feat(python): 完成 Python 全量迁移——剩余平台、登录通道与公共层修复
- 新增 5sing/apple/xm/me/qt/lr 平台包与取流实现（含 xm-sign、MissEvan 签名、蜻蜓 HMAC、Apple developer token） - 新增 wy/kg/tx/lr 登录：扫码、手机号、账密（kg 20028 风控指纹）、cookie 绑定、kg/tx 续期 - request 层：保留多值 Set-Cookie；JSON body 紧凑化（修复 kg 网关验签）；直连不经系统代理（对齐 Node） - 登录路由统一 Body(embed=True)，修复扫码轮询 422；lifespan 接入登录续期调度 - ruff/format/pyright 全绿；14 平台真实联网与 HTTP 路由验证通过
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"""咪咕音乐公共层（对应 sdk/mg/util.ts）。
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常量、请求封装、条目 → 歌曲的统一转换、档位/扩展名工具与 Z3D 解密。
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上游对应 music-lib/migu/migu.go（convertItemToSong*、collectMiguFormats、pickMiguImage 等）。
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匿名态 listen-url 仅放行 PQ(128k mp3)；HQ/SQ/ZQ 各档需携带登录 Cookie
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（接口返回「登录后免费试听」）。
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Z3D 解密与 `app/http/mg_stream.py` 的流式实现同源：那边服务 /stream/mg 代理，
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这里供取流探测阶段校验候选是否真能解出音频，两处算法必须逐字一致。
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"""
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from __future__ import annotations
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import hashlib
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import math
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import re
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from typing import Any
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from urllib.parse import urlencode
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from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
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from app.sdk.auth_store import get_cookie
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from app.sdk.common.request import http_fetch
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# ---------------- 常量 ----------------
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#: 咪咕 toneFlag → 平台音质标签（types 展示与取流返回共用）
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TONE_QUALITY: dict[str, str] = {
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"LQ": "64k",
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"PQ": "128k",
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"HQ": "320k",
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"SQ": "flac",
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"ZQ": "flac24bit",
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"ZQ24": "flac24bit",
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"ZQ32": "wav",
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"Z3D": "wav",
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"I3D": "flac24bit",
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"3D60": "wav",
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}
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#: tone → 明文容器扩展名（取流侧判定档位与扩展名共用）
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TONE_EXT: dict[str, str] = {
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"LQ": "mp3",
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"PQ": "mp3",
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"HQ": "mp3",
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"SQ": "flac",
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"ZQ": "flac",
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"ZQ24": "flac",
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"ZQ32": "wav",
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"Z3D": "wav",
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"I3D": "m4a",
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"3D60": "wav",
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}
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USER_AGENT = (
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"Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 "
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"(KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1"
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)
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REFERER = "http://music.migu.cn/"
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#: listen-url 走 Android 客户端 UA/头，与网页通道不同 UA
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ANDROID_UA = "Android_migu/7.41.13 okhttp/3.12.13"
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ANDROID_CHANNEL = "0146832"
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ANDROID_VERSION = "7.41.13"
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SONG_DETAIL_URL = "http://c.musicapp.migu.cn/MIGUM2.0/v1.0/content/resourceinfo.do"
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# Z3D 加密流的 app code 密文（AES-128-CBC，key 为 AppKey 前 16 字符）
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_ANDROID_APP_KEY = b"308202333082019c"
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_ENCRYPTED_APP_CODE = bytes(
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[
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0xAE, 0xEA, 0xC7, 0x17, 0x05, 0xA6, 0x89, 0x55,
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0xA9, 0x31, 0xA6, 0xFE, 0x01, 0xE7, 0x28, 0xFF,
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0xF6, 0x49, 0x71, 0xE6, 0x1C, 0xEA, 0xF0, 0x0A,
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0xE3, 0xEA, 0x43, 0xC3, 0xE0, 0x58, 0x33, 0x83,
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]
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) # fmt: skip
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_Z3D_IV = bytes(range(16))
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_INT_PREFIX = re.compile(r"[+-]?\d+")
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# ---------------- 请求 ----------------
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def get_migu_cookie() -> str:
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return get_cookie("mg").strip()
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async def migu_get(url: str, extra_headers: dict[str, str] | None = None) -> Any:
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"""带 Referer/UA/Cookie 的 GET，返回解析后的 body（JSON 已解析）。"""
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headers: dict[str, str] = {"User-Agent": USER_AGENT, "Referer": REFERER, **(extra_headers or {})}
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cookie = get_migu_cookie()
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if cookie:
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headers["Cookie"] = cookie
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resp = await http_fetch(url, headers=headers, timeout=20_000)
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if resp.status_code != 200:
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raise RuntimeError(f"migu http {resp.status_code}")
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return resp.body
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def build_url(base: str, params: dict[str, Any]) -> str:
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"""URLSearchParams 语义：值统一 String 后 form-urlencoded。"""
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return f"{base}?{urlencode([(key, str(value)) for key, value in params.items()])}"
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# ---------------- 工具函数（1:1 对应上游） ----------------
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def parse_int(value: Any) -> int:
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"""JS parseInt 语义：取前导整数，解析不出返回 0。"""
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match = _INT_PREFIX.match(str(value if value is not None else "").strip())
