Filesystem MCP Server

"""Utility functions for path validation.""" from pathlib import Path ALLOWED_ROOT: Path | None = None def validate_path(relative_path: str) -> Path: """Validate and resolve a path against the allowed root directory. Args: relative_path: Path relative to the allowed root Returns: Resolved absolute path Raises: ValueError: If path is outside allowed root or ALLOWED_ROOT not set """ if ALLOWED_ROOT is None: raise ValueError("Server not properly initialized: ALLOWED_ROOT not set") full_path = ALLOWED_ROOT / relative_path resolved = full_path.resolve() allowed = ALLOWED_ROOT.resolve() if not str(resolved).startswith(str(allowed)): raise ValueError(f"Path '{relative_path}' is outside allowed root directory") return resolved