Sample code for editing an existing PDF document at the object level by using the Apryse SDK Cos/SDF low-level API. Sample code provided in Python, C++, C#, Java, Node.js (JavaScript), PHP, Ruby and VB.
Learn more about our Server SDK and PDF Editing & Manipulation Library.
1//
2// Copyright (c) 2001-2024 by Apryse Software Inc. All Rights Reserved.
3//
4
5using System;
6using pdftron;
7using pdftron.Common;
8using pdftron.Filters;
9using pdftron.SDF;
10using pdftron.PDF;
11
12namespace SDFTestCS
13{
14 /// <summary>
15 /// This sample illustrates how to use basic SDF API (also known as Cos) to edit an
16 /// existing document.
17 /// </summary>
18 class Class1
19 {
20 private static pdftron.PDFNetLoader pdfNetLoader = pdftron.PDFNetLoader.Instance();
21 static Class1() {}
22
23 static void Main(string[] args)
24 {
25 PDFNet.Initialize(PDFTronLicense.Key);
26
27 // Relative path to the folder containing test files.
28 string input_path = "../../../../TestFiles/";
29 string output_path = "../../../../TestFiles/Output/";
30
31
32 //------------------------------------------------------------------
33 Console.WriteLine("Opening the test file...");
34
35 try
36 {
37 // Here we create a SDF/Cos document directly from PDF file. In case you have
38 // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
39 using (SDFDoc doc = new SDFDoc(input_path + "fish.pdf"))
40 {
41 doc.InitSecurityHandler();
42
43 Console.WriteLine("Modifying info dictionary, adding custom properties, embedding a stream...");
44
45 Obj trailer = doc.GetTrailer(); // Get the trailer
46
47 // Now we will change PDF document information properties using SDF API
48
49 // Get the Info dictionary.
50 DictIterator itr = trailer.Find("Info");
51 Obj info;
52 if (itr.HasNext())
53 {
54 info = itr.Value();
55 // Modify 'Producer' entry.
56 info.PutString("Producer", "PDFTron PDFNet");
57
58 // Read title entry (if it is present)
59 itr = info.Find("Author");
60 if (itr.HasNext())
61 {
62 info.PutString("Author", itr.Value().GetAsPDFText() + "- Modified");
63 }
64 else
65 {
66 info.PutString("Author", "Joe Doe");
67 }
68 }
69 else
70 {
71 // Info dict is missing.
72 info = trailer.PutDict("Info");
73 info.PutString("Producer", "PDFTron PDFNet");
74 info.PutString("Title", "My document");
75 }
76
77 // Create a custom inline dictionary within Info dictionary
78 Obj custom_dict = info.PutDict("My Direct Dict");
79
80 // Add some key/value pairs
81 custom_dict.PutNumber("My Number", 100);
82
83 Obj my_array = custom_dict.PutArray("My Array");
84
85 // Create a custom indirect array within Info dictionary
86 Obj custom_array = doc.CreateIndirectArray();
87 info.Put("My Indirect Array", custom_array);
88
89 // Create indirect link to root
90 custom_array.PushBack(trailer.Get("Root").Value());
91
92 // Embed a custom stream (file my_stream.txt).
93 MappedFile embed_file = new MappedFile(input_path + "my_stream.txt");
94 FilterReader mystm = new FilterReader(embed_file);
95 custom_array.PushBack(doc.CreateIndirectStream(mystm));
96
97 // Save the changes.
98 Console.WriteLine("Saving modified test file...");
99 doc.Save(output_path + "sdftest_out.pdf", 0, "%PDF-1.4");
100 }
101
102 Console.WriteLine("Test completed.");
103 }
104 catch (PDFNetException e)
105 {
106 Console.WriteLine(e.Message);
107 }
108 PDFNet.Terminate();
109 }
110 }
111}
1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2024 by Apryse Software Inc. All Rights Reserved.
3// Consult legal.txt regarding legal and license information.
4//---------------------------------------------------------------------------------------
5
6#include <PDF/PDFNet.h>
7#include <SDF/SDFDoc.h>
8#include <Filters/MappedFile.h>
9#include <Filters/FilterReader.h>
10#include <iostream>
11#include "../../LicenseKey/CPP/LicenseKey.h"
12
13using namespace std;
14
15using namespace pdftron;
16using namespace SDF;
17using namespace Filters;
18
19// This sample illustrates how to use basic SDF API (also known as Cos) to edit an
20// existing document.
