rename to lrx

resolve conflicts

lrx/fetchers/__init__.py

@@ -0,0 +1,41 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-25 02:33:26
+Description: Fetcher pipeline — registry and types
+"""
+
+from typing import Literal
+
+from .base import BaseFetcher
+from .local import LocalFetcher
+from .cache_search import CacheSearchFetcher
+from .spotify import SpotifyFetcher
+from .lrclib import LrclibFetcher
+from .lrclib_search import LrclibSearchFetcher
+from .netease import NeteaseFetcher
+from .qqmusic import QQMusicFetcher
+from ..cache import CacheEngine
+
+FetcherMethodType = Literal[
+    "local",
+    "cache-search",
+    "spotify",
+    "lrclib",
+    "lrclib-search",
+    "netease",
+    "qqmusic",
+]
+
+
+def create_fetchers(cache: CacheEngine) -> dict[FetcherMethodType, BaseFetcher]:
+    """Instantiate all fetchers. Returns a dict keyed by source name."""
+    fetchers: dict[FetcherMethodType, BaseFetcher] = {
+        "local": LocalFetcher(),
+        "cache-search": CacheSearchFetcher(cache),
+        "spotify": SpotifyFetcher(),
+        "lrclib": LrclibFetcher(),
+        "lrclib-search": LrclibSearchFetcher(),
+        "netease": NeteaseFetcher(),
+        "qqmusic": QQMusicFetcher(),
+    }
+    return fetchers

lrx/fetchers/base.py

@@ -0,0 +1,35 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-25 02:33:26
+Description: Base fetcher class and common interfaces
+"""
+
+from abc import ABC, abstractmethod
+from typing import Optional
+
+from ..models import TrackMeta, LyricResult
+
+
+class BaseFetcher(ABC):
+    @property
+    @abstractmethod
+    def source_name(self) -> str:
+        """Name of the fetcher source."""
+        pass
+
+    @property
+    def self_cached(self) -> bool:
+        """True if this fetcher manages its own cache (skip per-source cache check)."""
+        return False
+
+    @abstractmethod
+    def is_available(self, track: TrackMeta) -> bool:
+        """Check if the fetcher is available for the given track (e.g. has required metadata)."""
+        pass
+
+    @abstractmethod
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Fetch lyrics for the given track. Returns None if unable to fetch."""
+        pass

lrx/fetchers/cache_search.py

@@ -0,0 +1,85 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-28 05:57:46
+Description: Cache-search fetcher — cross-album fuzzy lookup in the local cache
+"""
+
+"""
+Searches existing cache entries by artist + title with fuzzy normalization,
+ignoring album and source. Useful when the same track appears on different
+albums or is played from different players.
+"""
+
+from typing import Optional
+from loguru import logger
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult, CacheStatus
+from ..cache import CacheEngine
+
+
+class CacheSearchFetcher(BaseFetcher):
+    def __init__(self, cache: CacheEngine) -> None:
+        self._cache = cache
+
+    @property
+    def source_name(self) -> str:
+        return "cache-search"
+
+    @property
+    def self_cached(self) -> bool:
+        return True
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return bool(track.title)
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        if bypass_cache:
+            logger.debug("Cache-search: bypassed by caller")
+            return None
+
+        if not track.title:
+            logger.debug("Cache-search: skipped — no title")
+            return None
+
+        # Fast path: exact metadata match (artist+title+album), single SQL query
+        exact = self._cache.find_best_positive(track)
+        if exact:
+            logger.info(f"Cache-search: exact hit ({exact.status.value})")
+            return exact
+
+        # Slow path: fuzzy cross-album search
+        matches = self._cache.search_by_meta(
+            artist=track.artist,
+            title=track.title,
+            length=track.length,
+        )
+
+        if not matches:
+            logger.debug(f"Cache-search: no match for {track.display_name()}")
+            return None
+
+        # Pick best: prefer synced, then first available
+        best = None
+        for m in matches:
+            if m.get("status") == CacheStatus.SUCCESS_SYNCED.value:
+                best = m
+                break
+            if best is None:
+                best = m
+
+        if not best or not best.get("lyrics"):
+            return None
+
+        status = CacheStatus(best["status"])
+        logger.info(
+            f"Cache-search: fuzzy hit from [{best.get('source')}] "
+            f"album={best.get('album')!r} ({status.value})"
+        )
+        return LyricResult(
+            status=status,
+            lyrics=best["lyrics"],
+            source=self.source_name,
+        )

