Watermark on a pdf wich is embedded in a browser 2007-11-15 - By Adriano Leite Ribero
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Do you mean I have to encode my string (having the pdf content
"%PDF-1 (See http://PDF-1.ora-code.com).2......") as a base64 char[] and construct the PdfReader
object passing that char[] as a parameter? (I have to check it, but I
think PdfReader(char[]) wasn`t a valid constructor...).
Again, lot of thanks for your time,
Adriano.
2007/11/15, Paulo Soares <psoares@(protected)>:
> The problem is that PDF are binary. If you must pass it as a string encoded
it first as base64 and decode it before delivering it to PdfReader.
>
> Paulo
>
> > -- --Original Message-- --
> > From: itext-questions-bounces@(protected)
> > [mailto:itext-questions-bounces@(protected)] On
> > Behalf Of Adriano Leite Ribero
> > Sent: Thursday, November 15, 2007 8:47 AM
> > To: itext-questions@(protected)
> > Subject: [iText-questions] Watermark on a pdf wich is
> > embedded in a browser
> >
> > Hi,
> >
> > I am trying to add some watermark to a pdf document. I've followed
> > correctly the example of the file "AddWatermarkPageNumbers.java" from
> > "http://itextdocs.lowagie.com/tutorial/general/copystamp/index.php",
> > and it works properly. I have made some changes to fit the method in
> > that java file to my purpose without problems, and renamed the method
> > in it as "addWaterMark", so my method preWaterMark1, which calls it,
> > works fine:
> >
> > public static void preWaterMark1(String nameOriginalFile, String
> > text, String image, String nameOutputFile) {
> > try {
> > PdfReader reader = new PdfReader(nameOriginalFile);
> > PdfStamper stamp = new PdfStamper(reader, new
> > FileOutputStream(nameOutputFile));
> > addWaterMark(reader, stamp, text, image);
> > } catch (Exception e){
> > System.out.println("MarcaDeAgua.preWaterMark ->
> > Excepci?n: " + e);
> > }
> > }
> >
> > private static void addWaterMark(PdfReader reader, PdfStamper stamp,
> > String text, String image){... /*works ok*/}
> >
> >
> > The problem is that i need to do the same with pdf documents that
> > are not files, they are just in the browser. I start from a String
> > having the content of a document of that kind, and, following the same
> > steps I've written preWaterMark2, which uses the same method to write
> > the watermark. But what I get is just the pdf without any visible
> > changes, I can?t see any watermark. But I know the String having the
> > content of the pdf document has changed.
> >
> > public static String preWaterMark2(String pdfContent, String text,
> > String image){
> > ByteArrayOutputStream baos = new ByteArrayOutputStream();
> > try {
> > PdfReader reader = new
> > PdfReader(pdfContent.getBytes("ISO-8859 (See http://ISO-8859.ora-code.com)-1"));
> > PdfStamper stamp = new PdfStamper(reader, baos);
> > addWaterMark(reader, stamp, text, image);
> > } catch (Exception de){
> > de.printStackTrace();
> > }
> > String ret = "";
> > try{
> > if (baos.toString()!= null)
> > ret = baos.toString();
> > } catch (Exception e){
> > System.out.println("MarcaDeAgua.preWaterMark -> Excepci?n: " +
> > e.getMessage());
> > e.printStackTrace();
> > }
> > return ret;
> > }
> >
> > I guess the problem could be related to the transforming process
> > between the String having the PDF content and the byte[] with the same
> > data. I have tryed to change the "ISO-8859 (See http://ISO-8859.ora-code.com)-1", but it keeps on showing
> > me a PDF without any watermark.
> >
> > Does anybody know what could be the problem?
> >
> > Lot?s of thanks,
> > Adriano.
>
>
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