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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @package FeedSubPlugin
* @maintainer Brion Vibber <brion@status.net>
*/
if (!defined('STATUSNET')) {
exit(1);
}
class PushCallbackAction extends Action
{
function handle()
{
StatusNet::setApi(true); // Minimize error messages to aid in debugging
parent::handle();
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$this->handlePost();
} else {
$this->handleGet();
}
}
/**
* Handler for POST content updates from the hub
*/
function handlePost()
{
$feedid = $this->arg('feed');
common_log(LOG_INFO, "POST for feed id $feedid");
if (!$feedid) {
throw new ServerException(_m('Empty or invalid feed id.'), 400);
}
$feedsub = FeedSub::staticGet('id', $feedid);
if (!$feedsub) {
// TRANS: Server exception. %s is a feed ID.
throw new ServerException(sprintf(_m('Unknown PuSH feed id %s'),$feedid), 400);
}
$hmac = '';
if (isset($_SERVER['HTTP_X_HUB_SIGNATURE'])) {
$hmac = $_SERVER['HTTP_X_HUB_SIGNATURE'];
}
$post = file_get_contents('php://input');
// Queue this to a background process; we should return
// as quickly as possible from a distribution POST.
// If queues are disabled this'll process immediately.
$data = array('feedsub_id' => $feedsub->id,
'post' => $post,
'hmac' => $hmac);
$qm = QueueManager::get();
$qm->enqueue($data, 'pushin');
}
/**
* Handler for GET verification requests from the hub.
*/
function handleGet()
{
$mode = $this->arg('hub_mode');
$topic = $this->arg('hub_topic');
$challenge = $this->arg('hub_challenge');
$lease_seconds = $this->arg('hub_lease_seconds');
$verify_token = $this->arg('hub_verify_token');
common_log(LOG_INFO, __METHOD__ . ": sub verification mode: $mode topic: $topic challenge: $challenge lease_seconds: $lease_seconds verify_token: $verify_token");
if ($mode != 'subscribe' && $mode != 'unsubscribe') {
// TRANS: Client exception. %s is an invalid value for hub.mode.
throw new ClientException(sprintf(_m('Bad hub.mode "$s".',$mode)), 404);
}
$feedsub = FeedSub::staticGet('uri', $topic);
if (!$feedsub) {
// TRANS: Client exception. %s is an invalid feed name.
throw new ClientException(sprintf(_m('Bad hub.topic feed "%s".'),$topic), 404);
}
if ($feedsub->verify_token !== $verify_token) {
// TRANS: Client exception. %1$s the invalid token, %2$s is the topic for which the invalid token was given.
throw new ClientException(sprintf(_m('Bad hub.verify_token %1$s for %2$s.'),$token,$topic), 404);
}
if ($mode == 'subscribe') {
// We may get re-sub requests legitimately.
if ($feedsub->sub_state != 'subscribe' && $feedsub->sub_state != 'active') {
// TRANS: Client exception. %s is an invalid topic.
throw new ClientException(sprintf(_m('Unexpected subscribe request for %s.'),$topic), 404);
}
} else {
if ($feedsub->sub_state != 'unsubscribe') {
// TRANS: Client exception. %s is an invalid topic.
throw new ClientException(sprintf(_m('Unexpected unsubscribe request for %s.'),$topic), 404);
}
}
if ($mode == 'subscribe') {
if ($feedsub->sub_state == 'active') {
common_log(LOG_INFO, __METHOD__ . ': sub update confirmed');
} else {
common_log(LOG_INFO, __METHOD__ . ': sub confirmed');
}
$feedsub->confirmSubscribe($lease_seconds);
} else {
common_log(LOG_INFO, __METHOD__ . ": unsub confirmed; deleting sub record for $topic");
$feedsub->confirmUnsubscribe();
}
print $challenge;
}
}
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