration == 12 && !combined.isLive,
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"combined metadata is preserved")
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let combinedHeaders = try headerLines(combined.video.headers)
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try require(combinedHeaders == ["User-Agent: combined-agent"], "combined input carries headers")
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var selectedCombined = try fixture(combinedJSON)
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selectedCombined.removeValue(forKey: "url")
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selectedCombined["requested_formats"] = [
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["url": "https://media.example/selected-combined", "vcodec": "h264", "acodec": "aac",
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"http_headers": ["X-Input": "combined"]]
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]
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let selected = try decode(selectedCombined)
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let selectedHeaders = try headerLines(selected.video.headers)
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try require(selected.audio == nil && selected.video.url == "https://media.example/selected-combined"
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&& selectedHeaders == ["X-Input: combined"],
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"a selected combined format is one playable input with its own headers")
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var hls = try fixture(combinedJSON)
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hls["url"] = "https://media.example/live.m3u8"
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hls["protocol"] = "m3u8_native"
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let playlist = try decode(hls)
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try require(playlist.video.url == "https://media.example/live.m3u8" && playlist.audio == nil,
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"native HLS remains a usable streaming playlist, not a downloaded file")
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var live = try fixture(combinedJSON)
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live["is_live"] = true
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live["duration"] = NSNull()
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let directLive = try decode(live)
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try require(directLive.isLive && directLive.duration == 0, "live stream permits unknown duration")
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live.removeValue(forKey: "is_live")
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live.removeValue(forKey: "duration")
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live["live_status"] = "is_live"
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try require(try decode(live).isLive, "live_status identifies live broadcasts")
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live["live_status"] = "was_live"
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try require(!(try decode(live)).isLive, "completed live broadcasts are recorded media")
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live["live_status"] = "is_upcoming"
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try reject("upcoming broadcast with no playable live content") { _ = try decode(live) }
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var emptyHeaders = try fixture(combinedJSON)
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emptyHeaders.removeValue(forKey: "http_headers")
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try require(try decode(emptyHeaders).video.headers.isEmpty, "absent headers serialize to an empty block")
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}
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static func qualities() throws {
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func video(_ height: Int, audio: Bool = false, range: String = "SDR", transport: String = "https") -> [String: Any] {
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["height": height, "vcodec": "h264", "acodec": audio ? "aac" : "none",
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"dynamic_range": range, "protocol": transport, "url": "https://media.example/\(height)p"]
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}
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let audio: [String: Any] = ["vcodec": "none", "acodec": "aac", "url": "https://media.example/audio"]
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var object: [String: Any] = [
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"requested_formats": [video(1080), audio],
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"formats": [video(2160), video(1440), video(1080), video(1080, audio: true), video(720),
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video(480), video(4320, range: "HDR10"), video(360, transport: "http_dash_segments"),
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video(0), audio]
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]
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let normal = try decode(object)
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try require(normal.height == 1080 && normal.availableHeights == [2160, 1440, 1080, 720, 480],
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"quality choices are unique playable SDR resolutions, including manual choices above the default cap")
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object["requested_formats"] = [video(720), audio]
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try require(try decode(object).height == 720, "a lower available resolution is accepted by the default policy")
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object["requested_formats"] = [video(2160), audio]
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try reject("4K stream selected by the default policy") { _ = try decode(object) }
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let data = try JSONSerialization.data(withJSONObject: object)
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let high = try YouTubeResolver.decode(data, webpageURL: page, height: 2160)
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try require(high.height == 2160 && high.video.url == "https://media.example/2160p",
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"explicit selection permits supported 4K video")
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try reject("requested resolution silently replaced by another") {
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_ = try YouTubeResolver.decode(data, webpageURL: page, height: 1440)
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}
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object["requested_formats"] = [video(720, audio: true)]
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object["formats"] = [video(2160), video(720, audio: true)]
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try require(try decode(object).availableHeights == [720],
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"video-only resolutions without a playable separate audio stream are not offered")
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object["requested_formats"] = [video(-720, audio: true)]
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try reject("invalid selected video dimensions") { _ = try decode(object) }
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}
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static func malformedMetadata() throws {
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var collection = try fixture(combinedJSON)
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collection["_type"] = "playlist"
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try reject("collection result instead of a single video") { _ = try decode(collection) }
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try reject("non-JSON extractor output") { _ = try decode("not JSON") }
