37 lines
1.8 KiB
Plaintext
37 lines
1.8 KiB
Plaintext
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#------------------------------------------------------------------------------
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# $File: msooxml,v 1.5 2014/08/05 07:38:45 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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# but some libreoffice generated files put this later. Perhaps skip
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# the "[Content_Types].xml" test?
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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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!:strength +10
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# make sure the first file is correct
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>0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels
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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. Correct the mimetype with the registered ones:
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# http://technet.microsoft.com/en-us/library/cc179224.aspx
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>>>>&26 string word/ Microsoft Word 2007+
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!:mime application/vnd.openxmlformats-officedocument.wordprocessingml.document
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>>>>&26 string ppt/ Microsoft PowerPoint 2007+
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!:mime application/vnd.openxmlformats-officedocument.presentationml.presentation
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>>>>&26 string xl/ Microsoft Excel 2007+
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!:mime application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
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>>>>&26 default x Microsoft OOXML
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