Initial commit: WordLoop 单词学习应用

Vue 前端 + FastAPI 后端，含部署脚本与词典数据。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/auth.py

@@ -0,0 +1,56 @@
+import os
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+
+import bcrypt
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from jose import JWTError, jwt
+from sqlalchemy.orm import Session
+
+from database import get_db
+from models import User
+
+SECRET_KEY = os.getenv("WORDLOOP_SECRET_KEY", "wordloop-dev-secret-change-in-production")
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 * 7
+
+security = HTTPBearer()
+
+
+def hash_password(password: str) -> str:
+    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return bcrypt.checkpw(plain.encode("utf-8"), hashed.encode("utf-8"))
+
+
+def create_access_token(user_id: int, username: str) -> str:
+    expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    payload = {"sub": str(user_id), "username": username, "exp": expire}
+    return jwt.encode(payload, SECRET_KEY, algorithm=ALGORITHM)
+
+
+def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: Session = Depends(get_db),
+) -> User:
+    token = credentials.credentials
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="无效或过期的登录凭证",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        user_id: Optional[str] = payload.get("sub")
+        if user_id is None:
+            raise credentials_exception
+    except JWTError:
+        raise credentials_exception
+
+    user = db.query(User).filter(User.id == int(user_id)).first()
+    if user is None:
+        raise credentials_exception
+    return user