486 lines
14 KiB
PHP
486 lines
14 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2008, 2009, StatusNet, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
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/**
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* XMPP background connection manager for XMPP-using queue handlers,
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* allowing them to send outgoing messages on the right connection.
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*
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* Input is handled during socket select loop, keepalive pings during idle.
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* Any incoming messages will be forwarded to the main XmppDaemon process,
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* which handles direct user interaction.
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*
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* In a multi-site queuedaemon.php run, one connection will be instantiated
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* for each site being handled by the current process that has XMPP enabled.
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*/
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class XmppManager extends IoManager
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{
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protected $site = null;
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protected $pingid = 0;
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protected $lastping = null;
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static protected $singletons = array();
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const PING_INTERVAL = 120;
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/**
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* Fetch the singleton XmppManager for the current site.
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* @return mixed XmppManager, or false if unneeded
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*/
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public static function get()
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{
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if (common_config('xmpp', 'enabled')) {
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$site = common_config('site', 'server');
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if (empty(self::$singletons[$site])) {
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self::$singletons[$site] = new XmppManager();
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}
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return self::$singletons[$site];
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} else {
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return false;
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}
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}
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/**
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* Tell the i/o master we need one instance for each supporting site
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* being handled in this process.
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*/
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public static function multiSite()
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{
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return IoManager::INSTANCE_PER_SITE;
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}
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function __construct()
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{
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$this->site = common_config('site', 'server');
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$this->resource = common_config('xmpp', 'resource') . 'daemon';
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}
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/**
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* Initialize connection to server.
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* @return boolean true on success
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*/
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public function start($master)
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{
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parent::start($master);
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$this->switchSite();
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require_once INSTALLDIR . "/lib/jabber.php";
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# Low priority; we don't want to receive messages
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common_log(LOG_INFO, "INITIALIZE");
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$this->conn = jabber_connect($this->resource);
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if (empty($this->conn)) {
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common_log(LOG_ERR, "Couldn't connect to server.");
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return false;
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}
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$this->log(LOG_DEBUG, "Initializing stanza handlers.");
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$this->conn->addEventHandler('message', 'handle_message', $this);
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$this->conn->addEventHandler('presence', 'handle_presence', $this);
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$this->conn->addEventHandler('reconnect', 'handle_reconnect', $this);
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$this->conn->setReconnectTimeout(600);
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jabber_send_presence("Send me a message to post a notice", 'available', null, 'available', -1);
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return !is_null($this->conn);
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}
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/**
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* Message pump is triggered on socket input, so we only need an idle()
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* call often enough to trigger our outgoing pings.
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*/
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function timeout()
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{
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return self::PING_INTERVAL;
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}
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/**
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* Lists the XMPP connection socket to allow i/o master to wake
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* when input comes in here as well as from the queue source.
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*
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* @return array of resources
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*/
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public function getSockets()
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{
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if ($this->conn) {
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return array($this->conn->getSocket());
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} else {
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return array();
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}
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}
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/**
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* Process XMPP events that have come in over the wire.
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* Side effects: may switch site configuration
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* @fixme may kill process on XMPP error
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* @param resource $socket
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*/
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public function handleInput($socket)
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{
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$this->switchSite();
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# Process the queue for as long as needed
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try {
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if ($this->conn) {
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assert($socket === $this->conn->getSocket());
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common_log(LOG_DEBUG, "Servicing the XMPP queue.");
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$this->stats('xmpp_process');
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$this->conn->processTime(0);
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}
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} catch (XMPPHP_Exception $e) {
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common_log(LOG_ERR, "Got an XMPPHP_Exception: " . $e->getMessage());
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die($e->getMessage());
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}
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}
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/**
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* Idle processing for io manager's execution loop.
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* Send keepalive pings to server.
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*
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* Side effect: kills process on exception from XMPP library.
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*
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* @fixme non-dying error handling
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*/
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public function idle($timeout=0)
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{
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if ($this->conn) {
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$now = time();
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if (empty($this->lastping) || $now - $this->lastping > self::PING_INTERVAL) {
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$this->switchSite();
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try {
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$this->sendPing();
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$this->lastping = $now;
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} catch (XMPPHP_Exception $e) {
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common_log(LOG_ERR, "Got an XMPPHP_Exception: " . $e->getMessage());
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die($e->getMessage());
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}
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}
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}
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}
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/**
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* For queue handlers to pass us a message to push out,
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* if we're active.
