1 2#------------------------------------------------------------------------------ 3# $File: msooxml,v 1.1 2011/01/25 18:36:19 christos Exp $ 4# msooxml: file(1) magic for Microsoft Office XML 5# From: Ralf Brown <ralf.brown@gmail.com> 6 7# .docx, .pptx, and .xlsx are XML plus other files inside a ZIP 8# archive. The first member file is normally "[Content_Types].xml". 9# Since MSOOXML doesn't have anything like the uncompressed "mimetype" 10# file of ePub or OpenDocument, we'll have to scan for a filename 11# which can distinguish between the three types 12 13# start by checking for ZIP local file header signature 140 string PK\003\004 15# make sure the first file is correct 16>0x1E string [Content_Types].xml 17# skip to the second local file header 18# since some documents include a 520-byte extra field following the file 19# header, we need to scan for the next header 20>>(18.l+49) search/2000 PK\003\004 21# now skip to the *third* local file header; again, we need to scan due to a 22# 520-byte extra field following the file header 23>>>&26 search/1000 PK\003\004 24# and check the subdirectory name to determine which type of OOXML 25# file we have 26>>>>&26 string word/ Microsoft Word 2007+ 27!:mime application/msword 28>>>>&26 string ppt/ Microsoft PowerPoint 2007+ 29!:mime application/vnd.ms-powerpoint 30>>>>&26 string xl/ Microsoft Excel 2007+ 31!:mime application/vnd.ms-excel 32>>>>&26 default x Microsoft OOXML 33!:strength +10 34