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Aspose.PDF  for Python

在 Python SDK 中替换 PDF 中的链接

使用 Cloud Python SDK 替换 PDF 文档中的链接。

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如何通过 Cloud Python SDK 替换 PDF 中的链接

要替换 PDF 中的链接,我们将使用 Aspose.PDF Cloud Python SDK。该 Cloud SDK 帮助 Python 程序员使用 Python 编程语言通过 Aspose.PDF REST API 开发基于云的 PDF 创建、注释、编辑和转换应用程序。只需在 Aspose for Cloud 创建一个账户并获取您的应用信息。一旦您拥有 App SID 和密钥,您就可以开始使用 Aspose.PDF Cloud Python SDK。如果 python 包托管在 Github 上,您可以直接从 Github 安装:

从 Github 安装


     
    pip install git+https://github.com/aspose-pdf-cloud/aspose-pdf-cloud-python.git

包管理器控制台命令

     
    pip install asposepdfcloud

通过 Python 替换 PDF 中链接的步骤

Aspose.PDF Cloud 开发人员只需几行代码即可轻松加载和替换 PDF 中的链接。

  1. 安装 Python SDK
  2. 上传 PDF 文档到 Aspose 云服务器
  3. 从 Aspose 云服务器下载处理后的 PDF 文档
  4. 显示特定 PDF 文档的所有超链接注释
  5. 获取特定 PDF 文档的所有超链接注释
  6. 替换链接注释
 

使用 Python 替换 PDF 中的链接


    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"C:\\Projects\\ASPOSE\\Pdf.Cloud\\Credentials\\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()
 

处理 PDF 中的链接

通过定期审查和更新 PDF 文档中的超链接,您可以保持其相关性、准确性和安全性,从而为读者提供更好的体验。 使用 Aspose.PDF Cloud Python SDK 替换 PDF 文档中的链接。

使用我们的 Python 库,您可以:

  • 合并 PDF 文档。
  • 拆分 PDF 文件。
  • 将 PDF 转换为其他格式,反之亦然。
  • 操作注释。
  • 在 PDF 中处理图像等。
  • 您可以尝试我们的 免费应用 在线测试功能。