ICEpdf
  1. ICEpdf
  2. PDF-1295

document with bad xref offsets doesn't load

          Details

          • Type: Bug Bug
          • Status: Resolved
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 6.3.1
          • Fix Version/s: 6.3.2
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            A community member has submitted a PDF that doesn't load at all, it just shows up as a black dot in the RI.

              Activity

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              Patrick Corless created issue -
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              Patrick Corless added a comment -

              The PDF the an xref offset error that is just bad enough to allow the catalog to be found by our parser and the root page tree. However any deeper into the xref table and parser starts kicking back primitives instead of the requested object.

              To address this I've added some validation checks that are pretty low cost where the root page tree children are referenced and parsed by the object parser. If any of the object come back as none pages we switch over to linear traversal.

              This sort of problem will be solved by a new object parser I've been working on for quite some time now.

              Show
              Patrick Corless added a comment - The PDF the an xref offset error that is just bad enough to allow the catalog to be found by our parser and the root page tree. However any deeper into the xref table and parser starts kicking back primitives instead of the requested object. To address this I've added some validation checks that are pretty low cost where the root page tree children are referenced and parsed by the object parser. If any of the object come back as none pages we switch over to linear traversal. This sort of problem will be solved by a new object parser I've been working on for quite some time now.
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #52867 Tue Jan 08 21:13:24 MST 2019 patrick.corless PDF-1295 added a quick xref validity check to try and detect corrupt
              pdf files and allow document loader to fall back on a linear traversal.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/core-awt/src/main/java/org/icepdf/core/pobjects/Document.java
              Patrick Corless made changes -
              Field Original Value New Value
              Fix Version/s 6.3.2 [ 13175 ]
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              Patrick Corless added a comment -

              Marking as fixed.

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              Patrick Corless added a comment - Marking as fixed.
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #52869 Wed Jan 09 20:59:03 MST 2019 patrick.corless PDF-1295 added a quick xref validity check to try and detect corrupt pdf added PageTree and Reference to the check
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/core-awt/src/main/java/org/icepdf/core/pobjects/Document.java
              Judy Guglielmin made changes -
              Support Case References Support Case 14419:- https://icesoft.my.salesforce.com/5000g000020hTwD?srPos=0&srKp=500

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: