May be you could try this (You said 'uploading' so I'm assuming it may be web-based):

use CGI;

my $q = new CGI;

my $file = $q->param('myfile') 

my $type = $q->uploadInfo($file)->{'Content-Type'};

print "$type\n";

[download]

In reply to Re: Getting File Type using Regular Expressions by kiat
in thread Getting File Type using Regular Expressions by bkiahg

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