Add Links to PDF in Python SDK

    import shutil
    import json
    import logging
    from pathlib import Path
    from asposepdfcloud import ApiClient, PdfApi, LinkAnnotation, LinkActionType, LinkHighlightingMode, Color, Link, Rectangle

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


    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_RECT = Rectangle(llx=244.914, lly=488.622, urx=284.776, ury=498.588)


    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("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 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 append_link(self):
            """Append a new hyperlink annotation to a specific page in the PDF document."""
            if self.pdf_api:
                link_annotation = LinkAnnotation(
                    links=[Link(href=Config.NEW_LINK_ACTION)],
                    action_type= LinkActionType.GOTOURIACTION,
                    action=Config.NEW_LINK_ACTION,
                    highlighting=LinkHighlightingMode.INVERT,
                    color=Color(a=255, r=0, g=255, b=0),
                    rect=Config.LINK_RECT,
                )

                try:
                    response = self.pdf_api.post_page_link_annotations(
                        Config.PDF_DOCUMENT_NAME, Config.PAGE_NUMBER, [link_annotation]
                    )
                    if response.code == 200:
                        logging.info(f"append_link(): Link '{Config.NEW_LINK_ACTION}' added to page #{Config.PAGE_NUMBER}.")
                    else:
                        logging.error(f"append_link(): Failed to add link to the page. Response code: {response.code}")
                except Exception as e:
                    logging.error(f"append_link(): Error while adding link: {e}")


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