136 lines
5.0 KiB
Python
136 lines
5.0 KiB
Python
from __future__ import annotations
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import re
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from pathlib import Path
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from yuxi import config as conf
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from yuxi.utils.paths import OUTPUTS_DIR_NAME, UPLOADS_DIR_NAME, VIRTUAL_PATH_PREFIX, WORKSPACE_DIR_NAME
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_SAFE_ID_RE = re.compile(r"^[A-Za-z0-9_-]+$")
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def get_virtual_path_prefix() -> str:
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return "/" + VIRTUAL_PATH_PREFIX.strip("/")
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def _validate_thread_id(thread_id: str) -> str:
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value = str(thread_id or "").strip()
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if not value:
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raise ValueError("thread_id is required")
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if not _SAFE_ID_RE.match(value):
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raise ValueError("thread_id contains invalid characters")
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return value
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def _thread_root_dir(thread_id: str) -> Path:
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safe_thread_id = _validate_thread_id(thread_id)
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return Path(conf.save_dir) / "threads" / safe_thread_id / "user-data"
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def _validate_user_id(user_id: str) -> str:
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value = str(user_id or "").strip()
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if not value:
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raise ValueError("user_id is required")
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if not _SAFE_ID_RE.match(value):
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raise ValueError("user_id contains invalid characters")
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return value
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def _global_user_data_dir(user_id: str) -> Path:
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"""Return the shared host-side directory used for one user's workspace files."""
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safe_user_id = _validate_user_id(user_id)
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return Path(conf.save_dir) / "threads" / "shared" / safe_user_id
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def sandbox_user_data_dir(thread_id: str) -> Path:
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return _thread_root_dir(thread_id)
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def sandbox_workspace_dir(thread_id: str, user_id: str) -> Path:
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_validate_thread_id(thread_id)
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return _global_user_data_dir(user_id) / WORKSPACE_DIR_NAME
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def sandbox_uploads_dir(thread_id: str) -> Path:
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return _thread_root_dir(thread_id) / UPLOADS_DIR_NAME
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def sandbox_outputs_dir(thread_id: str) -> Path:
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return _thread_root_dir(thread_id) / OUTPUTS_DIR_NAME
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def ensure_thread_dirs(thread_id: str, user_id: str) -> None:
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_global_user_data_dir(user_id).mkdir(parents=True, exist_ok=True)
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sandbox_workspace_dir(thread_id, user_id).mkdir(parents=True, exist_ok=True)
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sandbox_uploads_dir(thread_id).mkdir(parents=True, exist_ok=True)
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sandbox_outputs_dir(thread_id).mkdir(parents=True, exist_ok=True)
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def _resolve_user_data_base_dir(thread_id: str, user_id: str, relative_path: str) -> tuple[Path, Path]:
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"""Map a virtual user-data path to the correct host-side base directory."""
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parts = Path(relative_path).parts
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if not parts:
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base_dir = sandbox_user_data_dir(thread_id)
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return base_dir.resolve(), base_dir.resolve()
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namespace = parts[0]
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if namespace == WORKSPACE_DIR_NAME:
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# Workspace is shared across one user's threads, so it lives outside the per-thread root.
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base_dir = sandbox_workspace_dir(thread_id, user_id)
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target_path = base_dir.joinpath(*parts[1:]) if len(parts) > 1 else base_dir
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return base_dir.resolve(), target_path.resolve()
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if namespace == UPLOADS_DIR_NAME:
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base_dir = sandbox_uploads_dir(thread_id)
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target_path = base_dir.joinpath(*parts[1:]) if len(parts) > 1 else base_dir
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return base_dir.resolve(), target_path.resolve()
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if namespace == OUTPUTS_DIR_NAME:
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base_dir = sandbox_outputs_dir(thread_id)
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target_path = base_dir.joinpath(*parts[1:]) if len(parts) > 1 else base_dir
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return base_dir.resolve(), target_path.resolve()
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base_dir = sandbox_user_data_dir(thread_id)
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return base_dir.resolve(), (base_dir / relative_path).resolve()
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def resolve_virtual_path(thread_id: str, virtual_path: str, *, user_id: str) -> Path:
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clean_virtual_path = "/" + str(virtual_path or "").strip().lstrip("/")
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virtual_prefix = get_virtual_path_prefix()
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if clean_virtual_path != virtual_prefix and not clean_virtual_path.startswith(f"{virtual_prefix}/"):
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raise ValueError(f"path must start with {virtual_prefix}")
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relative_path = clean_virtual_path[len(virtual_prefix) :].lstrip("/")
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base_dir, target_path = _resolve_user_data_base_dir(thread_id, user_id, relative_path)
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try:
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target_path.relative_to(base_dir)
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except ValueError as exc:
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raise ValueError("path traversal detected") from exc
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return target_path
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def virtual_path_for_thread_file(thread_id: str, path: str | Path, *, user_id: str) -> str:
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target_path = Path(path).resolve()
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thread_root = sandbox_user_data_dir(thread_id).resolve()
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global_workspace_root = sandbox_workspace_dir(thread_id, user_id).resolve()
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try:
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relative_path = target_path.relative_to(global_workspace_root)
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except ValueError:
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try:
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relative_path = target_path.relative_to(thread_root)
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except ValueError as exc:
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raise ValueError("file is outside allowed user-data directories") from exc
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relative_path_str = relative_path.as_posix()
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else:
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workspace_relative = relative_path.as_posix()
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relative_path_str = (
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WORKSPACE_DIR_NAME if workspace_relative in {"", "."} else f"{WORKSPACE_DIR_NAME}/{workspace_relative}"
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)
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prefix = get_virtual_path_prefix().rstrip("/")
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if not relative_path_str:
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return prefix
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return f"{prefix}/{relative_path_str}"
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