458 lines
16 KiB
PHP
458 lines
16 KiB
PHP
<?php
|
|
/*
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2009-2010, 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/>.
|
|
*/
|
|
|
|
if (!defined('STATUSNET')) {
|
|
exit(1);
|
|
}
|
|
|
|
/**
|
|
* @package OStatusPlugin
|
|
* @maintainer Brion Vibber <brion@status.net>
|
|
*/
|
|
|
|
/*
|
|
PuSH subscription flow:
|
|
|
|
$profile->subscribe()
|
|
sends a sub request to the hub...
|
|
|
|
main/push/callback
|
|
hub sends confirmation back to us via GET
|
|
We verify the request, then echo back the challenge.
|
|
On our end, we save the time we subscribed and the lease expiration
|
|
|
|
main/push/callback
|
|
hub sends us updates via POST
|
|
|
|
*/
|
|
class FeedDBException extends FeedSubException
|
|
{
|
|
public $obj;
|
|
|
|
function __construct($obj)
|
|
{
|
|
parent::__construct('Database insert failure');
|
|
$this->obj = $obj;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* FeedSub handles low-level PubHubSubbub (PuSH) subscriptions.
|
|
* Higher-level behavior building OStatus stuff on top is handled
|
|
* under Ostatus_profile.
|
|
*/
|
|
class FeedSub extends Managed_DataObject
|
|
{
|
|
public $__table = 'feedsub';
|
|
|
|
public $id;
|
|
public $uri;
|
|
|
|
// PuSH subscription data
|
|
public $huburi;
|
|
public $secret;
|
|
public $sub_state; // subscribe, active, unsubscribe, inactive
|
|
public $sub_start;
|
|
public $sub_end;
|
|
public $last_update;
|
|
|
|
public $created;
|
|
public $modified;
|
|
|
|
public static function schemaDef()
|
|
{
|
|
return array(
|
|
'fields' => array(
|
|
'id' => array('type' => 'serial', 'not null' => true, 'description' => 'FeedSub local unique id'),
|
|
'uri' => array('type' => 'varchar', 'not null' => true, 'length' => 255, 'description' => 'FeedSub uri'),
|
|
'huburi' => array('type' => 'text', 'description' => 'FeedSub hub-uri'),
|
|
'secret' => array('type' => 'text', 'description' => 'FeedSub stored secret'),
|
|
'sub_state' => array('type' => 'enum("subscribe","active","unsubscribe","inactive")', 'not null' => true, 'description' => 'subscription state'),
|
|
'sub_start' => array('type' => 'datetime', 'description' => 'subscription start'),
|
|
'sub_end' => array('type' => 'datetime', 'description' => 'subscription end'),
|
|
'last_update' => array('type' => 'datetime', 'not null' => true, 'description' => 'when this record was last updated'),
|
|
'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
|
|
'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
|
|
),
|
|
'primary key' => array('id'),
|
|
'unique keys' => array(
|
|
'feedsub_uri_key' => array('uri'),
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Fetch the StatusNet-side profile for this feed
|
|
* @return Profile
|
|
*/
|
|
public function localProfile()
|
|
{
|
|
if ($this->profile_id) {
|
|
return Profile::getKV('id', $this->profile_id);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Fetch the StatusNet-side profile for this feed
|
|
* @return Profile
|
|
*/
|
|
public function localGroup()
|
|
{
|
|
if ($this->group_id) {
|
|
return User_group::getKV('id', $this->group_id);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* @param string $feeduri
|
|
* @return FeedSub
|
|
* @throws FeedSubException if feed is invalid or lacks PuSH setup
|
|
*/
|
|
public static function ensureFeed($feeduri)
|
|
{
|
|
$current = self::getKV('uri', $feeduri);
|
|
if ($current instanceof FeedSub) {
|
|
return $current;
|
|
}
|
|
|
|
$discover = new FeedDiscovery();
|
|
$discover->discoverFromFeedURL($feeduri);
|
|
|
|
$huburi = $discover->getHubLink();
|
|
if (!$huburi && !common_config('feedsub', 'fallback_hub')) {
|
|
throw new FeedSubNoHubException();
|
|
}
|
|
|
|
$feedsub = new FeedSub();
|
|
$feedsub->uri = $feeduri;
|
|
$feedsub->huburi = $huburi;
|
|
$feedsub->sub_state = 'inactive';
|
|
|
|
$feedsub->created = common_sql_now();
|
|
$feedsub->modified = common_sql_now();
|
|
|
|
$result = $feedsub->insert();
|
|
if ($result === false) {
|
|
throw new FeedDBException($feedsub);
|
|
}
|
|
|
|
return $feedsub;
|
|
}
|
|
|
|
/**
|
|
* Send a subscription request to the hub for this feed.
