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<?php
require(__DIR__ . '/../../constants.php');
require(LIB_PATH . '/lib_rss.php'); //Includes class autoloader
const MAX_PAYLOAD = 3145728;
header('Content-Type: text/plain; charset=UTF-8');
header('X-Content-Type-Options: nosniff');
$ORIGINAL_INPUT = file_get_contents('php://input', false, null, 0, MAX_PAYLOAD);
FreshRSS_Context::initSystem();
FreshRSS_Context::$system_conf->auth_type = 'none'; // avoid necessity to be logged in (not saved!)
//Minz_Log::debug(print_r(array('_SERVER' => $_SERVER, '_GET' => $_GET, '_POST' => $_POST, 'INPUT' => $ORIGINAL_INPUT), true), PSHB_LOG);
$key = isset($_GET['k']) ? substr($_GET['k'], 0, 128) : '';
if (!ctype_xdigit($key)) {
header('HTTP/1.1 422 Unprocessable Entity');
die('Invalid feed key format!');
}
chdir(PSHB_PATH);
$canonical = @file_get_contents('keys/' . $key . '.txt');
if ($canonical === false) {
if (!empty($_REQUEST['hub_mode']) && $_REQUEST['hub_mode'] === 'unsubscribe') {
Minz_Log::warning('Warning: Accept unknown unsubscribe', PSHB_LOG);
header('Connection: close');
exit(isset($_REQUEST['hub_challenge']) ? $_REQUEST['hub_challenge'] : '');
}
header('HTTP/1.1 410 Gone');
Minz_Log::warning('Warning: Feed key not found!: ' . $key, PSHB_LOG);
die('Feed key not found!');
}
$canonical = trim($canonical);
$canonicalHash = sha1($canonical);
$hubFile = @file_get_contents('feeds/' . $canonicalHash . '/!hub.json');
if ($hubFile === false) {
header('HTTP/1.1 410 Gone');
unlink('keys/' . $key . '.txt');
Minz_Log::error('Error: Feed info not found!: ' . $canonical, PSHB_LOG);
die('Feed info not found!');
}
$hubJson = json_decode($hubFile, true);
if (!$hubJson || empty($hubJson['key']) || $hubJson['key'] !== $key) {
header('HTTP/1.1 500 Internal Server Error');
Minz_Log::error('Error: Invalid key cross-check!: ' . $key, PSHB_LOG);
die('Invalid key cross-check!');
}
chdir('feeds/' . $canonicalHash);
$users = glob('*.txt', GLOB_NOSORT);
if (empty($users)) {
header('HTTP/1.1 410 Gone');
Minz_Log::warning('Warning: Nobody subscribes to this feed anymore!: ' . $canonical, PSHB_LOG);
unlink('../../keys/' . $key . '.txt');
$feed = new FreshRSS_Feed($canonical);
$feed->pubSubHubbubSubscribe(false);
unlink('!hub.json');
chdir('..');
recursive_unlink('feeds/' . $canonicalHash);
die('Nobody subscribes to this feed anymore!');
}
if (!empty($_REQUEST['hub_mode']) && $_REQUEST['hub_mode'] === 'subscribe') {
$leaseSeconds = empty($_REQUEST['hub_lease_seconds']) ? 0 : intval($_REQUEST['hub_lease_seconds']);
if ($leaseSeconds > 60) {
$hubJson['lease_end'] = time() + $leaseSeconds;
} else {
unset($hubJson['lease_end']);
}
$hubJson['lease_start'] = time();
if (!isset($hubJson['error'])) {
$hubJson['error'] = true; //Do not assume that WebSub works until the first successful push
}
file_put_contents('./!hub.json', json_encode($hubJson));
header('Connection: close');
exit(isset($_REQUEST['hub_challenge']) ? $_REQUEST['hub_challenge'] : '');
}
if (!empty($_REQUEST['hub_mode']) && $_REQUEST['hub_mode'] === 'unsubscribe') {
if (empty($hubJson['lease_end']) || $hubJson['lease_end'] < time()) {
header('Connection: close');
exit(isset($_REQUEST['hub_challenge']) ? $_REQUEST['hub_challenge'] : '');
} else {
header('HTTP/1.1 422 Unprocessable Entity');
die('We did not ask to unsubscribe!');
}
}
if ($ORIGINAL_INPUT == '') {
header('HTTP/1.1 422 Unprocessable Entity');
die('Missing XML payload!');
}
$simplePie = customSimplePie();
$simplePie->set_raw_data($ORIGINAL_INPUT);
$simplePie->init();
unset($ORIGINAL_INPUT);
$links = $simplePie->get_links('self');
$self = isset($links[0]) ? $links[0] : null;
if ($self !== $canonical) {
//header('HTTP/1.1 422 Unprocessable Entity');
Minz_Log::warning('Warning: Self URL [' . $self . '] does not match registered canonical URL!: ' . $canonical, PSHB_LOG);
//die('Self URL does not match registered canonical URL!');
$self = $canonical;
}
Minz_ExtensionManager::init();
Minz_Translate::init();
$nb = 0;
foreach ($users as $userFilename) {
$username = basename($userFilename, '.txt');
if (!file_exists(USERS_PATH . '/' . $username . '/config.php')) {
Minz_Log::warning('Warning: Removing broken user link: ' . $username . ' for ' . $self, PSHB_LOG);
unlink($userFilename);
continue;
}
try {
FreshRSS_Context::initUser($username);
if (FreshRSS_Context::$user_conf != null) {
Minz_ExtensionManager::enableByList(FreshRSS_Context::$user_conf->extensions_enabled);
Minz_Translate::reset(FreshRSS_Context::$user_conf->language);
}
if (!FreshRSS_Context::$user_conf->enabled) {
Minz_Log::warning('FreshRSS skip disabled user ' . $username);
continue;
}
list($updated_feeds, $feed, $nb_new_articles) = FreshRSS_feed_Controller::actualizeFeed(0, $self, false, $simplePie);
if ($updated_feeds > 0 || $feed != false) {
$nb++;
} else {
Minz_Log::warning('Warning: User ' . $username . ' does not subscribe anymore to ' . $self, PSHB_LOG);
unlink($userFilename);
}
} catch (Exception $e) {
Minz_Log::error('Error: ' . $e->getMessage() . ' for user ' . $username . ' and feed ' . $self, PSHB_LOG);
}
}
$simplePie->__destruct(); //http://simplepie.org/wiki/faq/i_m_getting_memory_leaks
unset($simplePie);
if ($nb === 0) {
header('HTTP/1.1 410 Gone');
Minz_Log::warning('Warning: Nobody subscribes to this feed anymore after all!: ' . $self, PSHB_LOG);
die('Nobody subscribes to this feed anymore after all!');
} elseif (!empty($hubJson['error'])) {
$hubJson['error'] = false;
file_put_contents('./!hub.json', json_encode($hubJson));
}
Minz_Log::notice('WebSub ' . $self . ' done: ' . $nb, PSHB_LOG);
exit('Done: ' . $nb . "\n");
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