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From "Damjan Jovanovic (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SANSELAN-47) readDirectory method in TiffReader doesn't gracefully handle exceptions that can be thrown from ByteSource implementations
Date Sat, 26 Nov 2011 09:31:40 GMT

     [ https://issues.apache.org/jira/browse/SANSELAN-47?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Damjan Jovanovic resolved SANSELAN-47.
--------------------------------------

    Resolution: Fixed

Commit 1206412 to SANSELAN-55 fixes reading metadata from this image too, and unlike your
patch it can be disabled with strict mode, so I am going to resolve this.

                
> readDirectory method in TiffReader doesn't gracefully handle exceptions that can be thrown
from ByteSource implementations
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SANSELAN-47
>                 URL: https://issues.apache.org/jira/browse/SANSELAN-47
>             Project: Commons Sanselan
>          Issue Type: Improvement
>         Environment: ubuntu 8.0.4 java 1.6.0_11
>            Reporter: Gunduz Can Topal
>         Attachments: ExifReadOverflow.jpg
>
>
> In case of a corrupt or faulty exif header, we should keep the well formed ones instead
of propagating an IOException or an OutofMemory Error to the caller. Attached is a picture
taken from an HTC handset, with a faulty exif thumbnail offset, causing an OutOfMemoryException.
the patch in SANSELAN-17 turns it into an IOException and the good fields are still being
lost.
> i.e we should have the following data instead of an exception
> Exif metadata:
> Root: 
>  Modify Date: '2010:10:05 22:51:03'
>  Model: 'HTC Desire'
>  Orientation: 0
>  Unknown Tag (0x9209): 65535
>  Unknown Tag (0x9208): 0
>  Unknown Tag (0x9004): '2010:10:05 22:51:03'
>  Unknown Tag (0x9207): 65535
>  Unknown Tag (0xa403): 65535
>  Image Height: 1552
>  Image Width: 2592
>  Make: 'HTC'
>  Exif Offset: 222
>  Unknown Tag (0xde): null
>  Exif:  (jpegImageData)
>  Preview Image Start: 252
>  Preview Image Length: 0

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