NAME

Plack::App::PubSubHubbub::Subscriber - PubSubHubbub subscriber implementation as a Plack App

SYNOPSIS

use Plack::Builder;
use Plack::App::PubSubHubbub::Subscriber;
use Plack::App::PubSubHubbub::Subscriber::Config;
use Plack::App::PubSubHubbub::Subscriber::Client;

my $conf = Plack::App::PubSubHubbub::Subscriber::Config->new(
    callback => "http://example.tld:8081/callback",
    lease_seconds => 86400,
    verify => 'sync',
);

my $app = Plack::App::PubSubHubbub::Subscriber->new(
    config => $conf
    on_verify => sub {
        my ($topic, $token, $mode, $lease) = @_;
        ...
        return 1;
    },
    on_ping => sub {
        my ($content_type, $content, $token) = @_;
        print $content;
    },
);

my $client = Plack::App::PubSubHubbub::Subscriber::Client(
    config => $conf,
);

builder {
    mount $app->callback_path, $app;
    mount '/subscribe' => sub {
        ...
        $client->subscribe( $hub, $topic, $token );
        ...
    };
    mount '/unsubscribe' => sub {
        ...
        $client->unsubscribe( $hub, $topic, $token );
        ...
    };
};

DESCRIPTION

PubSubHubbub subscriber implementation in the form of a Plack app and a client. Originally developed for storyfindr.com

$self->config( $conf )

Get/Set the Plack::App::PubSubHubbub::Subscriber::Config object. This same config object can be use to instanciate the client Plack::App::PubSubHubbub::Subscriber::Client

$self->on_ping( sub { my ($content_type, $content, $token) = @_ } )

Triggered when a new ping is received, the parameters are the content type, the raw content, and the token in that order. Note that the token is available only if the configuration flag token_in_path is set (the default). Also note that, in any case, the token is undef if you didn't use a token to (un)subcribe. The return value is ignore.

$self->on_verify( sub { my ($topic, $token, $mode, $lease) = @_ } )

Triggered when a subscribe/unsubscribe request is received, the parameters are the topic, the token, the mode, and the number of seconds of the lease, in that order. Note that the token is undef if you didn't use a token to (un)subcribe. Given these parameters, this coderef must return 1 for verified, or 0 for rejected.

$self->callback_path

Return the path part of the callback URL. Useful for doing "mount $app->callback_path, $app;"

LIMITATION

the "Authenticated Content Distribution" is not supported.

SEE ALSO

the specs, Net::PubSubHubbub::Publisher

AUTHOR

Antoine Imbert, <antoine.imbert at gmail.com>

LICENSE AND COPYRIGHT

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.