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snowy-yang 6288a98ecc refactor: 拆分 4 个巨石模块为包,清理过时注释并删除作废文档
为什么:单文件 1100~1900 行的巨石模块让「改一处要通读全文」;同时注释里残留
大量已删台账的编号,以及「Flask/FastAPI 双栈迁移期」这类已失实的架构描述,
会误导后来者按不复存在的架构去改代码。

拆分(对外导入路径不变,行为零变更):
- music_downloader.py  -> music_downloader/(models/downloader/cover/_http/_log/_concurrency)
- auth_system.py       -> auth_system/(db/security/users/credits/ledger/mail/cards/backup...)
- music_api.py         -> music_api/(api/client/crypto/qr/cookies/compat/constants/errors)
- services/runtime.py  -> services/(api_service/_shared/_taskcore/downloads/batch/podcast/
  streaming/tasks);services/runtime.py 保留为兼容门面

兼容性做法:各包用 __init__.py 以 __all__ 原样再导出全部符号,既有调用点
(auth_system.xxx / services.xxx / from music_api import Y)零改动;路径常量改为经包属性
动态读取(auth_system.DB_PATH),否则测试的 monkeypatch 会静默失效并写到生产库。

修复 9 处代码损伤(上一轮注释清理把 `()` 当「空括号残留」删掉所致;用「与拆分前逐字
等价」校验逐一定位,静态检查只会报出其中 4 处):
- core/config.py  ).strip() or '*'
- core/state.py   threading.Lock() x2
- qr_login.py     datetime.now() / .strip()
- music_downloader/downloader.py  .lower()
- services/podcast.py  set() / time.time() x2

清理与删除:
- 删除 部署文档.md / 功能介绍.md / README_私有包警告.txt
- 清理指向已删台账与文档的过时编号注释;把「迁移期 / 两栈 / 双框架 / 已迁移」等
  失实描述改写为现状描述(保留 `<-> Flask /path` 映射表等仍有价值的契约来源说明)
- _mkpkg.py:公开包剔除清单去掉已不存在的文档名;私有包警告改为自包含
- pyproject.toml:补 pythonpath = ["."],使裸跑 pytest 不再 import core 失败

验证:ruff 全通过;pyright 0 errors / 0 warnings(102 文件);pytest 144 passed;
真实 uvicorn 冒烟 6 条路由符合预期且生产 data/ 指纹未变;忽略注释的逐字等价性校验通过。
2026-09-26 12:37:48 +08:00

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# -*- coding: utf-8 -*-
"""音频流代理。
要点:
- 签名校验:token 由 core.security 校验(密钥同源);失效 403。
- HEAD 无正文:直接 200 + Accept-Ranges,不请求上游。
- Range 透传:客户端 Range 原样转发上游,206/Content-Range 原样回传(拖动进度可用)。
- 编码透明:上游若带 Content-Encoding(aiohttp 会解压),不得沿用压缩前的
Content-Length/Content-Range(否则头体不一致)。
- 流式转发:16KB 分块,不整段入内存;下游中断时 finally 关闭上游响应。
- Cache-Control: no-store。
"""
from fastapi import APIRouter, Request
from fastapi.responses import Response, StreamingResponse
from core import security
from core.http_client import client as http_client
from web.response import error
router = APIRouter()
_UPSTREAM_HEADERS = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
'Referer': 'https://music.163.com/',
}
_CHUNK = 16 * 1024
@router.api_route('/audio_stream', methods=['GET', 'HEAD'])
async def audio_stream(request: Request):
"""签名音频代理流(支持 Range 拖动进度)。"""
if request.method == 'HEAD':
return Response(status_code=200, headers={'Accept-Ranges': 'bytes'})
token = request.query_params.get('token', '')
url = security.verify_audio_token(token)
if not url:
return error('音频链接已过期或无效,请重新解析', 403)
upstream_headers = dict(_UPSTREAM_HEADERS)
range_header = request.headers.get('range')
if range_header:
upstream_headers['Range'] = range_header
try:
upstream = await http_client.open('GET', url, headers=upstream_headers, timeout=20)
except Exception:
return error('音频获取失败', 502)
if upstream.status >= 400:
upstream.close()
return error('音频获取失败', 502)
upstream_encoded = bool(upstream.headers.get('Content-Encoding'))
pass_headers: dict[str, str] = {}
if not upstream_encoded:
for h in ('Content-Length', 'Content-Range', 'Accept-Ranges'):
if h in upstream.headers:
pass_headers[h] = upstream.headers[h]
elif 'Accept-Ranges' in upstream.headers:
pass_headers['Accept-Ranges'] = upstream.headers['Accept-Ranges']
pass_headers['Cache-Control'] = 'no-store'
async def _body():
try:
async for chunk in upstream.content.iter_chunked(_CHUNK):
yield chunk
finally:
# 下游断开/提前关闭时也释放上游连接
upstream.close()
return StreamingResponse(
_body(),
status_code=upstream.status,
media_type=upstream.headers.get('Content-Type', 'audio/mpeg'),
headers=pass_headers,
)