107 lines
3.7 KiB
Python
107 lines
3.7 KiB
Python
# Copyright 2026 zhaoxi826
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import jwt
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import os
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from datetime import datetime, timedelta, timezone
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from typing import Optional
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from fastapi import HTTPException, status, Request
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from pydantic import BaseModel, ValidationError
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from pretor.core.database.table.user import User
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from passlib.context import CryptContext
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class TokenData(BaseModel):
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user_id: str
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username: Optional[str] = None
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exp: Optional[int] = None
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SECRET_KEY = os.getenv("SECRET_KEY", "your-fallback-secret-for-dev")
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 # 默认有效期 1 天
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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class Accessor:
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@staticmethod
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def _decode_token(token: str) -> TokenData:
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try:
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payload = jwt.decode(
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token,
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SECRET_KEY,
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algorithms=[ALGORITHM]
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)
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return TokenData(**payload)
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except jwt.ExpiredSignatureError:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Token 已过期",
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)
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except (jwt.InvalidTokenError, ValidationError):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="无效的认证凭证",
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)
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@staticmethod
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def _create_access_token(data: dict) -> str:
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to_encode = data.copy()
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expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": int(expire.timestamp())})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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@staticmethod
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def _verify_password(plain_password: str, hashed_password: str) -> bool:
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return pwd_context.verify(plain_password, hashed_password)
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@staticmethod
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def get_current_user(request: Request) -> TokenData:
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auth_header = request.headers.get("Authorization")
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if not auth_header or not auth_header.startswith("Bearer "):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="未提供认证头部",
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)
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token = auth_header.split(" ")[1]
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return Accessor._decode_token(token)
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@staticmethod
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def login_hashed_password(user: User, password: str) -> str:
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if not user:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="用户不存在",
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)
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if not Accessor._verify_password(password, user.hashed_password):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="用户名或密码错误",
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)
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token_payload = {
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"user_id": str(user.id), # 确保是字符串格式
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"username": user.username
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}
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return Accessor._create_access_token(data=token_payload)
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@staticmethod
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def hash_password(password: str) -> str:
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if not password:
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raise ValueError("密码不能为空")
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if len(password) < 6:
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raise ValueError("密码长度不能小于 6 位")
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return pwd_context.hash(password)
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