[TIKA-1554] Improve EMF file detection

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7
• Fix Version/s: 1.8
• Component/s: detector
• Assignee: Chris A. Mattmann
• Reporter: Luís Filipe Nassif
• Created: 20/Feb/15 16:20
• Updated: 21/Apr/15 16:03
• Resolved: 21/Apr/15 14:57

Description

I am getting many files being incorrectly detected as application/x-emf. I think the current magic is too common. According to MS documentation (https://msdn.microsoft.com/en-us/library/cc230635.aspx and https://msdn.microsoft.com/en-us/library/dd240211.aspx), it can be improved to:

<mime-type type="application/x-emf">
    <acronym>EMF</acronym>
    <_comment>Extended Metafile</_comment>
    <glob pattern="*.emf"/>
    <magic priority="50">
      <match value="0x01000000" type="string" offset="0">
      	<match value=" EMF" type="string" offset="40"/>
      </match>
    </magic>
  </mime-type>