from fastapi import FastAPI, Request

from fastapi.exceptions import RequestValidationError

from fastapi.middleware.cors import CORSMiddleware

from starlette.exceptions import HTTPException as StarletteHTTPException

import logging

from core.config import get_settings

from core.logging import setup_logging

from core.route_scanner import scan_routers

from utils.response import CustomResponse

settings = get_settings()

# 初始化日志系统

setup_logging()

logger = logging.getLogger(__name__)

logger.info("Application starting...")

logger.debug(f"Current settings: {settings.json()}")

app = FastAPI(

title=settings.PROJECT_NAME,

version=settings.VERSION,

description=settings.DESCRIPTION,

docs_url="/docs" if settings.DEBUG else None,

redoc_url="/redoc" if settings.DEBUG else None,

)

# 设置CORS

if settings.BACKEND_CORS_ORIGINS:

app.add_middleware(

CORSMiddleware,

allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],

allow_credentials=True,

allow_methods=["*"],

allow_headers=["*"],

)

# 全局扫描API路由

routers = scan_routers("api")

for router in routers:

app.include_router(router, prefix=settings.API_V1_STR)

# 全局异常处理

@app.exception_handler(StarletteHTTPException)

async def http_exception_handler(request: Request, exc: StarletteHTTPException):

return CustomResponse.error(message=exc.detail, status_code=exc.status_code)

@app.exception_handler(RequestValidationError)

async def validation_exception_handler(request: Request, exc: RequestValidationError):

return CustomResponse.error(message=str(exc), status_code=400)

@app.get("/")

async def root():

return CustomResponse.success(data={"message": "Welcome to Dify HTTP Service"})