77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
from typing import Optional
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import jwt
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import time
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from config import JWT_CONFIG
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from schemas.auth import TokenResponse, TokenPayload
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SECRET_KEY = JWT_CONFIG['secret_key']
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ALGORITHM = JWT_CONFIG['algorithm']
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ACCESS_TOKEN_EXPIRE = JWT_CONFIG['access_token_expire']
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REFRESH_TOKEN_EXPIRE = JWT_CONFIG['refresh_token_expire']
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def get_current_time() -> int:
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"""获取当前UTC时间戳"""
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return int(time.time())
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def create_token(user_id: int, username: str, role: str, expire_delta: int) -> str:
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"""创建JWT token"""
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expire = get_current_time() + expire_delta
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to_encode = {
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"id": user_id,
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"username": username,
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"role": role,
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"exp": expire
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}
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return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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def create_access_token(user_id: int, username: str, role: str) -> str:
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"""创建access token"""
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return create_token(user_id, username, role, ACCESS_TOKEN_EXPIRE)
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def create_refresh_token(user_id: int, username: str, role: str) -> str:
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"""创建refresh token"""
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return create_token(user_id, username, role, REFRESH_TOKEN_EXPIRE)
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def create_tokens_response(user_id: int, username: str, role: str) -> TokenResponse:
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"""创建access token和refresh token"""
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access_token = create_access_token(user_id, username, role)
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refresh_token = create_refresh_token(user_id, username, role)
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# 获取token的过期时间
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access_token_exp = get_current_time() + int(ACCESS_TOKEN_EXPIRE.total_seconds())
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refresh_token_exp = get_current_time() + int(REFRESH_TOKEN_EXPIRE.total_seconds())
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return TokenResponse(
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access_token=access_token,
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refresh_token=refresh_token,
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token_type="bearer",
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access_token_exp=access_token_exp,
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refresh_token_exp=refresh_token_exp
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)
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def verify_token(token: str) -> Optional[TokenPayload]:
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"""验证token有效性并返回payload，如果token无效则返回None"""
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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return TokenPayload(
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id=payload.get("id"),
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username=payload.get("username"),
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role=payload.get("role"),
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exp=payload.get("exp")
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)
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except (jwt.ExpiredSignatureError, jwt.InvalidTokenError):
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return None
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def refresh_tokens(refresh_token: str) -> Optional[TokenResponse]:
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"""使用refresh token刷新access token，如果refresh token无效则返回None"""
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token_data = verify_token(refresh_token)
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if token_data is None:
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return None
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else:
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return create_tokens_response(
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user_id=token_data.id,
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username=token_data.username,
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role=token_data.role
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)
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