bruno
47463a62e0
CSRF middleware now excludes /auth/register, /auth/local-login, /api/user, and /api/workspace paths. Login page doesn't have CSRF token so registration and settings operations were blocked.
50 lines
1.9 KiB
Python
50 lines
1.9 KiB
Python
"""FlowDeck — CSRF protection middleware."""
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from __future__ import annotations
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import secrets
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from starlette.middleware.base import BaseHTTPMiddleware
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from starlette.responses import JSONResponse
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from starlette.requests import Request
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class CSRFMiddleware(BaseHTTPMiddleware):
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"""Lightweight CSRF protection for state-changing requests.
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All POST/PUT/PATCH/DELETE requests must include X-CSRF-Token
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header matching the csrf_token cookie.
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"""
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SAFE_METHODS = {"GET", "HEAD", "OPTIONS"}
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EXCLUDED_PATHS = {"/api/webhook", "/api/v1", "/auth/callback", "/auth/register", "/auth/local-login", "/api/user", "/board/api/pages", "/board/api/favorites", "/api/workspace", "/db/", "/workspace"}
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async def dispatch(self, request: Request, call_next):
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# Webhook receiver, OAuth callback, and internal API are exempt
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if any(request.url.path.startswith(p) for p in self.EXCLUDED_PATHS):
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return await call_next(request)
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if request.method in self.SAFE_METHODS:
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response = await call_next(request)
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# Set CSRF cookie if not present
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if "csrf_token" not in request.cookies:
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response.set_cookie(
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"csrf_token",
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secrets.token_hex(32),
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httponly=False, # Must be readable by JS
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samesite="lax",
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max_age=86400,
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)
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return response
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# Validate CSRF for state-changing methods
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csrf_cookie = request.cookies.get("csrf_token", "")
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csrf_header = request.headers.get("X-CSRF-Token", "")
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if not csrf_cookie or not csrf_header or not secrets.compare_digest(csrf_cookie, csrf_header):
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return JSONResponse(
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{"detail": "CSRF validation failed"},
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status_code=403,
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)
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return await call_next(request)
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