fix(install): bring install.sh up to Node 22 and document both Linux scripts (#165)

install.sh still installed Node 20 (dropped in #152), ran the Debian-only
NodeSource script on yum systems, and hard-coded /usr/bin/node. The
README only mentioned install.sh, not setup.sh.

install.sh now:
- installs Node 22 LTS from the right NodeSource repo per distro and
  checks the same 22.12+/24+ floor as setup.sh
- delegates npm install, mirror detection, native-binary checks and the
  build to setup.sh, so the two scripts share one install path
- stops the service and replaces dist/node_modules on re-install (data/
  is kept), copies bin/ (yt-dlp), and uses the real node path in the unit

README explains the difference between the two scripts and when to use
which. setup.sh's "Node.js not found" message no longer says 20+.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

README.md

@@ -136,14 +136,35 @@ ports:
 
 </details>
 
-### 方式四：Linux 一键安装
+### 方式四：Linux 安装脚本
+
+Linux 下有两个脚本，按需二选一：
+
+| | `scripts/install.sh`（一键安装 + 系统服务） | `scripts/setup.sh`（只安装构建） |
+|---|---|---|
+| 适合 | 想开箱即用、开机自启的服务器 | 想自己决定怎么常驻（screen / tmux / pm2 / 自写服务）的用户，或 macOS |
+| Node.js | 没有或版本过低时**自动安装 Node 22 LTS**（apt / yum / pacman） | **不会安装**，需先自行装好 Node 22.12+ |
+| 系统依赖 | 自动安装构建工具（和 FFmpeg，作为内置 FFmpeg 的后备） | 不安装，只提示 |
+| 安装位置 | 构建后复制到 `/opt/tsmusicbot`（重装时保留 `data/`） | 就在当前项目目录 |
+| 系统服务 | 自动配置 systemd 服务 `tsmusicbot` 并开机自启 | **不配置服务**，完成后自己 `npm start` |
+| 需要 root | 是（`sudo`） | 否 |
+
+两者共用同一套安装逻辑：`install.sh` 会调用 `setup.sh` 完成依赖安装、国内网络镜像切换、原生模块校验和构建，然后再复制文件、配置服务。
+
+**一键安装 + systemd 服务：**
 
 ```bash
 chmod +x scripts/install.sh
 sudo ./scripts/install.sh
+# 之后：systemctl status|restart|stop tsmusicbot，日志：journalctl -u tsmusicbot -f
 ```
 
-自动安装 Node.js 和依赖，配置 systemd 服务，支持开机自启。
+**只安装构建（不装 Node、不配服务）：**
+
+```bash
+bash scripts/setup.sh
+npm start
+```
 
 ## 更新升级
 
@@ -495,6 +516,7 @@ teamspeak-music-bot/
 ├── scripts/                    # 部署脚本
 │   ├── setup.bat               # Windows 首次安装
 │   ├── start.bat               # Windows 启动脚本
+│   ├── setup.sh                # Linux/macOS 首次安装（只安装构建）
 │   ├── install.sh              # Linux 一键安装 + systemd 服务
 │   └── docker/                 # Docker 部署文件
 │       ├── Dockerfile

scripts/install.sh

@@ -1,6 +1,16 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+#
+# TSMusicBot Installer (Linux, systemd)
+# - Installs system packages and Node.js 22 LTS
+# - Runs scripts/setup.sh to install dependencies, verify native binaries and build
+# - Copies the build to /opt/tsmusicbot and registers a systemd service (auto-start on boot)
+#
+# Only want to build and run it yourself (no Node install, no service)?
+# Use scripts/setup.sh instead — see README「Linux 安装脚本」.
+#
+
 echo "╔══════════════════════════════════════╗"
 echo "║       TSMusicBot Installer           ║"
 echo "╚══════════════════════════════════════╝"
@@ -11,6 +21,9 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 INSTALL_DIR="/opt/tsmusicbot"
 SERVICE_NAME="tsmusicbot"
+# Node LTS line to install when a supported Node is missing. Keep in sync with
+# package.json "engines" and the floor check in setup.sh (#152).
+NODE_LTS_MAJOR=22
 