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for json in ["null", "[]", "{}", #"{"requested_formats":[]}"#] {
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try reject("missing playable stream metadata") { _ = try decode(json) }
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}
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try reject("nonfinite duration") {
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_ = try decode(#"{"url":"https://media.example/video","vcodec":"h264","acodec":"aac","duration":1e999}"#)
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}
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let combined = try fixture(combinedJSON)
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var missingURL = combined
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missingURL.removeValue(forKey: "url")
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try reject("missing combined stream URL") { _ = try decode(missingURL) }
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for key in ["url", "vcodec", "acodec"] {
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var object = combined
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object[key] = 17
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try reject("wrong type for combined \(key)") { _ = try decode(object) }
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}
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for url in ["", "https://", "file:///tmp/video", "ftp://media.example/video",
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"data:video/mp4;base64,AA==", "https://media.example/video\r\nX-Injected: yes"] {
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var object = combined
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object["url"] = url
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try reject("invalid or unsafe stream URL") { _ = try decode(object) }
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}
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for duration in [-1, "19", true] as [Any] {
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var object = combined
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object["duration"] = duration
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try reject("invalid duration metadata") { _ = try decode(object) }
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}
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for key in ["is_live", "title"] {
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var object = combined
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object[key] = ["malformed"]
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try reject("malformed \(key) metadata") { _ = try decode(object) }
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}
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var hdr = combined
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hdr["dynamic_range"] = "HDR10"
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try reject("HDR input unsupported by the SDR renderer") { _ = try decode(hdr) }
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var audioOnly = combined
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audioOnly["vcodec"] = "none"
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try reject("explicitly audio-only result") { _ = try decode(audioOnly) }
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for transport in ["http_dash_segments", "mhtml", "rtmp"] {
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var object = combined
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object["protocol"] = transport
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try reject("fragment assembly or unsupported transport is not a whole playable input") {
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_ = try decode(object)
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}
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}
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let split = try fixture(splitJSON)
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let formats = split["requested_formats"] as! [[String: Any]]
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for malformed in ["bad", [formats[0]], [formats[1]], [formats[0], formats[0]],
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[formats[0], formats[1], formats[1]]] as [Any] {
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var object = split
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object["requested_formats"] = malformed
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try reject("malformed or ambiguous split stream selection") { _ = try decode(object) }
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}
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var missingAudio = split
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var badFormats = formats
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badFormats[1].removeValue(forKey: "url")
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missingAudio["requested_formats"] = badFormats
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try reject("missing separate audio URL is not silently downgraded") { _ = try decode(missingAudio) }
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let badHeaders: [Any] = [
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"not a header map", ["User-Agent": 5], ["Bad Name": "value"], ["Bad:Name": "value"],
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["Bad\r\nName": "value"], ["": "value"], ["X-Header": "a\r\nInjected: yes"],
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["X-Header": "a\nb"], ["X-Header": "a\rb"], ["X-Header": "a\u{0}b"],
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["X-Header": "a\t b"], ["X-Header": "a\u{7f}b"]
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]
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for headers in badHeaders {
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var object = combined
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object["http_headers"] = headers
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try reject("unsafe or malformed metadata headers") { _ = try decode(object) }
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var perInput = split
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var selected = formats
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selected[1]["http_headers"] = headers
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perInput["requested_formats"] = selected
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try reject("unsafe or malformed selected audio headers") { _ = try decode(perInput) }
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}
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}
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struct Extractor: Sendable {
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let executable: URL
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let directory: URL
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init(root: URL, name: String, json: String = YouTubeResolverChecks.splitJSON,
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body: String = #"/bin/cat "$base/response.json""#) throws {
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directory = root.appendingPathComponent(name, isDirectory: true)
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try FileManager.default.createDirectory(at: directory, withIntermediateDirectories: false)
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executable = directory.appendingPathComponent("fake-extractor")
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let script = "#!/bin/sh\nset -eu\nbase=${0%/*}\n: > \"$base/started\"\n" + body + "\n"
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try Data(script.utf8).write(to: executable)
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try FileManager.default.setAttributes([.posixPermissions: 0o700], ofItemAtPath: executable.path)
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try Data(json.utf8).write(to: directory.appendingPathComponent("response.json"))
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}
