fastapi_jwt/
├── main.py
├── database.py
├── models.py
├── schemas.py
├── auth.py
├── create_db.py
├── requirements.txt
└── test.db  # criado automaticamente

pip install fastapi uvicorn sqlalchemy pydantic python-jose[cryptography] passlib[bcrypt]

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base

DATABASE_URL = "sqlite:///./test.db"
engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)
Base = declarative_base()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

from datetime import datetime, timedelta
from jose import JWTError, jwt
from passlib.context import CryptContext
from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from sqlalchemy.orm import Session
from models import User
from database import get_db

SECRET_KEY = "secret-jwt-key"  # Troque isso em produção
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="login")

def hash_password(password: str):
    return pwd_context.hash(password)

def verify_password(plain_password, hashed_password):
    return pwd_context.verify(plain_password, hashed_password)

def create_access_token(data: dict, expires_delta: timedelta = None):
    to_encode = data.copy()
    expire = datetime.utcnow() + (expires_delta or timedelta(minutes=15))
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)

def get_current_user(token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)):
    credentials_exception = HTTPException(
        status_code=status.HTTP_401_UNAUTHORIZED,
        detail="Credenciais inválidas",
        headers={"WWW-Authenticate": "Bearer"},
    )
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        user_id: int = payload.get("sub")
        if user_id is None:
            raise credentials_exception
    except JWTError:
        raise credentials_exception
    user = db.query(User).filter(User.id == user_id).first()
    if user is None:
        raise credentials_exception
    return user

from sqlalchemy import Column, Integer, String
from database import Base

class User(Base):
    __tablename__ = "users"
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String)
    email = Column(String, unique=True, index=True)
    password = Column(String)

from pydantic import BaseModel, EmailStr

class UserCreate(BaseModel):
    name: str
    email: EmailStr
    password: str

class UserLogin(BaseModel):
    email: EmailStr
    password: str

class UserResponse(BaseModel):
    id: int
    name: str
    email: EmailStr
    class Config:
        from_attributes = True

class Token(BaseModel):
    access_token: str
    token_type: str

from database import Base, engine
from models import User

Base.metadata.create_all(bind=engine)

from fastapi import FastAPI, Depends, HTTPException, status
from sqlalchemy.orm import Session
from fastapi.security import OAuth2PasswordRequestForm

from database import get_db
from models import User
from schemas import UserCreate, UserResponse, UserLogin, Token
from auth import hash_password, verify_password, create_access_token, get_current_user

app = FastAPI(title="API com JWT + SQLite", version="1.0.0")

@app.post("/register", response_model=UserResponse)
def register(user: UserCreate, db: Session = Depends(get_db)):
    existing = db.query(User).filter(User.email == user.email).first()
    if existing:
        raise HTTPException(status_code=400, detail="E-mail já cadastrado")
    hashed = hash_password(user.password)
    db_user = User(name=user.name, email=user.email, password=hashed)
    db.add(db_user)
    db.commit()
    db.refresh(db_user)
    return db_user

@app.post("/login", response_model=Token)
def login(form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)):
    user = db.query(User).filter(User.email == form_data.username).first()
    if not user or not verify_password(form_data.password, user.password):
        raise HTTPException(status_code=401, detail="Credenciais inválidas")
    token = create_access_token(data={"sub": str(user.id)})
    return {"access_token": token, "token_type": "bearer"}

@app.get("/me", response_model=UserResponse)
def read_current_user(current_user: User = Depends(get_current_user)):
    return current_user

python create_db.py

uvicorn main:app --reload