# 1. 先创建 FastAPI 应用实例(只创建一次) from fastapi import FastAPI from fastapi.middleware.cors import CORSMiddleware # 导入 CORS 模块 app = FastAPI() # 核心实例,只定义一次 # 3. 注册路由(必须显式挂载,否则路由不生效) if __name__ == "__main__": import uvicorn # uvicorn.run(app, host="0.0.0.0", port=8000, ssl_keyfile="ssl/cert.key", ssl_certfile="ssl/cert.crt") uvicorn.run("app.main:app", host="0.0.0.0", port=8000, reload=True)