lrx/fetchers/local.py

@@ -0,0 +1,98 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-26 02:08:41
+Description: Local fetcher — reads lyrics from .lrc sidecar files or embedded audio metadata
+"""
+
+"""
+Priority:
+  1. Same-directory .lrc file (e.g. /path/to/track.lrc)
+  2. Embedded lyrics in audio metadata (FLAC, MP3 USLT/SYLT tags)
+"""
+
+from typing import Optional
+from loguru import logger
+from mutagen._file import File
+from mutagen.flac import FLAC
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult
+from ..lrc import detect_sync_status, normalize_tags, get_audio_path, get_sidecar_path
+
+
+class LocalFetcher(BaseFetcher):
+    @property
+    def source_name(self) -> str:
+        return "local"
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return track.is_local
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Attempt to read lyrics from local filesystem."""
+        if not track.is_local or not track.url:
+            return None
+
+        audio_path = get_audio_path(track.url, ensure_exists=False)
+        if not audio_path:
+            logger.debug(f"Local: audio URL is not a valid file path: {track.url}")
+            return None
+
+        lrc_path = get_sidecar_path(
+            track.url, ensure_audio_exists=False, ensure_exists=True
+        )
+        if lrc_path:
+            try:
+                with open(lrc_path, "r", encoding="utf-8") as f:
+                    content = f.read().strip()
+                if content:
+                    content = normalize_tags(content)
+                    status = detect_sync_status(content)
+                    logger.info(f"Local: found .lrc sidecar ({status.value})")
+                    return LyricResult(
+                        status=status, lyrics=content, source=self.source_name
+                    )
+            except Exception as e:
+                logger.error(f"Local: error reading {lrc_path}: {e}")
+        else:
+            logger.debug(f"Local: no .lrc sidecar found for {audio_path}")
+
+        # Embedded metadata
+        if not audio_path.exists():
+            logger.debug(f"Local: audio file does not exist: {audio_path}")
+            return None
+        try:
+            audio = File(audio_path)
+            if audio is not None:
+                lyrics = None
+
+                if isinstance(audio, FLAC):
+                    # FLAC stores lyrics in vorbis comment tags
+                    lyrics = (
+                        audio.get("lyrics") or audio.get("unsynclyrics") or [None]
+                    )[0]
+                elif hasattr(audio, "tags") and audio.tags:
+                    # MP3 / other: look for USLT or SYLT ID3 frames
+                    for key in audio.tags.keys():
+                        if key.startswith("USLT") or key.startswith("SYLT"):
+                            lyrics = str(audio.tags[key])
+                            break
+
+                if lyrics:
+                    lyrics = normalize_tags(lyrics.strip())
+                    status = detect_sync_status(lyrics)
+                    logger.info(f"Local: found embedded lyrics ({status.value})")
+                    return LyricResult(
+                        status=status,
+                        lyrics=lyrics,
+                        source=f"{self.source_name} (embedded)",
+                    )
+                else:
+                    logger.debug("Local: no embedded lyrics found")
+        except Exception as e:
+            logger.error(f"Local: error reading metadata for {audio_path}: {e}")
+
+        logger.debug(f"Local: no lyrics found for {audio_path}")
+        return None

lrx/fetchers/lrclib.py

@@ -0,0 +1,111 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-25 05:23:38
+Description: LRCLIB fetcher — queries lrclib.net for synced/plain lyrics
+"""
+
+"""
+Requires complete track metadata (artist, title, album, duration).
+"""
+
+from typing import Optional
+import httpx
+from loguru import logger
+from urllib.parse import urlencode
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult, CacheStatus
+from ..lrc import normalize_tags
+from ..config import (
+    HTTP_TIMEOUT,
+    TTL_UNSYNCED,
+    TTL_NOT_FOUND,
+    TTL_NETWORK_ERROR,
+    LRCLIB_API_URL,
+    UA_LRCFETCH,
+)
+
+
+class LrclibFetcher(BaseFetcher):
+    @property
+    def source_name(self) -> str:
+        return "lrclib"
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return track.is_complete
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Fetch lyrics from LRCLIB. Requires complete metadata."""
+        if not track.is_complete:
+            logger.debug("LRCLIB: skipped — incomplete metadata")
+            return None
+
+        params = {
+            "track_name": track.title,
+            "artist_name": track.artist,
+            "album_name": track.album,
+            "duration": track.length / 1000.0 if track.length else 0,
+        }
+
+        url = f"{LRCLIB_API_URL}?{urlencode(params)}"
+        logger.info(f"LRCLIB: fetching lyrics for {track.display_name()}")
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                resp = client.get(url, headers={"User-Agent": UA_LRCFETCH})
+
+            if resp.status_code == 404:
+                logger.debug(f"LRCLIB: not found for {track.display_name()}")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            if resp.status_code != 200:
+                logger.error(f"LRCLIB: API returned {resp.status_code}")
+                return LyricResult(
+                    status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                )
+
+            data = resp.json()
+
+            # Validate response
+            if not isinstance(data, dict):
+                logger.error(f"LRCLIB: unexpected response type: {type(data).__name__}")
+                return LyricResult(
+                    status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                )
+
+            synced = data.get("syncedLyrics")
+            unsynced = data.get("plainLyrics")
+
+            if isinstance(synced, str) and synced.strip():
+                lyrics = normalize_tags(synced.strip())
+                logger.info(
+                    f"LRCLIB: got synced lyrics ({len(lyrics.splitlines())} lines)"
+                )
+                return LyricResult(
+                    status=CacheStatus.SUCCESS_SYNCED,
+                    lyrics=lyrics,
+                    source=self.source_name,
+                )
+            elif isinstance(unsynced, str) and unsynced.strip():
+                lyrics = normalize_tags(unsynced.strip())
+                logger.info(
+                    f"LRCLIB: got unsynced lyrics ({len(lyrics.splitlines())} lines)"
+                )
+                return LyricResult(
+                    status=CacheStatus.SUCCESS_UNSYNCED,
+                    lyrics=lyrics,
+                    source=self.source_name,
+                    ttl=TTL_UNSYNCED,
+                )
+            else:
+                logger.debug(f"LRCLIB: empty response for {track.display_name()}")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+        except httpx.HTTPError as e:
+            logger.error(f"LRCLIB: HTTP error: {e}")
+            return LyricResult(status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR)
+        except Exception as e:
+            logger.error(f"LRCLIB: unexpected error: {e}")
+            return None