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func marker(_ name: String) -> URL { directory.appendingPathComponent(name) }
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}
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static func awaitMarker(_ extractor: Extractor, _ name: String = "started") async throws {
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for _ in 0..<400 {
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if FileManager.default.fileExists(atPath: extractor.marker(name).path) { return }
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try await Task.sleep(for: .milliseconds(5))
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}
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throw Failure(description: "FAIL: extractor did not reach \(name) within the isolated check deadline")
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}
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static func cancelled<T: Sendable>(_ task: Task<T, Error>, _ message: String) async throws {
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do { _ = try await task.value }
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catch is CancellationError { return }
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catch { throw Failure(description: "FAIL: \(message) returned an extraction error instead of cancellation") }
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throw Failure(description: "FAIL: \(message) returned media instead of cancellation")
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}
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final class TitleProtocol: URLProtocol, @unchecked Sendable {
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static let stalled = AsyncStream<Void>.makeStream()
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override class func canInit(with request: URLRequest) -> Bool { true }
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override class func canonicalRequest(for request: URLRequest) -> URLRequest { request }
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override func startLoading() {
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let parts = URLComponents(url: request.url!, resolvingAgainstBaseURL: false)!
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precondition(parts.scheme == "https" && parts.host == "www.youtube.com" && parts.path == "/oembed")
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precondition(request.value(forHTTPHeaderField: "Cookie") == nil)
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let page = parts.queryItems!.first { $0.name == "url" }!.value!
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precondition(parts.queryItems!.first { $0.name == "format" }!.value == "json")
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let id = URLComponents(string: page)!.queryItems!.first!.value!
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if id == "CancelledAA" {
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Self.stalled.continuation.yield()
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return
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}
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let status = id == "Unavailable" ? 404 : 200
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let mime = id == "WrongMimeAA" ? "text/html" : "application/json"
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let oversized = ["OversizedAA", "ChunkedAAAA"].contains(id)
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let body = oversized ? Data(repeating: 32, count: 65537) :
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Data((id == "MalformedAA" ? "not JSON" : #"{"title":" Early YouTube title "}"#).utf8)
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var headers = ["Content-Type": mime]
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if id != "ChunkedAAAA" { headers["Content-Length"] = "\(body.count)" }
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client!.urlProtocol(self, didReceive: HTTPURLResponse(url: request.url!, statusCode: status,
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httpVersion: nil, headerFields: headers)!,
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cacheStoragePolicy: .notAllowed)
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client!.urlProtocol(self, didLoad: body)
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client!.urlProtocolDidFinishLoading(self)
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}
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override func stopLoading() {}
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}
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static func titles(root: URL) async throws {
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let configuration = URLSessionConfiguration.ephemeral
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configuration.protocolClasses = [TitleProtocol.self]
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let youtube = try await YouTubeResolver.resolveTitle(URL(string: "https://youtu.be/jNQXAC9IVRw")!,
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executableURL: URL(fileURLWithPath: "/missing-helper"), configuration: configuration)
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try require(youtube == "Early YouTube title", "native YouTube oEmbed needs no extractor, runtime or playable formats")
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for id in ["Unavailable", "WrongMimeAA", "OversizedAA", "ChunkedAAAA", "MalformedAA"] {
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do {
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_ = try await YouTubeResolver.resolveTitle(URL(string: "https://youtu.be/\(id)")!, configuration: configuration)
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throw Failure(description: "FAIL: invalid oEmbed response was accepted: \(id)")
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} catch let failure as Failure { throw failure }
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catch {}
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}
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let native = Task {
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try await YouTubeResolver.resolveTitle(URL(string: "https://youtu.be/CancelledAA")!, configuration: configuration)
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}
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var started = TitleProtocol.stalled.stream.makeAsyncIterator()
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_ = await started.next()
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native.cancel()
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do {
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_ = try await native.value
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throw Failure(description: "FAIL: cancelled oEmbed request returned a title")
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} catch let failure as Failure { throw failure }
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catch {
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try require(error is CancellationError || (error as? URLError)?.code == .cancelled,
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"native oEmbed cancellation ends its request without a title")
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}
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try require(try YouTubeResolver.decodeTitle(Data(#"{"title":" Metadata only ","formats":"ignored"}"#.utf8)) == "Metadata only",
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"title decoding does not require or interpret playback formats")
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try require(try YouTubeResolver.decodeTitle(Data(#"{"title":" "}"#.utf8)) == nil, "empty title retains fallback")
|
|
for json in [#"{"_type":"playlist","title":"Collection"}"#, #"{"title":"bad\u0000title"}"#, #"{"title":42}"#] {
|
|
try reject("unsafe, collection or malformed title") { _ = try YouTubeResolver.decodeTitle(Data(json.utf8)) }
|
|
}
|
|
let generic = URL(string: "https://video.example/watch?id=123")!
