msooxml 1.6 KB

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  1. #------------------------------------------------------------------------------
  2. # $File: msooxml,v 1.1 2011/01/25 18:36:19 christos Exp $
  3. # msooxml: file(1) magic for Microsoft Office XML
  4. # From: Ralf Brown <ralf.brown@gmail.com>
  5. # .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
  6. # archive. The first member file is normally "[Content_Types].xml".
  7. # Since MSOOXML doesn't have anything like the uncompressed "mimetype"
  8. # file of ePub or OpenDocument, we'll have to scan for a filename
  9. # which can distinguish between the three types
  10. # start by checking for ZIP local file header signature
  11. 0 string PK\003\004
  12. # make sure the first file is correct
  13. >0x1E string [Content_Types].xml
  14. # skip to the second local file header
  15. # since some documents include a 520-byte extra field following the file
  16. # header, we need to scan for the next header
  17. >>(18.l+49) search/2000 PK\003\004
  18. # now skip to the *third* local file header; again, we need to scan due to a
  19. # 520-byte extra field following the file header
  20. >>>&26 search/1000 PK\003\004
  21. # and check the subdirectory name to determine which type of OOXML
  22. # file we have
  23. >>>>&26 string word/ Microsoft Word 2007+
  24. !:mime application/msword
  25. >>>>&26 string ppt/ Microsoft PowerPoint 2007+
  26. !:mime application/vnd.ms-powerpoint
  27. >>>>&26 string xl/ Microsoft Excel 2007+
  28. !:mime application/vnd.ms-excel
  29. >>>>&26 default x Microsoft OOXML
  30. !:strength +10