self._pdf_path = target_path return target_path
# ------------------------------------------------------------------ # Utility # ------------------------------------------------------------------ @staticmethod def _derive_filename_from_url(url: str) -> str: """ Pull the last path component from the URL. Guarantees a ``.pdf`` suffix. """ parsed = urllib.parse.urlparse(url) name = os.path.basename(parsed.path) if not name.lower().endswith(".pdf"): # Either the URL lacked a filename or it wasn't a PDF – fall back name = "downloaded.pdf" return name
$ python downloader.py \ --check-folder ./some_folder \ --pdf-url https://example.com/2_by_kedibone.pdf \ --save-folder ./downloads \ --open if only 2 by kedibone pdf download
# Basic validation (fail early) if not self.check_folder.is_dir(): raise NotADirectoryError(f"Check folder does not exist or is not a directory: self.check_folder")
# ---------------------------------------------------------------------- # CLI entry point (optional but handy) # ---------------------------------------------------------------------- def _cli() -> None: """ Minimal command‑line interface. if count
if count != self.expected_count: item_list = "\n".join(f" • p.name" for p in items) or " <empty>" raise RuntimeError( f"Pre‑condition failed: Expected self.expected_count items in " f"`self.check_folder` but found count.\n" f"Current contents:\nitem_list" )
# 3️⃣ Save ----------------------------------------------------------- def _save_pdf(self, pdf_bytes: Tuple[bytes, float, int]) -> pathlib.Path: """ Persists the PDF to ``self.save_folder`` using ``self.filename``. Returns the absolute path of the saved file. """ content, _, _ = pdf_bytes self.save_folder.mkdir(parents=True, exist_ok=True) """ try: self
# Write atomically – write to a temporary file then rename tmp_path = target_path.with_suffix(".tmp") try: with open(tmp_path, "wb") as f: f.write(content) tmp_path.replace(target_path) # atomic on POSIX, safe on Windows too finally: # Clean up any stray temp file on failure if tmp_path.exists(): tmp_path.unlink(missing_ok=True)
Returns ------- DownloadResult A tiny data‑class describing success/failure and extra context. """ try: self._ensure_precondition() pdf_bytes = self._download_pdf() saved_path = self._save_pdf(pdf_bytes) if self.open_after_download: self._open_file(saved_path)