21
22int main(int argc, char *argv[])
23{
24 int ret = 0;
25 PDFNet::Initialize(LicenseKey);
26
27 // Relative path to the folder containing test files.
28 string input_path = "../../TestFiles/";
29 string output_path = "../../TestFiles/Output/";
30
31 try
32 {
33 cout << "Opening the test file..." << endl;
34
35 // Here we create a SDF/Cos document directly from PDF file. In case you have
36 // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
37 SDFDoc doc((input_path + "fish.pdf").c_str());
38 doc.InitSecurityHandler();
39
40 cout << "Modifying info dictionary, adding custom properties, embedding a stream..." << endl;
41 Obj trailer = doc.GetTrailer(); // Get the trailer
42
43 // Now we will change PDF document information properties using SDF API
44
45 // Get the Info dictionary.
46 DictIterator itr = trailer.Find("Info");
47 Obj info;
48 if (itr.HasNext())
49 {
50 info = itr.Value();
51 // Modify 'Producer' entry.
52 info.PutString("Producer", "PDFTron PDFNet");
53
54 // Read title entry (if it is present)
55 itr = info.Find("Author");
56 if (itr.HasNext())
57 {
58 UString oldstr;
59 itr.Value().GetAsPDFText(oldstr);
60 info.PutText("Author",oldstr+"- Modified");
61 }
62 else
63 {
64 info.PutString("Author", "Me, myself, and I");
65 }
66 }
67 else
68 {
69 // Info dict is missing.
70 info = trailer.PutDict("Info");
71 info.PutString("Producer", "PDFTron PDFNet");
72 info.PutString("Title", "My document");
73 }
74
75 // Create a custom inline dictionary within Info dictionary
76 Obj custom_dict = info.PutDict("My Direct Dict");
77 custom_dict.PutNumber("My Number", 100); // Add some key/value pairs
78 custom_dict.PutArray("My Array");
79
80 // Create a custom indirect array within Info dictionary
81 Obj custom_array = doc.CreateIndirectArray();
82 info.Put("My Indirect Array", custom_array); // Add some entries
83
84 // Create indirect link to root
85 custom_array.PushBack(trailer.Get("Root").Value());
86
87 // Embed a custom stream (file mystream.txt).
88 MappedFile embed_file((input_path + "my_stream.txt"));
89 FilterReader mystm(embed_file);
90 custom_array.PushBack( doc.CreateIndirectStream(mystm) );
91
92 // Save the changes.
93 cout << "Saving modified test file..." << endl;
94 doc.Save((output_path + "sdftest_out.pdf").c_str(), 0, 0, "%PDF-1.4");
95
96 cout << "Test completed." << endl;
97 }
98 catch(Common::Exception& e)
99 {
100 cout << e << endl;
101 ret = 1;
102 }
103 catch(...)
104 {
105 cout << "Unknown Exception" << endl;
106 ret = 1;
107 }
108
109 PDFNet::Terminate();
110 return ret;
111}
1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2021 by PDFTron Systems Inc. All Rights Reserved.
3// Consult LICENSE.txt regarding license information.
4//---------------------------------------------------------------------------------------
5
6package main
7import (
8 "fmt"
9 . "pdftron"
10)
11
12import "pdftron/Samples/LicenseKey/GO"
13
14// This sample illustrates how to use basic SDF API (also known as Cos) to edit an
15// existing document.
16
17func main(){
18 PDFNetInitialize(PDFTronLicense.Key)
19
20 // Relative path to the folder containing the test files.
21 inputPath := "../../TestFiles/"
22 outputPath := "../../TestFiles/Output/"
23
24 fmt.Println("Opening the test file...")
25
26 // Here we create a SDF/Cos document directly from PDF file. In case you have
27 // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
28 doc := NewSDFDoc(inputPath + "fish.pdf")
29 doc.InitSecurityHandler()
30
31 fmt.Println("Modifying info dictionary, adding custom properties, embedding a stream...")