lrx/fetchers/lrclib_search.py

@@ -0,0 +1,168 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-25 05:30:50
+Description: LRCLIB search fetcher — fuzzy search via lrclib.net /api/search
+"""
+
+"""
+Used when metadata is incomplete (no album or duration) but title is available.
+Selects the best match by duration when track length is known.
+"""
+
+import httpx
+from typing import Optional
+from loguru import logger
+from urllib.parse import urlencode
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult, CacheStatus
+from ..lrc import normalize_tags
+from ..config import (
+    HTTP_TIMEOUT,
+    TTL_UNSYNCED,
+    TTL_NOT_FOUND,
+    TTL_NETWORK_ERROR,
+    DURATION_TOLERANCE_MS,
+    LRCLIB_SEARCH_URL,
+    UA_LRCFETCH,
+)
+
+
+class LrclibSearchFetcher(BaseFetcher):
+    @property
+    def source_name(self) -> str:
+        return "lrclib-search"
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return bool(track.title)
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Search LRCLIB for lyrics. Requires at least a title."""
+        if not track.title:
+            logger.debug("LRCLIB-search: skipped — no title")
+            return None
+
+        params: dict[str, str] = {"track_name": track.title}
+        if track.artist:
+            params["artist_name"] = track.artist
+        if track.album:
+            params["album_name"] = track.album
+
+        url = f"{LRCLIB_SEARCH_URL}?{urlencode(params)}"
+        logger.info(f"LRCLIB-search: searching for {track.display_name()}")
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                resp = client.get(url, headers={"User-Agent": UA_LRCFETCH})
+
+            if resp.status_code != 200:
+                logger.error(f"LRCLIB-search: API returned {resp.status_code}")
+                return LyricResult(
+                    status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                )
+
+            data = resp.json()
+
+            if not isinstance(data, list) or len(data) == 0:
+                logger.debug(f"LRCLIB-search: no results for {track.display_name()}")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            logger.debug(f"LRCLIB-search: got {len(data)} candidates")
+
+            # Select best match by duration
+            best = self._select_best(data, track)
+            if best is None:
+                logger.debug("LRCLIB-search: no valid candidate found")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            # Extract lyrics
+            synced = best.get("syncedLyrics")
+            unsynced = best.get("plainLyrics")
+
+            if isinstance(synced, str) and synced.strip():
+                lyrics = normalize_tags(synced.strip())
+                logger.info(
+                    f"LRCLIB-search: got synced lyrics ({len(lyrics.splitlines())} lines)"
+                )
+                return LyricResult(
+                    status=CacheStatus.SUCCESS_SYNCED,
+                    lyrics=lyrics,
+                    source=self.source_name,
+                )
+            elif isinstance(unsynced, str) and unsynced.strip():
+                lyrics = normalize_tags(unsynced.strip())
+                logger.info(
+                    f"LRCLIB-search: got unsynced lyrics ({len(lyrics.splitlines())} lines)"
+                )
+                return LyricResult(
+                    status=CacheStatus.SUCCESS_UNSYNCED,
+                    lyrics=lyrics,
+                    source=self.source_name,
+                    ttl=TTL_UNSYNCED,
+                )
+            else:
+                logger.debug("LRCLIB-search: best candidate has empty lyrics")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+        except httpx.HTTPError as e:
+            logger.error(f"LRCLIB-search: HTTP error: {e}")
+            return LyricResult(status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR)
+        except Exception as e:
+            logger.error(f"LRCLIB-search: unexpected error: {e}")
+            return None
+
+    @staticmethod
+    def _select_best(candidates: list[dict], track: TrackMeta) -> Optional[dict]:
+        """Pick the best candidate, preferring synced lyrics and closest duration."""
+        if track.length is not None:
+            track_s = track.length / 1000.0
+            best: Optional[dict] = None
+            best_diff = float("inf")
+
+            for item in candidates:
+                if not isinstance(item, dict):
+                    continue
+                duration = item.get("duration")
+                if not isinstance(duration, (int, float)):
+                    continue
+                diff = abs(duration - track_s) * 1000  # compare in ms
+                if diff > DURATION_TOLERANCE_MS:
+                    continue
+                # Prefer synced over unsynced at similar duration
+                has_synced = (
+                    isinstance(item.get("syncedLyrics"), str)
+                    and item["syncedLyrics"].strip()
+                )
+                best_synced = (
+                    best is not None
+                    and isinstance(best.get("syncedLyrics"), str)
+                    and best["syncedLyrics"].strip()
+                )
+                if diff < best_diff or (
+                    diff == best_diff and has_synced and not best_synced
+                ):
+                    best_diff = diff
+                    best = item
+
+            if best is not None:
+                logger.debug(
+                    f"LRCLIB-search: selected id={best.get('id')} (diff={best_diff:.0f}ms)"
+                )
+                return best
+
+            logger.debug(
+                f"LRCLIB-search: no candidate within {DURATION_TOLERANCE_MS}ms"
+            )
+            return None
+
+        # No duration — pick first with synced lyrics, or just first
+        for item in candidates:
+            if (
+                isinstance(item, dict)
+                and isinstance(item.get("syncedLyrics"), str)
+                and item["syncedLyrics"].strip()
+            ):
+                return item
+        return candidates[0] if isinstance(candidates[0], dict) else None

