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75 lines
2.7 KiB
Python
75 lines
2.7 KiB
Python
"""Small, dependency-free helpers for retaining Computer Use evidence."""
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from __future__ import annotations
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import copy
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import hashlib
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import json
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import shutil
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from pathlib import Path
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from typing import Any
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def sha256_file(path: Path) -> str:
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digest = hashlib.sha256()
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with path.open("rb") as handle:
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for chunk in iter(lambda: handle.read(1024 * 1024), b""):
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digest.update(chunk)
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return digest.hexdigest()
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def write_json(path: Path, value: Any) -> None:
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path.parent.mkdir(parents=True, exist_ok=True)
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path.write_text(json.dumps(value, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
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def retain_step_screenshots(history_data: dict[str, Any], run_dir: Path) -> tuple[dict[str, Any], list[dict[str, Any]]]:
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"""Copy browser-use's temporary screenshots into the retained run.
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The returned history points to paths relative to ``run_dir``. Missing
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screenshots remain explicit records instead of being silently ignored.
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"""
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retained = copy.deepcopy(history_data)
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screenshot_dir = run_dir / "screenshots"
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records: list[dict[str, Any]] = []
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for index, item in enumerate(retained.get("history", []), start=1):
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state = item.get("state") or {}
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raw_path = state.get("screenshot_path")
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record: dict[str, Any] = {"step": index, "source_present": False, "path": None, "sha256": None}
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if raw_path:
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source = Path(raw_path).expanduser()
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record["source_present"] = source.is_file()
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if source.is_file():
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screenshot_dir.mkdir(parents=True, exist_ok=True)
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suffix = source.suffix if source.suffix else ".png"
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target = screenshot_dir / f"step-{index:03d}{suffix}"
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shutil.copyfile(source, target)
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relative = target.relative_to(run_dir).as_posix()
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state["screenshot_path"] = relative
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record.update({"path": relative, "sha256": sha256_file(target)})
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else:
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state["screenshot_path"] = None
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records.append(record)
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return retained, records
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def write_manifest(run_dir: Path, metadata: dict[str, Any]) -> Path:
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"""Hash every retained artifact except the manifest itself."""
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artifacts = []
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for path in sorted(run_dir.rglob("*")):
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if path.is_file() and path.name != "manifest.json":
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artifacts.append(
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{
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"path": path.relative_to(run_dir).as_posix(),
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"bytes": path.stat().st_size,
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"sha256": sha256_file(path),
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}
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)
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target = run_dir / "manifest.json"
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write_json(target, {"schema_version": 1, **metadata, "artifacts": artifacts})
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return target
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