|
|
* The hub will later send us a confirmation POST to /main/push/callback.
|
|
*
|
|
* @return bool true on success, false on failure
|
|
* @throws ServerException if feed state is not valid
|
|
*/
|
|
public function subscribe()
|
|
{
|
|
if ($this->sub_state && $this->sub_state != 'inactive') {
|
|
common_log(LOG_WARNING, "Attempting to (re)start PuSH subscription to {$this->uri} in unexpected state {$this->sub_state}");
|
|
}
|
|
if (empty($this->huburi)) {
|
|
if (common_config('feedsub', 'fallback_hub')) {
|
|
// No native hub on this feed?
|
|
// Use our fallback hub, which handles polling on our behalf.
|
|
} else if (common_config('feedsub', 'nohub')) {
|
|
// Fake it! We're just testing remote feeds w/o hubs.
|
|
// We'll never actually get updates in this mode.
|
|
return true;
|
|
} else {
|
|
// TRANS: Server exception.
|
|
throw new ServerException(_m('Attempting to start PuSH subscription for feed with no hub.'));
|
|
}
|
|
}
|
|
|
|
return $this->doSubscribe('subscribe');
|
|
}
|
|
|
|
/**
|
|
* Send a PuSH unsubscription request to the hub for this feed.
|
|
* The hub will later send us a confirmation POST to /main/push/callback.
|
|
* Warning: this will cancel the subscription even if someone else in
|
|
* the system is using it. Most callers will want garbageCollect() instead,
|
|
* which confirms there's no uses left.
|
|
*
|
|
* @return bool true on success, false on failure
|
|
* @throws ServerException if feed state is not valid
|
|
*/
|
|
public function unsubscribe() {
|
|
if ($this->sub_state != 'active') {
|
|
common_log(LOG_WARNING, "Attempting to (re)end PuSH subscription to {$this->uri} in unexpected state {$this->sub_state}");
|
|
}
|
|
if (empty($this->huburi)) {
|
|
if (common_config('feedsub', 'fallback_hub')) {
|
|
// No native hub on this feed?
|
|
// Use our fallback hub, which handles polling on our behalf.
|
|
} else if (common_config('feedsub', 'nohub')) {
|
|
// Fake it! We're just testing remote feeds w/o hubs.
|
|
// We'll never actually get updates in this mode.
|
|
return true;
|
|
} else {
|
|
// TRANS: Server exception.
|
|
throw new ServerException(_m('Attempting to end PuSH subscription for feed with no hub.'));
|
|
}
|
|
}
|
|
|
|
return $this->doSubscribe('unsubscribe');
|
|
}
|
|
|
|
/**
|
|
* Check if there are any active local uses of this feed, and if not then
|
|
* make sure it's inactive, unsubscribing if necessary.
|
|
*
|
|
* @return boolean true if the subscription is now inactive, false if still active.
|
|
*/
|
|
public function garbageCollect()
|
|
{
|
|
if ($this->sub_state == '' || $this->sub_state == 'inactive') {
|
|
// No active PuSH subscription, we can just leave it be.
|
|
return true;
|
|
} else {
|
|
// PuSH subscription is either active or in an indeterminate state.
|
|
// Check if we're out of subscribers, and if so send an unsubscribe.
