Datenbank vorübergehend nicht verfügbar

import sqlite3
from contextlib import asynccontextmanager
from pathlib import Path
from urllib.parse import urlsplit
from fastapi import FastAPI, Request
from fastapi.responses import HTMLResponse
from fastapi.staticfiles import StaticFiles
from database import initialize
from routes import dashboard, income, export
from api.routes import router as api_router


@asynccontextmanager
async def lifespan(app):
    initialize()
    yield


app = FastAPI(title='Finance Dashboard', lifespan=lifespan)
app.mount('/static', StaticFiles(directory=Path(__file__).parent / 'static'), name='static')
app.include_router(dashboard.router)
app.include_router(income.router)
app.include_router(export.router)
app.include_router(api_router)


@app.middleware('http')
async def protect_forms(request: Request, call_next):
    if request.method == 'POST' and not request.url.path.startswith('/api/v1/'):
        origin = request.headers.get('origin')
        if request.headers.get('sec-fetch-site') == 'cross-site' or (origin and urlsplit(origin).netloc != request.headers.get('host')):
            return HTMLResponse('Fremder Formularursprung ist nicht erlaubt.', status_code=403)
    return await call_next(request)


@app.exception_handler(sqlite3.OperationalError)
async def database_error(request, error):
    return HTMLResponse('<html lang="de"><meta charset="utf-8"><h1>Datenbank vorübergehend nicht verfügbar</h1><p>Bitte in einigen Sekunden erneut versuchen.</p><a href="/">Zum Dashboard</a></html>', status_code=503, headers={'Retry-After': '5'})


@app.get('/health')
def health():
    return {'status': 'ok'}