139 lines
4.0 KiB
Python
Executable File
139 lines
4.0 KiB
Python
Executable File
from datetime import datetime, timedelta
|
|
from typing import Optional
|
|
|
|
from fastapi import Depends, FastAPI, HTTPException, status
|
|
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
|
|
from jose import JWTError, jwt
|
|
from passlib.context import CryptContext
|
|
from pydantic import BaseModel
|
|
|
|
# to get a string like this run:
|
|
# openssl rand -hex 32
|
|
SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
|
|
ALGORITHM = "HS256"
|
|
ACCESS_TOKEN_EXPIRE_MINUTES = 30
|
|
|
|
|
|
fake_users_db = {
|
|
"johndoe": {
|
|
"username": "johndoe",
|
|
"full_name": "John Doe",
|
|
"email": "johndoe@example.com",
|
|
"hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
|
|
"disabled": False,
|
|
}
|
|
}
|
|
|
|
|
|
class Token(BaseModel):
|
|
access_token: str
|
|
token_type: str
|
|
|
|
|
|
class TokenData(BaseModel):
|
|
username: Optional[str] = None
|
|
|
|
|
|
class User(BaseModel):
|
|
username: str
|
|
email: Optional[str] = None
|
|
full_name: Optional[str] = None
|
|
disabled: Optional[bool] = None
|
|
|
|
|
|
class UserInDB(User):
|
|
hashed_password: str
|
|
|
|
|
|
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
|
|
|
|
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
|
|
|
|
app = FastAPI()
|
|
|
|
|
|
def verify_password(plain_password, hashed_password):
|
|
return pwd_context.verify(plain_password, hashed_password)
|
|
|
|
|
|
def get_password_hash(password):
|
|
return pwd_context.hash(password)
|
|
|
|
|
|
def get_user(db, username: str):
|
|
if username in db:
|
|
user_dict = db[username]
|
|
return UserInDB(**user_dict)
|
|
|
|
|
|
def authenticate_user(fake_db, username: str, password: str):
|
|
user = get_user(fake_db, username)
|
|
if not user:
|
|
return False
|
|
if not verify_password(password, user.hashed_password):
|
|
return False
|
|
return user
|
|
|
|
|
|
def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
|
|
to_encode = data.copy()
|
|
if expires_delta:
|
|
expire = datetime.utcnow() + expires_delta
|
|
else:
|
|
expire = datetime.utcnow() + timedelta(minutes=15)
|
|
to_encode.update({"exp": expire})
|
|
encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
|
|
return encoded_jwt
|
|
|
|
|
|
async def get_current_user(token: str = Depends(oauth2_scheme)):
|
|
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
|
|
token_data = TokenData(username=username)
|
|
except JWTError:
|
|
raise credentials_exception
|
|
user = get_user(fake_users_db, username=token_data.username)
|
|
if user is None:
|
|
raise credentials_exception
|
|
return user
|
|
|
|
|
|
async def get_current_active_user(current_user: User = Depends(get_current_user)):
|
|
if current_user.disabled:
|
|
raise HTTPException(status_code=400, detail="Inactive user")
|
|
return current_user
|
|
|
|
|
|
@app.post("/token", response_model=Token)
|
|
async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
|
|
user = authenticate_user(fake_users_db, form_data.username, form_data.password)
|
|
if not user:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
|
detail="Incorrect username or password",
|
|
headers={"WWW-Authenticate": "Bearer"},
|
|
)
|
|
access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
|
|
access_token = create_access_token(
|
|
data={"sub": user.username}, expires_delta=access_token_expires
|
|
)
|
|
return {"access_token": access_token, "token_type": "bearer"}
|
|
|
|
|
|
@app.get("/users/me/", response_model=User)
|
|
async def read_users_me(current_user: User = Depends(get_current_active_user)):
|
|
return current_user
|
|
|
|
|
|
@app.get("/users/me/items/")
|
|
async def read_own_items(current_user: User = Depends(get_current_active_user)):
|
|
return [{"item_id": "Foo", "owner": current_user.username}]
|