Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 1.3
    • Fix Version/s: 1.9, 1.10
    • Component/s: mime

      Description

      I've found some PDF files Tika recognizes as application/octet-stream.
      These files differs from regularly identified PDF having a different header: the %PDF-N.n string isn't at the beginning (zero offset) of the file but in the first 1024 bytes.

      PDF reference states that "The first line of a PDF file shall be a header consisting of the 5 characters %PDF– followed by a version
      number of the form 1.N, where N is a digit between 0 and 7" (http://tinyurl.com/8vnzm3c "p. 7.5.2 File Header").

      Looking further at implementation notes by Adobe (http://tinyurl.com/cbqpb24 p. 3.4.1 File Header) I've discover that: "Acrobat viewers require only that the header appear somewhere within the first 1024 bytes of the file"
      What do you think about a PDF magic match with an offset 0:1024?

      <match value="%PDF-" type="string" offset="0:1024"/>

      Thank you,
      Marco

        Attachments

        1. test.pdf
          1 kB
          Marco Quaranta
        2. hello-world-bom.pdf
          7 kB
          Matthew Buckett
        3. hello-world.pdf
          7 kB
          Matthew Buckett

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              • Assignee:
                Unassigned
                Reporter:
                101000 Marco Quaranta
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                • Created:
                  Updated:
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