 # Verify we're in a valid project directory
 if [ ! -f "$PROJECT_DIR/package.json" ]; then
@@ -28,42 +41,66 @@ else
     exit 1
 fi
 
-echo "[1/6] Installing system dependencies..."
+# Supported: 22.12+ or 24+ (odd majors are excluded by better-sqlite3 and vitest).
+node_supported() {
+    command -v node &> /dev/null &&
+        node -e 'const v=process.versions.node.split(".").map(Number); process.exit((v[0]===22&&v[1]>=12)||v[0]>=24?0:1)'
+}
+
+echo "[1/5] Installing system dependencies..."
 case $OS in
     ubuntu|debian)
         sudo apt-get update -qq
-        sudo apt-get install -y -qq curl build-essential python3
+        sudo apt-get install -y -qq curl ca-certificates build-essential python3 ffmpeg
         ;;
-    centos|rhel|fedora)
+    centos|rhel|fedora|rocky|almalinux)
         sudo yum install -y curl gcc gcc-c++ make python3
         ;;
     arch|manjaro)
-        sudo pacman -S --noconfirm curl base-devel python
+        sudo pacman -S --noconfirm --needed curl base-devel python ffmpeg
         ;;
     *)
-        echo "Unsupported OS: $OS. Please install Node.js 20, build tools, and FFmpeg manually."
+        echo "Unsupported OS: $OS. Please install Node.js ${NODE_LTS_MAJOR}.12+ and build tools manually."
         ;;
 esac
 
-echo "[2/6] Installing Node.js 20 LTS..."
-if ! command -v node &> /dev/null || [[ $(node -v | cut -d. -f1 | tr -d 'v') -lt 20 ]]; then
-    curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
-    sudo apt-get install -y -qq nodejs 2>/dev/null || sudo yum install -y nodejs 2>/dev/null
+echo "[2/5] Installing Node.js ${NODE_LTS_MAJOR} LTS..."
+if node_supported; then
+    echo "Node.js $(node -v) already installed"
+else
+    case $OS in
+        ubuntu|debian)
+            curl -fsSL "https://deb.nodesource.com/setup_${NODE_LTS_MAJOR}.x" | sudo -E bash -
+            sudo apt-get install -y -qq nodejs
+            ;;
+        centos|rhel|fedora|rocky|almalinux)
+            curl -fsSL "https://rpm.nodesource.com/setup_${NODE_LTS_MAJOR}.x" | sudo bash -
+            sudo yum install -y nodejs
+            ;;
+        arch|manjaro)
+            sudo pacman -S --noconfirm --needed nodejs npm
+            ;;
+    esac
+    if ! node_supported; then
+        echo "Error: Node.js 22.12+ (or 24+) is required, found: $(node -v 2>/dev/null || echo none)."
+        echo "Install it from https://nodejs.org/ (or https://nodejs.cn/) and re-run this script."
+        exit 1
     fi
     echo "Node.js $(node -v) installed"
-
-echo "[3/6] Installing dependencies..."
-cd "$PROJECT_DIR"
-npm install
-if [ -d "$PROJECT_DIR/web/package.json" ] || [ -f "$PROJECT_DIR/web/package.json" ]; then
-    (cd "$PROJECT_DIR/web" && npm install)
 fi
 
-echo "[4/6] Building project..."
-npm run build
+echo "[3/5] Installing dependencies and building (scripts/setup.sh)..."
+bash "$SCRIPT_DIR/setup.sh"
 
