70 lines
2.5 KiB
Python
70 lines
2.5 KiB
Python
"""FastAPI 入口（B7 集成）：路由挂载、trace 中间件、lifespan、统一错误体。
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lifespan（B7 挂账⑤⑥）：
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- 启动期校验：非 development 环境且鉴权工厂仍为 debug 头实现 → 拒绝启动
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（T-01 接入 JWT 后置 deps.AUTH_FACTORY_IS_DEBUG=False 放行）；
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- Redis 网关单例注册（惰性连接，publish/DEL 失败降级不阻塞业务）；
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- shutdown 统一 dispose 数据库引擎（utils/db 工厂，B6 复审 P3 泄漏收口）。
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trace：X-Trace-Id 透传/生成 + 响应头回写（trace.py 约束：call_next 前 set，
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同步路由线程池由 anyio 传播，一致性 B8 断言兜底）。
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"""
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from __future__ import annotations
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import re
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from contextlib import asynccontextmanager
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from fastapi import FastAPI, Request
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from app.api import deps
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from app.api.risk import router as risk_router
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from app.api.simulate import router as simulate_router
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from app.config.settings import settings
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from app.service.risk import redis_gateway
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from app.utils.db import dispose_engines
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from app.utils.response import register_error_handlers
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from app.utils.trace import new_trace, reset_trace, set_trace
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# 透传外部 X-Trace-Id 的格式白名单（防响应头注入；不合规一律新生成）
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_TRACE_ID_PATTERN = re.compile(r"^[A-Za-z0-9._-]{1,64}$")
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@asynccontextmanager
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async def lifespan(_: FastAPI):
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if settings.app_env != "development" and deps.AUTH_FACTORY_IS_DEBUG:
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raise RuntimeError(
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"debug auth factory is wired but app_env is not 'development'; "
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"deploy T-01 JWT auth first or set app_env=development"
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)
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redis_gateway.set_gateway(redis_gateway.RedisGateway())
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try:
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yield
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finally:
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redis_gateway.set_gateway(None)
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dispose_engines()
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app = FastAPI(title="JinRong Agent Platform", version="0.2.0", lifespan=lifespan)
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register_error_handlers(app)
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app.include_router(risk_router)
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app.include_router(simulate_router)
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@app.middleware("http")
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async def trace_middleware(request: Request, call_next):
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"""trace_id 贯通：透传合法 X-Trace-Id，否则生成；响应头回写。"""
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incoming = request.headers.get("X-Trace-Id", "")
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trace_id = incoming if _TRACE_ID_PATTERN.fullmatch(incoming) else new_trace()
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token = set_trace(trace_id)
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try:
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response = await call_next(request)
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finally:
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reset_trace(token)
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response.headers["X-Trace-Id"] = trace_id
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return response
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@app.get("/health")
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def health():
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return {"status": "ok", "env": settings.app_env}
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