I need to detect locked fields which placed on pdf form. I'm using itext 7.1.8 and I couldn't find any mentions or info about locked fields.
I have the following input data: 1) Pdf document URL. I need to read this PDF and check if is form exist and after that detects locked fields existence.
I have the code looks like the following:
public boolean hasLockedFields(final String pdf) {
PdfReader pdfReader = new PdfReader(new FileInputStream(path));
PdfWriter pdfWriter = new PdfWriter(new FileOutputStream(pathToSave));
PdfDocument doc = new PdfDocument(pdfReader, pdfWriter);
// and there I need to check locked fields in pdf.
}
How can I do it?
Related
I am looking for a way to check if a PDF file stored on a shared netwerk is open by another process by user X.
My searches were not satisfying and I am now trying to use the iText7 PDFwriter to check if the PDF is in use. And this works but when the PDF is NOT in use my theory fails.
If the PDF is not in use the closing the writer corrupts my PDF.
My code:
Public Function IsOpen(ByVal oPath As String) As Boolean
Try
Dim oWriter As New PdfWriter(oPath)
oWriter.Close()
Return False
Catch ex As Exception
Return True
End Try
End Function
So my question is. Can I close the PDFwriter without doing anything to the PDF. Cancel the write?
One can write the same content to the file rather than cancel the writing.
Firstly let's write the pdf to memory:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourcePath), new PdfWriter(baos));
pdfDocument.close();
Then let's rewrite the file with the bytes stored in memory:
PdfDocument pdfDoc = new PdfDocument(new PdfReader(new RandomAccessSourceFactory().createSource(baos.toByteArray()), new ReaderProperties()),
new PdfWriter(sourcePath), new StampingProperties().useAppendMode());
pdfDoc.close();
The side effect: during rewriting the pdf may be optimised by iText a bit.
I've tried to extract all the fields out of a dynamic form. But I've observed that the code worked for some forms while not for others. Worst, the code worked differently for the same form but two different downloaded files. But after digging a lot, I found that those forms which correctly, were freshly processed. Not even a single details were filled from a PDF Software(Adobe Reader). Also, if the form was filled and saved the thumbnail of the form in the explorer would change from. The code snippet is as follows:
PdfDocument pdfDoc;
pdfDoc = new PdfDocument(new PdfReader(src), new PdfWriter(dest));
PdfDictionary perms = pdfDoc.getCatalog().getPdfObject().getAsDictionary(PdfName.Perms);
if (perms != null) {
perms.remove(new PdfName("UR"));
perms.remove(PdfName.UR3);
if (perms.size() == 0) {
pdfDoc.getCatalog().remove(PdfName.Perms);
}
}
PdfAcroForm form = PdfAcroForm.getAcroForm(pdfDoc, true);
List<String> result = new ArrayList<String>(form.getFormFields().keySet());
Map<String, PdfFormField> fields = form.getFormFields();
Below is the image for the same form, but downloaded twice. The one with the colorful thumbnail is not filled. Other is filled using Adobe Reader and saved, and on saving the thumbnail vanished.
I suspect a flag might get set on saving the form. Any help is appreciated.Another peculiar observation, there was a mismatch in the number of parameters in the PdfCatalog object for the above two forms. An entry for the property 'NeedsRendering' was present in the faulty PDF and otherwise for the working PDf. I've attached screenshots for the working PDF during a debugging session.
