import base64, json, hmac, hashlib, time

secret = b"change_me_to_a_random_long_secret"
uid = 1  # 替换为你的用户ID
exp = int(time.time()) + 3600  # 1小时后过期

payload = base64.urlsafe_b64encode(json.dumps({"uid": uid, "exp": exp}).encode()).decode().rstrip("=")
sign = hmac.new(secret, payload.encode(), hashlib.sha256).digest()
sig = base64.urlsafe_b64encode(sign).decode().rstrip("=")

token = f"{payload}.{sig}"
print(token)