You can try to guess the MIME type using File::MimeInfo, but be warned that it's not perfect and may make mistakes. 

use strict;
use File::MimeInfo;

# ...get $location from DB....

my $mtype = mimetype($location);
open my $fh, $location 
  or die "Could not open $location: $!";
print "Content-type: $mtype\n\n";
print while <$fh>;

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In reply to Re^3: opening a file for printing by friedo
in thread opening a file for printing by sulfericacid

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