hrsa_working_form:
Update 1
#Browno, apologies for the confusing question from a newbie's mind. I've posted the screenshots from the itext RUPS for the key '/AcroForm'. On exploring the answers for XFAForm, I've learned how to fill them. But flattening them causes an exception. I've used the pdfxfa jar under the license of AGPL. I'm lacking the knowledge of XFAFlattener and it's properties used in the XFAFlattenerProperties class. Below is the code snapshot:
public void fillData2(String src, String xml, String dest, String newDest){
throws IOException, ParserConfigurationException, SAXException, InterruptedException {
PdfReader reader = new PdfReader(src);
reader.setUnethicalReading(true);
PdfDocument pdfDoc = new PdfDocument(reader, new PdfWriter(dest), new StampingProperties().useAppendMode());
PdfAcroForm form = PdfAcroForm.getAcroForm(pdfDoc, true);
List<String> result = new ArrayList<String>(form.getFormFields().keySet());
System.out.println(result.size());
XfaForm xfa = form.getXfaForm();
xfa.fillXfaForm(new FileInputStream(xml));
xfa.write(pdfDoc);
//form.flattenFields(); throws exception
pdfDoc.close();
FileInputStream fis = new FileInputStream(dest);
FileOutputStream fos = new FileOutputStream(newDest);
XFAFlattener xfaFlattener = new XFAFlattener();
xfaFlattener.setFontSettings(new XFAFontSettings().setEmbedExternalFonts(true));
xfaFlattener.flatten(fis, fos);
fis.close();
fos.close();
}
The encountered exception is:
Exception in thread "main" java.lang.NoSuchFieldError: FONTFAMILY
at com.itextpdf.tool.xml.xtra.xfa.font.XFAFontProvider.addFonts(XFAFontProvider.java:117)
at com.itextpdf.tool.xml.xtra.xfa.font.XFAFontProvider.<init>(XFAFontProvider.java:56)
at com.itextpdf.tool.xml.xtra.xfa.XFAFlattener.initFlattener(XFAFlattener.java:643)
at com.itextpdf.tool.xml.xtra.xfa.XFAFlattener.flatten(XFAFlattener.java:201)
at com.itextpdf.tool.xml.xtra.xfa.XFAFlattener.flatten(XFAFlattener.java:396)
at com.mycompany.kitext.kitext.fillData2(kitext.java:153)
at com.mycompany.kitext.kitext.main(kitext.java:81)
Also, as per #mkl's comment, I've attached the PDF forms:
https://drive.google.com/file/d/0B6w278NcMSCrZDZoZklmVTNuOWc/view?usp=sharing
//iText RUPS /AcroForm Snapshot
https://drive.google.com/file/d/0B6w278NcMSCrZ1Q1VHc5YzY4UG8/view?usp=sharing
//Form filled with fillXfaForm()
//running low on reputation
Form filled with XFA
I've also read the pdfXFA Release notes for developers. But couldn't find a similar example. Thanks for your help and the great work on iText.
I am able to copy the contents and edit , but i am not getting the same template as the old one, the template is getting changed, and i have a image on my old file and that image is also not getting copied into my new file , rest of the other contents are getting copied,c an someone help me to make my new pdf file template as the old one, here is my code below.
public static void Main(string[] args)
{
var editedText = ExtractTextFromPdf(#"C:\backup_temp\Template.pdf");
string outputfile =#"C:\backup_temp\Result.pdf";
using (var fileStream = new FileStream(outputfile, FileMode.Create,
FileAccess.Write))
{
Document document = new Document(PageSize.A4, 25, 25, 30, 30);
PdfWriter writer = PdfWriter.GetInstance(document, fileStream);
document.Open();
document.Open();
document.Add(new Paragraph(editedText));
document.Close();
writer.Close();
fileStream.Close();
}
}
public static string ExtractTextFromPdf(string path)
{
using (PdfReader reader = new PdfReader(path))
{
StringBuilder text = new StringBuilder();
for (int i = 1; i <= reader.NumberOfPages; i++)
{
text.Append(PdfTextExtractor.GetTextFromPage(reader, i));
text.Replace("[DMxxxxxxx]", "[DM123456]");
}
return text.ToString();
}
}
As Bruno says, if your "template" is another pdf document, you can not achieve this functionality in a trivial way. Pdf documents do not automatically reflow their content. And to the best of my knowledge, there is no pdf library that will allow you to insert/replace/edit content and still produce a nice-looking document.
The best solution in your case would be:
store the template document as an easy to edit format
generate the pdf document based on this easy template
Example use-case:
I have some HTML document that contains the precise layout and images and text, and some placeholders for things I want to fill in.
I use JSoup (or some other library) to edit the DOM structure of my template, this is very easy since I can give elements IDs and simply change the content by ID. I don't need regular expressions.
I use pdfHTML (iText add-on) to convert my html document to pdf
I am trying to fill out a USCIS form and after filling it is making as read only (flattening that). I am not sure why it is doing that. Even though I don’t have any code to flatten that.
I searched the stack overflow and tried many different things (with itextsharp 5.5.9 and itext 7) but still it doesn’t work.
