获取 PDF 元数据

PDF 文档通常包含描述文档内容、作者信息和权限的有价值元数据。Aspose.PDF 提供了便捷的 API 来检索标准和自定义的元数据属性。此代码片段演示了如何使用 PdfFileInfo 类以编程方式检查 PDF 文件，包括 Python 中的逐步示例。

1. 加载 PDF 文件。
2. 检索标准元数据。
3. 检查 PDF 状态和安全性。
4. 检索自定义元数据。

import aspose.pdf as ap
import aspose.pdf.facades as pdf_facades
from io import FileIO

import sys
from os import path

sys.path.append(path.join(path.dirname(__file__), ".."))

from config import set_license, initialize_data_dir


def get_pdf_metadata(infile):

    # Get and display PDF information
    pdf_info = pdf_facades.PdfFileInfo(infile)
    print(f"Subject: {pdf_info.subject}")
    print(f"Title: {pdf_info.title}")
    print(f"Keywords: {pdf_info.keywords}")
    print(f"Creator: {pdf_info.creator}")
    print(f"Creation Date: {pdf_info.creation_date}")
    print(f"Modification Date: {pdf_info.mod_date}")

    # Check PDF status
    print(f"Is Valid PDF: {pdf_info.is_pdf_file}")
    print(f"Is Encrypted: {pdf_info.is_encrypted}")
    print(f"Has Open Password: {pdf_info.has_open_password}")
    print(f"Has Edit Password: {pdf_info.has_edit_password}")
    print(f"Is Portfolio: {pdf_info.has_collection}")

    # Retrieve and display a specific custom attribute
    reviewer = pdf_info.get_meta_info("Reviewer")
    print(f"Reviewer: {reviewer if reviewer else 'No Reviewer metadata found.'}")