|
|
let extractor = try Extractor(root: root, name: "title only", json: #"{"title":"Generic title"}"#, body: #"""
|
|
printf '%s\n' "$@" > "$base/arguments"
|
|
/bin/cat "$base/response.json"
|
|
"""#)
|
|
let title = try await YouTubeResolver.resolveTitle(generic, executableURL: extractor.executable)
|
|
let arguments = try String(contentsOf: extractor.marker("arguments"), encoding: .utf8)
|
|
.split(separator: "\n").map(String.init)
|
|
try require(title == "Generic title" && arguments.suffix(2) == ["--", generic.absoluteString] &&
|
|
arguments.contains("--ignore-config") && arguments.contains("--no-plugin-dirs") &&
|
|
arguments.contains("--no-remote-components") && arguments.contains("--flat-playlist") &&
|
|
arguments.contains("--skip-download") && arguments.contains("--ignore-no-formats-error") &&
|
|
arguments.contains("--no-js-runtimes") && !arguments.contains("--js-runtimes") &&
|
|
!arguments.contains("--format"), "generic title extraction is isolated from full playback format/runtime policy")
|
|
do {
|
|
_ = try await YouTubeResolver.resolveTitle(URL(string: "https://user:password@video.example/")!,
|
|
executableURL: extractor.executable)
|
|
throw Failure(description: "FAIL: title lookup accepted embedded credentials")
|
|
} catch let failure as Failure { throw failure }
|
|
catch {}
|
|
let waiting = try Extractor(root: root, name: "cancel title", body: #"""
|
|
trap '' TERM INT
|
|
: > "$base/ready"
|
|
while [ ! -f "$base/release" ]; do /bin/sleep 0.01; done
|
|
/bin/cat "$base/response.json"
|
|
"""#)
|
|
let task = Task { try await YouTubeResolver.resolveTitle(generic, executableURL: waiting.executable) }
|
|
try await awaitMarker(waiting, "ready")
|
|
task.cancel()
|
|
try await cancelled(task, "title-only subprocess cancellation")
|
|
}
|
|
|
|
static func subprocesses(root: URL, runtime: URL) async throws {
|
|
let successful = try Extractor(root: root, name: "successful split")
|
|
let result = try await YouTubeResolver.resolve(page, executableURL: successful.executable, runtimeURL: runtime)
|
|
try require(result.video.url == "https://media.example/video?token=video"
|
|
&& result.audio?.url == "https://media.example/audio?token=audio"
|
|
&& result.title == "Separate streams" && result.duration == 19.25,
|
|
"actual subprocess output becomes usable separate media inputs")
|
|
|
|
let denied = try Extractor(root: root, name: "denied", body: #"""
|
|
/bin/cat "$base/response.json"
|
|
printf '%s\n' 'ERROR: Sign in to confirm your age: https://media.example/private?secret=not-for-errors' >&2
|
|
exit 17
|
|
"""#)
|
|
do {
|
|
_ = try await YouTubeResolver.resolve(page, executableURL: denied.executable, runtimeURL: runtime)
|
|
throw Failure(description: "FAIL: failed extractor returned media despite its exit status")
|
|
} catch let failure as Failure { throw failure }
|
|
catch {
|
|
let text = String(describing: error) + error.localizedDescription
|
|
try require(!text.contains("not-for-errors") && !text.contains("media.example"),
|
|
"extractor error does not leak signed media URLs or credentials")
|
|
}
|
|
|
|
let noisy = try Extractor(root: root, name: "pipe boundaries", body: #"""
