首次提交by MimoCode

backend/app/core/deps.py

@@ -0,0 +1,60 @@
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.core.security import decode_access_token
+
+security = HTTPBearer()
+
+
+async def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: AsyncSession = Depends(get_db)
+):
+    from app.services.user import UserService
+    from app.models.user import User
+
+    token = credentials.credentials
+    payload = decode_access_token(token)
+
+    if payload is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="无效的认证令牌"
+        )
+
+    user_id = payload.get("sub")
+    if user_id is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="无效的认证令牌"
+        )
+
+    user_service = UserService(db)
+    user = await user_service.get_user(int(user_id))
+
+    if user is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="用户不存在"
+        )
+
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="用户已被禁用"
+        )
+
+    return user
+
+
+def require_role(roles: list[str]):
+    async def role_checker(current_user=Depends(get_current_user)):
+        if current_user.role not in roles:
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail="权限不足"
+            )
+        return current_user
+    return role_checker

backend/app/core/exceptions.py

@@ -0,0 +1,47 @@
+from fastapi import Request, HTTPException
+from fastapi.responses import JSONResponse
+
+
+class AppException(Exception):
+    def __init__(self, code: int, message: str, detail: any = None):
+        self.code = code
+        self.message = message
+        self.detail = detail
+
+
+async def app_exception_handler(request: Request, exc: AppException):
+    return JSONResponse(
+        status_code=200,
+        content={
+            "code": exc.code,
+            "message": exc.message,
+            "detail": exc.detail
+        }
+    )
+
+
+async def http_exception_handler(request: Request, exc: HTTPException):
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={
+            "code": exc.status_code,
+            "message": exc.detail
+        }
+    )
+
+
+async def general_exception_handler(request: Request, exc: Exception):
+    return JSONResponse(
+        status_code=500,
+        content={
+            "code": 500,
+            "message": "服务器内部错误"
+        }
+    )
+
+
+def register_exception_handlers(app):
+    from fastapi import FastAPI
+    app.add_exception_handler(AppException, app_exception_handler)
+    app.add_exception_handler(HTTPException, http_exception_handler)
+    app.add_exception_handler(Exception, general_exception_handler)

backend/app/core/security.py

@@ -0,0 +1,35 @@
+from datetime import datetime, timedelta
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+
+from app.config import settings
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(hours=settings.JWT_EXPIRATION_HOURS)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, settings.JWT_SECRET_KEY, algorithm=settings.JWT_ALGORITHM)
+    return encoded_jwt
+
+
+def decode_access_token(token: str) -> Optional[dict]:
+    try:
+        payload = jwt.decode(token, settings.JWT_SECRET_KEY, algorithms=[settings.JWT_ALGORITHM])
+        return payload
+    except JWTError:
+        return None