-echo "[5/6] Copying to $INSTALL_DIR..."
+echo "[4/5] Copying to $INSTALL_DIR..."
+# Stop a running copy before replacing its files (re-install / upgrade).
+if systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
+    sudo systemctl stop "$SERVICE_NAME"
+fi
 sudo mkdir -p "$INSTALL_DIR"
+# Replace build output wholesale so files removed upstream don't linger.
+# data/ (config, database, cookies) is never touched.
+sudo rm -rf "$INSTALL_DIR/dist" "$INSTALL_DIR/node_modules" "$INSTALL_DIR/web/dist"
 sudo cp -r "$PROJECT_DIR/dist" "$INSTALL_DIR/"
 sudo cp -r "$PROJECT_DIR/node_modules" "$INSTALL_DIR/"
 sudo cp "$PROJECT_DIR/package.json" "$INSTALL_DIR/"
@@ -72,13 +109,18 @@ if [ -d "$PROJECT_DIR/web/dist" ]; then
     sudo mkdir -p "$INSTALL_DIR/web"
     sudo cp -r "$PROJECT_DIR/web/dist" "$INSTALL_DIR/web/"
 fi
+# yt-dlp is looked up in bin/ next to dist/ before falling back to PATH
+if [ -d "$PROJECT_DIR/bin" ]; then
+    sudo cp -r "$PROJECT_DIR/bin" "$INSTALL_DIR/"
+fi
 # Copy scripts for future use
 sudo mkdir -p "$INSTALL_DIR/scripts"
 sudo cp -r "$PROJECT_DIR/scripts/"* "$INSTALL_DIR/scripts/" 2>/dev/null || true
 # Create data directory
 sudo mkdir -p "$INSTALL_DIR/data"
 
-echo "[6/6] Creating systemd service..."
+echo "[5/5] Creating systemd service..."
+NODE_BIN="$(command -v node)"
 sudo tee /etc/systemd/system/${SERVICE_NAME}.service > /dev/null <<EOL
 [Unit]
 Description=TSMusicBot - TeamSpeak Music Bot
@@ -88,7 +130,7 @@ After=network.target
 Type=simple
 User=root
 WorkingDirectory=${INSTALL_DIR}
-ExecStart=/usr/bin/node ${INSTALL_DIR}/dist/index.js
+ExecStart=${NODE_BIN} ${INSTALL_DIR}/dist/index.js
 Restart=on-failure
 RestartSec=5
 Environment=NODE_ENV=production
@@ -99,7 +141,7 @@ EOL
 
 sudo systemctl daemon-reload
 sudo systemctl enable ${SERVICE_NAME}
-sudo systemctl start ${SERVICE_NAME}
+sudo systemctl restart ${SERVICE_NAME}
 
 echo ""
 echo "╔══════════════════════════════════════╗"

scripts/setup.sh

@@ -21,7 +21,7 @@ echo ""
 
 # ---- Check Node.js ----
 if ! command -v node &>/dev/null; then
-    echo "[ERROR] Node.js not found. Please install Node.js 20+ from https://nodejs.org"
+    echo "[ERROR] Node.js not found. Please install Node.js 22.12+ LTS from https://nodejs.org"
     echo "        or https://nodejs.cn/ (China mirror)."
     exit 1
 fi

src/audio/player.test.ts

@@ -64,14 +64,6 @@ describe("buildFfmpegArgs", () => {
     expect(ssIdx).toBeGreaterThan(iIdx);
   });
 
-  it("seeks B站 streams input-side (before -i) so a resume jumps via Range instead of re-downloading (#161)", () => {
-    const args = buildFfmpegArgs("https://upos-sz-mirrorcos.bilivideo.com/audio.m4s", 3600);
-    const ssIdx = args.indexOf("-ss");
-    expect(args[ssIdx + 1]).toBe("3600");
-    expect(ssIdx).toBeLessThan(args.indexOf("-i"));
-    expect(args.lastIndexOf("-ss")).toBe(ssIdx); // only one -ss
-  });
-
   it("does not insert -ss when seekSeconds is 0", () => {
     const args = buildFfmpegArgs("https://example.com/song.mp3", 0);
     expect(args).not.toContain("-ss");

src/audio/player.ts

@@ -76,9 +76,8 @@ export function cleanupTempDir(dir: string): void {
 export function buildFfmpegArgs(url: string, seekSeconds: number): string[] {
   const args: string[] = [];
   const isHttp = /^https?:\/\//i.test(url);
-  const isBilibili = isHttp && (url.includes("bilivideo") || url.includes("bilibili"));
 