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return int(match.group()) if match else 0
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def to_number(value: Any) -> float:
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"""JS Number() 语义：不可解析或非有限值归零（分页 totalCount / 体积等字段用）。"""
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try:
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number = float(str(value if value is not None else "").strip())
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except (TypeError, ValueError):
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return 0.0
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return number if math.isfinite(number) else 0.0
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def first_non_empty(*values: Any) -> str:
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for value in values:
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if value is None:
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continue
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if str(value).strip():
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return str(value)
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return ""
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def first_non_zero_string(*values: Any) -> str:
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for value in values:
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text = str(value if value is not None else "").strip()
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if text and text != "0":
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return text
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return ""
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def pick_migu_image(items: Any) -> str:
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"""按 02/01/03 的尺寸优先级取图，都没有则取第一张非空。"""
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if not isinstance(items, list):
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return ""
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for preferred in ("02", "01", "03"):
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for item in items:
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entry = item if isinstance(item, dict) else {}
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if entry.get("imgSizeType") == preferred and str(entry.get("img") or "").strip():
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return str(entry.get("img"))
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for item in items:
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entry = item if isinstance(item, dict) else {}
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if str(entry.get("img") or "").strip():
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return str(entry.get("img"))
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return ""
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def normalize_migu_image_url(image: Any) -> str:
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url = str(image if image is not None else "").strip()
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if not url:
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return ""
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if url.startswith(("http://", "https://")):
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return url
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if url.startswith("//"):
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return f"https:{url}"
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if url.startswith("/"):
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return f"https://d.musicapp.migu.cn{url}"
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return url
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def collect_migu_artist_names(item: dict[str, Any]) -> list[str]:
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names: list[str] = []
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seen: set[str] = set()
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def append(name: Any) -> None:
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text = str(name if name is not None else "").strip()
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if not text or text in seen:
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return
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seen.add(text)
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names.append(text)
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for group in ("singers", "singerList", "artists"):
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for singer in item.get(group) or []:
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append((singer or {}).get("name") if isinstance(singer, dict) else None)
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if not names:
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for name in str(item.get("singer") or "").split("|"):
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append(name)
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return names
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_Z3D_CODE_KEYS = (
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"formatType",
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"resourceType",
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"size",
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"androidSize",
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"isize",
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"asize",
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"fileType",
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"androidFileType",
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"iformat",
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"aformat",
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"price",
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)
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def collect_migu_formats(item: dict[str, Any]) -> list[dict[str, Any]]:
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"""汇总三组 rateFormats + z3dCode，按 formatType|resourceType 去重。"""
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groups: list[list[dict[str, Any]]] = []
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for key in ("newRateFormats", "rateFormats", "audioFormats"):
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group = item.get(key)
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if isinstance(group, list):
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groups.append([entry for entry in group if isinstance(entry, dict)])
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code = item.get("z3dCode")
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if isinstance(code, dict) and code.get("formatType"):
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groups.append([{key: code.get(key) for key in _Z3D_CODE_KEYS}])
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formats: list[dict[str, Any]] = []
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seen: set[str] = set()
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for group in groups:
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for fmt in group:
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key = f"{str(fmt.get('formatType') or '').strip().upper()}|{str(fmt.get('resourceType') or '').strip()}"
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if key == "|" or key in seen:
