Archived
snowy-yang
064a89d726
为什么：React 迁移已验证完毕（浏览器冒烟全过、golden 刷新）， legacy 模板兜底分支指向已删除的文件只会制造幻觉路径。删除 templates/index.html（466KB）与 static/site_auth.js（80KB）及 /static 挂载；jinja2 随兜底分支失去唯一使用者，连同 markupsafe 一并移出依赖（63 包 -2）。_render_index 简化为直接读构建产物—— dist 已入库恒存在，无需分支。
143 lines
6.3 KiB
Python
143 lines
6.3 KiB
Python
# -*- coding: utf-8 -*-
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"""FastAPI 应用工厂。
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本应用即唯一服务端：全部端点在 web/routers/ 下按业务域注册。
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`api_prefix` 用于把整套路由挂到指定前缀下（便于契约测试与反向代理）。
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"""
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import asyncio
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from contextlib import asynccontextmanager
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from pathlib import Path
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from fastapi import FastAPI
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from fastapi.staticfiles import StaticFiles
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import auth_system
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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 admin as admin_router
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from web.routers import admin_site as admin_site_router
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from web.routers import auth as auth_router
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from web.routers import auth_status as auth_status_router
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from web.routers import delivery as delivery_router
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from web.routers import download as download_router
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from web.routers import index as index_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 register as register_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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from web.routers import user as user_router
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def _make_lifespan(start_monitor: bool):
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"""构造 lifespan（是否启动任务监控线程由 create_app 参数决定）。"""
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@asynccontextmanager
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async def _lifespan(app: FastAPI):
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"""应用生命周期：建表 → 启动任务监控 → 关闭时释放连接池与后台 loop。
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启动必须建表。全新部署时宿主机的 data/ 往往是个空目录（compose 用
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`./data:/app/data` 挂载，会盖掉镜像内的任何内容），此时若只等首次查询
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让 sqlite3 自动建库，得到的是一张 **0 表空库**——随后所有涉库端点报
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`no such table: users`（实测登录端点直接 500，且错误被吞成"请稍后重试"，
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极难定位）。init_db 全程 `CREATE TABLE IF NOT EXISTS` + 幂等迁移，
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对已有库重复执行无副作用，故放启动期最稳妥。
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任务监控线程也必须在此启动：Flask 单体时代由模块级 `threading.Thread(
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target=_task_monitor_loop).start()` 拉起（基线 main.py:4594），移除 Flask
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迁到 FastAPI 时该启动点丢失，此后监控循环从未运行——心跳超时不再暂停
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离线设备、超时任务不再取消、过期任务与下载缓存不再回收、账本孤儿对账
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不再执行（预扣未退款的账永久悬挂）。详见 services.tasks.start_task_monitor。
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"""
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await asyncio.to_thread(auth_system.init_db)
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if start_monitor:
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from services.tasks import start_task_monitor
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await asyncio.to_thread(start_task_monitor)
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yield
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try:
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from core import aiohttp_compat, async_bridge, http_client
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await http_client.client.close()
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await aiohttp_compat.close()
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# 停掉 sync↔async 桥的后台事件循环（daemon 线程不调也能随进程退出，
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# 但显式关闭更干净）
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async_bridge.shutdown()
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except Exception:
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pass
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return _lifespan
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def _init_audio_secret() -> None:
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"""注入音频签名密钥（与 auth_system 同源，令直链 token 与服务端一致）。"""
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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(api_prefix: str = '', *, start_monitor: bool = True) -> FastAPI:
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"""创建 FastAPI 应用。
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api_prefix：路由挂载前缀。
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- ''（默认）：直接服务前端使用的根路径（生产形态）
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- '/api/v1'：挂在子前缀下（便于契约测试与反向代理）
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start_monitor：是否随应用启动任务监控线程。生产恒为 True；
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测试若以 `with TestClient(app)` 方式进入 lifespan，可传 False
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以避免后台线程清扫用例的临时目录。
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"""
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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=_make_lifespan(start_monitor),
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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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# React 构建产物（vite build → frontend/dist，hash 指纹资源挂 /assets）
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_dist_dir = Path(__file__).resolve().parent.parent / 'frontend' / 'dist'
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if (_dist_dir / 'assets').is_dir():
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app.mount(
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'/assets',
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StaticFiles(directory=str(_dist_dir / 'assets')),
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name='assets',
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)
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# 业务路由：统一挂到 api_prefix（默认空前缀，即前端使用的根路径）
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app.include_router(system_router.router, prefix=api_prefix, tags=['system'])
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app.include_router(site_router.router, prefix=api_prefix, tags=['site'])
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app.include_router(music_router.router, prefix=api_prefix, tags=['music'])
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app.include_router(account_router.router, prefix=api_prefix, tags=['account'])
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app.include_router(podcast_router.router, prefix=api_prefix, tags=['podcast'])
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app.include_router(tasks_router.router, prefix=api_prefix, tags=['tasks'])
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app.include_router(delivery_router.router, prefix=api_prefix, tags=['delivery'])
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app.include_router(stream_router.router, prefix=api_prefix, tags=['stream'])
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app.include_router(auth_status_router.router, prefix=api_prefix, tags=['auth'])
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app.include_router(auth_router.router, prefix=api_prefix, tags=['auth'])
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app.include_router(user_router.router, prefix=api_prefix, tags=['user'])
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app.include_router(admin_router.router, prefix=api_prefix, tags=['admin'])
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app.include_router(register_router.router, prefix=api_prefix, tags=['auth'])
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app.include_router(admin_site_router.router, prefix=api_prefix, tags=['admin'])
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app.include_router(download_router.router, prefix=api_prefix, tags=['download'])
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# 首页（根路径，不挂前缀）
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app.include_router(index_router.router, tags=['index'])
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install_error_handlers(app)
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return app
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