Greetings Monks!

Is it possible to use the type constraint stuff in Moose to de-taint values?

For instance, I have a class with a few file paths. Pre-Moose I would have checked them individually with a regex to de-taint them. Now I have this cool Moose type checking system, but I don't see how to de-taint values with it.

For instance:

# old way

sub logfile {
  my $self = shift;
  my $new_name = shift;
  if ( !defined($new_name) ) {
    return $self->{logfile};
  }
  if ( $new_name !~ m{^([\w/_\-\.]{1,80})$} ) {
    croak "I don't trust logfile name '$new_name'";
  }
  $self->{logfile} = $1;
}

# New Moose Way
subtype 'FilePath'
    => as 'Str'
    => where { $_ =~ m{^([\w/_\-\.]{1,80})$} }
    => message { "I don't trust file name '$_'" };

has logfile => ( is => 'rw', isa => 'FilePath',
  default => '/var/log/walrus.log' );

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In reply to Moose types & taint removal? by pileofrogs

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