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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') && !defined('LACONICA')) { exit(1); }
class PushCallbackAction extends Action
{
function handle()
{
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('Empty or invalid feed id', 400);
}
$feedsub = FeedSub::staticGet('id', $feedid);
if (!$feedsub) {
throw new ServerException('Unknown PuSH feed id ' . $feedid, 400);
}
$hmac = '';
if (isset($_SERVER['HTTP_X_HUB_SIGNATURE'])) {
$hmac = $_SERVER['HTTP_X_HUB_SIGNATURE'];
}
$post = file_get_contents('php://input');
// @fixme Queue this to a background process; we should return
// as quickly as possible from a distribution POST.
$feedsub->receive($post, $hmac);
}
/**
* 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 = $this->arg('hub_verify_token');
if ($mode != 'subscribe' && $mode != 'unsubscribe') {
common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback with mode \"$mode\"");
throw new ServerException("Bogus hub callback: bad mode", 404);
}
$feedsub = FeedSub::staticGet('uri', $topic);
if (!$feedsub) {
common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback for unknown feed $topic");
throw new ServerException("Bogus hub callback: unknown feed", 404);
}
if ($feedsub->verify_token !== $verify_token) {
common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback with bad token \"$verify_token\" for feed $topic");
throw new ServerException("Bogus hub callback: bad token", 404);
}
if ($mode != $feedsub->sub_state) {
common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback with bad mode \"$mode\" for feed $topic in state \"{$feedsub->sub_state}\"");
throw new ServerException("Bogus hub callback: mode doesn't match subscription state.", 404);
}
// OK!
if ($mode == 'subscribe') {
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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