Archived
snowy-yang
183f5744d8
为什么：IDE 里成片的黄色波浪线并非风格噪声。ruff 与 pyright(basic) 都是 0 报错，但 basic 会整体漏报「变量可能未绑定」这类**可执行缺陷**；实测 standard 多报 7 处且全部为真——异常处理器引用了尚未赋值的局部变量，一旦走进 异常分支就会 NameError 二次崩溃，把原始异常彻底掩盖。 - core/db.py, core/http_client.py：3 处 @asynccontextmanager 的返回标注 AsyncIterator[X] 更正为 AsyncGenerator[X, None]（前者不含 send 语义） - core/state.py：三个模块级缓存补 TypedDict 建模。原先无标注的 dict 字面量被 推断为「所有值类型的并集」（float | None），每个读写点都退化成联合类型； 拆成 _VipCache（data 可为 None 表示未探测）与 _VipEntry（data 必定存在）后， 类型检查立刻抓出 account.py 对未探测缓存的直接解包隐患 - services/batch.py：zip_valid 提到函数头。ZIP 构建前的业务错误（参数缺失/ 无歌曲）会 early raise，而异常处理器引用了该名字 → NameError 二次崩溃 - services/podcast.py：radio_name、pct 同理补初始化 - services/downloads.py：声明返回 str 却可能给出 None，改 `or ''` 满足契约 - web/routers/download.py：id_list 提前绑定 - web/auth_state.py：解包出的 c 未被使用 - pyproject.toml：typeCheckingMode 由 basic 升到 standard 作为门禁，并移除 已被 standard 覆盖的 reportGeneralTypeIssues 门禁：ruff All checks passed · pyright(standard) 0 errors 0 warnings
322 lines
12 KiB
Python
322 lines
12 KiB
Python
# -*- coding: utf-8 -*-
|
||
"""单曲下载、账号探测与任务交付。
|
||
|
||
（自 services/runtime.py 拆出，行为与原实现一致。）
|
||
"""
|
||
|
||
import os
|
||
import shutil
|
||
import time
|
||
import traceback
|
||
import zipfile
|
||
from pathlib import Path
|
||
|
||
import auth_system
|
||
from core.config import (
|
||
USER_COOKIE_FILE,
|
||
)
|
||
from core.state import (
|
||
DOWNLOAD_TASKS,
|
||
DOWNLOAD_TASKS_LOCK,
|
||
)
|
||
from core.state import GLOBAL_MUSIC_U_CACHE as _GLOBAL_MUSIC_U_CACHE
|
||
from core.state import VIP_PROBE_LOCK as _VIP_PROBE_LOCK
|
||
from core.utils import format_lyric as _format_lyric
|
||
from music_api import (
|
||
account_info,
|
||
detect_vip_by_probe,
|
||
)
|
||
from music_downloader import (
|
||
DownloadCanceled,
|
||
DownloadException,
|
||
fetch_cover_bytes,
|
||
)
|
||
from qr_login import QRLoginClient
|
||
|
||
from ._shared import (
|
||
_build_download_base,
|
||
_record_log,
|
||
)
|
||
from ._taskcore import (
|
||
_mark_task_terminal,
|
||
)
|
||
from .api_service import (
|
||
api_service,
|
||
)
|
||
|
||
|
||
def _parse_cookie_str(raw) -> dict[str, str]:
|
||
"""将 'k=v;k2=v2' 格式的 Cookie 字符串解析为字典"""
|
||
cookies: dict[str, str] = {}
|
||
if not raw:
|
||
return cookies
|
||
for part in str(raw).split(';'):
|
||
if '=' in part:
|
||
k, v = part.strip().split('=', 1)
|
||
if k:
|
||
cookies[k] = v
|
||
return cookies
|
||
|
||
|
||
# _GLOBAL_MUSIC_U_CACHE 已迁出至 core.state（此处 import 同名共享）
|
||
|
||
|
||
def _global_music_u() -> str:
|
||
"""全局账号 MUSIC_U（5 分钟缓存；后台重新扫码后自动跟随新值）"""
|
||
now = time.time()
|
||
if _GLOBAL_MUSIC_U_CACHE['v'] is None or now - _GLOBAL_MUSIC_U_CACHE['ts'] > 300:
|
||
try:
|
||
