Replace Links in PDF in Python SDK

    import shutil
    import json
    import logging
    from pathlib import Path
    from asposepdfcloud import ApiClient, PdfApi, LinkAnnotationsResponse, LinkAnnotationResponse

    class Config:
        """Configuration parameters."""
        CREDENTIALS_FILE = Path(r"..\\credentials.json")
        LOCAL_FOLDER = Path(r"C:\\Samples")
        PDF_DOCUMENT_NAME = "sample.pdf"
        LOCAL_RESULT_DOCUMENT_NAME = "output_sample.pdf"
        NEW_LINK_ACTION = "https://reference.aspose.cloud/pdf/"
        PAGE_NUMBER = 2
        LINK_FIND_ID = "GI5UO32UN5KVESKBMN2GS33OHMZTEMJMGUYDQLBTGYYCYNJSGE"

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

    class PdfLinks:
        """Class for managing PDF links 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("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"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"File {Config.PDF_DOCUMENT_NAME} uploaded successfully.")
                except Exception as e:
                    logging.error(f"Failed to upload file: {e}")

        def download_result(self):
            """Download the processed PDF document from the Aspose Cloud server."""
            if self.pdf_api:
                try:
                    temp_file = self.pdf_api.download_file(Config.PDF_DOCUMENT_NAME)
                    local_path = Config.LOCAL_FOLDER / Config.LOCAL_RESULT_DOCUMENT_NAME
                    shutil.move(temp_file, str(local_path))
                    logging.info(f"download_result(): File successfully downloaded: {local_path}")
                except Exception as e:
                    logging.error(f"download_result(): Failed to download file: {e}")

        def show_links_array(self, links, prefix):
            """Show all hyperlink annotations for a specific PDF document."""
            for item in links:
                logging.info(f"{prefix} Link ID: '{item.id}' - Link Action: '{item.action}'")

        def get_all_links(self):
            """Get all hyperlink annotations for a specific PDF document."""
            if self.pdf_api:
                try:
                    response = self.pdf_api.get_page_link_annotations( Config.PDF_DOCUMENT_NAME, Config.PAGE_NUMBER)
                    if response.code == 200:
                        self.show_links_array(response.links.list, "All: ")
                    else:
                        logging.error(f"Failed to add link to the page. Response code: {response.code}")
                except Exception as e:
                    logging.error(f"Error while adding link: No links found - {e}")

        def get_link_by_id(self) -> LinkAnnotationResponse:
            if self.pdf_api:
                result_link: LinkAnnotationResponse = self.pdf_api.get_link_annotation(Config.PDF_DOCUMENT_NAME, Config.LINK_FIND_ID)

                if result_link.code == 200:
                    return result_link

                print("Link not found.")
                return None

        def replace_link(self):
            if self.pdf_api:
                link_annotation: LinkAnnotationResponse = self.get_link_by_id()

                if not link_annotation:
                    return

                link_annotation.link.action = Config.NEW_LINK_ACTION

                response: LinkAnnotationsResponse = self.pdf_api.put_link_annotation(
                    Config.PDF_DOCUMENT_NAME,
                    Config.LINK_FIND_ID,
                    link_annotation.link,
                )

                if response.code == 200:
                    print("Link annotation replaced successfully.")
                else:
                    print("Failed to replace link annotation.")

    if __name__ == "__main__":
        pdf_links = PdfLinks()
        pdf_links.upload_document()
        pdf_links.get_all_links()
        pdf_links.replace_link()
        pdf_links.download_result()