在 Python SDK 中从 PDF 提取附件

    import shutil
    import json
    import logging
    from pathlib import Path
    from asposepdfcloud import ApiClient, PdfApi, AttachmentsResponse, AttachmentResponse, Attachment

    # Configure logging
    logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")

    class Config:
        """Configuration parameters."""
        CREDENTIALS_FILE = Path(r"C:\\Projects\\ASPOSE\\Pdf.Cloud\\Credentials\\credentials.json")
        LOCAL_FOLDER = Path(r"C:\Samples")
        PDF_DOCUMENT_NAME = "sample_file_with_attachment.pdf"
        ATTACHMENT_PATH = ""

    class PdfAttachments:
        """Class for managing PDF attachments using Aspose PDF Cloud API."""
        def __init__(self, credentials_file: Path = Config.CREDENTIALS_FILE):
            self.pdf_api = None
            self._init_api(credentials_file)

        def _init_api(self, credentials_file: Path):
            """Initialize the API client."""
            try:
                with credentials_file.open("r", encoding="utf-8") as file:
                    credentials = json.load(file)
                    api_key, app_id = credentials.get("key"), credentials.get("id")
                    if not api_key or not app_id:
                        raise ValueError("init_api(): Error: Missing API keys in the credentials file.")
                    self.pdf_api = PdfApi(ApiClient(api_key, app_id))
            except (FileNotFoundError, json.JSONDecodeError, ValueError) as e:
                logging.error(f"init_api(): Failed to load credentials: {e}")

        def upload_document(self):
            """Upload a PDF document to the Aspose Cloud server."""
            if self.pdf_api:
                file_path = Config.LOCAL_FOLDER / Config.PDF_DOCUMENT_NAME
                try:
                    self.pdf_api.upload_file(Config.PDF_DOCUMENT_NAME, str(file_path))
                    logging.info(f"upload_document(): File {Config.PDF_DOCUMENT_NAME} uploaded successfully.")
                except Exception as e:
                    logging.error(f"upload_document(): Failed to upload file: {e}")

        def get_attachments(self):
            """Get attachments for the PDF document."""
            if self.pdf_api:
                try:
                    response : AttachmentsResponse = self.pdf_api.get_document_attachments(Config.PDF_DOCUMENT_NAME)
                    if response.code == 200:
                        logging.info(f"get_attachmnets(): attachments '{response.attachments}' for the document '{Config.PDF_DOCUMENT_NAME}'.")
                        Config.ATTACHMENT_PATH = response.attachments.list[0].links[0].href
                    else:
                        logging.error(f"get_attachmnets(): Failed to get attachments to the document. Response code: {response.code}")
                except Exception as e:
                    logging.error(f"get_attachmnets(): Error while adding attachment: {e}")

        def get_attachment_by_id(self):
            """Get attachment by Id for the PDF document and save it to local file."""
            if self.pdf_api:
                try:
                    response : AttachmentResponse = self.pdf_api.get_document_attachment_by_index(Config.PDF_DOCUMENT_NAME, Config.ATTACHMENT_PATH)
                    if response.code == 200:
                        attachment: Attachment = response.attachment
                        temp_file = self.pdf_api.get_download_document_attachment_by_index(Config.PDF_DOCUMENT_NAME, Config.ATTACHMENT_PATH)
                        local_path = Config.LOCAL_FOLDER / attachment.name
                        shutil.copy(temp_file, local_path)
                        logging.info(f"get_attachment_by_id(): attachment '{local_path}' for the document '{Config.PDF_DOCUMENT_NAME}' successfuly saved.")
                    else:
                        logging.error(f"get_attachment_by_id(): Failed to get attachment for the document '{Config.PDF_DOCUMENT_NAME}'. Response code: {response.code}")
                except Exception as e:
                    logging.error(f"get_attachment_by_id(): Error while get attachment: {e}")


    if __name__ == "__main__":
        pdf_attachments = PdfAttachments()
        pdf_attachments.upload_document()
        pdf_attachments.get_attachments()
        pdf_attachments.get_attachment_by_id()