lrx/fetchers/netease.py

@@ -0,0 +1,213 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-25 11:04:51
+Description: Netease Cloud Music fetcher
+"""
+
+"""
+Uses the public cloudsearch API for searching and the song/lyric API for
+retrieving lyrics. No authentication required.
+
+Search results are filtered by duration when the track has a known length
+to avoid returning lyrics for the wrong version of a song.
+"""
+
+from typing import Optional
+import httpx
+from loguru import logger
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult, CacheStatus
+from ..lrc import detect_sync_status, normalize_tags
+from ..config import (
+    HTTP_TIMEOUT,
+    TTL_NOT_FOUND,
+    TTL_NETWORK_ERROR,
+    DURATION_TOLERANCE_MS,
+    NETEASE_SEARCH_URL,
+    NETEASE_LYRIC_URL,
+    UA_BROWSER,
+)
+
+_HEADERS = {
+    "User-Agent": UA_BROWSER,
+    "Referer": "https://music.163.com/",
+}
+
+
+class NeteaseFetcher(BaseFetcher):
+    @property
+    def source_name(self) -> str:
+        return "netease"
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return bool(track.title)
+
+    def _search(self, track: TrackMeta, limit: int = 10) -> Optional[int]:
+        """Search Netease and return the best-matching song ID.
+
+        When ``track.length`` is available, candidates are ranked by duration
+        difference and only accepted if within ``DURATION_TOLERANCE_MS``.
+        """
+        query = f"{track.artist or ''} {track.title or ''}".strip()
+        if not query:
+            return None
+
+        logger.debug(f"Netease: searching for '{query}' (limit={limit})")
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                resp = client.post(
+                    NETEASE_SEARCH_URL,
+                    headers=_HEADERS,
+                    data={"s": query, "type": "1", "limit": str(limit), "offset": "0"},
+                )
+                resp.raise_for_status()
+                result = resp.json()
+
+            # Validate response
+            if not isinstance(result, dict):
+                logger.error(
+                    f"Netease: search returned non-dict: {type(result).__name__}"
+                )
+                return None
+
+            result_body = result.get("result")
+            if not isinstance(result_body, dict):
+                logger.debug("Netease: search 'result' field missing or invalid")
+                return None
+
+            songs = result_body.get("songs")
+            if not isinstance(songs, list) or len(songs) == 0:
+                logger.debug("Netease: search returned 0 results")
+                return None
+
+            logger.debug(f"Netease: search returned {len(songs)} candidates")
+
+            # Duration-based best-match selection
+            if track.length is not None:
+                track_ms = track.length
+                best_id: Optional[int] = None
+                best_diff = float("inf")
+
+                for song in songs:
+                    if not isinstance(song, dict):
+                        continue
+                    sid = song.get("id")
+                    name = song.get("name", "?")
+                    duration = song.get("dt")  # milliseconds
+                    if not isinstance(duration, int):
+                        logger.debug(
+                            f"  candidate {sid} '{name}': no duration, skipped"
+                        )
+                        continue
+                    diff = abs(duration - track_ms)
+                    logger.debug(
+                        f"  candidate {sid} '{name}': "
+                        f"duration={duration}ms, diff={diff}ms"
+                    )
+                    if diff < best_diff:
+                        best_diff = diff
+                        best_id = sid
+
+                if best_id is not None and best_diff <= DURATION_TOLERANCE_MS:
+                    logger.debug(f"Netease: selected id={best_id} (diff={best_diff}ms)")
+                    return best_id
+
+                logger.debug(
+                    f"Netease: no candidate within {DURATION_TOLERANCE_MS}ms "
+                    f"(best diff={best_diff}ms)"
+                )
+                return None
+
+            # No duration info — take the first result
+            first = songs[0]
+            if not isinstance(first, dict) or "id" not in first:
+                logger.error("Netease: first search result has no 'id'")
+                return None
+            logger.debug(
+                f"Netease: no duration available, using first result "
+                f"id={first['id']} '{first.get('name', '?')}'"
+            )
+            return first["id"]
+
+        except Exception as e:
+            logger.error(f"Netease: search failed: {e}")
+            return None
+
+    def _get_lyric(self, song_id: int) -> Optional[LyricResult]:
+        """Fetch lyrics for a given Netease song ID."""
+        logger.debug(f"Netease: fetching lyrics for song_id={song_id}")
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                resp = client.post(
+                    NETEASE_LYRIC_URL,
+                    headers=_HEADERS,
+                    data={
+                        "id": str(song_id),
+                        "cp": "false",
+                        "tv": "0",
+                        "lv": "0",
+                        "rv": "0",
+                        "kv": "0",
+                        "yv": "0",
+                        "ytv": "0",
+                        "yrv": "0",
+                    },
+                )
+                resp.raise_for_status()
+                data = resp.json()
+
+            # Validate response
+            if not isinstance(data, dict):
+                logger.error(
+                    f"Netease: lyric response is not dict: {type(data).__name__}"
+                )
+                return LyricResult(
+                    status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                )
+
+            lrc_obj = data.get("lrc")
+            if not isinstance(lrc_obj, dict):
+                logger.debug(
+                    f"Netease: no 'lrc' object in response for song_id={song_id}"
+                )
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            lrc: str = lrc_obj.get("lyric", "")
+            if not isinstance(lrc, str) or not lrc.strip():
+                logger.debug(f"Netease: empty lyrics for song_id={song_id}")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            # Determine sync status
+            lrc = normalize_tags(lrc)
+            status = detect_sync_status(lrc)
+            logger.info(
+                f"Netease: got {status.value} lyrics for song_id={song_id} "
+                f"({len(lrc.splitlines())} lines)"
+            )
+            return LyricResult(
+                status=status, lyrics=lrc.strip(), source=self.source_name
+            )
+
+        except Exception as e:
+            logger.error(f"Netease: lyric fetch failed for song_id={song_id}: {e}")
+            return LyricResult(status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR)
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Search for the track and fetch its lyrics."""
+        query = f"{track.artist or ''} {track.title or ''}".strip()
+        if not query:
+            logger.debug("Netease: skipped — insufficient metadata")
+            return None
+
+        logger.info(f"Netease: fetching lyrics for {track.display_name()}")
+        song_id = self._search(track)
+        if not song_id:
+            logger.debug(f"Netease: no match found for {track.display_name()}")
+            return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+        return self._get_lyric(song_id)

