Klapr.zip | Download

Raises ------ ZipDownloadError * Network or HTTP errors. * Checksum mismatch. * Invalid ZIP file or unsafe entries. """ # ------------------------------------------------------------------ # # 1️⃣ Resolve destination directory # ------------------------------------------------------------------ # if dest_dir is None: extract_path = Path(tempfile.mkdtemp(prefix="klapr_")) else: extract_path = Path(dest_dir).expanduser().resolve() extract_path.mkdir(parents=True, exist_ok=True)

# ------------------------------------------------------------------ # # 2️⃣ Prepare a temporary file for the download # ------------------------------------------------------------------ # temp_file = Path(tempfile.mkstemp(suffix=".zip")[1]) Download Klapr.zip

def _safe_extract(zip_path: Path, extract_to: Path) -> None: """ Extract a ZIP file while guarding against Zip Slip (path traversal) attacks. """ with zipfile.ZipFile(zip_path, "r") as zf: for member in zf.infolist(): # Resolve the target path and ensure it's inside `extract_to`. member_path = (extract_to / member.filename).resolve() if not str(member_path).startswith(str(extract_to.resolve())): raise ZipDownloadError( f"Unsafe member detected in zip: member.filename!r" ) # Create any needed directories. if member.is_dir(): member_path.mkdir(parents=True, exist_ok=True) continue # Ensure parent directories exist. member_path.parent.mkdir(parents=True, exist_ok=True) # Extract the file. with zf.open(member, "r") as source, member_path.open("wb") as target: shutil.copyfileobj(source, target) Raises ------ ZipDownloadError * Network or HTTP errors

try: # ------------------------------------------------------------------ # # 3️⃣ Stream download – we avoid loading the whole file into RAM. # ------------------------------------------------------------------ # with requests.get(url, stream=True, timeout=timeout) as r: r.raise_for_status() # raise HTTPError for bad status codes if member

def _calc_checksum(file_path: Path, algo: str = "sha256") -> str: """Calculate a checksum (`algo` can be 'md5', 'sha1', 'sha256', etc.).""" h = hashlib.new(algo) with file_path.open("rb") as f: for chunk in iter(lambda: f.read(8192), b""): h.update(chunk) return h.hexdigest()

def download_and_extract( url: str, *, dest_dir: Optional[Union[str, Path]] = None, checksum: Optional[str] = None, checksum_algo: str = "sha256", timeout: int = 30, chunk_size: int = 8192, ) -> Path: """ Download a ZIP archive from `url`, optionally verify its checksum, and safely extract it.

try: # Python 3.11+ has built‑in http client with async support, but for simplicity we use requests. import requests except ImportError as exc: raise ImportError( "The `requests` library is required for this helper. Install it with:\n" " pip install requests" ) from exc