ck = api_service._get_cookies()
|
||
_GLOBAL_MUSIC_U_CACHE['v'] = (ck.get('MUSIC_U') or '').strip()
|
||
except Exception:
|
||
_GLOBAL_MUSIC_U_CACHE['v'] = ''
|
||
_GLOBAL_MUSIC_U_CACHE['ts'] = now
|
||
# 契约返回 str：缓存未命中且读取失败时 v 会是 None，统一收敛为空串
|
||
return _GLOBAL_MUSIC_U_CACHE['v'] or ''
|
||
|
||
|
||
def _vip_name(vip_type: int) -> str:
|
||
"""根据 vipType 返回会员类型名称（兼容新旧取值）"""
|
||
return {
|
||
0: '普通用户',
|
||
1: '音乐包',
|
||
11: '黑胶VIP',
|
||
100: '黑胶VIP',
|
||
10: '黑胶SVIP',
|
||
110: '黑胶SVIP'
|
||
}.get(vip_type, '普通用户')
|
||
|
||
|
||
def _detect_vip(cookies: dict[str, str]) -> tuple[int, str, list[str]]:
|
||
"""检测账号会员类型与可解析音质：
|
||
优先账号接口（vipType 精确），并始终用音质探测接口实测可解析列表。
|
||
探测单飞锁（有界等待 0.5s）——上游黑洞时并发请求不再各自串行
|
||
8 级探测（最坏 16 分钟线程滞留），等锁超时者直接用账号接口给降级结果"""
|
||
if not _VIP_PROBE_LOCK.acquire(timeout=0.5):
|
||
info = account_info(cookies)
|
||
if info:
|
||
return info.get('vipType', 0), 'account', []
|
||
return 0, 'probe', []
|
||
try:
|
||
probe = detect_vip_by_probe(cookies)
|
||
levels_ok = probe.get('levels_ok', [])
|
||
info = account_info(cookies)
|
||
if info:
|
||
return info.get('vipType', 0), 'account', levels_ok
|
||
return probe.get('vip_type', 0), 'probe', levels_ok
|
||
finally:
|
||
_VIP_PROBE_LOCK.release()
|
||
|
||
|
||
# ============ 管理员设置（二维码登录 / Cookie 管理） ============
|
||
|
||
def _admin_client() -> QRLoginClient:
|
||
"""创建二维码登录客户端（基于 cookie.txt）"""
|
||
return QRLoginClient()
|
||
|
||
|
||
# ============ 个人歌单（游客扫码登录自己的账号） ============
|
||
|
||
def _user_client() -> QRLoginClient:
|
||
"""创建个人用户二维码登录客户端（后不再落盘 user_cookie.txt，
|
||
USER_COOKIE_FILE 仅作 QRLoginClient 构造参数遗留）"""
|
||
return QRLoginClient(USER_COOKIE_FILE)
|
||
|
||
|
||
def _task_delivery_copy(task_id: str, src: Path, filename: str) -> str:
|
||
"""把共享缓存文件复制/硬链接为任务专属交付文件（任务成果与共享缓存分离，
|
||
任何任务的清理都不会再删掉别的任务的成果）"""
|
||
task_dir = api_service.downloads_path / 'tasks' / task_id
|
||
task_dir.mkdir(parents=True, exist_ok=True)
|
||
dst = task_dir / filename
|
||
if dst.exists():
|
||
return str(dst)
|
||
try:
|
||
os.link(str(src), str(dst)) # 同卷硬链接：零拷贝
|
||
except OSError:
|
||
shutil.copy2(str(src), str(dst))
|
||
return str(dst)
|
||
|
||
|
||
# _cleanup_task_dir 死代码删除——worker 直接 rmtree、监控线程直接
|
||
# rmtree，本函数全文件零调用（审计确认）。
|
||
|
||
|
||
def _single_download_worker(task_id: str) -> None:
|
||
"""后台单曲下载：下载音频（可选 ZIP 打包），支持取消；完成后由 /download/result 交付，35 分钟保留期清理"""
|
||
import tempfile as _tempfile
|
||
|
||
file_path_str: str | None = None
|
||
zip_tmp_path: str | None = None
|
||
task_dir_path: str | None = None
|
||
try:
|
||
with DOWNLOAD_TASKS_LOCK:
|
||
task = DOWNLOAD_TASKS[task_id]
|
||
task['status'] = 'running'
|
||
task['msg'] = '下载中...'
