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import base64
import time
from aiohttp import web
from cryptography import fernet
from aiohttp_session import get_session, setup
from aiohttp_session.cookie_storage import EncryptedCookieStorage
async def handler(request: web.Request) -> web.Response:
session = await get_session(request)
last_visit = session["last_visit"] if "last_visit" in session else None
session["last_visit"] = time.time()
text = f"Last visited: {last_visit}"
return web.Response(text=text)
def make_app() -> web.Application:
app = web.Application()
# secret_key must be 32 url-safe base64-encoded bytes
fernet_key = fernet.Fernet.generate_key()
secret_key = base64.urlsafe_b64decode(fernet_key)
setup(app, EncryptedCookieStorage(secret_key))
app.router.add_get("/", handler)
return app
web.run_app(make_app())
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