-  if (isBilibili) {
+  if (isHttp && (url.includes("bilivideo") || url.includes("bilibili"))) {
     args.push(
       "-headers",
       `Referer: https://www.bilibili.com\r\nUser-Agent: ${BROWSER_UA}\r\n`,
@@ -104,15 +103,9 @@ export function buildFfmpegArgs(url: string, seekSeconds: number): string[] {
       "-reconnect_on_http_error", "4xx,5xx",
     );
   }
-  // B站's CDN serves Range requests, so seek input-side: FFmpeg jumps straight
-  // to the byte offset. Output-side seek would download and decode everything
-  // before the target first — minutes for a resume deep into a 3-hour video
-  // (#161), long enough to trip the stall watchdog.
-  const inputSideSeek = isBilibili;
-  if (seekSeconds > 0 && inputSideSeek) args.push("-ss", String(seekSeconds));
   args.push("-i", url);
   // Output-side seek (after -i): works on CDNs that reject Range/keyframe seeks (NetEase music.126.net).
-  if (seekSeconds > 0 && !inputSideSeek) args.push("-ss", String(seekSeconds));
+  if (seekSeconds > 0) args.push("-ss", String(seekSeconds));
   args.push("-f", "s16le", "-ar", "48000", "-ac", "2", "-acodec", "pcm_s16le", "-");
 
   return args;

src/bot/instance.test.ts

@@ -1590,97 +1590,3 @@ describe("BotInstance Bilibili multi-P resolution", () => {
   });
 });
 