lrx/fetchers/qqmusic.py

@@ -0,0 +1,178 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-31 01:54:02
+Description: QQ Music fetcher via self-hosted API proxy
+"""
+
+"""
+Requires a running qq-music-api instance.
+The base URL is read from the QQ_MUSIC_API_URL environment variable.
+
+Search → pick best match by duration → fetch LRC lyrics.
+"""
+
+from typing import Optional
+import httpx
+from loguru import logger
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult, CacheStatus
+from ..lrc import detect_sync_status, normalize_tags
+from ..config import (
+    HTTP_TIMEOUT,
+    TTL_NOT_FOUND,
+    TTL_NETWORK_ERROR,
+    DURATION_TOLERANCE_MS,
+    QQ_MUSIC_API_URL,
+)
+
+
+class QQMusicFetcher(BaseFetcher):
+    @property
+    def source_name(self) -> str:
+        return "qqmusic"
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return bool(track.title) and bool(QQ_MUSIC_API_URL)
+
+    def _search(self, track: TrackMeta, limit: int = 10) -> Optional[str]:
+        """Search QQ Music and return the best-matching song MID."""
+        query = f"{track.artist or ''} {track.title or ''}".strip()
+        if not query:
+            return None
+
+        logger.debug(f"QQMusic: searching for '{query}' (limit={limit})")
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                resp = client.get(
+                    f"{QQ_MUSIC_API_URL}/api/search",
+                    params={"keyword": query, "type": "song", "num": limit},
+                )
+                resp.raise_for_status()
+                data = resp.json()
+
+            if data.get("code") != 0:
+                logger.error(f"QQMusic: search API error: {data}")
+                return None
+
+            songs = data.get("data", {}).get("list", [])
+            if not songs:
+                logger.debug("QQMusic: search returned 0 results")
+                return None
+
+            logger.debug(f"QQMusic: search returned {len(songs)} candidates")
+
+            # Duration-based best-match selection
+            if track.length is not None:
+                track_ms = track.length
+                best_mid: Optional[str] = None
+                best_diff = float("inf")
+
+                for song in songs:
+                    if not isinstance(song, dict):
+                        continue
+                    mid = song.get("mid")
+                    name = song.get("name", "?")
+                    # interval is in seconds
+                    interval = song.get("interval")
+                    if not isinstance(interval, int):
+                        logger.debug(
+                            f"  candidate {mid} '{name}': no duration, skipped"
+                        )
+                        continue
+                    duration_ms = interval * 1000
+                    diff = abs(duration_ms - track_ms)
+                    logger.debug(
+                        f"  candidate {mid} '{name}': "
+                        f"duration={duration_ms}ms, diff={diff}ms"
+                    )
+                    if diff < best_diff:
+                        best_diff = diff
+                        best_mid = mid
+
+                if best_mid is not None and best_diff <= DURATION_TOLERANCE_MS:
+                    logger.debug(
+                        f"QQMusic: selected mid={best_mid} (diff={best_diff}ms)"
+                    )
+                    return best_mid
+
+                logger.debug(
+                    f"QQMusic: no candidate within {DURATION_TOLERANCE_MS}ms "
+                    f"(best diff={best_diff}ms)"
+                )
+                return None
+
+            # No duration info — take the first result
+            first = songs[0]
+            if not isinstance(first, dict) or "mid" not in first:
+                logger.error("QQMusic: first search result has no 'mid'")
+                return None
+            logger.debug(
+                f"QQMusic: no duration available, using first result "
+                f"mid={first['mid']} '{first.get('name', '?')}'"
+            )
+            return first["mid"]
+
+        except Exception as e:
+            logger.error(f"QQMusic: search failed: {e}")
+            return None
+
+    def _get_lyric(self, mid: str) -> Optional[LyricResult]:
+        """Fetch lyrics for a given QQ Music song MID."""
+        logger.debug(f"QQMusic: fetching lyrics for mid={mid}")
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                resp = client.get(
+                    f"{QQ_MUSIC_API_URL}/api/lyric",
+                    params={"mid": mid},
+                )
+                resp.raise_for_status()
+                data = resp.json()
+
+            if data.get("code") != 0:
+                logger.error(f"QQMusic: lyric API error: {data}")
+                return LyricResult(
+                    status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                )
+
+            lrc = data.get("data", {}).get("lyric", "")
+            if not isinstance(lrc, str) or not lrc.strip():
+                logger.debug(f"QQMusic: empty lyrics for mid={mid}")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            lrc = normalize_tags(lrc)
+            status = detect_sync_status(lrc)
+            logger.info(
+                f"QQMusic: got {status.value} lyrics for mid={mid} "
+                f"({len(lrc.splitlines())} lines)"
+            )
+            return LyricResult(
+                status=status, lyrics=lrc.strip(), source=self.source_name
+            )
+
+        except Exception as e:
+            logger.error(f"QQMusic: lyric fetch failed for mid={mid}: {e}")
+            return LyricResult(status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR)
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Search for the track and fetch its lyrics."""
+        if not QQ_MUSIC_API_URL:
+            logger.debug("QQMusic: skipped — QQ_MUSIC_API_URL not configured")
+            return None
+
+        query = f"{track.artist or ''} {track.title or ''}".strip()
+        if not query:
+            logger.debug("QQMusic: skipped — insufficient metadata")
+            return None
+
+        logger.info(f"QQMusic: fetching lyrics for {track.display_name()}")
+        mid = self._search(track)
+        if not mid:
+            logger.debug(f"QQMusic: no match found for {track.display_name()}")
+            return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+        return self._get_lyric(mid)

