95 lines
3.4 KiB
Python
95 lines
3.4 KiB
Python
# -*- coding = utf-8 -*-
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# @Time : 2025/2/17 下午8:14
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# @File : services.py
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# @Software : PyCharm
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# @Author : xingc
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# @Desc :
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from datetime import datetime, timedelta
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from typing import Annotated, Optional
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import jwt
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import ujson
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from fastapi import HTTPException, status, Depends, Request, WebSocket
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from fastapi.security import OAuth2PasswordBearer
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import redis.asyncio as aioredis
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from sqlalchemy.ext.asyncio import AsyncSession
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from config import settings
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from core.db.crud import CRUD
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from core.db.engine import get_async_session, get_cache
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from core.db.models import User
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from core.utils.helper import generate_keyname
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from . import schema
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
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def create_access_token(data: dict):
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to_encode = data.copy()
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expire = datetime.utcnow() + timedelta(
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minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
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)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, settings.ACCESS_SECRET_KEY, algorithm=settings.ALGORITHM)
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return {'token_type': 'bearer', 'access_token': encoded_jwt}
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def verify_access_token(token: str):
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try:
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# payload = jwt.decode(token, settings.ACCESS_SECRET_KEY, algorithms=[settings.ALGORITHM])
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payload = jwt.decode(token, settings.ACCESS_SECRET_KEY, algorithms=[settings.ALGORITHM])
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return payload
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except jwt.ExpiredSignatureError:
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Token has expired")
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except jwt.InvalidTokenError:
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
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async def get_current_user(
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token: str | None, db_session: AsyncSession, redis_conn: aioredis
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) -> schema.LoginUser:
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"""验证登录状态、获取的用户基础信息"""
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result = verify_access_token(token)
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user_id = result.get("sub")
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if user_id is None:
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
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keyname = generate_keyname('login_cache', use_today=True)
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user_str = await redis_conn.hget(keyname, user_id)
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if user_str is None:
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user_model = await CRUD(db_session, User).get(filters={'user_id': user_id})
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user = schema.LoginUser(**user_model.dict())
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await redis_conn.hset(keyname, user_id, user.json())
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else:
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user = schema.LoginUser(**ujson.decode(user_str))
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return user
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async def get_current_user_form_http(
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token: Annotated[str, Depends(oauth2_scheme)],
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db_session: Annotated[AsyncSession, Depends(get_async_session)],
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redis_conn: aioredis = Depends(get_cache),
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) -> schema.LoginUser:
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"""在http headers中提取token，并验证再获取当前用户"""
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user = await get_current_user(token, db_session, redis_conn)
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return user
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async def get_current_user_form_ws(
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websocket: WebSocket,
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db_session: Annotated[AsyncSession, Depends(get_async_session)] = None,
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redis_conn: aioredis = Depends(get_cache),
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) -> schema.LoginUser:
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"""在ws headers中提取token，并验证再获取当前用户"""
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auth_header = websocket.headers.get("authorization") or websocket.headers.get("Authorization")
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if auth_header and auth_header.lower().startswith("bearer "):
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token = auth_header.removeprefix("bearer ").strip()
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else:
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token = ''
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user = await get_current_user(token, db_session, redis_conn)
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return user
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