I am working with a large file system (on Windows 2003) that has accumulated a large number of documents in different formats over the years. The file system has been shared amongst team members to store their files. The local custom has been to change the file extension of a document to the initials of the individual. E.g. a word document belonging to John Fredrick Smith would get a JFS ending.

I want to iterate over the file system (using our old friend File::Find) and change the names of the files back to their more conventional extensions (or at least report on them). My problem is that I need to take the individual files and determine the mime-type from their content. Has anybody tried this before? What did you use?

In reply to Discvering the MIME type of a document from its content by inman

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