11-15-2004
You may use session (such as CGI::Session) to handle this. Generate a random ID as hidden form parameter in your form, and write it to the session when finished updating the records. Before each save operation, check whether the ID exists in the session. If so, the page has been refreshed; otherwise, commit it.
Form parameters can be refreshed, but session entries are created on the server so they are a reliable source to detect occurrences of page refreshes.
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LEARN ABOUT DEBIAN
plack::session
Plack::Session(3pm) User Contributed Perl Documentation Plack::Session(3pm)
NAME
Plack::Session - Middleware for session management
SYNOPSIS
# Use with Middleware::Session
enable "Session";
# later in your app
use Plack::Session;
my $app = sub {
my $env = shift;
my $session = Plack::Session->new($env);
$session->id;
$session->get($key);
$session->set($key, $value);
$session->remove($key);
$session->keys;
$session->expire;
};
DESCRIPTION
This is the core session object, you probably want to look at Plack::Middleware::Session, unless you are writing your own session
middleware component.
METHODS
new ( $env )
The constructor takes a PSGI request env hash reference.
id This is the accessor for the session id.
Session Data Management
These methods allows you to read and write the session data like Perl's normal hash.
get ( $key )
set ( $key, $value )
remove ( $key )
keys
session, dump
Session Lifecycle Management
expire
This method can be called to expire the current session id.
BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to
cpan-RT.
AUTHOR
Stevan Little <stevan.little@iinteractive.com>
COPYRIGHT AND LICENSE
Copyright 2009, 2010 Infinity Interactive, Inc.
<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.12.4 2011-03-29 Plack::Session(3pm)