32 trailer := doc.GetTrailer() // Get the trailer
33
34 // Now we will change PDF document information properties using SDF API
35
36 // Get the Info dictionary
37 itr := trailer.Find("Info")
38 info := NewObj()
39 if itr.HasNext(){
40 info = itr.Value()
41 // Modify 'Producer' entry
42 info.PutString("Producer", "PDFTron PDFNet")
43
44 // Read title entry (if it is present)
45 itr = info.Find("Author")
46 if itr.HasNext(){
47 fmt.Println("Author inside")
48 oldstr := itr.Value().GetAsPDFText()
49 info.PutText("Author", oldstr + "- Modified")
50 }else{
51 info.PutString("Author", "Me, myself, and I")
52 }
53 }else{
54 // Info dict is missing.
55 info = trailer.PutDict("Info")
56 info.PutString("Producer", "PDFTron PDFNet")
57 info.PutString("Title", "My document")
58 }
59 // Create a custom inline dictionary within Info dictionary
60 customDict := info.PutDict("My Direct Dict")
61 customDict.PutNumber("My Number", 100) // Add some key/value pairs
62 customDict.PutArray("My Array")
63
64 // Create a custom indirect array within Info dictionary
65 customArray := doc.CreateIndirectArray()
66 info.Put("My Indirect Array", customArray) // Add some entries
67
68 // Create indirect link to root
69 customArray.PushBack(trailer.Get("Root").Value())
70
71 // Embed a custom stream (file mystream.txt).
72 embedFile := NewMappedFile(inputPath + "my_stream.txt")
73 mystm := NewFilterReader(embedFile)
74 customArray.PushBack( doc.CreateIndirectStream(mystm) )
75
76 // Save the changes.
77 fmt.Println("Saving modified test file...")
78 doc.Save(outputPath + "sdftest_out.pdf", uint(0), "%PDF-1.4")
79 doc.Close()
80
81 PDFNetTerminate()
82 fmt.Println("Test Completed")
83
84}
1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2024 by Apryse Software Inc. All Rights Reserved.
3// Consult legal.txt regarding legal and license information.
4//---------------------------------------------------------------------------------------
5
6import com.pdftron.pdf.*;
7import com.pdftron.sdf.*;
8import com.pdftron.filters.*;
9
10// This sample illustrates how to use basic SDF API (also known as Cos) to edit an
11// existing document.
12public class SDFTest {
13 public static void main(String[] args) {
14 PDFNet.initialize(PDFTronLicense.Key());
15
16 // Relative path to the folder containing test files.
17 String input_path = "../../TestFiles/";
18 String output_path = "../../TestFiles/Output/";
19
20 try {
21 System.out.println("Opening the test file...");
22
23 // Here we create a SDF/Cos document directly from PDF file. In case you have
24 // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
25 SDFDoc doc = new SDFDoc((input_path + "fish.pdf"));
26 doc.initSecurityHandler();
27
28 System.out.println("Modifying info dictionary, adding custom properties, embedding a stream...");
29 Obj trailer = doc.getTrailer(); // Get the trailer
30
31 // Now we will change PDF document information properties using SDF API
32
33 // Get the Info dictionary.
34 DictIterator itr = trailer.find("Info");
35 Obj info;
36 if (itr.hasNext()) {
37 info = itr.value();
38 // Modify 'Producer' entry.
39 info.putString("Producer", "PDFTron PDFNet");
40
41 // Read title entry (if it is present)
42 itr = info.find("Author");
43 if (itr.hasNext()) {
44 String oldstr = itr.value().getAsPDFText();
45
46 info.putText("Author", oldstr + "- Modified");
47 } else {
48 info.putString("Author", "Me, myself, and I");
49 }
50 } else {
51 // Info dict is missing.
52 info = trailer.putDict("Info");
53 info.putString("Producer", "PDFTron PDFNet");
54 info.putString("Title", "My document");
55 }
56
57 // Create a custom inline dictionary within Info dictionary
58 Obj custom_dict = info.putDict("My Direct Dict");
59 custom_dict.putNumber("My Number", 100); // Add some key/value pairs
60 custom_dict.putArray("My Array");
61
62 // Create a custom indirect array within Info dictionary
63 Obj custom_array = doc.createIndirectArray();
64 info.put("My Indirect Array", custom_array); // Add some entries
65
66 // Create indirect link to root
67 custom_array.pushBack(trailer.get("Root").value());
68
69 // Embed a custom stream (file mystream.txt).
