1 package Koha::CookieManager;
3 # Copyright 2022 Rijksmuseum, Koha Development Team
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it
8 # under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # Koha is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
22 # use Data::Dumper qw( Dumper );
23 # use List::MoreUtils qw( uniq );
27 use constant ALLOW_LIST_VAR => 'removable_cookie';
33 Koha::CookieManager - Object for unified handling of cookies in Koha
37 use Koha::CookieManager;
38 my $mgr = Koha::CookieManager->new;
41 $cookie_list = $mgr->replace_in_list( [ $cookie1, $cookie2_old ], $cookie2_new );
43 # Clear cookies (governed by koha-conf removable_cookie lines)
44 $cookie_list = $mgr->clear_if_allowed( $cookie1, $cookie2, $cookie3_name );
49 The current object allows you to clear cookies in a list based on the allow
50 list in koha-conf.xml. It also offers a method to replace the old version of
51 a cookie by a new one.
53 It could be extended by (gradually) routing cookie creation through it in order
54 to consistently fill cookie parameters like httponly, secure and samesite flag,
55 etc. And could serve to register all our cookies in a central location.
61 my $mgr = Koha::CookieManager->new({}); # parameters for extensions
66 my ( $class, $params ) = @_;
67 my $self = bless $params//{}, $class;
68 my $allowed = C4::Context->config(ALLOW_LIST_VAR) || []; # expecting scalar or arrayref
69 $allowed = [ $allowed ] if ref($allowed) eq q{};
70 $self->{_remove_allowed} = { map { $_ => 1 } @$allowed };
71 $self->{_secure} = C4::Context->https_enabled;
75 =head2 clear_if_allowed
77 $cookies = $self->clear_if_allowed( $query->cookie, @$cookies );
79 Arguments: either cookie names or cookie objects (CGI::Cookie).
80 Note: in the example above $query->cookie is a list of cookie names as returned
83 Returns an arrayref of cookie objects: empty, expired cookies for those passed
84 by name or object that are on the allow list, together with the remaining
85 (untouched) cookie objects not on that list.
89 sub clear_if_allowed {
90 my ( $self, @cookies ) = @_;
93 foreach my $c ( @cookies ) {
96 if( $type eq 'CGI::Cookie' ) {
98 } elsif( $type ) { # not expected: ignore
104 if( $self->{_remove_allowed}->{$name} ) {
105 next if $seen->{ $name };
106 push @rv, CGI::Cookie->new(
107 # -expires explicitly omitted to create shortlived 'session' cookie
108 # -HttpOnly explicitly set to 0: not really needed here for the
109 # cleared httponly cookies, while the js cookies should be 0
110 -name => $name, -value => q{}, -HttpOnly => 0,
111 $self->{_secure} ? ( -secure => 1 ) : (),
113 $seen->{ $name } = 1; # prevent duplicates
114 } elsif( $type eq 'CGI::Cookie' ) {
121 =head2 replace_in_list
123 $list2 = $mgr->replace_in_list( $list1, $cookie );
125 Add $cookie to $list1, removing older occurrences in list1.
126 $list1 is a list of CGI::Cookie objects.
127 $cookie must be a CGI::Cookie object; if it is not, only
128 cookie objects in list1 are returned (filtering list1).
130 Returns an arrayref of CGI::Cookie objects.
134 sub replace_in_list {
135 my ( $self, $list, $cookie ) = @_;
136 my $name = ref($cookie) eq 'CGI::Cookie' ? $cookie->name : q{};
139 foreach my $c ( @$list ) {
140 next if ref($c) ne 'CGI::Cookie';
141 push @result, $c if !$name or $c->name ne $name;
143 push @result, $cookie if $name;
147 =head1 INTERNAL ROUTINES