Загрузить файлы в «app»

app/auth.py

@@ -0,0 +1,77 @@
+import secrets
+from datetime import datetime, timedelta
+
+import bcrypt
+from fastapi import Depends, HTTPException, Request, status
+from sqlalchemy.orm import Session as DbSession
+
+from app.config import settings
+from app.database import get_db
+from app.models import Session, User
+
+SESSION_COOKIE = "session_token"
+
+
+def hash_password(password: str) -> str:
+    return bcrypt.hashpw(password.encode(), bcrypt.gensalt()).decode()
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return bcrypt.checkpw(plain.encode(), hashed.encode())
+
+
+def create_session_token() -> str:
+    return secrets.token_urlsafe(32)
+
+
+def create_user_session(db: DbSession, user: User) -> Session:
+    token = create_session_token()
+    expires_at = datetime.utcnow() + timedelta(hours=settings.session_lifetime_hours)
+    session = Session(user_id=user.id, token=token, expires_at=expires_at)
+    db.add(session)
+    db.commit()
+    db.refresh(session)
+    return session
+
+
+def get_session_by_token(db: DbSession, token: str) -> Session | None:
+    session = db.query(Session).filter(Session.token == token, Session.is_active.is_(True)).first()
+    if not session:
+        return None
+    if session.expires_at < datetime.utcnow():
+        session.is_active = False
+        db.commit()
+        return None
+    return session
+
+
+def get_current_user(request: Request, db: DbSession = Depends(get_db)) -> User:
+    token = request.cookies.get(SESSION_COOKIE)
+    if not token:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Not authenticated")
+    session = get_session_by_token(db, token)
+    if not session:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Session expired")
+    user = db.query(User).filter(User.id == session.user_id).first()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="User not found")
+    return user
+
+
+def get_current_user_optional(request: Request, db: DbSession = Depends(get_db)) -> User | None:
+    token = request.cookies.get(SESSION_COOKIE)
+    if not token:
+        return None
+    session = get_session_by_token(db, token)
+    if not session:
+        return None
+    return db.query(User).filter(User.id == session.user_id).first()
+
+
+def verify_api_key(request: Request) -> None:
+    auth = request.headers.get("Authorization", "")
+    if not auth.startswith("Bearer "):
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid API key")
+    key = auth.removeprefix("Bearer ").strip()
+    if not secrets.compare_digest(key, settings.api_key):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Invalid API key")