gnu-social/plugins/Xmpp/XmppPlugin.php
2010-09-03 17:50:28 -04:00

434 lines
14 KiB
PHP

<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
*
* Send and receive notices using the XMPP network
*
* PHP version 5
*
* 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/>.
*
* @category IM
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Plugin for XMPP
*
* @category Plugin
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class XmppPlugin extends ImPlugin
{
public $server = null;
public $port = 5222;
public $user = 'update';
public $resource = null;
public $encryption = true;
public $password = null;
public $host = null; // only set if != server
public $debug = false; // print extra debug info
public $transport = 'xmpp';
function getDisplayName(){
return _m('XMPP/Jabber/GTalk');
}
/**
* Splits a Jabber ID (JID) into node, domain, and resource portions.
*
* Based on validation routine submitted by:
* @copyright 2009 Patrick Georgi <patrick@georgi-clan.de>
* @license Licensed under ISC-L, which is compatible with everything else that keeps the copyright notice intact.
*
* @param string $jid string to check
*
* @return array with "node", "domain", and "resource" indices
* @throws Exception if input is not valid
*/
protected function splitJid($jid)
{
$chars = '';
/* the following definitions come from stringprep, Appendix C,
which is used in its entirety by nodeprop, Chapter 5, "Prohibited Output" */
/* C1.1 ASCII space characters */
$chars .= "\x{20}";
/* C1.2 Non-ASCII space characters */
$chars .= "\x{a0}\x{1680}\x{2000}-\x{200b}\x{202f}\x{205f}\x{3000a}";
/* C2.1 ASCII control characters */
$chars .= "\x{00}-\x{1f}\x{7f}";
/* C2.2 Non-ASCII control characters */
$chars .= "\x{80}-\x{9f}\x{6dd}\x{70f}\x{180e}\x{200c}\x{200d}\x{2028}\x{2029}\x{2060}-\x{2063}\x{206a}-\x{206f}\x{feff}\x{fff9}-\x{fffc}\x{1d173}-\x{1d17a}";
/* C3 - Private Use */
$chars .= "\x{e000}-\x{f8ff}\x{f0000}-\x{ffffd}\x{100000}-\x{10fffd}";
/* C4 - Non-character code points */
$chars .= "\x{fdd0}-\x{fdef}\x{fffe}\x{ffff}\x{1fffe}\x{1ffff}\x{2fffe}\x{2ffff}\x{3fffe}\x{3ffff}\x{4fffe}\x{4ffff}\x{5fffe}\x{5ffff}\x{6fffe}\x{6ffff}\x{7fffe}\x{7ffff}\x{8fffe}\x{8ffff}\x{9fffe}\x{9ffff}\x{afffe}\x{affff}\x{bfffe}\x{bffff}\x{cfffe}\x{cffff}\x{dfffe}\x{dffff}\x{efffe}\x{effff}\x{ffffe}\x{fffff}\x{10fffe}\x{10ffff}";
/* C5 - Surrogate codes */
$chars .= "\x{d800}-\x{dfff}";
/* C6 - Inappropriate for plain text */
$chars .= "\x{fff9}-\x{fffd}";
/* C7 - Inappropriate for canonical representation */
$chars .= "\x{2ff0}-\x{2ffb}";
/* C8 - Change display properties or are deprecated */
$chars .= "\x{340}\x{341}\x{200e}\x{200f}\x{202a}-\x{202e}\x{206a}-\x{206f}";
/* C9 - Tagging characters */
$chars .= "\x{e0001}\x{e0020}-\x{e007f}";
/* Nodeprep forbids some more characters */
$nodeprepchars = $chars;
$nodeprepchars .= "\x{22}\x{26}\x{27}\x{2f}\x{3a}\x{3c}\x{3e}\x{40}";
$parts = explode("/", $jid, 2);
if (count($parts) > 1) {
$resource = $parts[1];
if ($resource == '') {
// Warning: empty resource isn't legit.
