138 lines
4.7 KiB
Python
138 lines
4.7 KiB
Python
from datetime import datetime, timedelta
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import jwt
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from fastapi import Depends, FastAPI, HTTPException
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from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
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from jwt import PyJWTError
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from passlib.context import CryptContext
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from starlette.status import HTTP_401_UNAUTHORIZED
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from .models import Token, TokenData, TicketCollection, User, UserInDB, NewCollection, NewUser, TicketCollectionDB
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from typing import List
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# to get a string like this run:
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# openssl rand -hex 32
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SECRET_KEY = "da06994dd99d0c3a01df358c9e9bcec40db567378c3bbd47e10661d5fd8d7359"
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/token")
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app = FastAPI(title="Ticket Backend",
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description="The backend for the ticket scanner application",
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redoc_url=None)
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def verify_password(plain_password, hashed_password):
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return pwd_context.hash(password)
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async def get_user(username: str):
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try:
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return await UserInDB.objects.get(username=username)
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except:
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return None
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async def authenticate_user(username: str, password: str):
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user = await get_user(username)
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if not user:
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return False
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if not verify_password(password, user.hashed_password):
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return False
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return user
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def create_access_token(*, data: dict, expires_delta: timedelta = None):
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_current_user(token: str = Depends(oauth2_scheme)):
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credentials_exception = HTTPException(
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status_code=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, SECRET_KEY, algorithms=[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 PyJWTError:
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raise credentials_exception
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user = await get_user(username=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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async def get_current_active_user(current_user: User = Depends(get_current_user)):
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if current_user.disabled:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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@app.post("/token", response_model=Token)
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async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
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user = await authenticate_user(
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form_data.username, form_data.password)
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if not user:
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raise HTTPException(
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status_code=HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or password",
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headers={"WWW-Authenticate": "Bearer"},
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)
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access_token_expires = timedelta(minutes=30)
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access_token = create_access_token(
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data={"sub": user.username}, expires_delta=access_token_expires
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)
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return {"access_token": access_token, "token_type": "bearer"}
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@app.get("/users/me/", response_model=User)
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async def read_users_me(current_user: User = Depends(get_current_active_user)):
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return current_user
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@app.get("/users/me/items/")
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async def read_own_items(current_user: User = Depends(get_current_active_user)):
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return [{"item_id": "Foo", "owner": current_user.username}]
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@app.post("/users/new", response_model=User)
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async def add_new_user(them: NewUser):
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return await UserInDB.objects.create(username=them.username, hashed_password=get_password_hash(them.password), email=str(them.email), full_name=them.name)
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@app.post("/collections/new", response_model=TicketCollection)
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async def add_new_collection(collection: NewCollection, current_user: UserInDB = Depends(get_current_active_user)):
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return await TicketCollectionDB.objects.create(name=collection.name, user=current_user, price=int(collection.price*100), description=collection.description, requires_student=collection.requires_student)
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@app.get("/collections", response_model=List[TicketCollection])
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async def get_all_collections(current_user: User = Depends(get_current_active_user)):
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return await TicketCollectionDB.objects.filter(user=current_user).all()
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@app.on_event("startup")
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async def start():
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try:
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await UserInDB.objects.create(
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username="johndoe", hashed_password="$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW", email="johndoe@example.com", full_name="John Doe")
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except:
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pass
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