Here is the sample code I am using
string src = #"https://www.uscis.gov/sites/default/files/files/form/i-90.pdf";
string dest = #"C:\temp\i-90Filled.pdf";
var reader = new PdfReader(src);
reader.SetUnethicalReading(true);
var writer = new PdfWriter(dest);
PdfDocument pdfDoc = new PdfDocument(reader, writer);
// add content
PdfAcroForm form = PdfAcroForm.GetAcroForm(pdfDoc, true);
IDictionary<String, PdfFormField> fields = form.GetFormFields();
PdfFormField toSet;
fields.TryGetValue("form1[0].#subform[0].P1_Line3b_GivenName[0]", out toSet);
toSet.SetValue("John");
pdfDoc.Close();
Forms are filled like this with iTextSharp 5:
string src = #"https://www.uscis.gov/sites/default/files/files/form/i-90.pdf";
string dest = #"C:\temp\i-90Filled.pdf";
PdfReader pdfReader = new PdfReader(src);
PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileStream(
dest, FileMode.Create));
AcroFields form = pdfStamper.AcroFields;
form.SetField("form1[0].#subform[0].P1_Line3b_GivenName[0]", "John");
Note that the form you are trying to fill is a hybrid form. It contains the description of the form twice: once as an AcroForm; once as an XFA form. You may want to remove the XFA form by adding this line:
form.RemoveXfa();
For more info, read the documentation:
Is it safe to remove XFA?
How to change the text color of an AcroForm field?
Your code is using iText 7 for C#. If you want that code to work, you most certainly need to remove the XFA part as iText 7 doesn't support XFA. iText 7 was developed with PDF 2.0 in mind (this spec is to be released in 2017). XFA will be deprecated in PDF 2.0. A valid PDF 2.0 file will not be allowed to contain an XFA stream.
I'm having a very strange issue with XFA Forms in iText / iTextSharp (iTextSharp 5.3.3 via NuGet). I am trying to fill out a static XFA styled form, however my changes are not taking.
I have both editions of iText in Action and have been consulting the second edition as well as the iTextSharp code sample conversions from the book.
Background: I have an XFA Form that I can fill out manually using Adobe Acrobat on my computer. Using iTextSharp I can read what the Xfa XML data is and see the structure of the data. I am essentially trying to mimic that with iText.
What the data looks like when I add data and save in Acrobat (note: this is only the specific section for datasets)
Here is the XML file I am trying to read in to replace the existing data (note: this is the entire contexts of that file):
However, when I pass the path to the replacement XML File in and try to set the data, the new file created (a copy of the original with the data replaced) without any errors being thrown, but the data is not being updated. I can see that the new file is created and I can open it, but there is no data in the file.
Here is the code being utilized to replace the data or populate for the first time, which is a variation of http://sourceforge.net/p/itextsharp/code/HEAD/tree/trunk/book/iTextExamplesWeb/iTextExamplesWeb/iTextInAction2Ed/Chapter08/XfaMovie.cs
public void Generate(string sourceFilePath, string destinationtFilePath, string replacementXmlFilePath)
{
PdfReader pdfReader = new PdfReader(sourceFilePath);
using (MemoryStream ms = new MemoryStream())
{
using (PdfStamper stamper = new PdfStamper(pdfReader, ms))
{
XfaForm xfaForm = new XfaForm(pdfReader);
XmlDocument doc = new XmlDocument();
doc.Load(replacementXmlFilePath);
xfaForm.DomDocument = doc;
xfaForm.Changed = true;
XfaForm.SetXfa(xfaForm, stamper.Reader, stamper.Writer);
}
var bytes = ms.ToArray();
File.WriteAllBytes(destinationtFilePath, bytes);
}
}
Any help would be very much appreciated.
I found the issue. The replacement DomDocument needs to be the entire merged XML of the new document, not just the data or datasets portion.
I upvoted your answer, because it's not incorrect (I'm happy my reference to the demo led you to have another look at your code), but now that I have a second look at your original code, I think it's better to use the book example:
public byte[] ManipulatePdf(String src, String xml) {
PdfReader reader = new PdfReader(src);
using (MemoryStream ms = new MemoryStream()) {
using (PdfStamper stamper = new PdfStamper(reader, ms)) {
AcroFields form = stamper.AcroFields;
XfaForm xfa = form.Xfa;
xfa.FillXfaForm(XmlReader.Create(new StringReader(xml)));
}
return ms.ToArray();
}
}
As you can see, it's not necessary to replace the whole XFA XML. If you use the FillXfaForm method, the data is sufficient.
Note: for the C# version of the examples, see http://tinyurl.com/iiacsCH08 (change the 08 into a number from 01 to 16 for the examples of the other chapters).