ICEpdf
  1. ICEpdf
  2. PDF-321

Unexpected end of zlib input stream

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.2.1
          • Fix Version/s: 5.0.0 alpha1, 5.0
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            A ICEpdf users reported an error opening the PDF file attached to the form (2_pdfsam_52313.pdf). I've taken a quick look at the problem but didn't find any immediate cause. The stream being loaded is a child of a Object Stream which might mean an offset error. Further analysis is needed.

              Issue Links

              depends on

              Bug - A problem which impairs or prevents the functions of the product. PDF-397 Unexpected end of zlib in page content streams

              • Major - Major loss of function.
              • Closed

                Activity

                Descending order - Click to sort in ascending order
                Patrick Corless made changes -
                Status Resolved [ 5 ] Closed [ 6 ]
                Patrick Corless made changes -
                Fix Version/s 5.0.0 alpha1 [ 10676 ]
                Patrick Corless made changes -
                Fix Version/s 5.0 [ 10314 ]
                Fix Version/s 4.5 [ 10342 ]
                Migration made changes -
                Status Open [ 1 ] Resolved [ 5 ]
                Resolution Fixed [ 1 ]
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                Patrick Corless added a comment - - edited

                Fix Version/s: 4.3.4
                (was: 4.5)
                Resolution: Fixed
                It looks like there is a long running bug with the InflaterInputStream were it will thought he EOF error under very special circumstances. The good news is that this exception can be caught and the result of the decoded stream can be kept.

                Show
                Patrick Corless added a comment - - edited Fix Version/s: 4.3.4 (was: 4.5) Resolution: Fixed It looks like there is a long running bug with the InflaterInputStream were it will thought he EOF error under very special circumstances. The good news is that this exception can be caught and the result of the decoded stream can be kept.
                Repository Revision Date User Message
                ICEsoft Public SVN Repository #30890 Mon Sep 17 15:31:08 MDT 2012 patrick.corless PDF-321 added a catch for an IO error that occurs on a very small percentage of flatedecode encode streams. Basically the error can be eaten and the decoded stream returned.
                Files Changed
                Commit graph MODIFY /icepdf/branches/icepdf-4.3.3/icepdf/core/src/org/icepdf/core/pobjects/filters/ChunkingInputStream.java
                Repository Revision Date User Message
                ICEsoft Public SVN Repository #30889 Mon Sep 17 15:30:58 MDT 2012 patrick.corless PDF-321 added a catch for an IO error that occurs on a very small percentage of flatedecode encode streams. Basically the error can be eaten and the decoded stream returned.
                Files Changed
                Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/filters/ChunkingInputStream.java
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                Patrick Corless added a comment -

                Added second test case to the support drive.

                Show
                Patrick Corless added a comment - Added second test case to the support drive.
                Arran Mccullough made changes -
                Salesforce Case [5007000000NJFLU]
                Patrick Corless made changes -
                Salesforce Case []
                Fix Version/s 4.5 [ 10342 ]
                Fix Version/s 5.0 [ 10314 ]
                Hide
                Permalink
                Patrick Corless added a comment -

                Another sample came in that has a similar problem. So I dug a little deeper and tried out a few other zip libraries that are out there. Unfortunately they all failed when decoding the streams in question. However they do give more information as to where the error is coming from. jzlib-1.1.1 seemed to point to a missing footer table which will be helpful when reading about how zip streams are encoded.

                We can't sub in a new zip engine on a minor release but with a little luck can fix this with an open source library and or figure out at way to add a footer to the stream. Doing some performance analysis would also be good to see which library if any is more efficient.

                Show
                Patrick Corless added a comment - Another sample came in that has a similar problem. So I dug a little deeper and tried out a few other zip libraries that are out there. Unfortunately they all failed when decoding the streams in question. However they do give more information as to where the error is coming from. jzlib-1.1.1 seemed to point to a missing footer table which will be helpful when reading about how zip streams are encoded. We can't sub in a new zip engine on a minor release but with a little luck can fix this with an open source library and or figure out at way to add a footer to the stream. Doing some performance analysis would also be good to see which library if any is more efficient.
                Patrick Corless made changes -
                Link This issue depends on PDF-397 [ PDF-397 ]
                Patrick Corless made changes -
                Field Original Value New Value
                Salesforce Case []
                Fix Version/s 5.0 [ 10314 ]
                Fix Version/s 4.3 [ 10266 ]
                Hide
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                Patrick Corless added a comment -

                Pushing out.

                Show
                Patrick Corless added a comment - Pushing out.
                Patrick Corless created issue -

                  People

                  • Assignee:
                    Patrick Corless
                    Reporter:
                    Patrick Corless
                  • Votes:
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                    Watchers:
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                    Dates

                    • Created:
                      Updated:
                      Resolved: