Removing PDF attachments via itext
- by r00fus
I'm trying to remove attachments from a number of my pdf files (I can extract via pdftk, so preserving them is not an issue).
I coded the following based on an example found from a google search:
import java.io.FileOutputStream;
import java.io.IOException;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
class pdfremoveattachment {
public static void main(String[] args) throws IOException, DocumentException {
if (args.length < 2) {
System.out.println("Usage: java PDFremoveAttachments source.pdf target.pdf");
System.exit(1);
}
PdfReader sourcePDF = new PdfReader(args[0]);
removeAttachments(sourcePDF);
FileOutputStream targetFOS = new FileOutputStream(args[1]);
PdfStamper targetPDF = new PdfStamper(sourcePDF,targetFOS);
targetPDF.close();
}
public static void removeAttachments(PdfReader reader) {
PdfDictionary catalog = reader.getCatalog();
// System.out.println(catalog.getAsDict(PdfName.NAME)); // this would print "null"
PdfDictionary names = (PdfDictionary)PdfReader.getPdfObject(catalog.get(PdfName.NAMES));
// System.out.println(names.toString()); //this returns NPE
if( names != null) {
PdfDictionary files = (PdfDictionary) PdfReader.getPdfObject(names.get(PdfName.FILEATTACHMENT));
if( files!= null ){
for( Object key : files.getKeys() ){
files.remove((PdfName)key);
}
files = (PdfDictionary) PdfReader.getPdfObject(names.get(PdfName.EMBEDDEDFILES));
}
if( files!= null ){
for( Object key : files.getKeys() ){
files.remove((PdfName)key);
}
reader.removeUnusedObjects();
}
}
}
}
If anyone knows how I might be able to remove attachments, I'd greatly appreciate a reply.