// But if we're normalizing, we may as well take it...
}
} else {
$resource = null;
}
$node = explode("@", $parts[0]);
if ((count($node) > 2) || (count($node) == 0)) {
throw new Exception("Invalid JID: too many @s");
} else if (count($node) == 1) {
$domain = $node[0];
$node = null;
} else {
$domain = $node[1];
$node = $node[0];
if ($node == '') {
throw new Exception("Invalid JID: @ but no node");
}
}
// Length limits per http://xmpp.org/rfcs/rfc3920.html#addressing
if ($node !== null) {
if (strlen($node) > 1023) {
throw new Exception("Invalid JID: node too long.");
}
if (preg_match("/[".$nodeprepchars."]/u", $node)) {
throw new Exception("Invalid JID node '$node'");
}
}
if (strlen($domain) > 1023) {
throw new Exception("Invalid JID: domain too long.");
}
if (!common_valid_domain($domain)) {
throw new Exception("Invalid JID domain name '$domain'");
}
if ($resource !== null) {
if (strlen($resource) > 1023) {
throw new Exception("Invalid JID: resource too long.");
}
if (preg_match("/[".$chars."]/u", $resource)) {
throw new Exception("Invalid JID resource '$resource'");
}
}
return array('node' => is_null($node) ? null : mb_strtolower($node),
'domain' => is_null($domain) ? null : mb_strtolower($domain),
'resource' => $resource);
}
/**
* Checks whether a string is a syntactically valid Jabber ID (JID),
* either with or without a resource.
*
* Note that a bare domain can be a valid JID.
*
* @param string $jid string to check
* @param bool $check_domain whether we should validate that domain...
*
* @return boolean whether the string is a valid JID
*/
protected function validateFullJid($jid, $check_domain=false)
{
try {
$parts = $this->splitJid($jid);
if ($check_domain) {
if (!$this->checkDomain($parts['domain'])) {
return false;
}
}
return $parts['resource'] !== ''; // missing or present; empty ain't kosher
} catch (Exception $e) {
return false;
}
}
/**
* Checks whether a string is a syntactically valid base Jabber ID (JID).
* A base JID won't include a resource specifier on the end; since we
* take it off when reading input we can't really use them reliably
* to direct outgoing messages yet (sorry guys!)
*
* Note that a bare domain can be a valid JID.
*
* @param string $jid string to check
* @param bool $check_domain whether we should validate that domain...
*
* @return boolean whether the string is a valid JID
*/
protected function validateBaseJid($jid, $check_domain=false)
{
try {
$parts = $this->splitJid($jid);
if ($check_domain) {
if (!$this->checkDomain($parts['domain'])) {
return false;
}
}
return ($parts['resource'] === null); // missing; empty ain't kosher
} catch (Exception $e) {
return false;
}
}
/**
* Normalizes a Jabber ID for comparison, dropping the resource component if any.