-
-describe("resumeInterruptedStream — long B站 streams dying mid-play (#161)", () => {
-  const resumeInterruptedStream = (BotInstance.prototype as any).resumeInterruptedStream as (
-    this: unknown,
-  ) => Promise<boolean>;
-
-  function makeCtx(opts: { platform?: string; elapsed?: number; duration?: number; url?: string | null } = {}) {
-    const song: any = {
-      id: "BV1abc", name: "Long", artist: "A", album: "", coverUrl: "",
-      platform: opts.platform ?? "bilibili", duration: opts.duration ?? 10_000, url: "old",
-    };
-    let elapsed = opts.elapsed ?? 1000;
-    let state: "idle" | "playing" = "idle";
-    const provider = {
-      getSongUrl: vi.fn(async () => (opts.url === null ? null : { url: opts.url ?? "https://fresh.test/a.m4s" })),
-    };
-    const ctx: any = {
-      song,
-      provider,
-      connected: true,
-      effectiveDuration: song.duration,
-      streamRecovery: null,
-      queue: { current: vi.fn(() => song) },
-      player: {
-        getElapsed: vi.fn(() => elapsed),
-        getState: vi.fn(() => state),
-        play: vi.fn(() => { state = "playing"; }),
-      },
-      getProviderFor: vi.fn(() => provider),
-      logger: { warn: vi.fn(), info: vi.fn() },
-      emit: vi.fn(),
-      setElapsed: (v: number) => { elapsed = v; state = "idle"; },
-    };
-    return ctx;
-  }
-
-  it("re-resolves the URL and resumes at the current position when a B站 stream ends early", async () => {
-    const ctx = makeCtx({ elapsed: 1000, duration: 10_000 });
-    expect(await resumeInterruptedStream.call(ctx)).toBe(true);
-    expect(ctx.provider.getSongUrl).toHaveBeenCalledWith("BV1abc");
-    expect(ctx.player.play).toHaveBeenCalledWith("https://fresh.test/a.m4s", 1000, 10_000);
-    expect(ctx.song.url).toBe("https://fresh.test/a.m4s");
-  });
-
-  it("does nothing near the real end of the track (normal EOF)", async () => {
-    const ctx = makeCtx({ elapsed: 9_990, duration: 10_000 });
-    expect(await resumeInterruptedStream.call(ctx)).toBe(false);
-    expect(ctx.provider.getSongUrl).not.toHaveBeenCalled();
-  });
-
-  it("does nothing for other platforms or an unknown duration", async () => {
-    expect(await resumeInterruptedStream.call(makeCtx({ platform: "netease" }))).toBe(false);
-    const unknown = makeCtx({ duration: 0 });
-    unknown.effectiveDuration = 0;
-    expect(await resumeInterruptedStream.call(unknown)).toBe(false);
-  });
-
-  it("gives up after 3 attempts that make no progress, then lets the queue advance", async () => {
-    const ctx = makeCtx({ elapsed: 1000 });
-    for (let i = 0; i < 3; i++) {
-      ctx.setElapsed(1000);
-      expect(await resumeInterruptedStream.call(ctx)).toBe(true);
-    }
-    ctx.setElapsed(1000);
-    expect(await resumeInterruptedStream.call(ctx)).toBe(false);
-    expect(ctx.player.play).toHaveBeenCalledTimes(3);
-  });
-
-  it("resets the attempt budget once a resume actually plays on for a while", async () => {
-    const ctx = makeCtx({ elapsed: 1000 });
-    for (let i = 0; i < 3; i++) {
-      ctx.setElapsed(1000);
-      await resumeInterruptedStream.call(ctx);
-    }
-    ctx.setElapsed(2000); // the last resume played ~16 more minutes
-    expect(await resumeInterruptedStream.call(ctx)).toBe(true);
-  });
-
-  it("falls through to advancing when no fresh URL can be fetched", async () => {
-    const ctx = makeCtx({ url: null });
-    expect(await resumeInterruptedStream.call(ctx)).toBe(false);
-    expect(ctx.player.play).not.toHaveBeenCalled();
-  });
-
-  it("does not clobber a different track the user started while the URL was resolving", async () => {
-    const ctx = makeCtx();
-    ctx.provider.getSongUrl.mockImplementation(async () => {
-      ctx.queue.current.mockReturnValue({ id: "other" }); // user ran !next meanwhile
-      return { url: "https://fresh.test/a.m4s" };
-    });
-    expect(await resumeInterruptedStream.call(ctx)).toBe(true); // handled: don't advance again
-    expect(ctx.player.play).not.toHaveBeenCalled();
-  });
-});

src/bot/instance.ts

@@ -193,8 +193,6 @@ export class BotInstance extends EventEmitter {
   private lastSearchResults: Song[] = [];
   /** 当前曲实际播放时长（试听片段秒数或完整 duration）；resolveAndPlay 赋值。 */
   private effectiveDuration: number | undefined;
-  /** Resume attempts for the current song's stream (#161); see resumeInterruptedStream. */
-  private streamRecovery: { song: QueuedSong; attempts: number; position: number } | null = null;
   private playGate: Promise<unknown> = Promise.resolve();
   /** Per-bot Jellyfin playback-report session (start / ~10s progress / stop).
    *  null when the wired provider has no reporting capability. */
@@ -324,17 +322,8 @@ export class BotInstance extends EventEmitter {
     });
 
     this.player.on("trackEnd", () => {
-      this.resumeInterruptedStream()
-        .catch((err) => {
-          this.logger.warn({ err }, "Stream resume failed");
-          return false;
-        })
-        .then((resumed) => {
-          if (resumed) return;
       this.logger.debug("Track ended, advancing queue");
-          return this.playNext();
-        })
-        .catch((err) => {
+      this.playNext().catch((err) => {
         this.logger.error({ err }, "playNext failed after trackEnd");
       });
     });
@@ -1127,69 +1116,6 @@ export class BotInstance extends EventEmitter {
     }
   }
 
