While CGI::Untaint would be good for untainting a mass of variables. It is basicaly more like data validation. To me after looking at CGI::Untaint's documentation it bears a resemblance to a very basic version of Data::FormValidator and is obsoleted by it. Data::FormValidator can be given a regex as a rule to check the input value of a form field. For example:

use strict;
use CGI;
use Data::FormValidator;

my $q = new CGI;

# hashref of data
my $UnsafeData = $q->Vars;


my $validator = new Data::FormValidator( "input_profiles.pl" );
my ( $valid, $missing, $invalid, $unknown ) = $validator->validate(  $
+UnsafeData, "customer_infos" );
[download]

An example of input_profiles.pl taken from the documentation

           {
               customer_infos => {
                   optional     =>
                       [ qw( company fax country password password_con
+firmation file_path) ],
                   required     =>
                       [ qw( fullname phone email address) ],
                   required_regexp => '/city|state|zipcode/',
                   optional_regexp => '/_province$/',
                   constraints  =>
                       {
                           file_path   => '/([-\w.\/]*)/',
                           email       => "email",
                           fax         => "american_phone",
                           phone       => "american_phone",
                           zipcode     => '/^\s*\d{5}(?:[-]\d{4})?\s*$
+/',
                           state       => "state",
                       },
                   constraint_regexp_map => {
                       '/_postcode$/'  => 'postcode',
                       '/_province$/'  => 'province,
                   },
                   dependency_groups  => {
                       password_group => [qw/password password_confirm
+ation/]
                   }
                   defaults => {
                       country => "USA",
                   },
               }
}
[download]

The data in $valid is now considered untainted and all unexpected fields are put in $unknown as an array ref. Read the documentation on Data::FormValidator as this module will not only allow you to set the rules of the data coming in but also weed out the data that you don't want.

BMaximus

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.