|
|
/bin/dd if=/dev/zero bs=1024 count=512 2>/dev/null | /usr/bin/tr '\000' x >&2
|
|
/bin/dd if=/dev/zero bs=1024 count=512 2>/dev/null | /usr/bin/tr '\000' ' '
|
|
/bin/cat "$base/response.json"
|
|
"""#)
|
|
let drained = try await YouTubeResolver.resolve(page, executableURL: noisy.executable, runtimeURL: runtime)
|
|
try require(drained.audio?.url == result.audio?.url && drained.video.url == result.video.url,
|
|
"stderr beyond its capture boundary and stdout beyond pipe capacity drain without deadlock")
|
|
|
|
let oversized = try Extractor(root: root, name: "oversized stdout", body: #"""
|
|
/bin/dd if=/dev/zero bs=1024 count=17408 2>/dev/null | /usr/bin/tr '\000' ' '
|
|
/bin/cat "$base/response.json"
|
|
"""#)
|
|
do {
|
|
_ = try await YouTubeResolver.resolve(page, executableURL: oversized.executable, runtimeURL: runtime)
|
|
throw Failure(description: "FAIL: oversized extractor output was accepted")
|
|
} catch let failure as Failure { throw failure }
|
|
catch {}
|
|
|
|
let beforeLaunch = try Extractor(root: root, name: "already cancelled")
|
|
let preCancelled = Task {
|
|
withUnsafeCurrentTask { $0?.cancel() }
|
|
return try await YouTubeResolver.resolve(page, executableURL: beforeLaunch.executable, runtimeURL: runtime)
|
|
}
|
|
try await cancelled(preCancelled, "cancellation before launch")
|
|
try require(!FileManager.default.fileExists(atPath: beforeLaunch.marker("started").path),
|
|
"a pre-cancelled request never starts the dependency")
|
|
|
|
let waitingScript = #"""
|
|
trap '' TERM INT
|
|
printf '%s\n' "$$" > "$base/pid"
|
|
: > "$base/ready"
|
|
while [ ! -f "$base/release" ]; do /bin/sleep 0.01; done
|
|
/bin/cat "$base/response.json"
|
|
"""#
|
|
let old = try Extractor(root: root, name: "old request", body: waitingScript)
|
|
let newer = try Extractor(root: root, name: "new request", json: combinedJSON, body: waitingScript)
|
|
let oldTask = Task { try await YouTubeResolver.resolve(page, executableURL: old.executable, runtimeURL: runtime) }
|
|
defer { oldTask.cancel() }
|
|
try await awaitMarker(old, "ready")
|
|
let newTask = Task { try await YouTubeResolver.resolve(page, executableURL: newer.executable, runtimeURL: runtime) }
|
|
defer { newTask.cancel() }
|
|
try await awaitMarker(newer, "ready")
|
|
oldTask.cancel()
|
|
try await cancelled(oldTask, "in-flight cancellation")
|
|
let oldPID = try String(contentsOf: old.marker("pid"), encoding: .utf8)
|
|
.trimmingCharacters(in: .whitespacesAndNewlines)
|
|
try require(pid_t(oldPID).map { Darwin.kill($0, 0) == -1 && errno == ESRCH } == true,
|
|
"cancelled extractor is reaped even when it ignores termination")
|
|
oldTask.cancel()
|
|
try Data().write(to: newer.marker("release"))
|
|
let newResult = try await newTask.value
|
|
try require(newResult.title == "Combined stream" && newResult.audio == nil
|
|
&& newResult.video.url == "https://media.example/combined",
|
|
"cancelling an old request cannot terminate or replace a newer resolution")
|
|
}
|
|
|
|
static func actualQualitySelection(root: URL, runtime: URL) async throws {
|
|
let executable: URL
|
|