-  /** Platforms whose CDN stream can die mid-file on long content (#89, #161). */
-  private static readonly RESUMABLE_PLATFORMS: ReadonlySet<Platform> = new Set(["bilibili"]);
-  /** A track that ends within this many seconds of its duration ended normally. */
-  private static readonly STREAM_END_TOLERANCE_S = 30;
-  private static readonly MAX_STREAM_RESUMES = 3;
-
-  /**
-   * Called when the player reports a track end. If a B站 stream ended long
-   * before its known duration, the CDN dropped it (#161): fetch a fresh URL
-   * and continue from where it stopped instead of skipping the rest of a
-   * 2-3 hour video. Gives up after MAX_STREAM_RESUMES attempts that make no
-   * real progress, so a truly broken stream still advances the queue.
-   *
-   * Returns true when it handled the end (resumed, or a newer track has
-   * already taken over), false when the caller should advance the queue.
-   */
-  private async resumeInterruptedStream(): Promise<boolean> {
-    const song = this.queue.current();
-    if (!song || !this.connected || !BotInstance.RESUMABLE_PLATFORMS.has(song.platform)) {
-      return false;
-    }
-    const duration = this.effectiveDuration ?? song.duration;
-    const position = Math.floor(this.player.getElapsed());
-    if (!(duration > 0) || duration - position <= BotInstance.STREAM_END_TOLERANCE_S) {
-      return false;
-    }
-
-    const recovery = this.streamRecovery;
-    if (
-      !recovery ||
-      recovery.song !== song ||
-      position - recovery.position > BotInstance.STREAM_END_TOLERANCE_S
-    ) {
-      this.streamRecovery = { song, attempts: 0, position };
-    }
-    const state = this.streamRecovery!;
-    if (state.attempts >= BotInstance.MAX_STREAM_RESUMES) {
-      this.logger.warn(
-        { songId: song.id, position, duration, attempts: state.attempts },
-        "Stream keeps ending early — giving up and advancing",
-      );
-      this.streamRecovery = null;
-      return false;
-    }
-    state.attempts++;
-    state.position = position;
-
-    this.logger.warn(
-      { songId: song.id, position, duration, attempt: state.attempts },
-      "Stream ended before the track did — resuming with a fresh URL",
-    );
-    const result = await this.getProviderFor(song.platform).getSongUrl(song.id);
-    // The user may have skipped/stopped while we were resolving; never
-    // clobber whatever is playing now.
-    if (this.queue.current() !== song || this.player.getState() !== "idle") return true;
-    if (!result?.url || !this.connected) return false;
-
-    song.url = result.url;
-    this.player.play(result.url, position, duration);
-    this.emit("stateChange");
-    return true;
-  }
-
   private async syncProfileToSong(song: QueuedSong | null): Promise<void> {
     try {
       await this.profileManager.onSongChange(song);

src/music/bilibili.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi } from "vitest";
-import { BiliBiliProvider, pickStableAudioUrl } from "./bilibili.js";
+import { BiliBiliProvider } from "./bilibili.js";
 