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*
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* @fixme should this be blocking etc?
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*
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* @param string $msg XML stanza to send
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* @return boolean success
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*/
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public function send($msg)
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{
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if ($this->conn && !$this->conn->isDisconnected()) {
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$bytes = $this->conn->send($msg);
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if ($bytes > 0) {
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$this->conn->processTime(0);
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return true;
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} else {
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return false;
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}
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} else {
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// Can't send right now...
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return false;
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}
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}
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/**
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* Send a keepalive ping to the XMPP server.
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*/
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protected function sendPing()
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{
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$jid = jabber_daemon_address().'/'.$this->resource;
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$server = common_config('xmpp', 'server');
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if (!isset($this->pingid)) {
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$this->pingid = 0;
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} else {
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$this->pingid++;
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}
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common_log(LOG_DEBUG, "Sending ping #{$this->pingid}");
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$this->conn->send("<iq from='{$jid}' to='{$server}' id='ping_{$this->pingid}' type='get'><ping xmlns='urn:xmpp:ping'/></iq>");
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}
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/**
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* Callback for Jabber reconnect event
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* @param $pl
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*/
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function handle_reconnect(&$pl)
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{
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common_log(LOG_NOTICE, 'XMPP reconnected');
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$this->conn->processUntil('session_start');
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$this->conn->presence(null, 'available', null, 'available', -1);
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}
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function get_user($from)
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{
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$user = User::staticGet('jabber', jabber_normalize_jid($from));
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return $user;
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}
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/**
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* XMPP callback for handling message input...
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* @param array $pl XMPP payload
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*/
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function handle_message(&$pl)
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{
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$from = jabber_normalize_jid($pl['from']);
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if ($pl['type'] != 'chat') {
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$this->log(LOG_WARNING, "Ignoring message of type ".$pl['type']." from $from.");
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return;
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}
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if (mb_strlen($pl['body']) == 0) {
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$this->log(LOG_WARNING, "Ignoring message with empty body from $from.");
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return;
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}
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// Forwarded from another daemon for us to handle; this shouldn't
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// happen any more but we might get some legacy items.
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if ($this->is_self($from)) {
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$this->log(LOG_INFO, "Got forwarded notice from self ($from).");
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$from = $this->get_ofrom($pl);
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$this->log(LOG_INFO, "Originally sent by $from.");
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if (is_null($from) || $this->is_self($from)) {
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$this->log(LOG_INFO, "Ignoring notice originally sent by $from.");
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return;
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}
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}
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$user = $this->get_user($from);
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// For common_current_user to work
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global $_cur;
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$_cur = $user;
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if (!$user) {
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$this->from_site($from, 'Unknown user; go to ' .
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common_local_url('imsettings') .
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' to add your address to your account');
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$this->log(LOG_WARNING, 'Message from unknown user ' . $from);
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return;
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}
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if ($this->handle_command($user, $pl['body'])) {
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$this->log(LOG_INFO, "Command message by $from handled.");
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return;
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} else if ($this->is_autoreply($pl['body'])) {
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$this->log(LOG_INFO, 'Ignoring auto reply from ' . $from);
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return;
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} else if ($this->is_otr($pl['body'])) {
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$this->log(LOG_INFO, 'Ignoring OTR from ' . $from);
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return;
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} else {
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$this->log(LOG_INFO, 'Posting a notice from ' . $user->nickname);
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$this->add_notice($user, $pl);
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}
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$user->free();
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unset($user);
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unset($_cur);
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unset($pl['xml']);
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$pl['xml'] = null;
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$pl = null;
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unset($pl);
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}
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function is_self($from)
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{
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return preg_match('/^'.strtolower(jabber_daemon_address()).'/', strtolower($from));
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}
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function get_ofrom($pl)
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{
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$xml = $pl['xml'];
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$addresses = $xml->sub('addresses');
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if (!$addresses) {
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$this->log(LOG_WARNING, 'Forwarded message without addresses');
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return null;
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}
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$address = $addresses->sub('address');
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if (!$address) {
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$this->log(LOG_WARNING, 'Forwarded message without address');
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return null;
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}
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if (!array_key_exists('type', $address->attrs)) {
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$this->log(LOG_WARNING, 'No type for forwarded message');
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return null;
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}
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$type = $address->attrs['type'];
