使用iTextSharp从pdf中读取javascript [英] Read javascript from pdf using iTextSharp

问题描述

我有一个脚本，在加载pdf文件后运行，并填充pdf中的一些表单字段。我假设它是在场景后面运行的某种javascript。在javascript代码中存储了一些我需要检索的值。我使用iTextSharp来处理pdf文件。是否可以读取javascript代码或值，以便我可以在我的c＃代码中以某种方式使用它们？

I have a script that runs after the pdf-file has been loaded and that populates some form fields in the pdf. I assume it is some kind of javascript running behind the scene. In the javascript code some values are stored that I need to retrieve. I use iTextSharp to work with the pdf-file. Is it possible to read the javascript code or the values so I can work with them in my c# code somehow?

推荐答案

这个问题回答：

var pdfReader = new PdfReader(infilename);
using (MemoryStream memoryStream = new MemoryStream())
{
    PdfStamper stamper = new PdfStamper(pdfReader, memoryStream);
    for (int i = 0; i <= pdfReader.XrefSize; i++)
    {
        PdfDictionary pd = pdfReader.GetPdfObject(i) as PdfDictionary;
        if (pd != null)
        {
            PdfObject poAA = pd.Get(PdfName.AA); //Gets automatic execution objects
            PdfObject poJS = pd.Get(PdfName.JS); // Gets javascript objects
            PdfObject poJavaScript = pd.Get(PdfName.JAVASCRIPT); // Gets other javascript objects
            //use poJS.GetBytes(), poJS.ToString() etc to inspect details...
        }
    }
    stamper.Close();
    pdfReader.Close();
    File.WriteAllBytes(rawfile, memoryStream.ToArray());
}

这是PdfObject的参考页面班级。

Here's a reference page for the PdfObject class.

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