[jira] Commented: (PDFBOX-720) Inconsistency in parsing PDFs between Windows and Linux

["David Hedley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12878884#action_12878884 ] 

David Hedley commented on PDFBOX-720:
-------------------------------------

This is a more general issue of incorrect parsing of incrementally updated PDFs which I am also experiencing. Is anyone currently investigating this?

> Inconsistency in parsing PDFs between Windows and Linux
> -------------------------------------------------------
>
>                 Key: PDFBOX-720
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-720
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Parsing
>         Environment: Windows Vista 32-bit, Sun JDK 1.5.0_06, PDFBox HEAD tag (revision 941073)
> vs.
> Red Hat Linux, 2.6.9-67.ELsmp kernel, Java 1.5.0_06, PDFBox HEAD tag (revision 941073)
>            Reporter: Adam Nichols
>             Fix For: 1.2.0
>
>         Attachments: 238_Page_Report.pdf
>
>
> Run this same code using the same PDF and you'll get different results on Linux than on Windows.  Regardless of which one you consider "correct", it should be consistent.
> doc = PDDocument.load(inputFile);
> PDDocumentOutline outline = doc.getDocumentCatalog().getDocumentOutline();
> if(outline == null)
>     System.out.println("Document outline was null");
> else
>     System.out.println("Document outline was not null");
> Some interesting notes about this PDF: Seems that Acrobat Distiller 8.1.0 basically just concatenated two PDFs into one.  There are two trailers, they both refer to object "1600 0" as the root.  1600 0 appears multiple times, one time it doesn't have "Outlines" in the dictionary, the other time it has "Outlines 1667 0".  Windows picks up the latter and shows the outline correctly.  Linux picks up the former and thus returns null for the outline.  I tried debugging through PDFParser and BaseParser, but I'm not really sure how that code works and I quickly got lost.

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