11-17-2005
Perl Regular Expression - Whitelist
I am creating a whitelist for User Input Validation. Here is a code snippet that allows alphanumeric and forward slash (/).
if ( $variable =~ /^[a-zA-Z0-9\/]*$/ ) #allow alphanumeric and fwd slash
{
$returnValue = 'good data';
}
else
{
$returnValue = 'Bad Data';
}
The problem that I am having is that when I pass a value such as
FWD/RWD, the code returns the value 'Bad Data'. What am I doing wrong? Why doesn't the variable recognize the forward slash in the regular expression?
Thanks in advance for your help.
Dave
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LEARN ABOUT DEBIAN
validation::class::exporter
Validation::Class::Exporter(3pm) User Contributed Perl Documentation Validation::Class::Exporter(3pm)
NAME
Validation::Class::Exporter - Simple Exporter for Validation::Class Classes
VERSION
version 7.70
SYNOPSIS
package MyApp::Class;
use Validation::Class;
use Validation::Class::Exporter;
Validation::Class::Exporter->apply_spec(
routines => ['thing'], # export routines as is
settings => [ ... ] # passed to the "load" method, see Validation::Class
);
has foo => 0;
bld sub {
shift->foo(1);
};
sub thing {
my $args = pop;
my $class = shift || caller;
# routine as a keyword
$class->{config}->{THING} = [$args];
};
package MyApp::Example;
use MyApp::Class;
thing ['this' => 'that'];
package main;
my $eg = MyApp::Example->new; # we have lift-off!!!
DESCRIPTION
This module (while experimental) encapsulates the exporting of keywords and routines. It applies the Validation::Class framework along with
any keyword routines and/or sub-routines specified with the apply_spec() method. It does this by simply by copying the spec into the
calling class.
To simplify writing exporter modules, "Validation::Class::Exporter" also imports "strict" and "warnings" into your exporter module, as well
as into modules that use it.
METHODS
apply_spec
When you call this method, "Validation::Class::Exporter" builds a custom "import" method on the calling class. The "import" method will
export the functions you specify, and can also automatically export "Validation::Class" making the calling class a Validation::Class
derived class.
This method accepts the following parameters:
o routines => [ ... ]
This list of function names only will be exported into the calling class exactly as is, the functions can be used traditionally or
as keywords so their parameter handling should be configured accordingly.
o settings => [ ... ]
This list of key/value pair will be passed to the load method imported from "Validation::Class::load" and will be applied on the
calling class.
This approach affords you some trickery in that you can utilize the load method to apply the current class' configuration to the
calling class' configuration, etc.
AUTHOR
Al Newkirk <anewkirk@ana.io>
COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Al Newkirk.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.14.2 2012-06-28 Validation::Class::Exporter(3pm)