70 MappedFile embed_file = new MappedFile(input_path + "my_stream.txt");
71 FilterReader mystm = new FilterReader(embed_file);
72 custom_array.pushBack(doc.createIndirectStream(mystm));
73
74 // Save the changes.
75 System.out.println("Saving modified test file...");
76 doc.save(output_path + "sdftest_out.pdf", SDFDoc.SaveMode.NO_FLAGS, null, "%PDF-1.4");
77 // output PDF doc
78 doc.close();
79
80 System.out.println("Test completed.");
81 } catch (Exception e) {
82 System.out.println(e);
83 }
84
85 PDFNet.terminate();
86 }
87}
1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2024 by Apryse Software Inc. All Rights Reserved.
3// Consult legal.txt regarding legal and license information.
4//---------------------------------------------------------------------------------------
5
6// This sample illustrates how to use basic SDF API (also known as Cos) to edit an
7// existing document.
8
9const { PDFNet } = require('@pdftron/pdfnet-node');
10const PDFTronLicense = require('../LicenseKey/LicenseKey');
11
12((exports) => {
13
14 exports.runSDFTest = () => {
15
16 const main = async() => {
17 // Relative path to the folder containing test files.
18 const inputPath = '../TestFiles/';
19
20 try {
21 console.log('Opening the test file...');
22 // Here we create a SDF/Cos document directly from PDF file. In case you have
23 // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
24 const doc = await PDFNet.SDFDoc.createFromFileUString(inputPath + 'fish.pdf');
25 doc.initSecurityHandler();
26 console.log('Modifying into dictionary, adding custom properties, embedding a stream...');
27
28 const trailer = await doc.getTrailer(); // Get the trailer
29
30 // Now we will change PDF document information properties using SDF API
31
32 // Get the Info dictionary.
33
34 let itr = await trailer.find('Info');
35 let info;
36 if (await itr.hasNext()) {
37 info = await itr.value();
38 // Modify 'Producer' entry.
39 info.putString('Producer', 'PDFTron PDFNet');
40
41 // read title entry if it is present
42 itr = await info.find('Author');
43 if (await itr.hasNext()) {
44 const itrval = await itr.value();
45 const oldstr = await itrval.getAsPDFText();
46 info.putText('Author', oldstr + ' - Modified');
47 } else {
48 info.putString('Author', 'Me, myself, and I');
49 }
50 } else {
51 // Info dict is missing.
52 info = await trailer.putDict('Info');
53 info.putString('Producer', 'PDFTron PDFNet');
54 info.putString('Title', 'My document');
55 }
56
57 // Create a custom inline dictionary within Infor dictionary
58 const customDict = await info.putDict('My Direct Dict');
59 customDict.putNumber('My Number', 100); // Add some key/value pairs
60 customDict.putArray('My Array');
61
62 // Create a custom indirect array within Info dictionary
63 const customArray = await doc.createIndirectArray();
64 info.put('My Indirect Array', customArray); // Add some entries
65
66 // create indirect link to root
67 const trailerRoot = await trailer.get('Root');
68 customArray.pushBack((await trailerRoot.value()));
69
70 // Embed a custom stream (file mystream.txt).
71 const embedFile = await PDFNet.Filter.createMappedFileFromUString(inputPath + 'my_stream.txt');
72 const mystm = await PDFNet.FilterReader.create(embedFile);
73 const indStream = await doc.createIndirectStreamFromFilter(mystm);
74 customArray.pushBack(indStream);
75
76 console.log('Saving modified test file...');
77 await doc.save(inputPath + 'Output/sdftest_out.pdf', 0, '%PDF-1.4');
78 console.log('Test completed.');
79 } catch (err) {
80 console.log(err);
81 }
82 };
83 PDFNet.runWithCleanup(main, PDFTronLicense.Key).catch(function(error){console.log('Error: ' + JSON.stringify(error));}).then(function(){return PDFNet.shutdown();});
84 };
85 exports.runSDFTest();
86})(exports);
87// eslint-disable-next-line spaced-comment
88//# sourceURL=SDFTest.js
1<?php
2//---------------------------------------------------------------------------------------
3// Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
4// Consult LICENSE.txt regarding license information.
5//---------------------------------------------------------------------------------------
6if(file_exists("../../../PDFNetC/Lib/PDFNetPHP.php"))
7include("../../../PDFNetC/Lib/PDFNetPHP.php");
8include("../../LicenseKey/PHP/LicenseKey.php");
9
10// Relative path to the folder containing the test files.
