34 lines
1.6 KiB
Text
34 lines
1.6 KiB
Text
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#------------------------------------------------------------------------------
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# $File: msooxml,v 1.1 2011/01/25 18:36:19 christos Exp $
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# msooxml: file(1) magic for Microsoft Office XML
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# From: Ralf Brown <ralf.brown@gmail.com>
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# .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
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# archive. The first member file is normally "[Content_Types].xml".
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# Since MSOOXML doesn't have anything like the uncompressed "mimetype"
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# file of ePub or OpenDocument, we'll have to scan for a filename
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# which can distinguish between the three types
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# start by checking for ZIP local file header signature
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0 string PK\003\004
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# make sure the first file is correct
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>0x1E string [Content_Types].xml
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# skip to the second local file header
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# since some documents include a 520-byte extra field following the file
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# header, we need to scan for the next header
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>>(18.l+49) search/2000 PK\003\004
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# now skip to the *third* local file header; again, we need to scan due to a
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# 520-byte extra field following the file header
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>>>&26 search/1000 PK\003\004
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# and check the subdirectory name to determine which type of OOXML
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# file we have
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>>>>&26 string word/ Microsoft Word 2007+
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!:mime application/msword
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>>>>&26 string ppt/ Microsoft PowerPoint 2007+
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!:mime application/vnd.ms-powerpoint
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>>>>&26 string xl/ Microsoft Excel 2007+
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!:mime application/vnd.ms-excel
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>>>>&26 default x Microsoft OOXML
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!:strength +10
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