35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
"""FastAPI dependencies for authentication and security."""
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from fastapi import Request, HTTPException
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from app.auth.session import verify_session
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from app.config import settings
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def get_current_user(request: Request) -> int:
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"""
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Dependency that extracts and validates the session cookie.
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Raises 401 if missing or invalid.
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Returns the user_id.
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"""
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token = request.cookies.get(settings.COOKIE_NAME)
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if not token:
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raise HTTPException(status_code=401, detail="Not authenticated")
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user_id = verify_session(token)
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if not user_id:
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raise HTTPException(status_code=401, detail="Session expired or invalid")
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return user_id
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def verify_csrf(request: Request) -> None:
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"""
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Dependency to mitigate CSRF for cookie-based auth.
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Requires X-Requested-With header on all mutating requests.
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"""
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if request.method in ["POST", "PUT", "PATCH", "DELETE"]:
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if request.headers.get("X-Requested-With") != "XMLHttpRequest":
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raise HTTPException(
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status_code=403,
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detail="CSRF check failed: missing X-Requested-With header"
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)
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