lrx/fetchers/spotify.py

@@ -0,0 +1,373 @@
+"""
+Author: Uyanide pywang0608@foxmail.com
+Date: 2026-03-25 10:43:21
+Description: Spotify fetcher — obtains synced lyrics via Spotify's internal color-lyrics API.
+"""
+
+"""
+Authentication flow:
+  1. Fetch server time from Spotify
+  2. Fetch TOTP secret
+  3. Generate a TOTP code and exchange it (with SP_DC cookie) for an access token
+  4. Request lyrics using the access token
+
+The secret and token are cached on the instance to avoid redundant network
+calls within the same session.
+
+Requires SPOTIFY_SP_DC environment variable to be set.
+"""
+
+import httpx
+import json
+import time
+import struct
+import hmac
+import hashlib
+from typing import Optional, Tuple
+from loguru import logger
+
+from .base import BaseFetcher
+from ..models import TrackMeta, LyricResult, CacheStatus
+from ..lrc import normalize_tags
+from ..config import (
+    HTTP_TIMEOUT,
+    SPOTIFY_APP_VERSION,
+    TTL_NOT_FOUND,
+    TTL_NETWORK_ERROR,
+    SPOTIFY_TOKEN_URL,
+    SPOTIFY_LYRICS_URL,
+    SPOTIFY_SERVER_TIME_URL,
+    SPOTIFY_SECRET_URL,
+    SPOTIFY_SP_DC,
+    SPOTIFY_TOKEN_CACHE_FILE,
+    UA_BROWSER,
+)
+
+
+class SpotifyFetcher(BaseFetcher):
+    def __init__(self) -> None:
+        # Session-level caches to avoid refetching within the same run
+        self._cached_secret: Optional[Tuple[str, int]] = None
+        self._cached_token: Optional[str] = None
+        self._token_expires_at: float = 0.0
+
+    @property
+    def source_name(self) -> str:
+        return "spotify"
+
+    def is_available(self, track: TrackMeta) -> bool:
+        return bool(track.trackid) and bool(SPOTIFY_SP_DC)
+
+    # ─── Auth helpers ────────────────────────────────────────────────
+
+    def _get_server_time(self, client: httpx.Client) -> Optional[int]:
+        """Fetch Spotify's server timestamp (seconds since epoch)."""
+        try:
+            res = client.get(SPOTIFY_SERVER_TIME_URL, timeout=HTTP_TIMEOUT)
+            res.raise_for_status()
+            data = res.json()
+            if not isinstance(data, dict) or "serverTime" not in data:
+                logger.error(f"Spotify: unexpected server-time response: {data}")
+                return None
+            server_time = data["serverTime"]
+            logger.debug(f"Spotify: server time = {server_time}")
+            return server_time
+        except Exception as e:
+            logger.error(f"Spotify: failed to fetch server time: {e}")
+            return None
+
+    def _get_secret(self, client: httpx.Client) -> Optional[Tuple[str, int]]:
+        """Fetch and decode the TOTP secret. Cached after first success.
+
+        Response format: [{version: int, secret: str}, ...]
+        Each character in *secret* is XOR-decoded with ``(index % 33) + 9``.
+        """
+        if self._cached_secret is not None:
+            logger.debug("Spotify: using cached TOTP secret")
+            return self._cached_secret
+
+        try:
+            res = client.get(SPOTIFY_SECRET_URL, timeout=HTTP_TIMEOUT)
+            res.raise_for_status()
+            data = res.json()
+
+            if not isinstance(data, list) or len(data) == 0:
+                logger.error(
+                    f"Spotify: unexpected secrets response (type={type(data).__name__}, len={len(data) if isinstance(data, list) else '?'})"
+                )
+                return None
+
+            last = data[-1]
+            if "secret" not in last or "version" not in last:
+                logger.error(f"Spotify: malformed secret entry: {list(last.keys())}")
+                return None
+
+            secret_raw = last["secret"]
+            version = last["version"]
+
+            # XOR decode
+            parts = []
+            for i, char in enumerate(secret_raw):
+                parts.append(str(ord(char) ^ ((i % 33) + 9)))
+            secret = "".join(parts)
+
+            logger.debug(f"Spotify: decoded secret v{version} (len={len(secret)})")
+            self._cached_secret = (secret, version)
+            return self._cached_secret
+
+        except Exception as e:
+            logger.error(f"Spotify: failed to fetch secret: {e}")
+            return None
+
+    @staticmethod
+    def _generate_totp(server_time_s: int, secret: str) -> str:
+        """Generate a 6-digit TOTP code compatible with Spotify's auth.
+
+        Uses HMAC-SHA1 with a 30-second period, matching the Go reference.
+        """
+        counter = server_time_s // 30
+        counter_bytes = struct.pack(">Q", counter)
+
+        mac = hmac.new(secret.encode(), counter_bytes, hashlib.sha1).digest()
+
+        offset = mac[-1] & 0x0F
+        binary_code = (
+            (mac[offset] & 0x7F) << 24
+            | (mac[offset + 1] & 0xFF) << 16