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continue
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seen.add(key)
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formats.append(fmt)
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return formats
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_FORMAT_RANK: dict[str, int] = {
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"ZQ32": 80,
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"ZQ": 75,
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"ZQ24": 75,
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"SQ": 70,
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"HQ": 60,
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"I3D": 50,
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"Z3D": 50,
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"3D60": 40,
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"PQ": 30,
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"LQ": 20,
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}
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def migu_format_rank(format_type: Any = "") -> int:
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return _FORMAT_RANK.get(str(format_type or "").strip().upper(), 10)
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def migu_format_ext(format_type: Any = "", format_code: Any = "") -> str:
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tone = str(format_type or "").strip().upper()
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code = str(format_code or "").strip()
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if tone in ("SQ", "ZQ", "ZQ24"):
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return "flac"
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if tone in ("ZQ32", "Z3D", "3D60"):
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return "wav"
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if tone == "I3D":
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return "m4a"
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if tone in ("PQ", "HQ", "LQ"):
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return "mp3"
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return "flac" if code.startswith("011") else "mp3"
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def normalize_tone(value: Any = "") -> str:
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"""取流档位归一：去掉前导点、大写，只认 TONE_EXT 里已知的 toneFlag。"""
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text = str(value if value is not None else "").strip()
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if text.startswith("."):
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text = text[1:]
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text = text.upper()
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return text if text in TONE_EXT else ""
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def migu_album_link(album_id: str) -> str:
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return f"https://music.migu.cn/v3/music/album/{album_id}"
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def migu_playlist_link(playlist_id: str) -> str:
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return f"https://music.migu.cn/v5/#/playlist?playlistId={playlist_id}&playlistType=ordinary"
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def migu_song_link(content_id: str) -> str:
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return f"https://music.migu.cn/v3/music/song/{content_id}"
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def format_seconds(seconds: float) -> str:
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minutes = math.floor(seconds / 60)
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secs = math.floor(seconds % 60)
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return f"{minutes:02d}:{secs:02d}"
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# ---------------- 条目 → 歌曲（上游 convertItemToSongWithOption） ----------------
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def _seconds_from_size(size: int, bitrate: int) -> int:
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return math.floor(size * 8 / bitrate) if bitrate > 0 else 0
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def convert_item_to_song(item: dict[str, Any], allow_paid: bool = True) -> dict[str, Any] | None:
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artist_names = collect_migu_artist_names(item)
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song_name = first_non_empty(item.get("name"), item.get("songName"))
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album_name = str(item.get("album") or "").strip()
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albums = item.get("albums") or []
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if isinstance(albums, list) and albums:
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first_album = albums[0] if isinstance(albums[0], dict) else {}
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if str(first_album.get("name") or "").strip():
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album_name = str(first_album.get("name")).strip()
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formats = collect_migu_formats(item)
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if not formats:
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return None
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duration = to_number(item.get("duration"))
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download_tags = [str(tag or "").strip().lower() for tag in (item.get("downloadTags") or [])]
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candidates: list[dict[str, Any]] = []
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for index, fmt in enumerate(formats):
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size_text = first_non_zero_string(fmt.get("androidSize"), fmt.get("asize"), fmt.get("size"), fmt.get("isize"))
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size_value = parse_int(size_text)
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ext = first_non_empty(fmt.get("androidFileType"), fmt.get("fileType"))
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if not ext:
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ext = migu_format_ext(fmt.get("formatType"), first_non_empty(fmt.get("aformat"), fmt.get("iformat")))
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if not duration and size_value > 0:
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bitrate = {"PQ": 128_000, "HQ": 320_000, "LQ": 64_000}.get(str(fmt.get("formatType") or ""), 0)
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if bitrate > 0:
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duration = _seconds_from_size(size_value, bitrate)
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price_value = parse_int(fmt.get("price"))
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show_tags = fmt.get("showTag")
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tags = show_tags if isinstance(show_tags, list) and show_tags else (fmt.get("showTags") or [])
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is_vip_tag = any(str(tag or "").strip().lower() == "vip" for tag in tags)
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if not is_vip_tag:
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is_vip_tag = "vip" in download_tags
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hidden_paid = item.get("chargeAuditions") == "1" and price_value >= 200
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if allow_paid or (not is_vip_tag and not hidden_paid):