11$input_path = getcwd()."/../../TestFiles/";
12$output_path = $input_path."Output/";
13
14// This sample illustrates how to use basic SDF API (also known as Cos) to edit an
15// existing document.
16
17 PDFNet::Initialize($LicenseKey);
18 PDFNet::GetSystemFontList(); // Wait for fonts to be loaded if they haven't already. This is done because PHP can run into errors when shutting down if font loading is still in progress.
19
20 echo nl2br("Opening the test file...\n");
21
22 // Here we create a SDF/Cos document directly from PDF file. In case you have
23 // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
24 $doc = new SDFDoc($input_path."fish.pdf");
25 $doc->InitSecurityHandler();
26
27 echo nl2br("Modifying info dictionary, adding custom properties, embedding a stream...\n");
28 $trailer = $doc->GetTrailer(); // Get the trailer
29
30 // Now we will change PDF document information properties using SDF API
31
32 // Get the Info dictionary.
33 $itr = $trailer->Find("Info");
34 if ($itr->HasNext())
35 {
36 $info = $itr->Value();
37 // Modify 'Producer' entry.
38 $info->PutString("Producer", "PDFTron PDFNet");
39
40 // Read title entry (if it is present)
41 $itr = $info->Find("Author");
42 if ($itr->HasNext())
43 {
44 // Modify 'Producer' entry
45 $itr->Value()->PutString("Producer", "PDFTron PDFNet");
46
47 // Read title entry (if it is present)
48 $itr = $info->Find("Author");
49 if ($itr->HasNext()) {
50 $oldstr = $itr->Value()->GetAsPDFTest();
51 $info->PutText("Author",$oldstr."- Modified");
52 }
53 else {
54 $info->PutString("Author", "Me, myself, and I");
55 }
56 }
57 else
58 {
59 $info->PutString("Author", "Me, myself, and I");
60 }
61 }
62 else
63 {
64 // Info dict is missing.
65 $info = $trailer->PutDict("Info");
66 $info->PutString("Producer", "PDFTron PDFNet");
67 $info->PutString("Title", "My document");
68 }
69
70 // Create a custom inline dictionary within Info dictionary
71 $custom_dict = $info->PutDict("My Direct Dict");
72 $custom_dict->PutNumber("My Number", 100); // Add some key/value pairs
73 $custom_dict->PutArray("My Array");
74
75 // Create a custom indirect array within Info dictionary
76 $custom_array = $doc->CreateIndirectArray();
77 $info->Put("My Indirect Array", $custom_array); // Add some entries
78
79 // Create indirect link to root
80 $custom_array->PushBack($trailer->Get("Root")->Value());
81
82 // Embed a custom stream (file mystream.txt).
83 $embed_file = new MappedFile($input_path."my_stream.txt");
84 $mystm = new FilterReader($embed_file);
85 $custom_array->PushBack( $doc->CreateIndirectStream($mystm) );
86
87 // Save the changes.
88 echo nl2br("Saving modified test file...\n");
89 $doc->Save($output_path."sdftest_out.pdf", 0, "%PDF-1.4");
90 $doc->Close();
91 PDFNet::Terminate();
92 echo nl2br("Test completed.\n");
93
94
95?>
1#---------------------------------------------------------------------------------------
2# Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
3# Consult LICENSE.txt regarding license information.
4#---------------------------------------------------------------------------------------
5
6require '../../../PDFNetC/Lib/PDFNetRuby'
7include PDFNetRuby
8require '../../LicenseKey/RUBY/LicenseKey'
9
10$stdout.sync = true
11
12# This sample illustrates how to use basic SDF API (also known as Cos) to edit an
13# existing document.
14
15 PDFNet.Initialize(PDFTronLicense.Key)
16
17 # Relative path to the folder containing the test files.
18 input_path = "../../TestFiles/"
19 output_path = "../../TestFiles/Output/"
20
21 puts "Opening the test file..."
22
23 # Here we create a SDF/Cos document directly from PDF file. In case you have
24 # PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc method.
25 doc = SDFDoc.new(input_path + "fish.pdf")
26 doc.InitSecurityHandler
27
28 puts "Modifying info dictionary, adding custom properties, embedding a stream..."
