79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
from typing import Optional, Iterable
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from base64 import b64decode
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import zlib
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import re
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from itertools import filterfalse, islice
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from datetime import datetime
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import httpx
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from lrc_dl.core import Song, AbstractProvider
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from lrc_dl.registry import lyrics_provider
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KRC_ENCODE_KEY = [64, 71, 97, 119, 94, 50, 116, 71, 81, 54, 49, 45, 206, 210, 110, 105]
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RE_KRC_JUNK = re.compile(r"^\[((id|ar|ti|by|hash|al|sign|qq|total|language):|offset:0\]|.*\](<.*>)?(Written by：|Lyrics by：|Composed by：|Producer：|作曲 :|作词 :)).*$")
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RE_WORD_TIMING = re.compile(r"<-?\d+,-?\d+,-?\d+>")
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def decode_krc(content: bytes) -> str:
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content = b64decode(content)
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buf = bytearray(len(content) - 4)
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for i in range(4, len(content)):
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buf[i - 4] = content[i] ^ KRC_ENCODE_KEY[(i - 4) % 16]
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return zlib.decompress(buf).decode('utf-8-sig')
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def reformat_timings(lines: Iterable[str]) -> Iterable[str]:
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for line in lines:
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if not line.startswith("["):
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yield line
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continue
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raw_timings, text = line.split("]", 1)
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beginning, _ = map(int, raw_timings[1:].split(","))
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timing = datetime.fromtimestamp(beginning / 1000).strftime("%M:%S.%f")[:8]
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yield f"[{timing}]{text}"
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@lyrics_provider
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class Kugou(AbstractProvider):
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name = "kugou"
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def fetch_lyrics(self: AbstractProvider, song: Song) -> Optional[str]:
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keyword = f"{song.artist} - {song.title}"
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response = httpx.get("https://krcs.kugou.com/search", params={
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"ver": 1,
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"man": "yes",
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"client": "mobi",
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"keyword": keyword
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}).json()
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candidates = response["candidates"]
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if not candidates:
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return None
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id_, accesskey = candidates[0]["id"], candidates[0]["accesskey"]
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r = httpx.get("https://krcs.kugou.com/download", params={
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"ver": 1,
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"man": "yes",
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"client": "mobi",
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"format": "lrc",
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"id": id_,
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"accesskey": accesskey
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}).json()
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krc = decode_krc(r["content"])
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krc = RE_WORD_TIMING.sub("", krc)
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lines = reformat_timings(islice(filterfalse(RE_KRC_JUNK.match, krc.splitlines()), 1, None))
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return "\n".join(lines)
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