if CommandLine.arguments.count > 1 {
|
|
let app = URL(fileURLWithPath: CommandLine.arguments[1], isDirectory: true)
|
|
guard let bundled = try YouTubeResolver.bundledExecutable("yt-dlp", bundleURL: app) else {
|
|
throw Failure(description: "FAIL: supplied quality-selection app is not an app bundle")
|
|
}
|
|
executable = bundled
|
|
} else {
|
|
let directories = (ProcessInfo.processInfo.environment["PATH"] ?? "").split(separator: ":").map(String.init)
|
|
guard let found = directories.map({ URL(fileURLWithPath: $0).appendingPathComponent("yt-dlp") })
|
|
.first(where: { FileManager.default.isExecutableFile(atPath: $0.path) }) else {
|
|
print("Skipping actual yt-dlp quality selection: no bundled app supplied and yt-dlp is not on PATH")
|
|
return
|
|
}
|
|
executable = found
|
|
}
|
|
func video(_ height: Int, combined: Bool = false) -> [String: Any] {
|
|
["format_id": "\(height)", "height": height, "width": height * 16 / 9, "ext": "mp4",
|
|
"vcodec": "h264", "acodec": combined ? "aac" : "none", "dynamic_range": "SDR",
|
|
"protocol": "https", "url": "https://media.example/\(height).mp4", "preference": height == 720 ? 100 : 0]
|
|
}
|
|
var object: [String: Any] = [
|
|
"id": "jNQXAC9IVRw", "title": "Quality ordering", "duration": 12,
|
|
"webpage_url": page.absoluteString, "extractor": "youtube", "extractor_key": "Youtube",
|
|
"formats": [video(2160), video(1080, combined: true), video(720),
|
|
["format_id": "audio", "ext": "m4a", "vcodec": "none", "acodec": "aac",
|
|
"protocol": "https", "url": "https://media.example/audio.m4a"]]
|
|
]
|
|
let extractor = try Extractor(root: root, name: "actual quality selection")
|
|
let quotedExecutable = "'" + executable.path.replacingOccurrences(of: "'", with: "'\\''") + "'"
|
|
let script = """
|
|
#!/bin/bash
|
|
set -eu
|
|
base=${0%/*}
|
|
args=("$@")
|
|
exec \(quotedExecutable) --load-info-json "$base/response.json" "${args[@]:0:${#args[@]}-2}"
|
|
"""
|
|
try Data(script.utf8).write(to: extractor.executable)
|
|
try JSONSerialization.data(withJSONObject: object).write(to: extractor.marker("response.json"))
|
|
let normal = try await YouTubeResolver.resolve(page, executableURL: extractor.executable, runtimeURL: runtime)
|
|
try require(normal.height == 1080 && normal.audio == nil, "1080p combined video wins over preferred 720p and capped-out 4K")
|
|
let high = try await YouTubeResolver.resolve(page, height: 2160, executableURL: extractor.executable, runtimeURL: runtime)
|
|
try require(high.height == 2160 && high.audio != nil, "explicit 4K selects the higher video with separate audio")
|
|
var formats = object["formats"] as! [[String: Any]]
|
|
formats.removeAll { ($0["height"] as? Int) == 1080 }
|
|
object["formats"] = formats
|
|
try JSONSerialization.data(withJSONObject: object).write(to: extractor.marker("response.json"))
|
|
let lower = try await YouTubeResolver.resolve(page, executableURL: extractor.executable, runtimeURL: runtime)
|
|
try require(lower.height == 720, "default falls downward when 1080p is absent, never upward to available 4K")
|
|
let genericPage = URL(string: "https://video.example/watch?id=123")!
