Well, it should only be run via a mod_rewrite rule, but it's easy enough to double check: 
if ($ENV{'QUERY_STRING'} !~ /^\d{,10}$/) {
    die 'Invalid ID';
}

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In reply to Re^2: Should I just print my own HTTP headers? by Cap'n Steve
in thread Should I just print my own HTTP headers? by Cap'n Steve

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