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if ($type != 'ofrom') {
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$this->log(LOG_WARNING, 'Type of forwarded message is not ofrom');
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return null;
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}
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if (!array_key_exists('jid', $address->attrs)) {
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$this->log(LOG_WARNING, 'No jid for forwarded message');
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return null;
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}
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$jid = $address->attrs['jid'];
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if (!$jid) {
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$this->log(LOG_WARNING, 'Could not get jid from address');
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return null;
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}
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$this->log(LOG_DEBUG, 'Got message forwarded from jid ' . $jid);
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return $jid;
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}
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function is_autoreply($txt)
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{
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if (preg_match('/[\[\(]?[Aa]uto[-\s]?[Rr]e(ply|sponse)[\]\)]/', $txt)) {
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return true;
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} else if (preg_match('/^System: Message wasn\'t delivered. Offline storage size was exceeded.$/', $txt)) {
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return true;
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} else {
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return false;
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}
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}
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function is_otr($txt)
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{
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if (preg_match('/^\?OTR/', $txt)) {
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return true;
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} else {
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return false;
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}
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}
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function from_site($address, $msg)
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{
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$text = '['.common_config('site', 'name') . '] ' . $msg;
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jabber_send_message($address, $text);
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}
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function handle_command($user, $body)
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{
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$inter = new CommandInterpreter();
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$cmd = $inter->handle_command($user, $body);
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if ($cmd) {
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$chan = new XMPPChannel($this->conn);
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$cmd->execute($chan);
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return true;
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} else {
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return false;
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}
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}
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function add_notice(&$user, &$pl)
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{
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$body = trim($pl['body']);
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$content_shortened = common_shorten_links($body);
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if (Notice::contentTooLong($content_shortened)) {
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$from = jabber_normalize_jid($pl['from']);
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$this->from_site($from, sprintf(_('Message too long - maximum is %1$d characters, you sent %2$d.'),
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Notice::maxContent(),
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mb_strlen($content_shortened)));
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return;
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}
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try {
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$notice = Notice::saveNew($user->id, $content_shortened, 'xmpp');
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} catch (Exception $e) {
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$this->log(LOG_ERR, $e->getMessage());
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$this->from_site($user->jabber, $e->getMessage());
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return;
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}
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common_broadcast_notice($notice);
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$this->log(LOG_INFO,
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'Added notice ' . $notice->id . ' from user ' . $user->nickname);
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$notice->free();
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unset($notice);
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}
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function handle_presence(&$pl)
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{
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$from = jabber_normalize_jid($pl['from']);
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switch ($pl['type']) {
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case 'subscribe':
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# We let anyone subscribe
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$this->subscribed($from);
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$this->log(LOG_INFO,
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'Accepted subscription from ' . $from);
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break;
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case 'subscribed':
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case 'unsubscribed':
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case 'unsubscribe':
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$this->log(LOG_INFO,
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'Ignoring "' . $pl['type'] . '" from ' . $from);
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break;
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default:
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if (!$pl['type']) {
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$user = User::staticGet('jabber', $from);
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if (!$user) {
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$this->log(LOG_WARNING, 'Presence from unknown user ' . $from);
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return;
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}
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if ($user->updatefrompresence) {
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$this->log(LOG_INFO, 'Updating ' . $user->nickname .
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' status from presence.');
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$this->add_notice($user, $pl);
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}
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$user->free();
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unset($user);
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}
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break;
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}
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unset($pl['xml']);
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$pl['xml'] = null;
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$pl = null;
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unset($pl);
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}
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function log($level, $msg)
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{
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$text = 'XMPPDaemon('.$this->resource.'): '.$msg;
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common_log($level, $text);
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}
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function subscribed($to)
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{
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jabber_special_presence('subscribed', $to);
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}
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/**
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* Make sure we're on the right site configuration
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*/
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protected function switchSite()
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{
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if ($this->site != common_config('site', 'server')) {
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common_log(LOG_DEBUG, __METHOD__ . ": switching to site $this->site");
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$this->stats('switch');
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StatusNet::init($this->site);
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}
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}
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}
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