|
|
let generic: [String: Any] = [
|
|
"id": "123", "title": "Generic HTML5 video", "webpage_url": genericPage.absoluteString,
|
|
"extractor": "generic", "extractor_key": "Generic",
|
|
"formats": [["format_id": "0", "url": "https://media.example/unknown.mp4",
|
|
"ext": "mp4", "protocol": "https"]]
|
|
]
|
|
try JSONSerialization.data(withJSONObject: generic).write(to: extractor.marker("response.json"))
|
|
let unknown = try await YouTubeResolver.resolve(genericPage, executableURL: extractor.executable, runtimeURL: runtime)
|
|
try require(unknown.video.url == "https://media.example/unknown.mp4" &&
|
|
unknown.audio == nil && unknown.height == nil && unknown.webpageURL == genericPage,
|
|
"generic HTML5 video without codec or height hints remains playable and retains page identity")
|
|
let metadataOnly: [String: Any] = ["id": "123", "title": "Title without playable formats",
|
|
"webpage_url": genericPage.absoluteString, "extractor": "generic", "extractor_key": "Generic",
|
|
"formats": []]
|
|
try JSONSerialization.data(withJSONObject: metadataOnly).write(to: extractor.marker("response.json"))
|
|
let title = try await YouTubeResolver.resolveTitle(genericPage, executableURL: extractor.executable)
|
|
try require(title == "Title without playable formats", "bundled yt-dlp returns title metadata without playable formats or runtime")
|
|
}
|
|
|
|
static func bundledHelpers(root: URL) throws {
|
|
let app = root.appendingPathComponent("relocated player.app", isDirectory: true)
|
|
let macOS = app.appendingPathComponent("Contents/MacOS", isDirectory: true)
|
|
try FileManager.default.createDirectory(at: macOS, withIntermediateDirectories: true)
|
|
let external = root.appendingPathComponent("yt-dlp")
|
|
try Data("#!/bin/sh\nexit 99\n".utf8).write(to: external)
|
|
try FileManager.default.setAttributes([.posixPermissions: 0o700], ofItemAtPath: external.path)
|
|
let oldPath = ProcessInfo.processInfo.environment["PATH"]
|
|
defer {
|
|
if let oldPath { setenv("PATH", oldPath, 1) } else { unsetenv("PATH") }
|
|
}
|
|
for name in ["yt-dlp", "deno"] {
|
|
for path in [root.path, ""] {
|
|
setenv("PATH", path, 1)
|
|
try reject("missing bundled helper cannot fall back to hostile or missing PATH") {
|
|
_ = try YouTubeResolver.bundledExecutable(name, bundleURL: app)
|
|
}
|
|
}
|
|
let helper = macOS.appendingPathComponent(name)
|
|
try Data("#!/bin/sh\nexit 0\n".utf8).write(to: helper)
|
|
try FileManager.default.setAttributes([.posixPermissions: 0o600], ofItemAtPath: helper.path)
|
|
try reject("nonexecutable bundled helper") {
|
|
_ = try YouTubeResolver.bundledExecutable(name, bundleURL: app)
|
|
}
|
|
try FileManager.default.setAttributes([.posixPermissions: 0o700], ofItemAtPath: helper.path)
|
|
try require(try YouTubeResolver.bundledExecutable(name, bundleURL: app) == helper,
|
|
"bundled helper location survives relocation independently of PATH")
|
|
}
|
|
try require(try YouTubeResolver.bundledExecutable("yt-dlp", bundleURL: root) == nil,
|
|
"standalone development executables can use PATH discovery")
|
|
}
|
|
|
|
static func main() async throws {
|
|
// Includes five cold starts of the bundled extractor against offline metadata.
|
|
let watchdog = Task {
|
|
try await Task.sleep(for: .seconds(45))
|
|
fatalError("FAIL: resolver checks exceeded their bounded subprocess deadline")
|
|
}
|
|
defer { watchdog.cancel() }
|
|
let root = FileManager.default.temporaryDirectory
|
|
.appendingPathComponent("terebi resolver checks '\(UUID().uuidString)", isDirectory: true)
|
|
try FileManager.default.createDirectory(at: root, withIntermediateDirectories: false)
|
|
defer { try? FileManager.default.removeItem(at: root) }
|
|
let runtime = root.appendingPathComponent("deno")
|
|
try FileManager.default.createSymbolicLink(at: runtime, withDestinationURL: URL(fileURLWithPath: "/usr/bin/true"))
|
|
try videoURLs()
|
|
try metadata()
|
|
try malformedMetadata()
|
|
try qualities()
|
|
try bundledHelpers(root: root)
|
|
try await subprocesses(root: root, runtime: runtime)
|
|
print("PASS: extractor subprocess isolation and cancellation")
|
|
fflush(stdout)
|
|
try await titles(root: root)
|
|
print("PASS: independent native YouTube and generic title resolution")
|
|
fflush(stdout)
|
|
try await actualQualitySelection(root: root, runtime: runtime)
|
|
print("YouTube resolver checks passed")
|
|
}
|
|
}
|