+            | (mac[offset + 2] & 0xFF) << 8
+            | (mac[offset + 3] & 0xFF)
+        )
+
+        code = binary_code % (10**6)
+        return str(code).zfill(6)
+
+    def _load_cached_token(self) -> Optional[str]:
+        """Try to load a valid token from the persistent cache file."""
+        try:
+            with open(SPOTIFY_TOKEN_CACHE_FILE, "r") as f:
+                data = json.load(f)
+            expires_ms = data.get("accessTokenExpirationTimestampMs", 0)
+            if expires_ms <= int(time.time() * 1000):
+                logger.debug("Spotify: persisted token expired")
+                return None
+            token = data.get("accessToken", "")
+            if not token:
+                return None
+            self._cached_token = token
+            self._token_expires_at = expires_ms / 1000.0
+            logger.debug("Spotify: loaded token from cache file")
+            return token
+        except (FileNotFoundError, json.JSONDecodeError, KeyError):
+            return None
+
+    def _save_token(self, body: dict) -> None:
+        """Persist the token response to disk."""
+        try:
+            with open(SPOTIFY_TOKEN_CACHE_FILE, "w") as f:
+                json.dump(body, f)
+            logger.debug("Spotify: token saved to cache file")
+        except Exception as e:
+            logger.warning(f"Spotify: failed to write token cache: {e}")
+
+    def _get_token(self) -> Optional[str]:
+        """Obtain a Spotify access token. Cached in memory and on disk.
+
+        Requires SP_DC cookie (set via SPOTIFY_SP_DC env var).
+        """
+        # 1. Memory cache
+        if self._cached_token and time.time() < self._token_expires_at - 30:
+            logger.debug("Spotify: using in-memory cached token")
+            return self._cached_token
+
+        # 2. Disk cache
+        disk_token = self._load_cached_token()
+        if disk_token and time.time() < self._token_expires_at - 30:
+            return disk_token
+
+        # 3. Fetch new token
+        if not SPOTIFY_SP_DC:
+            logger.error(
+                "Spotify: SPOTIFY_SP_DC env var not set — "
+                "cannot authenticate with Spotify"
+            )
+            return None
+
+        headers = {
+            "User-Agent": UA_BROWSER,
+            "Accept": "*/*",
+            "Referer": "https://open.spotify.com/",
+            "Cookie": f"sp_dc={SPOTIFY_SP_DC}",
+        }
+
+        with httpx.Client(headers=headers) as client:
+            server_time = self._get_server_time(client)
+            if server_time is None:
+                return None
+
+            secret_data = self._get_secret(client)
+            if secret_data is None:
+                return None
+
+            secret, version = secret_data
+            totp = self._generate_totp(server_time, secret)
+            logger.debug(f"Spotify: generated TOTP v{version}: {totp}")
+
+            params = {
+                "reason": "init",
+                "productType": "web-player",
+                "totp": totp,
+                "totpVer": str(version),
+                "totpServer": totp,
+            }
+
+            try:
+                res = client.get(SPOTIFY_TOKEN_URL, params=params, timeout=HTTP_TIMEOUT)
+                if res.status_code != 200:
+                    logger.error(f"Spotify: token request returned {res.status_code}")
+                    return None
+
+                body = res.json()
+
+                if not isinstance(body, dict) or "accessToken" not in body:
+                    logger.error(
+                        f"Spotify: unexpected token response keys: {list(body.keys()) if isinstance(body, dict) else type(body).__name__}"
+                    )
+                    return None
+
+                token = body["accessToken"]
+                is_anonymous = body.get("isAnonymous", False)
+                if is_anonymous:
+                    logger.warning(
+                        "Spotify: received anonymous token — SP_DC may be invalid"
+                    )
+
+                expires_ms = body.get("accessTokenExpirationTimestampMs", 0)
+                if expires_ms and expires_ms > int(time.time() * 1000):
+                    self._token_expires_at = expires_ms / 1000.0
+                else:
+                    logger.warning("Spotify: token expiry missing or invalid")
+                    self._token_expires_at = time.time() + 3600
+
+                self._cached_token = token
+                # Persist to disk (including anonymous tokens, same as Go ref)
+                self._save_token(body)
+                logger.debug("Spotify: obtained access token")
+                return token
+
+            except Exception as e:
+                logger.error(f"Spotify: token request failed: {e}")
