#!/usr/bin/perl
&parse_form;
print "Content-type:text/html\n\n";   
if ($v{'id'} < 4000000 || $v{'id'} > 9999999 || !$v{'passwd'}) {
  print 'Invalid information : error';
  exit;
}
$filename = 'data.txt';
open(myfile,"$filename");
@getrec = <myfile>;
close(myfile);
foreach $rec (@getrec) {
  ($id,$passwd) = split(',',$rec);
  if ($id eq $v{'id'}) {
    print 'Duplicate information : error';
	exit;
  }
}
open(myfile,">>$filename");
print myfile "$v{'id'},$v{'passwd'},\n";
close(myfile);
print "Add new record : ok";

sub parse_form {
  @pairs = split(/&/,<STDIN>);
  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;    
    $value =~ s/,/&#44;/g; 
    $v{$name} = $value;
  }
}