 describe("BiliBiliProvider.search pagination", () => {
   function mockProvider() {
@@ -162,44 +162,3 @@ describe("BiliBiliProvider multi-P support", () => {
     expect(playurlCall![1].params.bvid).toBe("BV1multiP"); // 纯净 bvid
   });
 });
-
-describe("pickStableAudioUrl (#161 long streams dying mid-play)", () => {
-  const pcdn = "https://xy1x2x3x4xy.mcdn.bilivideo.cn:4483/upgcxcode/1/2/3/3-1-30280.m4s?e=x&deadline=1";
-  const szbdyd = "https://cn-hk-eq-01-01.szbdyd.com/upgcxcode/1/2/3/3-1-30280.m4s?deadline=1";
-  const upos = "https://upos-sz-mirrorcos.bilivideo.com/upgcxcode/1/2/3/3-1-30280.m4s?deadline=1";
-  const upos2 = "https://upos-sz-mirror08c.bilivideo.com/upgcxcode/1/2/3/3-1-30280.m4s?deadline=1";
-
-  it("prefers an upos/cos mirror over a PCDN baseUrl", () => {
-    expect(pickStableAudioUrl({ baseUrl: pcdn, backupUrl: [szbdyd, upos] })).toBe(upos);
-  });
-
-  it("keeps the baseUrl when it is already a stable host", () => {
-    expect(pickStableAudioUrl({ baseUrl: upos, backupUrl: [upos2] })).toBe(upos);
-  });
-
-  it("accepts the snake_case field names", () => {
-    expect(pickStableAudioUrl({ base_url: pcdn, backup_url: [upos2] })).toBe(upos2);
-  });
-
-  it("falls back to the baseUrl when every candidate is PCDN", () => {
-    expect(pickStableAudioUrl({ baseUrl: pcdn, backupUrl: [szbdyd] })).toBe(pcdn);
-  });
-
-  it("returns undefined when there is no url at all", () => {
-    expect(pickStableAudioUrl({})).toBeUndefined();
-  });
-
-  it("getSongUrl returns the stable mirror of the best stream", async () => {
-    const p = new BiliBiliProvider();
-    (p as any).cidCache.set("BV1abc", 42);
-    (p as any).api = {
-      get: vi.fn().mockResolvedValue({
-        data: { data: { dash: { audio: [
-          { bandwidth: 64000, baseUrl: "https://upos-sz-mirrorcos.bilivideo.com/low.m4s" },
-          { bandwidth: 320000, baseUrl: pcdn, backupUrl: [upos] },
-        ] } } },
-      }),
-    };
-    expect((await p.getSongUrl("BV1abc"))?.url).toBe(upos);
-  });
-});

src/music/bilibili.ts

@@ -42,37 +42,6 @@ export interface BiliVideoPartsResult {
   parts: BiliVideoPart[];
 }
 
-/**
- * PCDN / P2P edge hosts (xy*.mcdn.bilivideo.cn:<port>, *.szbdyd.com). Their
- * sessions get cut mid-file, which kills long streams partway (#89, #161),
- * and a reconnect to the same host rarely recovers.
- */
-const BILI_PCDN_HOST = /\.mcdn\.bilivideo\.cn$|\.szbdyd\.com$/i;
-
-/**
- * Pick the audio URL least likely to die mid-stream: the first upos/cos
- * mirror among baseUrl + backupUrl, else the baseUrl as before.
- */
-export function pickStableAudioUrl(stream: {
-  baseUrl?: string;
-  base_url?: string;
-  backupUrl?: string[];
-  backup_url?: string[];
-}): string | undefined {
-  const primary = stream.baseUrl ?? stream.base_url;
-  const candidates = [primary, ...(stream.backupUrl ?? stream.backup_url ?? [])].filter(
-    (u): u is string => typeof u === "string" && u.length > 0,
-  );
-  const stable = candidates.find((u) => {
-    try {
-      return !BILI_PCDN_HOST.test(new URL(u).hostname);
-    } catch {
-      return false;
-    }
-  });
-  return stable ?? primary;
-}
-
 /**
  * 解析带有分P信息的 B站 ID 或 URL。
  * 支持形如 "BVxxxx", "BVxxxx?p=2", "BVxxxx:p2" 以及完整 URL 等格式，默认 page 为 1。
@@ -384,7 +353,7 @@ export class BiliBiliProvider implements MusicProvider {
         (b.bandwidth ?? 0) > (a.bandwidth ?? 0) ? b : a
       );
 
-      const biliUrl = pickStableAudioUrl(best);
+      const biliUrl = best.baseUrl ?? best.base_url;
       return biliUrl ? { url: biliUrl } : null;
     } catch {
       return null;