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From bugzi...@apache.org
Subject [Bug 59747] xlsx file does not conform to bit patterns used by common file type detection software
Date Thu, 23 Jun 2016 13:27:50 GMT

Nick Burch <apache@gagravarr.org> changed:

           What    |Removed                     |Added
                 OS|                            |All

--- Comment #1 from Nick Burch <apache@gagravarr.org> ---
Apart from a handful of formats (eg those which require a mimetypes file that's
uncompressed as the first entry in the zip), reliably detecting container
formats can only be done by opening up the container itself

Apache Tika ships with a special detector for zip-based container formats for
this very reason!

(Tika also, on trunk, correctly detects POI-generated OOXML files as OOXML from
mime magic only)

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