29 trailer = doc.GetTrailer # Get the trailer
30
31 # Now we will change PDF document information properties using SDF API
32
33 # Get the Info dictionary
34 itr = trailer.Find("Info")
35 info = Obj.new
36 if itr.HasNext
37 info = itr.Value
38 # Modify 'Producer' entry
39 info.PutString("Producer", "PDFTron PDFNet")
40
41 # Read title entry (if it is present)
42 itr = info.Find("Author")
43 if itr.HasNext
44 oldstr = itr.Value.GetAsPDFTest
45 info.PutText("Author", oldstr + "- Modified")
46 else
47 info.PutString("Author", "Me, myself, and I")
48 end
49 else
50 # Info dict is missing.
51 info = trailer.PutDict("Info")
52 info.PutString("Producer", "PDFTron PDFNet")
53 info.PutString("Title", "My document")
54 end
55
56 # Create a custom inline dictionary within Info dictionary
57 custom_dict = info.PutDict("My Direct Dict")
58 custom_dict.PutNumber("My Number", 100) # Add some key/value pairs
59 custom_dict.PutArray("My Array")
60
61 # Create a custom indirect array within Info dictionary
62 custom_array = doc.CreateIndirectArray
63 info.Put("My Indirect Array", custom_array) # Add some entries
64
65 # Create indirect link to root
66 custom_array.PushBack(trailer.Get("Root").Value)
67
68 # Embed a custom stream (file mystream.txt).
69 embed_file = MappedFile.new(input_path + "my_stream.txt")
70 mystm = FilterReader.new(embed_file)
71 custom_array.PushBack( doc.CreateIndirectStream(mystm) )
72
73 # Save the changes.
74 puts "Saving modified test file..."
75 doc.Save(output_path + "sdftest_out.pdf", 0, "%PDF-1.4")
76 doc.Close
77 PDFNet.Terminate
78 puts "Test Completed"
1#---------------------------------------------------------------------------------------
2# Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
3# Consult LICENSE.txt regarding license information.
4#---------------------------------------------------------------------------------------
5
6import site
7site.addsitedir("../../../PDFNetC/Lib")
8import sys
9from PDFNetPython import *
10
11sys.path.append("../../LicenseKey/PYTHON")
12from LicenseKey import *
13
14
15# This sample illustrates how to use basic SDF API (also known as Cos) to edit an
16# existing document.
17
18def main():
19 PDFNet.Initialize(LicenseKey)
20
21 # Relative path to the folder containing the test files.
22 input_path = "../../TestFiles/"
23 output_path = "../../TestFiles/Output/"
24
25 print("Opening the test file...")
26
27 # Here we create a SDF/Cos document directly from PDF file. In case you have
28 # PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
29 doc = SDFDoc(input_path + "fish.pdf")
30 doc.InitSecurityHandler()
31
32 print("Modifying info dictionary, adding custom properties, embedding a stream...")
33 trailer = doc.GetTrailer() # Get the trailer
34
35 # Now we will change PDF document information properties using SDF API
36
37 # Get the Info dictionary
38 itr = trailer.Find("Info")
39 info = Obj()
40 if itr.HasNext():
41 info = itr.Value()
42 # Modify 'Producer' entry
43 info.PutString("Producer", "PDFTron PDFNet")
44
45 # Read title entry (if it is present)
46 itr = info.Find("Author")
47 if itr.HasNext():
48 oldstr = itr.Value().GetAsPDFTest()
49 info.PutText("Author", oldstr + "- Modified")
50 else:
51 info.PutString("Author", "Me, myself, and I")
52 else:
53 # Info dict is missing.
54 info = trailer.PutDict("Info")
55 info.PutString("Producer", "PDFTron PDFNet")
56 info.PutString("Title", "My document")
57
58 # Create a custom inline dictionary within Info dictionary
59 custom_dict = info.PutDict("My Direct Dict")
60 custom_dict.PutNumber("My Number", 100) # Add some key/value pairs
61 custom_dict.PutArray("My Array")
62
63 # Create a custom indirect array within Info dictionary
64 custom_array = doc.CreateIndirectArray()
65 info.Put("My Indirect Array", custom_array) # Add some entries
66
67 # Create indirect link to root
68 custom_array.PushBack(trailer.Get("Root").Value())
69
70 # Embed a custom stream (file mystream.txt).
