Extract SDF Document From PDF

Requirements

These packages are required to use these features in production. Trial keys have unlimited access to all features

Web SDKFull API

Sample JavaScript code for editing an existing PDF document at the object level by using the Apryse SDK Cos/SDF low-level API.

Learn more about our Web SDK and PDF Editing & Manipulation Library.

Implementation steps

Step 1: Follow get started in your preferred web stack for WebViewer Step 2: Enable the full API by passing the fullAPI option into the WebViewer constructor Step 3: Add the sample code provided in this guide

This full sample is one of many included in the manual download of WebViewer.

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

(exports => {
  exports.runSDFTest = () => {
    const PDFNet = exports.Core.PDFNet;

    const main = async () => {
      console.log('Beginning SDF Test.');
      const inputURL = '../TestFiles/';

      try {
        // Here we create a SDF/Cos document directly from PDF file. In case you have
        // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
        const docorig = await PDFNet.PDFDoc.createFromURL(inputURL + 'fish.pdf');
        const doc = await docorig.getSDFDoc();
        doc.initSecurityHandler();
        doc.lock();
        console.log('Modifying into dictionary, adding custom properties, embedding a stream...');

        const trailer = await doc.getTrailer(); // Get the trailer

        // Now we will change PDF document information properties using SDF API

        // Get the Info dictionary.

        let itr = await trailer.find('Info');
        let info;
        if (await itr.hasNext()) {
          info = await itr.value();
          // Modify 'Producer' entry.
          info.putString('Producer', 'PDFTron PDFNet');

          // read title entry if it is present
          itr = await info.find('Author');
          if (await itr.hasNext()) {
            const itrval = await itr.value();
            const oldstr = await itrval.getAsPDFText();
            info.putText('Author', oldstr + ' - Modified');
          } else {
            info.putString('Author', 'Me, myself, and I');
          }
        } else {
          // Info dict is missing.
          info = await trailer.putDict('Info');
          info.putString('Producer', 'PDFTron PDFNet');
          info.putString('Title', 'My document');
        }

        // Create a custom inline dictionary within Infor dictionary
        const customDict = await info.putDict('My Direct Dict');
        customDict.putNumber('My Number', 100); // Add some key/value pairs
        customDict.putArray('My Array');

        // Create a custom indirect array within Info dictionary
        const customArray = await doc.createIndirectArray();
        info.put('My Indirect Array', customArray); // Add some entries

        // create indirect link to root
        const trailerRoot = await trailer.get('Root');
        customArray.pushBack(await trailerRoot.value());

        // Embed a custom stream (file mystream.txt).
        const embedFile = await PDFNet.Filter.createURLFilter(inputURL + 'my_stream.txt');
        const mystm = await PDFNet.FilterReader.create(embedFile);
        const indStream = await doc.createIndirectStreamFromFilter(mystm);
        customArray.pushBack(indStream);

        const docbuf = await doc.saveMemory(0, '%PDF-1.4'); // PDFNet.SDFDoc.SaveOptions.e_remove_unused
        saveBufferAsPDFDoc(docbuf, 'sdftest_out.pdf');
        console.log('Done.');
      } catch (err) {
        console.log(err);
      }
    };
    // add your own license key as the second parameter, e.g. PDFNet.runWithCleanup(main, 'YOUR_LICENSE_KEY')
    PDFNet.runWithCleanup(main);
  };
})(window);
// eslint-disable-next-line spaced-comment
//# sourceURL=SDFTest.js