sub parse_form {
  if ($ENV{'REQUEST_METHOD'} eq 'GET') {
    @pairs = split(/&/, $ENV{'QUERY_STRING'});
  } elsif ($ENV{'REQUEST_METHOD'} eq 'POST') {
    read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
    @pairs = split(/&/, $buffer);
  }  
  foreach $pair (@pairs) {
    local($name, $value) = split(/=/, $pair);
    $name =~ tr/+/ /;
    $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
    $value =~ tr/+/ /;
    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
    $v{$name} = $value;
  }
}
1;