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candidates.append(
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{
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"index": index,
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"size": size_value,
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"ext": ext,
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"rank": migu_format_rank(fmt.get("formatType")),
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"vip": is_vip_tag or hidden_paid,
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"tone": str(fmt.get("formatType") or ""),
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}
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)
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if not candidates:
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return None
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candidates.sort(key=lambda entry: (-entry["rank"], -entry["size"]))
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best = candidates[0]
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best_format = formats[best["index"]]
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cover_url = normalize_migu_image_url(
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first_non_empty(
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pick_migu_image(item.get("imgItems")),
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pick_migu_image(item.get("albumImgs")),
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item.get("img1"),
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item.get("img2"),
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item.get("img3"),
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)
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)
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# albums 数组是搜索响应的专辑来源（顶层 albumId 常为空），与上游 Extra 的 album_id 同义
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album_id = first_non_empty(item.get("albumId"), (albums[0] if albums else {}).get("id"))
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link_id = first_non_empty(item.get("contentId"), item.get("copyrightId"))
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resource_type = best_format.get("resourceType")
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format_type = best_format.get("formatType")
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extra: dict[str, str] = {
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"content_id": str(item.get("contentId") or ""),
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# 注意：extra 用空串兜底，songmid 用 '2' 兜底（与原文两处写法不同）
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"resource_type": str(resource_type if resource_type is not None else ""),
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"format_type": str(format_type if format_type is not None else ""),
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}
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if item.get("copyrightId"):
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extra["copyright_id"] = str(item["copyrightId"])
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if item.get("songId"):
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extra["song_id"] = str(item["songId"])
|
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if album_id:
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extra["album_id"] = album_id
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is_vip = item.get("chargeAuditions") == "1" or bool(best["vip"])
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songmid = f"{item.get('contentId') or ''}|{resource_type if resource_type is not None else '2'}|{format_type or ''}"
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# 各档位可用性（供前端展示）；实际可取档位由取流接口的探测结果决定
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types = [{"type": TONE_QUALITY.get(entry["tone"], "128k"), "size": str(entry["size"])} for entry in candidates]
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return {
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"songmid": songmid,
|
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"name": song_name,
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"singer": " / ".join(artist_names),
|
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"albumId": album_id,
|
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"albumName": album_name,
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"interval": format_seconds(duration) if duration else "0",
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"img": cover_url or None,
|
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"lrc": None,
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"types": types,
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"_types": {},
|
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"payPlay": is_vip,
|
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# 路由/取流需要 content_id|resource_type|format_type 三元组与版权号，放在 extra 里
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"extra": {**extra, "link": migu_song_link(link_id)},
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"source": "mg",
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}
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|
||||
# ---------------- 歌曲详情 ----------------
|
||||
|
||||
|
||||
async def fetch_song_detail(content_id: str) -> dict[str, Any]:
|
||||
url = build_url(SONG_DETAIL_URL, {"resourceType": "2", "resourceId": content_id})
|
||||
body = await migu_get(url)
|
||||
resource = body.get("resource") if isinstance(body, dict) else None
|
||||
if not resource:
|
||||
raise RuntimeError("migu 歌曲详情为空")
|
||||
return resource[0]
|
||||
|
||||
|
||||
# ---------------- Z3D 解密（上游 DecryptAudio / miguZ3DStreamKey） ----------------
|
||||
|
||||
|
||||
def is_migu_audio_magic(data: bytes) -> bool:
|
||||
"""判断是否明文音频：fLaC / RIFF-WAVE / OggS / ID3 / MP4(ftyp) / MP3 帧同步。"""
|
||||
if not data or len(data) < 4:
|
||||
return False
|
||||
if data[:4] in (b"fLaC", b"OggS"):
|
||||
return True
|
||||
if data[:4] == b"RIFF" and len(data) >= 12 and data[8:12] == b"WAVE":
|
||||
return True
|
||||
if data[:3] == b"ID3":
|
||||
return True
|
||||
if len(data) >= 12 and data[4:8] == b"ftyp":
|
||||
return True
|
||||
return data[0] == 0xFF and (data[1] & 0xE0) == 0xE0
|
||||
|
||||
|
||||
def migu_z3d_stream_key(file_key: str) -> bytes:
|
||||
"""streamKey = MD5(解密后的 appCode + fileKey) 的大写十六进制（32 字节 ASCII）。"""
|
||||
key = str(file_key or "").strip()
|
||||
if not key:
|
||||
raise RuntimeError("空的 z3d fileKey")
|
||||
# Go 的 CryptBlocks 按块解密不做 PKCS#7 去填充，这里同样禁用填充，否则尾块校验失败
|
||||
decryptor = Cipher(algorithms.AES(_ANDROID_APP_KEY), modes.CBC(_Z3D_IV)).decryptor()
|
||||
app_code = decryptor.update(_ENCRYPTED_APP_CODE) + decryptor.finalize()
|
||||
digest = hashlib.md5(app_code + key.encode("utf-8")).hexdigest().upper()
|
||||
return digest.encode("ascii")
|
||||
|
||||
|
||||
def decrypt_z3d(data: bytes, file_key: str) -> bytes:
|
||||
"""Z3D 流解密：逐字节 `plain[i] = cipher[i] - key[i % 32]`；已是明文则原样返回。"""
|
||||
if not data:
|
||||
raise RuntimeError("空的 z3d 数据")
|
||||
if is_migu_audio_magic(data):
|
||||
return data
|
||||
payload = data[3:] if data[:3] == b"Z3D" else data
|
||||
if not payload:
|
||||
raise RuntimeError("剥离 Z3D 魔数后无数据")
|
||||
stream_key = migu_z3d_stream_key(file_key)
|
||||
plain = bytes((byte - stream_key[index & 31]) & 0xFF for index, byte in enumerate(payload))
|
||||
if not is_migu_audio_magic(plain):
|
||||
raise RuntimeError("z3d 解密后不是有效音频")
|
||||
return plain
|
||||
Reference in new issue
Block a user