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后端源码/yifan.action-ai.cn/api/app/plugin/init_app.py
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237
后端源码/yifan.action-ai.cn/api/app/plugin/init_app.py
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# -*- coding: utf-8 -*-
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from starlette.responses import HTMLResponse
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from typing import Any, AsyncGenerator
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from fastapi import APIRouter, Depends, FastAPI, Request, Response
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from fastapi.staticfiles import StaticFiles
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from fastapi.concurrency import asynccontextmanager
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from fastapi.openapi.docs import (
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get_redoc_html,
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get_swagger_ui_html,
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get_swagger_ui_oauth2_redirect_html
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)
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from fastapi_limiter import FastAPILimiter
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from fastapi_limiter.depends import RateLimiter
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from math import ceil
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from app.config.setting import settings
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from app.core.logger import log
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from app.core.discover import router
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from app.core.exceptions import CustomException, handle_exception
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from app.utils.common_util import import_module, import_modules_async
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from app.scripts.initialize import InitializeData
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from app.core.database import redis_connect
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from app.api.v1.module_application.job.tools.ap_scheduler import SchedulerUtil
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from app.api.v1.module_system.params.service import ParamsService
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from app.api.v1.module_system.dict.service import DictDataService
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@asynccontextmanager
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async def lifespan(app: FastAPI) -> AsyncGenerator[Any, Any]:
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"""
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自定义 FastAPI 应用生命周期。
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参数:
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- app (FastAPI): FastAPI 应用实例。
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返回:
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- AsyncGenerator[Any, Any]: 生命周期上下文生成器。
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"""
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try:
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await InitializeData().init_db()
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log.info(f"✅ {settings.DATABASE_TYPE}数据库初始化完成")
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# 初始化Redis连接（如果启用）
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if settings.REDIS_ENABLE:
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await redis_connect(app=app, status=True)
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log.info("✅ Redis连接初始化完成")
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await import_modules_async(modules=settings.EVENT_LIST, desc="全局事件", app=app, status=True)
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log.info("✅ 全局事件模块加载完成")
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# 只有在Redis启用时才初始化Redis相关的服务
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if settings.REDIS_ENABLE:
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if not hasattr(app.state, 'redis') or app.state.redis is None:
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raise CustomException(msg="Redis未正确初始化", data="请检查Redis配置和连接")
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await ParamsService().init_config_service(redis=app.state.redis)
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log.info("✅ Redis系统配置初始化完成")
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await DictDataService().init_dict_service(redis=app.state.redis)
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log.info("✅ Redis数据字典初始化完成")
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# 初始化请求限制器
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await FastAPILimiter.init(
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redis=app.state.redis,
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prefix=settings.REQUEST_LIMITER_REDIS_PREFIX,
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http_callback=http_limit_callback,
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)
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log.info("✅ 请求限制器初始化完成")
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await SchedulerUtil.init_system_scheduler()
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scheduler_jobs_count = len(SchedulerUtil.get_all_jobs())
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scheduler_status = SchedulerUtil.get_job_status()
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log.info(f"✅ 定时任务调度器初始化完成 ({scheduler_jobs_count} 个任务)")
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# 导入并显示最终的启动信息面板
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from app.utils.console import run as console_run
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from app.common.enums import EnvironmentEnum
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console_run(
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host=settings.SERVER_HOST,
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port=settings.SERVER_PORT,
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reload=True if settings.ENVIRONMENT == EnvironmentEnum.DEV else False,
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redis_ready=settings.REDIS_ENABLE and hasattr(app.state, 'redis') and app.state.redis is not None,
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scheduler_jobs=scheduler_jobs_count,
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scheduler_status=scheduler_status,
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)
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except Exception as e:
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log.error(f"❌ 应用初始化失败: {str(e)}")
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raise
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yield
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try:
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await import_modules_async(modules=settings.EVENT_LIST, desc="全局事件", app=app, status=False)
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log.info("✅ 全局事件模块卸载完成")
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await SchedulerUtil.close_system_scheduler()
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log.info("✅ 定时任务调度器已关闭")
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# 只有在Redis启用时才关闭请求限制器
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if settings.REDIS_ENABLE:
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await FastAPILimiter.close()
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log.info("✅ 请求限制器已关闭")
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except Exception as e:
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log.error(f"❌ 应用关闭过程中发生错误: {str(e)}")
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def register_middlewares(app: FastAPI) -> None:
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"""
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注册全局中间件。
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参数:
