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f02c5b9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | """Authentication with Clerk."""
from fastapi import Request, HTTPException, status, Depends
from sqlalchemy.orm import Session
from app.models import User
from app.config import get_settings
from app.database import get_db
import httpx
import logging
import jwt
from jwt import PyJWKClient
logger = logging.getLogger(__name__)
settings = get_settings()
# Initialize JWKS client for token verification
jwks_client = PyJWKClient(settings.CLERK_JWKS_URL)
async def get_current_user(
request: Request,
db: Session = Depends(get_db)
) -> User:
"""Get current authenticated user from Clerk token."""
# Extract Bearer token
auth_header = request.headers.get("Authorization")
if not auth_header or not auth_header.startswith("Bearer "):
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Missing authentication"
)
token = auth_header.replace("Bearer ", "")
try:
# Get signing key from JWKS
signing_key = jwks_client.get_signing_key_from_jwt(token)
# Verify and decode token
payload = jwt.decode(
token,
signing_key.key,
algorithms=["RS256"],
options={"verify_exp": True}
)
# Extract user info from token
clerk_user_id = payload.get("sub")
if not clerk_user_id:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Invalid token data"
)
# Get user details from Clerk API
async with httpx.AsyncClient() as client:
response = await client.get(
f"{settings.CLERK_API_URL}/users/{clerk_user_id}",
headers={
"Authorization": f"Bearer {settings.CLERK_SECRET_KEY}"
}
)
if response.status_code != 200:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Failed to fetch user data"
)
user_data = response.json()
# Extract email and org
email = None
if user_data.get("email_addresses"):
email = user_data["email_addresses"][0].get("email_address")
org_id = user_data.get("organization_id", "default")
if not email:
email = f"{clerk_user_id}@clerk.user"
# Get or create user in database
user = db.query(User).filter(User.clerk_user_id == clerk_user_id).first()
if not user:
user = User(
clerk_user_id=clerk_user_id,
email=email,
org_id=org_id
)
db.add(user)
db.commit()
db.refresh(user)
logger.info(f"Created new user: {email}")
return user
except jwt.ExpiredSignatureError:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Token has expired"
)
except jwt.InvalidTokenError as e:
logger.error(f"Invalid token: {e}")
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Invalid token"
)
except HTTPException:
raise
except Exception as e:
logger.error(f"Authentication error: {e}")
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Authentication failed"
)
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