Commit | Line | Data |
c4a322ec |
1 | |
2 | package MooseX::Storage::Base::WithChecksum; |
3 | use Moose::Role; |
4 | |
5 | use Digest::MD5 ('md5_hex'); |
6 | use Data::Dumper (); |
7 | use MooseX::Storage::Engine; |
8 | |
9 | our $VERSION = '0.01'; |
10 | |
11 | sub pack { |
12 | my ($self, $salt) = @_; |
13 | my $e = MooseX::Storage::Engine->new( object => $self ); |
14 | my $collapsed = $e->collapse_object; |
15 | |
16 | # create checksum |
17 | |
18 | local $Data::Dumper::Sortkeys = 1; |
19 | my $dumped = Data::Dumper::Dumper($collapsed); |
20 | |
21 | #warn $dumped; |
22 | |
23 | $salt ||= $dumped; |
24 | |
25 | $collapsed->{checksum} = md5_hex($dumped, $salt); |
26 | |
27 | return $collapsed; |
28 | } |
29 | |
30 | sub unpack { |
31 | my ($class, $data, $salt) = @_; |
32 | |
33 | # check checksum on data |
34 | |
35 | my $old_checksum = $data->{checksum}; |
36 | delete $data->{checksum}; |
37 | |
38 | local $Data::Dumper::Sortkeys = 1; |
39 | my $dumped = Data::Dumper::Dumper($data); |
40 | |
41 | #warn $dumped; |
42 | |
43 | $salt ||= $dumped; |
44 | |
45 | my $checksum = md5_hex($dumped, $salt); |
46 | |
47 | ($checksum eq $old_checksum) |
48 | || confess "Bad Checksum got=($checksum) expected=($data->{checksum})"; |
49 | |
50 | my $e = MooseX::Storage::Engine->new(class => $class); |
51 | $class->new($e->expand_object($data)); |
52 | } |
53 | |
54 | 1; |
55 | |
56 | __END__ |
57 | |
58 | =pod |
59 | |
60 | =head1 NAME |
61 | |
62 | MooseX::Storage::Base::WithChecksum |
63 | |
64 | =head1 SYNOPSIS |
65 | |
66 | =head1 DESCRIPTION |
67 | |
68 | =head1 METHODS |
69 | |
70 | =over 4 |
71 | |
72 | =item B<pack (?$salt)> |
73 | |
74 | =item B<unpack ($data, ?$salt)> |
75 | |
76 | =back |
77 | |
78 | =head2 Introspection |
79 | |
80 | =over 4 |
81 | |
82 | =item B<meta> |
83 | |
84 | =back |
85 | |
86 | =head1 BUGS |
87 | |
88 | All complex software has bugs lurking in it, and this module is no |
89 | exception. If you find a bug please either email me, or add the bug |
90 | to cpan-RT. |
91 | |
92 | =head1 AUTHOR |
93 | |
94 | Stevan Little E<lt>stevan.little@iinteractive.comE<gt> |
95 | |
96 | =head1 COPYRIGHT AND LICENSE |
97 | |
98 | Copyright 2007 by Infinity Interactive, Inc. |
99 | |
100 | L<http://www.iinteractive.com> |
101 | |
102 | This library is free software; you can redistribute it and/or modify |
103 | it under the same terms as Perl itself. |
104 | |
105 | =cut |