+                return None
+
+    # ─── Lyrics ──────────────────────────────────────────────────────
+
+    @staticmethod
+    def _format_lrc_line(start_ms: int, words: str) -> str:
+        """Format a single lyric line as LRC ``[mm:ss.cc]text``."""
+        minutes = start_ms // 60000
+        seconds = (start_ms // 1000) % 60
+        centiseconds = round((start_ms % 1000) / 10.0)
+        return f"[{minutes:02d}:{seconds:02d}.{centiseconds:02.0f}]{words}"
+
+    @staticmethod
+    def _is_truly_synced(lines: list[dict]) -> bool:
+        """Check if lyrics are actually synced (not all timestamps zero)."""
+        for line in lines:
+            try:
+                ms = int(line.get("startTimeMs", "0"))
+                if ms > 0:
+                    return True
+            except (ValueError, TypeError):
+                continue
+        return False
+
+    def fetch(
+        self, track: TrackMeta, bypass_cache: bool = False
+    ) -> Optional[LyricResult]:
+        """Fetch lyrics for a Spotify track by its track ID."""
+        if not track.trackid:
+            logger.debug("Spotify: skipped — no trackid in metadata")
+            return None
+
+        logger.info(f"Spotify: fetching lyrics for trackid={track.trackid}")
+
+        token = self._get_token()
+        if not token:
+            logger.error("Spotify: cannot fetch lyrics without a token")
+            return LyricResult(status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR)
+
+        url = f"{SPOTIFY_LYRICS_URL}{track.trackid}?format=json&vocalRemoval=false&market=from_token"
+        headers = {
+            "User-Agent": UA_BROWSER,
+            "Accept": "application/json",
+            "Authorization": f"Bearer {token}",
+            "Referer": "https://open.spotify.com/",
+            "App-Platform": "WebPlayer",
+            "Spotify-App-Version": SPOTIFY_APP_VERSION,
+            "Origin": "https://open.spotify.com",
+        }
+
+        try:
+            with httpx.Client(timeout=HTTP_TIMEOUT) as client:
+                res = client.get(url, headers=headers)
+
+                if res.status_code == 404:
+                    logger.debug(f"Spotify: 404 for trackid={track.trackid}")
+                    return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+                if res.status_code != 200:
+                    logger.error(f"Spotify: lyrics API returned {res.status_code}")
+                    return LyricResult(
+                        status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                    )
+
+                data = res.json()
+
+            # Validate response structure
+            if not isinstance(data, dict) or "lyrics" not in data:
+                logger.error("Spotify: unexpected lyrics response structure")
+                return LyricResult(
+                    status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR
+                )
+
+            lyrics_data = data["lyrics"]
+            sync_type = lyrics_data.get("syncType", "")
+            lines = lyrics_data.get("lines", [])
+
+            if not isinstance(lines, list) or len(lines) == 0:
+                logger.debug("Spotify: response contained no lyric lines")
+                return LyricResult(status=CacheStatus.NOT_FOUND, ttl=TTL_NOT_FOUND)
+
+            # Determine sync status
+            # syncType == "LINE_SYNCED" AND at least one non-zero timestamp
+            is_synced = sync_type == "LINE_SYNCED" and self._is_truly_synced(lines)
+
+            # Convert to LRC
+            lrc_lines: list[str] = []
+            for line in lines:
+                words = line.get("words", "")
+                if not isinstance(words, str):
+                    continue
+                try:
+                    ms = int(line.get("startTimeMs", "0"))
+                except (ValueError, TypeError):
+                    ms = 0
+
+                if is_synced:
+                    lrc_lines.append(self._format_lrc_line(ms, words))
+                else:
+                    # Unsynced: emit with zero timestamps
+                    lrc_lines.append(f"[00:00.00]{words}")
+
+            content = normalize_tags("\n".join(lrc_lines))
+            status = (
+                CacheStatus.SUCCESS_SYNCED
+                if is_synced
+                else CacheStatus.SUCCESS_UNSYNCED
+            )
+
+            logger.info(f"Spotify: got {status.value} lyrics ({len(lrc_lines)} lines)")
+            return LyricResult(status=status, lyrics=content, source=self.source_name)
+
+        except Exception as e:
+            logger.error(f"Spotify: lyrics fetch failed: {e}")
+            return LyricResult(status=CacheStatus.NETWORK_ERROR, ttl=TTL_NETWORK_ERROR)