$allowed{action} = 'post|edit|delete|long|short';
$query->{action} eq "post"
  ? (($allowed{msgid} = '^(\d+|new)$'),
    ($allowed{data}  = '^(([^|+]*[^|]+.*\|){4}[^|+]*[^|]+.*)$'))
  : 1;
$query->{action} eq "edit"
  ? ($allowed{msgid} = '^(\d+|new)$')
  : 1;
$query->{action} eq "delete"
  ? ($allowed{msgid} = '^(\d+)$')
  : 1;
$query->{action} eq "long"
  ? (($allowed{sort}  = '^(author|date|subject|expire)$'),
    ($allowed{msgid} = '^(\d*|all)$'))
  : 1;
$query->{action} eq "short"
  ? (($allowed{sort}  = '^(author|date|subject|expire)$'),
    ($allowed{msgid} = '^(\d+|all)$'))
  : 1;

foreach $key (keys %$query){
  exists $allowed{$key} ? 1 : return 0;
  return 0 if $query->{$key}!~/$allowed{$key}/;
  1;
}