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- app (FastAPI): FastAPI 应用实例。
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返回:
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- None
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"""
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for middleware in settings.MIDDLEWARE_LIST[::-1]:
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if not middleware:
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continue
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middleware = import_module(middleware, desc="中间件")
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app.add_middleware(middleware)
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def register_exceptions(app: FastAPI) -> None:
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"""
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统一注册异常处理器。
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参数:
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- app (FastAPI): FastAPI 应用实例。
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返回:
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- None
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"""
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handle_exception(app)
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def register_routers(app: FastAPI) -> None:
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"""
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注册根路由。
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参数:
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- app (FastAPI): FastAPI 应用实例。
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返回:
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- None
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"""
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# 兼容不同部署形态：
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# - 有的环境由网关把 /api/v1 转发到应用根路径（此时路由应直接注册在 /）
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# - 有的环境直接以 /api/v1 作为真实路径访问（此时需要注册在 /api/v1）
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# 为避免上线后出现全站 404，这里同时注册两套路径。
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def _include_into(target: APIRouter) -> None:
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if settings.REDIS_ENABLE:
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target.include_router(
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router=router,
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dependencies=[Depends(RateLimiter(times=5, seconds=10))],
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)
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else:
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target.include_router(router=router)
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# 1) 无前缀（默认）
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root_container = APIRouter()
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_include_into(root_container)
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app.include_router(root_container)
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# 2) /api/v1 前缀（可选）
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root_prefix = (settings.ROOT_PATH or "").rstrip("/")
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if root_prefix and root_prefix != "/":
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api_container = APIRouter(prefix=root_prefix)
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_include_into(api_container)
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app.include_router(api_container)
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def register_files(app: FastAPI) -> None:
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"""
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注册静态资源挂载和文件相关配置。
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参数:
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- app (FastAPI): FastAPI 应用实例。
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返回:
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- None
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"""
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# 挂载静态文件目录
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if settings.STATIC_ENABLE:
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# 确保日志目录存在
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settings.STATIC_ROOT.mkdir(parents=True, exist_ok=True)
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app.mount(path=settings.STATIC_URL, app=StaticFiles(directory=settings.STATIC_ROOT), name=settings.STATIC_DIR)
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def reset_api_docs(app: FastAPI) -> None:
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"""
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使用本地静态资源自定义 API 文档页面（Swagger UI 与 ReDoc）。
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参数:
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- app (FastAPI): FastAPI 应用实例。
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返回:
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- None
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"""
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@app.get(settings.DOCS_URL, include_in_schema=False)
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async def custom_swagger_ui_html() -> HTMLResponse:
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return get_swagger_ui_html(
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openapi_url=str(app.root_path) + str(app.openapi_url),
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title=app.title + " - Swagger UI",
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oauth2_redirect_url=app.swagger_ui_oauth2_redirect_url,
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swagger_js_url=settings.SWAGGER_JS_URL,
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swagger_css_url=settings.SWAGGER_CSS_URL,
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swagger_favicon_url=settings.FAVICON_URL,
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)
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@app.get(str(app.swagger_ui_oauth2_redirect_url), include_in_schema=False)
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async def swagger_ui_redirect():
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return get_swagger_ui_oauth2_redirect_html()
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@app.get(settings.REDOC_URL, include_in_schema=False)
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async def custom_redoc_html():
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return get_redoc_html(
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openapi_url=str(app.root_path) + str(app.openapi_url),
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title=app.title + " - ReDoc",
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redoc_js_url=settings.REDOC_JS_URL,
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redoc_favicon_url=settings.FAVICON_URL,
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)
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async def http_limit_callback(request: Request, response: Response, expire: int):
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"""
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请求限制时的默认回调函数
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:param request: FastAPI 请求对象
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:param response: FastAPI 响应对象
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:param expire: 剩余毫秒数
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:return:
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"""
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expires = ceil(expire / 30)
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raise CustomException(
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status_code=429,
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msg='请求过于频繁，请稍后重试',
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data={'Retry-After': str(expires)},
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)
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