71 embed_file = MappedFile(input_path + "my_stream.txt")
72 mystm = FilterReader(embed_file)
73 custom_array.PushBack( doc.CreateIndirectStream(mystm) )
74
75 # Save the changes.
76 print("Saving modified test file...")
77 doc.Save(output_path + "sdftest_out.pdf", 0, "%PDF-1.4")
78 doc.Close()
79
80 PDFNet.Terminate()
81 print("Test Completed")
82
83if __name__ == '__main__':
84 main()
1'
2' Copyright (c) 2001-2024 by Apryse Software Inc. All Rights Reserved.
3'
4
5Imports System
6
7Imports pdftron
8Imports pdftron.Common
9Imports pdftron.Filters
10Imports pdftron.SDF
11Imports pdftron.PDF
12
13Module SDFTestVB
14 Dim pdfNetLoader As PDFNetLoader
15 Sub New()
16 pdfNetLoader = pdftron.PDFNetLoader.Instance()
17 End Sub
18
19 ' This sample illustrates how to use basic SDF API (also known as Cos) to edit an
20 ' existing document.
21 Sub Main()
22
23 PDFNet.Initialize(PDFTronLicense.Key)
24
25 ' Relative path to the folder containing test files.
26 Dim input_path As String = "../../../../TestFiles/"
27 Dim output_path As String = "../../../../TestFiles/Output/"
28
29 Try
30 '------------------------------------------------------------------
31 Console.WriteLine("-------------------------------------------------")
32 Console.WriteLine("Opening the test file...")
33
34 ' Here we create a SDF/Cos document directly from PDF file. In case you have
35 ' PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
36 Using doc As SDFDoc = New SDFDoc(input_path + "fish.pdf")
37 doc.InitSecurityHandler()
38
39 Console.WriteLine("-------------------------------------------------")
40 Console.WriteLine("Modifying info dictionary, adding custom properties, embedding a stream...")
41
42 Dim trailer As Obj = doc.GetTrailer() ' Get the trailer
43
44 ' Now we will change PDF document information properties using SDF API
45
46 ' Get the Info dictionary.
47 Dim itr As DictIterator = trailer.Find("Info")
48 Dim info As Obj
49 If itr.HasNext() Then
50 info = itr.Value()
51 ' Modify 'Producer' entry.
52 info.PutString("Producer", "PDFTron PDFNet")
53
54 ' Read title entry (if it is present)
55 itr = info.Find("Author")
56 If Not itr.HasNext() Then
57 info.PutString("Author", "Joe Doe")
58 Else
59 info.PutString("Author", itr.Value().GetAsPDFText() + "- Modified")
60 End If
61 Else
62 ' Info dict is missing.
63 info = trailer.PutDict("Info")
64 info.PutString("Producer", "PDFTron PDFNet")
65 info.PutString("Title", "My document")
66 End If
67
68
69 ' Create a custom inline dictionary within Info dictionary
70 Dim custom_dict As Obj = info.PutDict("My Direct Dict")
71
72 ' Add some key/value pairs
73 custom_dict.PutNumber("My Number", 100)
74 Dim my_array As Obj = custom_dict.PutArray("My Array")
75
76 ' Create a custom indirect array within Info dictionary
77 Dim custom_array As Obj = doc.CreateIndirectArray()
78 info.Put("My Indirect Array", custom_array)
79
80 ' Create indirect link to root
81 custom_array.PushBack(trailer.Get("Root").Value())
82
83 ' Embed a custom stream (file my_stream.txt).
84 Dim embed_file As MappedFile = New MappedFile(input_path + "my_stream.txt")
85 Dim mystm As FilterReader = New FilterReader(embed_file)
86 custom_array.PushBack(doc.CreateIndirectStream(mystm))
87
88 ' Save the changes.
89 Console.WriteLine("Saving modified test file...")
90 doc.Save(output_path + "sdftest_out.pdf", 0, "%PDF-1.4")
91
92 Console.WriteLine("Done. Result saved in sdftest_out.pdf")
93 End Using
94 Catch ex As PDFNetException
95 Console.WriteLine(ex.Message)
96 Catch ex As Exception
97 MsgBox(ex.Message)
98 End Try
99 PDFNet.Terminate()
100 End Sub
101End Module
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