Add basic FastAPI auth and React login gate

backend/app/auth.py

@@ -0,0 +1,43 @@
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from pydantic import BaseModel
+SECRET_KEY = 'change-me-in-production'
+ALGORITHM = 'HS256'
+ACCESS_TOKEN_EXPIRE_MINUTES = 120
+pwd_context = CryptContext(schemes=['bcrypt'], deprecated='auto')
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl='/auth/token')
+class Token(BaseModel): access_token: str; token_type: str = 'bearer'
+class TokenData(BaseModel): username: Optional[str] = None
+class User(BaseModel): username: str; disabled: bool = False; role: str = 'viewer'
+class UserInDB(User): hashed_password: str
+fake_users_db = {'admin': {'username': 'admin', 'hashed_password': pwd_context.hash('admin123'), 'disabled': False, 'role': 'admin'}, 'viewer': {'username': 'viewer', 'hashed_password': pwd_context.hash('viewer123'), 'disabled': False, 'role': 'viewer'}}
+def verify_password(plain_password: str, hashed_password: str) -> bool: return pwd_context.verify(plain_password, hashed_password)
+def get_user(username: str) -> Optional[UserInDB]:
+    user = fake_users_db.get(username)
+    return UserInDB(**user) if user else None
+def authenticate_user(username: str, password: str) -> Optional[UserInDB]:
+    user = get_user(username)
+    return user if user and verify_password(password, user.hashed_password) else None
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    to_encode = data.copy()
+    expire = datetime.now(timezone.utc) + (expires_delta or timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES))
+    to_encode.update({'exp': expire})
+    return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+def get_current_user(token: str = Depends(oauth2_scheme)) -> User:
+    credentials_exception = HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail='Could not validate credentials', headers={'WWW-Authenticate': 'Bearer'})
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        username: str = payload.get('sub')
+        if username is None: raise credentials_exception
+    except JWTError:
+        raise credentials_exception
+    user = get_user(username)
+    if user is None: raise credentials_exception
+    return User(username=user.username, disabled=user.disabled, role=user.role)
+def get_current_active_user(current_user: User = Depends(get_current_user)) -> User:
+    if current_user.disabled: raise HTTPException(status_code=400, detail='Inactive user')
+    return current_user

backend/app/main.py

@@ -1,26 +1,9 @@
 from fastapi import FastAPI
-from fastapi.middleware.cors import CORSMiddleware
+from app.routes.auth import router as auth_router
 
-from app.routers.discoveries import router as discoveries_router
-from app.routers.health import router as health_router
-from app.routers.inventory import router as inventory_router
-from app.routers.jobs import router as jobs_router
-from app.routers.objects import router as objects_router
-from app.routers.relations import router as relations_router
+app = FastAPI(title='NetMapper API')
+app.include_router(auth_router)
 
-app = FastAPI(title='NetMapper Backend', version='0.1.0')
-
-app.add_middleware(
-    CORSMiddleware,
-    allow_origins=['*'],
-    allow_credentials=True,
-    allow_methods=['*'],
-    allow_headers=['*'],
-)
-
-app.include_router(health_router)
-app.include_router(objects_router)
-app.include_router(jobs_router)
-app.include_router(discoveries_router)
-app.include_router(inventory_router)
-app.include_router(relations_router)
+@app.get('/health')
+async def health():
+    return {'status': 'ok'}

backend/app/routes/auth.py

@@ -0,0 +1,14 @@
+from datetime import timedelta
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from app.auth import ACCESS_TOKEN_EXPIRE_MINUTES, Token, authenticate_user, create_access_token, get_current_active_user
+router = APIRouter(prefix='/auth', tags=['auth'])
+@router.post('/token', response_model=Token)
+async def login(form_data: OAuth2PasswordRequestForm = Depends()):
+    user = authenticate_user(form_data.username, form_data.password)
+    if not user: raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail='Incorrect username or password')
+    access_token = create_access_token({'sub': user.username, 'role': user.role}, timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES))
+    return Token(access_token=access_token)
+@router.get('/me')
+async def me(current_user=Depends(get_current_active_user)):
+    return {'username': current_user.username, 'role': current_user.role, 'disabled': current_user.disabled}

backend/requirements.txt

@@ -1,6 +1,5 @@
-fastapi==0.115.0
-uvicorn[standard]==0.30.6
-pydantic==2.9.2
-sqlalchemy==2.0.35
-psycopg[binary]==3.2.3
-redis==5.1.1
+fastapi
+uvicorn[standard]
+python-jose[cryptography]
+passlib[bcrypt]
+python-multipart