|
||
params = task['params']
|
||
cancel_ev = task['cancel']
|
||
music_id = params['music_id']
|
||
quality = params['quality']
|
||
filename_format = params['filename_format']
|
||
write_meta = params['write_meta']
|
||
meta_fields = params['meta_fields']
|
||
lyric_format = params['lyric_format']
|
||
need_zip = params['need_zip']
|
||
cookies = params['cookies']
|
||
remote_ip = params.get('remote_ip') or '-'
|
||
|
||
# 一次预取歌曲完整信息（URL/详情/歌词三接口并行），
|
||
# 替代原先 name_v1 + url_v1 + 下载器内部 get_music_info 的重复串行调用
|
||
mi = api_service.downloader.get_music_info(music_id, quality, cookies)
|
||
music_info = {
|
||
'id': music_id,
|
||
'name': mi.name,
|
||
'artist_string': mi.artists,
|
||
'album': mi.album,
|
||
'pic_url': mi.pic_url,
|
||
'file_type': mi.file_type,
|
||
'file_size': mi.file_size,
|
||
'duration': mi.duration * 1000,
|
||
'download_url': mi.download_url,
|
||
}
|
||
base = _build_download_base(filename_format, music_info)
|
||
filename = f"{base}.{music_info['file_type']}"
|
||
|
||
# 字节级进度回调（限频 0.4s）：写进任务 live_percent，/api/batch_progress
|
||
# 对运行中的单曲任务优先返回它——原实现 done 按首计数，单曲进度条全程 0%
|
||
_cb_ts = {'t': 0.0}
|
||
|
||
def _progress_cb(written, total_bytes):
|
||
try:
|
||
now = time.time()
|
||
if now - _cb_ts['t'] < 0.4 and written < (total_bytes or 0):
|
||
return
|
||
_cb_ts['t'] = now
|
||
with DOWNLOAD_TASKS_LOCK:
|
||
t = DOWNLOAD_TASKS.get(task_id)
|
||
if not t or t.get('status') != 'running':
|
||
return
|
||
if total_bytes:
|
||
pct = min(99.0, written / total_bytes * 100)
|
||
t['live_percent'] = pct
|
||
t['msg'] = (f"下载中 {int(pct)}% · "
|
||
f"{api_service._format_file_size(written)}/{api_service._format_file_size(total_bytes)}")
|
||
else:
|
||
t['msg'] = f"下载中 · 已接收 {api_service._format_file_size(written)}"
|
||
except Exception:
|
||
pass # 进度上报故障绝不影响下载
|
||
|
||
download_result = api_service.downloader.download_music_file(
|
||
music_id, quality,
|
||
write_meta=write_meta,
|
||
meta_fields=meta_fields,
|
||
cookies=cookies,
|
||
cancel_event=cancel_ev,
|
||
music_info=mi,
|
||
progress_cb=_progress_cb,
|
||
)
|
||
if not download_result.success:
|
||
raise DownloadException(download_result.error_message or "下载失败")
|
||
# 下载完成后的每一阶段都可能已被取消，发布前统一校验
|
||
if cancel_ev.is_set():
|
||
raise DownloadCanceled("任务已取消")
|
||
assert download_result.file_path is not None
|
||
cache_path = Path(download_result.file_path)
|
||
# 交付文件用任务专属副本，共享缓存不进清理清单
|
||
file_path_str = _task_delivery_copy(task_id, cache_path, filename)
|
||
task_dir_path = str(Path(file_path_str).parent)
|
||
|
||
if need_zip:
|
||
fd, zip_tmp_path = _tempfile.mkstemp(prefix='single_zip_', suffix='.zip',
|
||
dir=str(Path(file_path_str).parent))
|
||
os.close(fd)
|
||
with zipfile.ZipFile(zip_tmp_path, 'w', zipfile.ZIP_DEFLATED) as zf:
|
||
zf.write(file_path_str, arcname=filename)
|
