Archived
snowy-yang
0104ae55e5
- web/routers/stream.py：/api/v1/audio_stream 音频范围流代理 · 签名校验（core.security，密钥同源两栈互认）；HEAD 直接 200 不请求上游 · Range 原样透传上游（206 + Content-Range，拖动进度可用） · 编码透明：上游带 Content-Encoding 时不沿用压缩前长度（同 Flask F92） · StreamingResponse 16KB 分块，finally 关闭上游（下游中断亦释放） - core/http_client.py 增 open()：返回未关闭流式响应，便于先读状态码再转发 - web/routers/delivery.py：/download/result、/download/batch_zip/result · 归属 403 / 进行中 202 / 暂停 200 / 取消 200 / 失败 500 / 缺失 404 分支逐一对齐 · FileResponse 流式交付 + no-store + X-Download-Filename；清理由监控线程统一回收 验证：pytest 51/51（新增 5 项流代理：无效 token/HEAD/全量/Range 透传/上游关闭）； ruff All checks passed；pyright 0 errors；奇偶校验 26/26；实测 5.2MB 流与 Range 206 正确。
98 lines
3.6 KiB
Python
98 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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"""FastAPI 应用工厂。
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设计（strangler 迁移）：
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- 已迁移的路由挂在 `/api/v1` 前缀下，与遗留 Flask 的同名路由（根路径）并存，
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便于逐端点比对响应契约（.zcode/refactor/parity.py）。
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- `serve_flask_fallback=True` 时，把未迁移的遗留 Flask 应用整体挂到根路径兜底，
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实现「新端点走 FastAPI、其余走 Flask」的单进程双框架运行；迁移完成后删掉该开关。
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注意（默认关闭的原因）：Flask fallback 会在 FastAPI 进程内 import main，
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进而初始化 MusicAPIService / 打开 SQLite —— 与生产既有的 waitress 进程是
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两套独立进程语义。生产切换前需按计划把状态与任务模型统一（见迁移计划阶段 C），
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当前仅用于开发期联调。
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"""
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from contextlib import asynccontextmanager
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from fastapi import FastAPI
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from core.config import APP_VERSION
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from core.security import init_secret_key
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from web.errors import install_error_handlers
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from web.middleware import ResponseHygieneMiddleware
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from web.routers import account as account_router
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from web.routers import delivery as delivery_router
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from web.routers import music as music_router
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from web.routers import podcast as podcast_router
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from web.routers import site as site_router
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from web.routers import stream as stream_router
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from web.routers import system as system_router
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from web.routers import tasks as tasks_router
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@asynccontextmanager
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async def _lifespan(app: FastAPI):
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"""应用生命周期：关闭时释放 aiohttp 连接池（含按事件循环隔离的 session）。"""
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yield
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try:
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from core import aiohttp_compat, http_client
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await http_client.client.close()
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await aiohttp_compat.close()
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except Exception:
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pass
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def _init_audio_secret() -> None:
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"""注入音频签名密钥（与 Flask 同源，令两栈 token 互认）。"""
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try:
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import auth_system
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init_secret_key(auth_system.get_secret_key())
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except Exception:
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pass
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def create_app(serve_flask_fallback: bool = False) -> FastAPI:
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"""创建 FastAPI 应用。"""
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_init_audio_secret()
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app = FastAPI(
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title='云村小助手API服务',
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version=APP_VERSION,
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docs_url='/api/v1/docs',
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redoc_url=None,
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openapi_url='/api/v1/openapi.json',
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lifespan=_lifespan,
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)
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# 响应侧统一处理：安全头 + 音频直链签名保护 + 版本指纹抹除
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app.add_middleware(ResponseHygieneMiddleware)
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# 已迁移路由：统一挂 /api/v1（迁移期与 Flask 根路径并存，便于对比）
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app.include_router(system_router.router, prefix='/api/v1', tags=['system'])
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app.include_router(site_router.router, prefix='/api/v1', tags=['site'])
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app.include_router(music_router.router, prefix='/api/v1', tags=['music'])
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app.include_router(account_router.router, prefix='/api/v1', tags=['account'])
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app.include_router(podcast_router.router, prefix='/api/v1', tags=['podcast'])
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app.include_router(tasks_router.router, prefix='/api/v1', tags=['tasks'])
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app.include_router(delivery_router.router, prefix='/api/v1', tags=['delivery'])
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app.include_router(stream_router.router, prefix='/api/v1', tags=['stream'])
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install_error_handlers(app)
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if serve_flask_fallback:
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_mount_flask_fallback(app)
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return app
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def _mount_flask_fallback(app: FastAPI) -> None:
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"""把遗留 Flask WSGI 应用挂到根路径，兜底未迁移的路由。"""
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from starlette.middleware.wsgi import WSGIMiddleware
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import main as legacy_flask
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app.mount('/', WSGIMiddleware(legacy_flask.app))
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