*
* @param string $jid JID to check
* @param bool $check_domain if true, reject if the domain isn't findable
*
* @return string an equivalent JID in normalized (lowercase) form
*/
function normalize($jid)
{
try {
$parts = $this->splitJid($jid);
if ($parts['node'] !== null) {
return $parts['node'] . '@' . $parts['domain'];
} else {
return $parts['domain'];
}
} catch (Exception $e) {
return null;
}
}
/**
* Check if this domain's got some legit DNS record
*/
protected function checkDomain($domain)
{
if (checkdnsrr("_xmpp-server._tcp." . $domain, "SRV")) {
return true;
}
if (checkdnsrr($domain, "ANY")) {
return true;
}
return false;
}
function daemonScreenname()
{
$ret = $this->user . '@' . $this->server;
if($this->resource)
{
return $ret . '/' . $this->resource;
}else{
return $ret;
}
}
function validate($screenname)
{
return $this->validateBaseJid($screenname, common_config('email', 'check_domain'));
}
/**
* Load related modules when needed
*
* @param string $cls Name of the class to be loaded
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function onAutoload($cls)
{
$dir = dirname(__FILE__);
switch ($cls)
{
case 'XMPPHP_XMPP':
require_once $dir . '/extlib/XMPPHP/XMPP.php';
return false;
case 'Sharing_XMPP':
case 'Queued_XMPP':
require_once $dir . '/'.$cls.'.php';
return false;
case 'XmppManager':
require_once $dir . '/'.strtolower($cls).'.php';
return false;
default:
return true;
}
}
function onStartImDaemonIoManagers(&$classes)
{
parent::onStartImDaemonIoManagers(&$classes);
$classes[] = new XmppManager($this); // handles pings/reconnects
return true;
}
function microiduri($screenname)
{
return 'xmpp:' . $screenname;
}
function sendMessage($screenname, $body)
{
$this->queuedConnection()->message($screenname, $body, 'chat');
}
function sendNotice($screenname, $notice)
{
$msg = $this->format_notice($notice);
$entry = $this->format_entry($notice);
$this->queuedConnection()->message($screenname, $msg, 'chat', null, $entry);
return true;
}
/**
* extra information for XMPP messages, as defined by Twitter
*
* @param Profile $profile Profile of the sending user
* @param Notice $notice Notice being sent
*
* @return string Extra information (Atom, HTML, addresses) in string format
*/
function format_entry($notice)
{
$profile = $notice->getProfile();
$entry = $notice->asAtomEntry(true, true);
$xs = new XMLStringer();
$xs->elementStart('html', array('xmlns' => 'http://jabber.org/protocol/xhtml-im'));
$xs->elementStart('body', array('xmlns' => 'http://www.w3.org/1999/xhtml'));
$xs->element('a', array('href' => $profile->profileurl),
$profile->nickname);
$xs->text(": ");
if (!empty($notice->rendered)) {
$xs->raw($notice->rendered);
} else {
$xs->raw(common_render_content($notice->content, $notice));
}
$xs->text(" ");
$xs->element('a', array(
'href'=>common_local_url('conversation',
array('id' => $notice->conversation)).'#notice-'.$notice->id
),sprintf(_('[%s]'),$notice->id));
$xs->elementEnd('body');
$xs->elementEnd('html');
$html = $xs->getString();
return $html . ' ' . $entry;
}
function receiveRawMessage($pl)
{
$from = $this->normalize($pl['from']);
if ($pl['type'] != 'chat') {
$this->log(LOG_WARNING, "Ignoring message of type ".$pl['type']." from $from: " . $pl['xml']->toString());
return;
}
if (mb_strlen($pl['body']) == 0) {
$this->log(LOG_WARNING, "Ignoring message with empty body from $from: " . $pl['xml']->toString());
return;
}
$this->handle_incoming($from, $pl['body']);
return true;
}
/**
* Build a queue-proxied XMPP interface object. Any outgoing messages
* will be run back through us for enqueing rather than sent directly.
*
* @return Queued_XMPP
* @throws Exception if server settings are invalid.
*/
function queuedConnection(){
if(!isset($this->server)){
throw new Exception("must specify a server");
}
if(!isset($this->port)){
throw new Exception("must specify a port");
}
if(!isset($this->user)){
throw new Exception("must specify a user");
}
if(!isset($this->password)){
throw new Exception("must specify a password");
}
return new Queued_XMPP($this, $this->host ?
$this->host :
$this->server,
$this->port,
$this->user,
$this->password,
$this->resource,
$this->server,
$this->debug ?
true : false,
$this->debug ?
XMPPHP_Log::LEVEL_VERBOSE : null
);
}
function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'XMPP',
'version' => STATUSNET_VERSION,
'author' => 'Craig Andrews, Evan Prodromou',
'homepage' => 'http://status.net/wiki/Plugin:XMPP',
'rawdescription' =>
_m('The XMPP plugin allows users to send and receive notices over the XMPP/Jabber network.'));
return true;
}
}