|
|
$count = 0;
|
|
Event::handle('FeedSubSubscriberCount', array($this, &$count));
|
|
|
|
if ($count) {
|
|
common_log(LOG_INFO, __METHOD__ . ': ok, ' . $count . ' user(s) left for ' . $this->uri);
|
|
return false;
|
|
} else {
|
|
common_log(LOG_INFO, __METHOD__ . ': unsubscribing, no users left for ' . $this->uri);
|
|
return $this->unsubscribe();
|
|
}
|
|
}
|
|
}
|
|
|
|
static public function renewalCheck()
|
|
{
|
|
$fs = new FeedSub();
|
|
// the "" empty string check is because we historically haven't saved unsubscribed feeds as NULL
|
|
$fs->whereAdd('sub_end IS NOT NULL AND sub_end!="" AND sub_end < NOW() - INTERVAL 1 day');
|
|
if (!$fs->find()) { // find can be both false and 0, depending on why nothing was found
|
|
throw new NoResultException($fs);
|
|
}
|
|
return $fs;
|
|
}
|
|
|
|
public function renew()
|
|
{
|
|
$this->subscribe();
|
|
}
|
|
|
|
/**
|
|
* @return boolean true on successful sub/unsub, false on failure
|
|
*/
|
|
protected function doSubscribe($mode)
|
|
{
|
|
$this->query('BEGIN');
|
|
$orig = clone($this);
|
|
if ($mode == 'subscribe') {
|
|
$this->secret = common_random_hexstr(32);
|
|
}
|
|
$this->sub_state = $mode;
|
|
$this->update($orig);
|
|
unset($orig);
|
|
|
|
try {
|
|
$callback = common_local_url('pushcallback', array('feed' => $this->id));
|
|
$headers = array('Content-Type: application/x-www-form-urlencoded');
|
|
$post = array('hub.mode' => $mode,
|
|
'hub.callback' => $callback,
|
|
'hub.verify' => 'async', // TODO: deprecated, remove when noone uses PuSH <0.4 (only 'async' method used there)
|
|
'hub.verify_token' => 'Deprecated-since-PuSH-0.4', // TODO: rm!
|
|
|
|
'hub.secret' => $this->secret,
|
|
'hub.topic' => $this->uri);
|
|
$client = new HTTPClient();
|
|
if ($this->huburi) {
|
|
$hub = $this->huburi;
|
|
} else {
|
|
if (common_config('feedsub', 'fallback_hub')) {
|
|
$hub = common_config('feedsub', 'fallback_hub');
|
|
if (common_config('feedsub', 'hub_user')) {
|
|
$u = common_config('feedsub', 'hub_user');
|
|
$p = common_config('feedsub', 'hub_pass');
|
|
$client->setAuth($u, $p);
|
|
}
|
|
} else {
|
|
throw new FeedSubException('WTF?');
|
|
}
|
|
}
|
|
$response = $client->post($hub, $headers, $post);
|
|
$status = $response->getStatus();
|
|
if ($status == 202) {
|
|
$this->query('COMMIT');
|
|
common_log(LOG_INFO, __METHOD__ . ': sub req ok, awaiting verification callback');
|
|
return true;
|
|
} else if ($status >= 200 && $status < 300) {
|
|
common_log(LOG_ERR, __METHOD__ . ": sub req returned unexpected HTTP $status: " . $response->getBody());
|
|
} else {
|
|
common_log(LOG_ERR, __METHOD__ . ": sub req failed with HTTP $status: " . $response->getBody());
|
|
}
|
|
$this->query('ROLLBACK');
|
|
} catch (Exception $e) {
|
|
$this->query('ROLLBACK');
|
|
// wtf!
|
|
common_log(LOG_ERR, __METHOD__ . ": error \"{$e->getMessage()}\" hitting hub $this->huburi subscribing to $this->uri");
|
|
|
|
$orig = clone($this);
|
|
$this->sub_state = 'inactive';
|
|
$this->update($orig);
|
|
unset($orig);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Save PuSH subscription confirmation.
|
|
* Sets approximate lease start and end times and finalizes state.
|
|
*
|
|
* @param int $lease_seconds provided hub.lease_seconds parameter, if given
|
|
*/
|
|
public function confirmSubscribe($lease_seconds)
|
|
{
|
|
$original = clone($this);
|
|
|
|
$this->sub_state = 'active';
|
|
$this->sub_start = common_sql_date(time());
|
|
if ($lease_seconds > 0) {
|
|
$this->sub_end = common_sql_date(time() + $lease_seconds);
|
|
} else {
|
|
$this->sub_end = null; // Backwards compatibility to StatusNet (PuSH <0.4 supported permanent subs)
|
|
}
|
|
$this->modified = common_sql_now();
|
|
|
|
return $this->update($original);
|
|
}
|
|
|
|
/**
|
|
* Save PuSH unsubscription confirmation.