||
# 歌词已在预取时一并拿到，无需再请求一次
|
||
if mi.lyric:
|
||
try:
|
||
zf.writestr(f"{base}.{lyric_format}", _format_lyric(mi.lyric, lyric_format))
|
||
except Exception:
|
||
pass
|
||
# 封面走共享缓存（与元数据写入共用同一次网络请求）
|
||
cover = fetch_cover_bytes(mi.pic_url)
|
||
if cover:
|
||
zf.writestr(f"{base}.jpg", cover)
|
||
info_txt = (
|
||
f"歌曲: {music_info['name']}\n"
|
||
f"歌手: {music_info['artist_string']}\n"
|
||
f"专辑: {music_info['album']}\n"
|
||
f"音质: {api_service._get_quality_display_name(quality)}\n"
|
||
)
|
||
zf.writestr("info.txt", info_txt)
|
||
# 打包阶段同样以取消检查收口
|
||
if cancel_ev.is_set():
|
||
raise DownloadCanceled("任务已取消")
|
||
result = {
|
||
'file_path': file_path_str,
|
||
'zip_path': zip_tmp_path,
|
||
'filename': f"{base}.zip",
|
||
'mimetype': 'application/zip',
|
||
'audio_files': [file_path_str],
|
||
}
|
||
else:
|
||
result = {
|
||
'file_path': file_path_str,
|
||
'filename': filename,
|
||
'mimetype': f"audio/{music_info['file_type']}",
|
||
'audio_files': [file_path_str],
|
||
}
|
||
|
||
# 最终发布前的取消检查（末段取消不得覆盖为 done）
|
||
if cancel_ev.is_set():
|
||
raise DownloadCanceled("任务已取消")
|
||
with DOWNLOAD_TASKS_LOCK:
|
||
t = DOWNLOAD_TASKS.get(task_id)
|
||
if t is None or t.get('status') in ('canceled', 'error'):
|
||
raise DownloadCanceled("任务已取消")
|
||
t['status'] = 'done'
|
||
t['completed_at'] = time.time()
|
||
t['done'] = 1
|
||
t['msg'] = '下载完成'
|
||
t['result'] = result
|
||
# 交付已落定；结算失败不再把任务改标 error（钱由重启对账兜底，宁可商家小损不坑用户）
|
||
try:
|
||
auth_system.ledger_settle(task_id, 1, 'delivered')
|
||
except Exception as _e:
|
||
api_service.logger.error(f"单曲交付结算失败（重启对账兜底）: {task_id} {_e}")
|
||
try:
|
||
_record_log('下载', remote_ip, music_info['name'])
|
||
except Exception:
|
||
pass
|
||
api_service.logger.info(f"单曲下载完成: {filename} ({task_id})")
|
||
except DownloadCanceled:
|
||
_mark_task_terminal(task_id, 'canceled', '任务已取消')
|
||
try:
|
||
auth_system.ledger_settle(task_id, 0, 'canceled')
|
||
except Exception:
|
||
pass
|
||
if task_dir_path:
|
||
shutil.rmtree(task_dir_path, ignore_errors=True)
|
||
api_service.logger.info(f"单曲下载已取消: {task_id}")
|
||
except DownloadException as e:
|
||
_mark_task_terminal(task_id, 'error', str(e))
|
||
try:
|
||
auth_system.ledger_settle(task_id, 0, 'error')
|
||
except Exception:
|
||
pass
|
||
if task_dir_path:
|
||
shutil.rmtree(task_dir_path, ignore_errors=True)
|
||
api_service.logger.error(f"单曲下载失败: {task_id} {e}")
|
||
except Exception as e:
|
||
# 非预期异常的 repr 可能含上游主机/连接细节——用户可见文案
|
||
# 泛化为固定文案，原文 logger 先行留档（教训：先记录再泛化）
|
||
api_service.logger.error(f"单曲下载异常: {task_id} {e}\n{traceback.format_exc()}")
|
||
_mark_task_terminal(task_id, 'error', '下载失败，请稍后重试')
|
||
try:
|
||
auth_system.ledger_settle(task_id, 0, 'error')
|
||
except Exception:
|
||
pass
|
||
if task_dir_path:
|
||
shutil.rmtree(task_dir_path, ignore_errors=True)
|