Akiba So
fc468464b2
Context: Build a spatial risk assessment system correlating air quality data with children's respiratory disease incidence across Wuhan. Approach: FastAPI backend serving PostGIS spatial queries, React frontend with Deck.gl maps, and a PyTorch SpatialTemporalGCN pipeline for multi-day (1d/3d/7d) risk prediction. Changes: - backend/ — FastAPI API with auth (JWT), alerts, risk analysis, geocoded case data, grid statistics, and report endpoints - frontend/ — React dashboard with interactive risk maps, alert monitoring, district comparison charts, and timeline player - models/ — SpatialTemporalGCN model with trained weights and ONNX export for inference - scripts/ — ETL pipeline for weather + medical data, grid generation, feature engineering, training, and daily inference - deploy/ — Docker Compose configs for backend, frontend, and MLflow - docs/ — API docs, deployment guide, user guide, and code review Impact: Enables spatial risk visualization, alert monitoring, and ML-driven health risk forecasting for environmental health teams.
67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
"""JWT token creation and password hashing utilities."""
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import os
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import logging
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from datetime import datetime, timedelta, timezone
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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logger = logging.getLogger("cbpoa.auth")
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SECRET_KEY = os.getenv("AUTH_SECRET_KEY", "cbpoa-dev-secret-change-in-production")
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = int(os.getenv("AUTH_TOKEN_EXPIRE_MINUTES", "480"))
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# In-memory user store (replace with DB table when auth matures)
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_users: dict[str, str] = {}
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def seed_default_admin() -> None:
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"""Create default admin user if no users exist."""
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if not _users:
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default_user = os.getenv("AUTH_DEFAULT_USER", "admin")
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default_pass = os.getenv("AUTH_DEFAULT_PASSWORD", "admin123")
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_users[default_user] = pwd_context.hash(default_pass)
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logger.info("Seeded default user '%s'", default_user)
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def verify_password(plain: str, hashed: str) -> bool:
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return pwd_context.verify(plain, hashed)
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def hash_password(password: str) -> str:
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return pwd_context.hash(password)
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def authenticate_user(username: str, password: str) -> bool:
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hashed = _users.get(username)
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if not hashed:
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return False
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return verify_password(password, hashed)
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def create_user(username: str, password: str) -> bool:
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"""Register a new user. Returns False if username already exists."""
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if username in _users:
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return False
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_users[username] = hash_password(password)
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logger.info("Registered new user '%s'", username)
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return True
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def create_access_token(data: dict) -> str:
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to_encode = data.copy()
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expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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def decode_access_token(token: str) -> dict | None:
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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return payload
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except JWTError:
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return None
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