sub get_cgi_params_parse ($;$){
  my ($str, $params) = @_;
  my $res = {};
  
  $str =~ tr/+/ /;
  foreach (split /&/, $str){
    my ($one, $two) = split /=/, $_;
    $one =~ s/%([\da-fA-F][\dA-Fa-f])/pack("C", hex($1))/eg;
    $two =~ s/%([\da-fA-F][\dA-Fa-f])/pack("C", hex($1))/eg;
    if (exists $res->{$one}){
      $res->{$one} .= "\n".$two;
    }else{
      $res->{$one} = $two;
    }
    $params->{$one} = $res->{$one};
  }
  
  return $res;
}
sub get_cgi_params (;$$$$){
  my ($get_str, $post_str, $cookie_str, $force_get) = @_;
  my $res = {_names => [], get => {}, post => {}, cookies => {}, vars => {}};
  $force_get = 0 unless defined $force_get;
  
  $cookie_str = $ENV{'HTTP_COOKIE'} unless defined $cookie_str;
  if ($cookie_str){
    foreach (split /; /, $cookie_str){
      m/^(.+?)(=(.*))?$/;
      $res->{cookies}->{$1} = $3;
    }
	}
  
  if ($force_get or $ENV{'REQUEST_METHOD'} eq "GET" ){
    $get_str = $ENV{'QUERY_STRING'} unless defined $get_str;
    $res->{get}  = get_cgi_params_parse $get_str,  $res->{vars} if $get_str;
  }
  if ($ENV{'REQUEST_METHOD'} eq "POST"){
    read(STDIN, $post_str, $ENV{'CONTENT_LENGTH'}) unless defined $post_str;
    $res->{post} = get_cgi_params_parse $post_str, $res->{vars} if $post_str;
  }
  return $res;
}