[jira] [Created] (PDFBOX-2015) Hybrid reference pdf still contain XRefStm info in the trailer dictionary afterPDDocument#save

["Tim Costermans (JIRA)" <ji...@apache.org>]

Tim Costermans created PDFBOX-2015:
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             Summary: Hybrid reference pdf still contain XRefStm info in the trailer dictionary afterPDDocument#save
                 Key: PDFBOX-2015
                 URL: https://issues.apache.org/jira/browse/PDFBOX-2015
             Project: PDFBox
          Issue Type: Bug
          Components: PDModel
    Affects Versions: 1.8.4
            Reporter: Tim Costermans


{quote}
From: Tim Costermans [mailto:xxxxxx@xxxxx.com] 
Sent: maandag 31 maart 2014 12:57
To: users@pdfbox.apache.org
Subject: RE: PDFBox 1.8.4 and pdf's generated by MS Word

Hello,

I’ve written a test case to reproduce the issue. (see patch)

Could someone have a look at it and give me some pointers on how to solve this issue? I applied this patch on the 1.8.4 tag I checked out locally.
The issue is that I don’t know the pdf spec, so I don’t know how to fix this issue in the PDFBOX source code.

Word2010.pdf is the input pdf, I open the document with PDFBOX add a string to the pdf. In this case ‘Hello world!’.
Afterwards I save the pdf. 

If I look at the content of the pdf before and after I modified it (using Notepad++) I see this:

Word2010.pdf:
Line 647: <</Size 18/Root 1 0 R/Info 7 0 R/ID[<AE9AF29D5A22AE47B47C4DA29170BE64><AE9AF29D5A22AE47B47C4DA29170BE64>] /Prev 81972/XRefStm 81702>>

modified_Word2010.pdf:
Line 791: /XRefStm 81702

XRefStm is not updated although the original pdf had multiple revisions that were merged into a new pdf document.

A third party library we use defends on this XRefStm value and cannot open the pdf after it was modified. (Stack trace see previous msg)
Any help would be much appreciated.

Kind regards,

Tim Costermans
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Hi Tim,

that’s a bug. 

Explanation: The original file uses what’s called a hybrid reference. That’s for compatibility with readers which do not support compressed reference streams.  The file generated by PDFBox doesn’t use hybrid references any more but still contains the XRefStm info in the trailer dictionary.

Could you file an issue at https://issues.apache.org/jira/browse/PDFBOX

BR
Maruan
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