104 lines
2.7 KiB
Python
104 lines
2.7 KiB
Python
from datetime import datetime, timedelta
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from fastapi import APIRouter, Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
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from jose import JWTError, jwt
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from pydantic import BaseModel
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from sqlalchemy.orm import Session
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from ..config import Config, JWTConfig
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from ..db import Connection, schemas
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router = APIRouter(prefix="/user")
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SCHEME = OAuth2PasswordBearer(
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tokenUrl=f".{router.prefix}/auth",
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)
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class Token(BaseModel):
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access_token: str
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token_type: str
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class TokenData(BaseModel):
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username: str | None = None
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def create_access_token(
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data: dict,
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jwt_config: JWTConfig,
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expires_delta: timedelta | None = None,
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):
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to_encode = data.copy()
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if expires_delta is None:
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expires_delta = timedelta(minutes=jwt_config.expiry_minutes)
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to_encode.update({"exp": datetime.utcnow() + expires_delta})
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return jwt.encode(
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to_encode,
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jwt_config.secret,
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algorithm=jwt_config.hash_algorithm,
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)
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@router.post("/auth", response_model=Token)
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async def login(
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form_data: OAuth2PasswordRequestForm = Depends(),
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config: Config = Depends(Config.get),
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db: Session = Depends(Connection.get),
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):
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user = schemas.User.verify(
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db=db,
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name=form_data.username,
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password=form_data.password,
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crypt_context=config.crypt_context,
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)
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if user is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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access_token = create_access_token(
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data={"sub": user.name},
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jwt_config=config.jwt,
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)
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return {"access_token": access_token, "token_type": "bearer"}
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async def dep_get_current_user(
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token: str = Depends(SCHEME),
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db: Session = Depends(Connection.get),
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config: Config = Depends(Config.get),
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):
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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payload = jwt.decode(token, config.jwt.secret, algorithms=[
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config.jwt.hash_algorithm])
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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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token_data = TokenData(username=username)
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except JWTError:
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raise credentials_exception
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user = schemas.User.get(db, token_data.username)
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if user is None:
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raise credentials_exception
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return user
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@router.get("/current", response_model=schemas.User)
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async def get_current_user(
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current_user: schemas.User = Depends(dep_get_current_user),
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):
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return current_user
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