|
|
* Wipes active PuSH sub info and resets state.
|
|
*/
|
|
public function confirmUnsubscribe()
|
|
{
|
|
$original = clone($this);
|
|
|
|
// @fixme these should all be null, but DB_DataObject doesn't save null values...?????
|
|
$this->secret = '';
|
|
$this->sub_state = '';
|
|
$this->sub_start = '';
|
|
$this->sub_end = '';
|
|
$this->modified = common_sql_now();
|
|
|
|
return $this->update($original);
|
|
}
|
|
|
|
/**
|
|
* Accept updates from a PuSH feed. If validated, this object and the
|
|
* feed (as a DOMDocument) will be passed to the StartFeedSubHandleFeed
|
|
* and EndFeedSubHandleFeed events for processing.
|
|
*
|
|
* Not guaranteed to be running in an immediate POST context; may be run
|
|
* from a queue handler.
|
|
*
|
|
* Side effects: the feedsub record's lastupdate field will be updated
|
|
* to the current time (not published time) if we got a legit update.
|
|
*
|
|
* @param string $post source of Atom or RSS feed
|
|
* @param string $hmac X-Hub-Signature header, if present
|
|
*/
|
|
public function receive($post, $hmac)
|
|
{
|
|
common_log(LOG_INFO, __METHOD__ . ": packet for \"$this->uri\"! $hmac $post");
|
|
|
|
if ($this->sub_state != 'active') {
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring PuSH for inactive feed $this->uri (in state '$this->sub_state')");
|
|
return;
|
|
}
|
|
|
|
if ($post === '') {
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring empty post");
|
|
return;
|
|
}
|
|
|
|
if (!$this->validatePushSig($post, $hmac)) {
|
|
// Per spec we silently drop input with a bad sig,
|
|
// while reporting receipt to the server.
|
|
return;
|
|
}
|
|
|
|
$feed = new DOMDocument();
|
|
if (!$feed->loadXML($post)) {
|
|
// @fixme might help to include the err message
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring invalid XML");
|
|
return;
|
|
}
|
|
|
|
$orig = clone($this);
|
|
$this->last_update = common_sql_now();
|
|
$this->update($orig);
|
|
|
|
Event::handle('StartFeedSubReceive', array($this, $feed));
|
|
Event::handle('EndFeedSubReceive', array($this, $feed));
|
|
}
|
|
|
|
/**
|
|
* Validate the given Atom chunk and HMAC signature against our
|
|
* shared secret that was set up at subscription time.
|
|
*
|
|
* If we don't have a shared secret, there should be no signature.
|
|
* If we we do, our the calculated HMAC should match theirs.
|
|
*
|
|
* @param string $post raw XML source as POSTed to us
|
|
* @param string $hmac X-Hub-Signature HTTP header value, or empty
|
|
* @return boolean true for a match
|
|
*/
|
|
protected function validatePushSig($post, $hmac)
|
|
{
|
|
if ($this->secret) {
|
|
if (preg_match('/^sha1=([0-9a-fA-F]{40})$/', $hmac, $matches)) {
|
|
$their_hmac = strtolower($matches[1]);
|
|
$our_hmac = hash_hmac('sha1', $post, $this->secret);
|
|
if ($their_hmac === $our_hmac) {
|
|
return true;
|
|
}
|
|
if (common_config('feedsub', 'debug')) {
|
|
$tempfile = tempnam(sys_get_temp_dir(), 'feedsub-receive');
|
|
if ($tempfile) {
|
|
file_put_contents($tempfile, $post);
|
|
}
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring PuSH with bad SHA-1 HMAC: got $their_hmac, expected $our_hmac for feed $this->uri on $this->huburi; saved to $tempfile");
|
|
} else {
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring PuSH with bad SHA-1 HMAC: got $their_hmac, expected $our_hmac for feed $this->uri on $this->huburi");
|
|
}
|
|
} else {
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring PuSH with bogus HMAC '$hmac'");
|
|
}
|
|
} else {
|
|
if (empty($hmac)) {
|
|
return true;
|
|
} else {
|
|
common_log(LOG_ERR, __METHOD__ . ": ignoring PuSH with unexpected HMAC '$hmac'");
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|