From ee43823179ee627ac16ea9da8168e5f1bf9619c0 Mon Sep 17 00:00:00 2001
From: "Jannis M. Hoffmann" <jannis.hoffmann@rwth-aachen.de>
Date: Thu, 29 Oct 2020 12:13:04 +0100
Subject: Initial commit; Stable version

---
 lib/JWebmail/Plugin/ServerSideSessionData.pm | 147 +++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 lib/JWebmail/Plugin/ServerSideSessionData.pm

(limited to 'lib/JWebmail/Plugin/ServerSideSessionData.pm')

diff --git a/lib/JWebmail/Plugin/ServerSideSessionData.pm b/lib/JWebmail/Plugin/ServerSideSessionData.pm
new file mode 100644
index 0000000..9890358
--- /dev/null
+++ b/lib/JWebmail/Plugin/ServerSideSessionData.pm
@@ -0,0 +1,147 @@
+package JWebmail::Plugin::ServerSideSessionData;
+
+use Mojo::Base 'Mojolicious::Plugin';
+
+use Mojo::JSON qw(decode_json encode_json);
+use Mojo::File;
+
+use constant {
+    S_KEY => 's3d.key',
+};
+
+
+has '_session_directory';
+sub session_directory { my $self = shift; @_ ? $self->_session_directory(Mojo::File->new(@_)) : $self->_session_directory }
+
+has 'expiration';
+has 'cleanup_interval';
+
+has '_cleanup';
+sub cleanup {
+    my $self = shift;
+    if (@_) {
+        return $self->_cleanup(@_);
+    }
+    else {
+        if ($self->_cleanup < time) {
+            return 0;
+        }
+        else {
+            $self->_cleanup(time + $self->cleanup_interval);
+            return 1;
+        }
+    }
+}
+
+
+sub s3d {
+    my $self = shift;
+    my $c = shift;
+
+    # cleanup old sessions
+    if ($self->cleanup) {
+        my $t = time;
+        for ($self->session_directory->list->each) {
+            if ( $_->stat->mtime + $self->expiration < $t ) {
+                $_->remove;
+            }
+        }
+    }
+
+    my $file = $self->session_directory->child($c->session(S_KEY) || $c->req->request_id . $$);
+
+    if (-e $file) {
+        if ($file->stat->mtime + $self->expiration < time) {
+            $file->remove;
+        }
+        else {
+            $file->touch;
+        }
+    }
+    my $data = decode_json($file->slurp) if (-s $file);
+
+    my ($key, $val) = @_;
+
+    if (defined $val) { # set
+        unless (-e $file) {
+            $c->session(S_KEY, $file->basename);
+        }
+        $data = ref $data ? $data : {};
+        $data->{$key} = $val;
+
+        #$file->spurt(encode_json $data);
+        open(my $f, '>', $file) or die "$!";
+        chmod 0600, $f;
+        $f->say(encode_json $data);
+        close($f);
+    }
+    else { # get
+        return defined $key ? $data->{$key} : $data;
+    }
+};
+
+
+sub register {
+    my ($self, $app, $conf) = @_;
+
+    $self->session_directory($conf->{directory} || "/tmp/" . $app->moniker);
+    $self->expiration($conf->{expiration} || $app->sessions->default_expiration);
+    $self->cleanup_interval($conf->{cleanup_interval} || $self->expiration);
+    $self->cleanup(time + $self->cleanup_interval);
+
+    unless (-d $self->session_directory) {
+        mkdir($self->session_directory)
+            or $! ? die "failed to create directory: $!" : 1;
+    }
+
+    $app->helper( s3d => sub { $self->s3d(@_) } );
+}
+
+
+1
+
+__END__
+
+=encoding utf-8
+
+=head1 NAME
+
+ServeSideSessionData - Stores session data on the server (alias SSSD or S3D)
+
+=head1 SYNOPSIS
+
+  $app->plugin('ServeSideSessionData');
+
+  $c->s3d(data => 'Hello, S3D');
+  $c->s3d('data');
+
+=head1 DESCRIPTION
+
+Store data temporarily on the server.
+The only protetction on the server are struct user access rights.
+
+=head1 OPTIONS
+
+=head2 directory
+
+default C<< 'tmp/' . $app->moniker >>
+
+=head2 expiration
+
+default session expiration
+
+=head2 cleanup_interval
+
+default session expiration
+
+=head1 HELPERS
+
+=head2 s3d
+
+Stores and retrieves values.
+
+  $c->s3d(data => 'Hello, S3D');
+  $c->s3d('data');
+  $c->s3d->{data};
+
+=cut
\ No newline at end of file
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