Initial commit

services/auth.py

@@ -0,0 +1,161 @@
+from datetime import datetime, timedelta, timezone
+from typing import Annotated
+
+import jwt
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jwt.exceptions import InvalidTokenError
+from passlib.context import CryptContext
+from pydantic import BaseModel
+
+from models.database import UserAccount
+from services.config import ConfigCenter
+
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 * 365
+
+
+async def get_secret_key():
+    return await ConfigCenter.get_secret_key(
+        "SECRET_KEY", None
+    )
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenData(BaseModel):
+    username: str | None = None
+
+
+class User(BaseModel):
+    id:int
+    username: str
+    email: str | None = None
+    full_name: str | None = None
+    disabled: bool | None = None
+
+
+class UserInDB(User):
+    hashed_password: str
+
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/login")
+
+
+def verify_password(plain_password, hashed_password):
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password):
+    return pwd_context.hash(password)
+
+
+def get_user(db, username: str):
+    if username in db:
+        user_dict = db[username]
+        return UserInDB(**user_dict)
+
+
+async def get_user_db(username_or_email: str):
+    user = await UserAccount.get_or_none(username=username_or_email)
+    if not user:
+        user = await UserAccount.get_or_none(email=username_or_email)
+    if user:
+        return UserInDB(
+            id= user.id,
+            username=user.username,
+            email=user.email,
+            full_name=user.full_name,
+            disabled=user.disabled,
+            hashed_password=user.hashed_password,
+        )
+
+
+def authenticate_user(fake_db, username: str, password: str):
+    user = get_user(fake_db, username)
+    if not user:
+        return False
+    if not verify_password(password, user.hashed_password):
+        return False
+    return user
+
+
+async def authenticate_user_db(username_or_email: str, password: str):
+    user = await get_user_db(username_or_email)
+    if not user:
+        return False
+    if not verify_password(password, user.hashed_password):
+        return False
+    return user
+
+
+async def register_user(username: str, password: str, email: str = None, full_name: str = None):
+    if await has_users():
+        raise HTTPException(status_code=403, detail="系统已初始化，不允许注册新用户")
+    exists = await UserAccount.get_or_none(username=username)
+    if exists:
+        raise HTTPException(status_code=400, detail="用户名已存在")
+    hashed = get_password_hash(password)
+    user = await UserAccount.create(
+        username=username,
+        email=email,
+        full_name=full_name,
+        hashed_password=hashed,
+        disabled=False,
+    )
+    return user
+
+
+async def has_users() -> bool:
+    """
+    检查数据库中是否存在任何用户
+    """
+    user_count = await UserAccount.all().count()
+    return user_count > 0
+
+
+async def create_access_token(data: dict, expires_delta: timedelta | None = None):
+    to_encode = data.copy()
+    if "sub" not in to_encode and "username" in to_encode:
+        to_encode["sub"] = to_encode["username"]
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(minutes=15)
+    to_encode.update({"exp": expire})
+    secret_key = await get_secret_key()
+    encoded_jwt = jwt.encode(to_encode, secret_key, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        secret_key = await get_secret_key()
+        payload = jwt.decode(token, secret_key, algorithms=[ALGORITHM])
+        username = payload.get("sub")
+        if username is None:
+            raise credentials_exception
+        token_data = TokenData(username=username)
+    except InvalidTokenError:
+        raise credentials_exception
+    user = await get_user_db(token_data.username)
+    if user is None:
+        raise credentials_exception
+    return user
+
+
+async def get_current_active_user(
+    current_user: Annotated[User, Depends(get_current_user)],
+):
+    if current_user.disabled:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user